JP2855878B2 - Optical self-routing circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical self-routing circuit for performing routing according to a header of an optical packet signal.

[0002]

2. Description of the Related Art Optical communication using optical fibers for transmission lines
It is expected that the optical fiber will be widely used in the future because it has the advantages of being able to transmit a large amount of information because of its wide band and the optical fiber not receiving induced noise. As an exchange used in this optical communication, an optical exchange capable of exchanging optical signals in an optical region is desirable.

[0003] Among them, an optical packet switch that handles packetized optical signals is promising because it can efficiently exchange information of various signal speeds. Such an optical packet switch requires an optical self-routing circuit that reads a header portion of an optical packet signal and performs routing in accordance with the header portion. Conventionally, as such a circuit, there is an optical self-routing circuit shown in FIG.
307649).

In FIG. 26, optical waveguides 101 and 102 are shown.
The optical packet signals A and B input to the
3, 104, and optical gates 105, 106
And 107 and 108. Optical gates 105 and 10
The output optical signal 7 is combined by the optical combiner 109 and output from the optical waveguide 111. The output optical signals from the optical gates 106 and 108 are combined by the optical combiner 110 and output from the optical waveguide 112. The same electric pulse is supplied from the electric pulse generation circuit 113 to the optical gates 105 and 107 to the optical gate 10.
Another electrical pulse is applied to 6,108.

FIG. 27 shows the optical gates 105 to 10 of FIG.
8 is a view for explaining one structure of FIG. In FIG. 27, the optical gate is connected to one end face 222 of the light guide layer 2210.
0 and the other end face 2230, and an input optical signal 2200 is input to one end face 2220 of the light guide layer 2210,
Then, an output optical signal 2250 is output from the other end face 2230. Further, a control signal V is applied via the electrode 2240. When the input optical signal 2200 is incident when V = V _H , this optical gate will thereafter have V = V _L (V _L <V _H ).
While the voltage is applied, the input optical signal is amplified and output. The details of such an optical gate are described in the Proceedings of the Japan Society of Applied Physics Fall Meeting 1990, page 754, lecture number 26p-H-2.

FIG. 28 is a time chart for explaining the operation of FIG. (A) Optical gates 105 and 107
Shows the applied electrical pulses to, next between V _H at time t1 to t2, keeps between V _L of T2-T6. (B) Optical gate 1
06, 108 applied electric pulses at times t2 to t3
Next between V _H and kept between V _L of t3 to t6. Optical gate 1
The optical packet signal A incident on the optical discs 05 and 106 is (c)
As shown in the figure, the header part optical signal exists only between times t1 and t2. Therefore, in the optical gate 105, the time during which the electric pulse is at V _H coincides with the time during which the header part optical signal exists, but the optical gate 106 does not. Therefore, the data portion of the optical packet signal A passes through only the optical gate 105 and is routed to the optical waveguide 111 via the optical coupler 109. On the other hand, the optical packet signal B incident on the optical gates 107 and 108 has a header part optical signal only between times t2 and t3 as shown in (d). Therefore, at the optical gate 108, the time during which the electric pulse is at V _H coincides with the time during which the header portion optical signal exists, but the optical gate 107 does not. Therefore, the data portion of the optical packet signal B passes through only the optical gate 108 and is routed to the optical waveguide 112 via the optical coupler 110.

As described above, in the optical self-routing circuit of FIG. 26, the header portion of the optical packet
Alternatively, self-routing to the optical waveguide 111 or 112 is performed depending on whether it is at t2 or t3.

[0008]

In the above-described conventional optical self-routing circuit, if the header part optical signals of the optical packet signals A and B input to the optical waveguides 101 and 102 exist at the same time, the optical self-routing circuit will The data portions of the packet signals A and B pass through the optical gates 105 and 107 or the optical gates 106 and 108, respectively. Therefore, in this case, there is a problem that the data portions of the optical packet signals A and B are simultaneously output from the optical waveguides 111 and 112 via the optical couplers 109 and 110, and a collision of the data portions occurs.

An object of the present invention is to provide an optical self-routing circuit that does not cause collision of a plurality of optical packet signals.

[0010]

An optical self-routing circuit according to a first aspect of the present invention provides an optical self-routing circuit for converting an optical signal from each of n input terminals into an m signal.
N optical splitters for splitting into n optical signals, and n optical gate elements, which are connected to the output terminals of the n optical splitters and belong to different m optical splitter systems, are connected to one another. M as a group
A first optical gate switch stage composed of a plurality of optical gate element groups and one output of each of the (n × m) optical gate elements constituting the first optical gate switch stage are input one by one. A second optical gate switch stage composed of m optical gate element groups each including n optical gate elements;
M n optical combiners for combining outputs of n optical gate elements constituting each of the m optical gate element groups of the second optical gate switch stage and emitting the same to each of m output terminals; First
Supplying each of the first group of electric pulses to each of the m optical gate element groups of the optical gate switch stage, and applying the second electrical pulse group to each of the m optical gate element groups of the second optical gate switch stage. An electrical pulse generating circuit for supplying each of the electrical pulse groups, wherein the optical self-routing circuit exchanges optical signals between the n input terminals and the m output terminals. Is composed of a first header used in the first optical gate switch stage, a second header used in the second optical gate switch stage, and data subsequent thereto, and the first and second Headers are respectively set corresponding to time positions previously allocated to the m output terminals, and the electric pulse generation circuit is connected to each of the m optical gate element groups of the first optical gate switch stage. The second optical gate switch Are connected to each of the m optical gate element groups through a first resistor, and the n optical gate elements constituting each of the m optical gate element groups of the first optical gate switch stage are respectively The first group of electric pulses having the same amplitude from the electric pulse generating circuit are electrically connected in cascade so as to be applied, and each of n groups of m optical gate elements of the second optical gate switch stage is formed. The plurality of optical gate elements are electrically connected in cascade such that respective second electric pulses having different amplitudes are applied from the electric pulse generation circuit via respective second resistors, and the first electric Each pulse group is held at a high level voltage within a time position corresponding to each of the output terminals, and is then held at a lower middle level voltage for at least the data length and the second header of the optical signal, and thereafter Smaller low level The voltage drop is periodically repeated, and each of the second electric pulses is held at a high level voltage within a time position corresponding to each of the output terminals, and then to a lower medium level voltage. The optical signal is held for at least the data length and then periodically reduced to a lower low-level voltage. The first optical gate switch stage includes a first header of the optical signal and the first header of the optical signal. Current is injected from the electric pulse generation circuit to the optical gate element to which the high level voltage of each of the first electric pulse groups is simultaneously applied while the medium level voltage of each of the first electric pulse groups is held;
The optical gate element into which the current is injected is the second of the optical signal.
And the second optical gate switch stage passes the second header and the second optical signal incident on the n optical gate elements of each of the m optical gate element groups. The electric pulse generation circuit outputs the first electric pulse from the electric pulse generation circuit during a time when the medium level voltage of each of the second electric pulse groups is held to the optical gate element to which the high level voltage of the maximum amplitude of each electric pulse group is simultaneously applied. A current is injected through a resistor, and the optical gate element, into which the current is injected by each of the second electric pulse groups, allows the data of the optical signal to pass therethrough, and generates the current generated by the current and the first resistor. An optical self-router, wherein the remaining (n-1) optical gate elements of each of the optical gate element groups are prevented from passing the data due to a high level voltage drop of each of the two electric pulse groups. Ring circuit.

The optical self-routing circuit according to a second aspect of the present invention comprises an n-m optical splitter for splitting an optical signal from each of the n input terminals into m optical signals, and the n-m optical splitter. A first optical gate switch stage connected to the output end of the optical device, the first optical gate switch stage being composed of m optical gate element groups each including n optical gate elements belonging to a different m optical branching system; The output of each of the (n × m) optical gate elements constituting the first optical gate switch stage is input one by one, and m optical gate element groups including n optical gate elements as one group And the outputs of the n optical gate elements constituting each of the m optical gate element groups of the second optical gate element are merged into each of the m output terminals. M outgoing n optical combiners and m optical gates of the first optical gate switch stage An electric pulse generating circuit for supplying each of the first group of electric pulses to each of the subgroups, and supplying each of the second group of electric pulses to each of the m optical gate element groups of the second optical gate switch stage And n
Self-routing circuit for exchanging optical signals between the input terminals and the m output terminals, wherein the optical signals are provided in a first header and a second header used in the first optical gate switch stage. The second and third headers are used in the optical gate switch stage of the first embodiment, and the first and second headers respectively correspond to time positions pre-assigned to the m output terminals. The electrical pulse generation circuit is connected to each of the m optical gate element groups of the first optical gate switch stage, and is connected to each of the m optical gate element groups of the second optical gate switch stage. N optical gate elements connected to each other and constituting each of the m optical gate element groups of the first optical gate switch stage are each a first electric pulse group having the same amplitude from the electric pulse generation circuit. As each is applied The n optical gate elements electrically connected in cascade and forming each of the m optical gate element groups of the second optical gate switch stage are each a second electric gate having the same amplitude from the electric pulse generation circuit. Each group of pulses is electrically cascaded such that each of the first group of electrical pulses is held at a high level voltage within a time position corresponding to each of the output terminals, and then a lower medium voltage is applied. The level voltage is held for at least the data length of the second header of the optical signal and the data length, and thereafter, the voltage is further lowered to a lower low level voltage. Within each corresponding time position, held at a high level voltage, then held at a lower, medium level voltage for at least the data length of the optical signal, and then dropped to a lower, lower level voltage Is periodically repeated, and the first optical gate switch stage applies the first header of the optical signal and the high-level voltage of each of the first electric pulse group to the optical gate element to which the high level voltage is simultaneously applied. A current is injected from the electric pulse generation circuit at a time when the medium level voltage of each of the first electric pulse groups is held,
The optical gate element into which the current is injected is the second of the optical signal.
In the second optical gate switch stage, the second header having the maximum light quantity of the optical signal incident on the n optical gate elements of each of the m optical gate element groups. The electric pulse generating circuit supplies the high-level voltage of each of the second electric pulse groups to the optical gate element to which the medium-level voltage of each of the second electric pulse groups is simultaneously applied to the optical gate element. The optical gate element into which the current is injected and the current is injected by each of the second electric pulse groups passes the data of the optical signal, and the second electric pulse group generated by the current and the resistance. , The remaining (n-1) optical gate elements of each of the optical gate element groups are prevented from passing the data.

The optical self-routing circuit according to a third aspect of the present invention is an optical self-routing circuit comprising an i-th optical gate switch stage (where i = 1 to 1).
and log ₂ n) is 2 ^(log2n-i) consists of pieces of the 2 × 1 optical gate element (log ₂ n) pieces of optical gate switch stage supplies electrical pulses to the 2 × 1 optical gate element, respectively An optical self-routing circuit configured to include an electric pulse circuit and exchange optical signals between n input terminals and one output terminal, wherein the optical signal is the (log ₂ n)
Used in each of the optical gate switch stages (log ₂ n
) Headers followed by data, i
The output of the 2 × 1 optical gate element belonging to the switch stage of the stage is connected to the input of the 2 × 1 optical gate device belonging to the (i + 1) th switch stage one by one in a tree shape, and the electric pulse generating circuit Is connected to each of the 2 × 1 optical gate elements via a first resistor, and each of the 2 × 1 optical gate elements is one that merges two optical gate elements and an output of the two optical gate elements. Are electrically connected in cascade such that the electric pulses having different amplitudes are applied to the two optical gate elements from the electric pulse generation circuit via a second resistor, respectively. Each electric pulse applied to each of the 2 × 1 optical gate elements of the i-th optical gate switch stage is held at a high level voltage, and then is set to a lower intermediate level voltage than the (i + 1) th and subsequent stages. 2 × 1 optical game belonging to switch stage The data is held for at least the length of the header and data used by each element, and thereafter, the voltage is reduced to a lower voltage, which is periodically repeated. The i-th optical gate switch forms a 2 × 1 optical gate element. I of the optical signal incident in the two optical gate elements
Current is injected while the middle level voltage of the electric pulse is held in the optical gate element to which the header for the optical gate switch stage of the stage and the high level voltage of the maximum amplitude of the electric pulse are simultaneously applied, The optical gate element, into which a current is injected by the electric pulse, passes a header and data used in each of the 2 × 1 optical gate elements belonging to the (i + 1) th and subsequent switch stages of the optical signal. Due to the high-level voltage drop of the electric pulse caused by the first resistor, another 2 × 1 optical gate element of the 2 × 1 optical gate element belongs to the (i + 1) th or later switch stage of the optical signal. An n × 1 optical self-routing circuit, wherein the passage of a header and data used in each of the optical gate elements is suppressed.

The optical self-routing circuit according to a fourth aspect of the present invention is the optical self-routing circuit of the i-th optical gate switch stage (where i = 1 to 1).
and log ₂ n) is 2 ^(log2n-i) consists of pieces of the 2 × 1 optical gate element (log ₂ n) pieces of optical gate switch stage supplies electrical pulses to the 2 × 1 optical gate element, respectively An optical self-routing circuit configured to include an electric pulse circuit and exchange optical signals between n input terminals and one output terminal, wherein the optical signal is the (log ₂ n)
Used in each of the optical gate switch stages (log ₂ n
) Headers followed by data, i
The output of the 2 × 1 optical gate element belonging to the second switch stage is connected to the input of the 2 × 1 optical gate element belonging to the (i + 1) th switch stage one by one in a tree form, and the electric pulse generation circuit is provided. Is connected to each of the 2 × 1 optical gate elements via a resistor, and each of the 2 × 1 optical gate elements is a two-junction which joins two optical gate elements and an output of the two optical gate elements. And an electrical cascade connected to the two optical gate elements so that electric pulses having the same amplitude are applied from the electric pulse generation circuit to the two optical gate elements, respectively. Each of the electrical pulses applied to each of the x1 optical gate elements is held at a high level voltage and then to a lower intermediate level voltage (i +
1) It is held for at least the data length and the header used in the 2 × 1 optical gate element belonging to the switch stage after the stage,
Thereafter, the lowering to a smaller low level voltage is periodically repeated, and in the i-th stage optical gate switch, 2
The header of the maximum light amount for the i-th optical gate switch stage of the optical signal incident on the two optical gate devices constituting the x1 optical gate device and the high level voltage of the electric pulse are applied simultaneously. A current is injected into the optical gate element while the middle level voltage of the electric pulse is held, and the optical gate element into which the current is injected by the electric pulse is a switch of the (i + 1) th stage or later of the optical signal. The header and data used in each of the 2 × 1 optical gate elements belonging to the stage are passed and another light of the 2 × 1 optical gate element is generated by the high level voltage drop of the electric pulse generated by the current and the resistance. The gate element is (i +
1) It is characterized in that the passage of a header and data used in each of the 2 × 1 optical gate elements belonging to the subsequent switch stages is suppressed.

According to a fifth aspect of the present invention, there is provided an optical self-routing circuit comprising: n optical gate elements for receiving optical signals from n input terminals; and one output by combining the outputs of the n optical gate elements. One optical coupler for emitting light to the output end of
A self-routing circuit for exchanging optical signals between the n input terminals and one output terminal, the electric self-routing circuit comprising: Wherein the optical signal is composed of a header and data following the header, the electric pulse generating circuit is connected to the n optical gate elements via a first resistor, and the n optical gates The elements are each electrically cascaded such that electric pulses of different amplitudes are applied from the electric pulse generating circuit via the second resistors, respectively, the electric pulses being held at a high level voltage, and The optical signal is held at the lower middle level voltage for the data length of the optical signal for more than the data length, and thereafter is dropped to the lower low level voltage, which is periodically repeated, and is incident on the n optical gate elements. The light A signal header and a high-level voltage having a maximum amplitude of the electric pulse are simultaneously applied to the optical gate element, and the electric pulse generating circuit outputs the first resistance from the electric pulse generating circuit during the time when the medium-level voltage of the electric pulse is held. The optical gate element, into which the current is injected by the electric pulse, allows the data of the optical signal to pass, and the high-level voltage drop of the electric pulse caused by the current and the first resistor causes The remaining (n-1) optical gate elements of the n optical gate elements are prevented from passing the data.

The optical self-routing circuit according to a sixth aspect of the present invention is an optical self-routing circuit comprising: n optical gate elements for receiving optical signals from each of n input terminals; and one output by combining the outputs of the n optical gate elements. One optical coupler for emitting light to the output end of
A self-routing circuit for exchanging optical signals between the n input terminals and one output terminal, the electric self-routing circuit comprising: Wherein the optical signal is composed of a header and subsequent data, the electric pulse generation circuit is connected to the n optical gate elements via a resistor, and the n optical gate elements are each The electric pulse generation circuit is electrically connected in cascade such that electric pulses having the same amplitude are applied, the electric pulses are held at a high level voltage, and then the data of the optical signal is changed to a lower intermediate level voltage. It is held for longer than a long time, and then dropped to a smaller low-level voltage periodically, and the header and the maximum light amount of the optical signal incident on the n optical gate elements are the same as the header. A current is injected from the electric pulse generation circuit through the resistor during a time when the medium level voltage of the electric pulse is held to the optical gate element to which the high level voltage of the electric pulse is simultaneously applied, and the electric pulse Is injected and the optical gate element passes the data of the optical signal and the high level voltage drop of the electrical pulse caused by the current and the resistance causes the remaining (n-1) of the n optical gate elements to drop. ) The number of optical gate elements is suppressed from passing the data.

According to a seventh aspect of the present invention, there is provided an optical self-routing circuit comprising: n m optical splitters for splitting optical signals from each of n input terminals into m optical signals; and m n × 1 optical self-routing circuits. And an electric pulse generation circuit for supplying an electric pulse to each of the m n × 1 optical self-routing circuits, wherein m outputs of each of the n m optical splitters are the m different n × 1 optical self-routing circuit is connected, the output of each of the m different n × 1 optical self-routing circuits is connected to m output terminals, and the n input terminals and m output terminals are connected. An optical self-routing circuit for exchanging optical signals between the m self-routing circuits.
Each of the optical self-routing circuits has _two i-th optical gate switch stages (i = 1 to log ₂ n).
^{It is} composed of ^(log2n-i) 2 × 1 optical gate elements (l
og ₂ n) optical gate switch stages, and the output of the 2 × 1 optical gate device belonging to the i-th switch stage is the input of the 2 × 1 optical gate device belonging to the (i + 1) -th switch stage. And the electrical pulse generation circuit is connected to each of the 2 × 1 optical gate elements constituting each of the m n × 1 optical self-routing circuits via a first resistor. Each of the 2 × 1 optical gate elements constituting each of the m n × 1 optical self-routing circuits has two optical gate elements and one two-combiner for merging the outputs of the two optical gate elements. From the electric pulse generation circuit to the two optical gate elements, respectively.
Are electrically connected in cascade such that the electric pulses having different amplitudes are applied thereto, and the optical signal is applied to each of the m n × 1 optical self-routing circuits (log
₂ n) used in the number of optical gate switch stage respectively (lo
g ₂ n) headers and subsequent data, wherein each of the (log ₂ n) headers is set corresponding to a time position pre-assigned to the m output terminals, and Each of the electric pulses applied to each of the 2 × 1 optical gate elements of the i-th optical gate switch stage of each of the n × 1 optical self-routing circuits of the above-mentioned n × 1 optical self-routing circuits is held at a high level voltage, and then a lower intermediate level voltage The above (i +
1) It is held for at least the data length and the header used in the 2 × 1 optical gate element belonging to the switch stage after the stage,
Thereafter, the dropping to a lower low-level voltage is periodically repeated, and in the i-th optical gate switch of each of the m pieces of n × 1 optical self-routing circuits, two of the 2 × 1 optical gate elements forming the 2 × 1 optical gate element are formed. The header for the i-th optical gate switch stage of the optical signal incident on the optical gate device and the high-level voltage having the maximum amplitude of the electrical pulse are simultaneously applied to the optical gate device to which the electrical pulse is applied. A current is injected while the level voltage is held, and the optical gate element to which the current is injected by the electric pulse is a 2 × 1 optical gate element belonging to the (i + 1) th or later switch stage of the optical signal. The other light of the 2 × 1 optical gate element is passed by the high level voltage drop of the electrical pulse which occurs in the current and the first resistor, respectively, passing the header and data used. Over preparative element of the optical signal (i +
1) It is characterized in that the passage of a header and data used in each of the 2 × 1 optical gate elements belonging to the subsequent switch stages is suppressed.

An optical self-routing circuit according to an eighth aspect of the present invention is an optical self-routing circuit comprising: n m optical splitters for splitting optical signals from each of n input terminals into m optical splitters; And an electric pulse generation circuit for supplying an electric pulse to each of the m n × 1 optical self-routing circuits, wherein m outputs of each of the n m optical splitters are the m different n × 1 optical self-routing circuit is connected, the output of each of the m different n × 1 optical self-routing circuits is connected to m output terminals, and the n input terminals and m output terminals are connected. An optical self-routing circuit for exchanging optical signals between the m self-routing circuits.
Each of the optical self-routing circuits has _two i-th optical gate switch stages (i = 1 to log ₂ n).
^{It is} composed of ^(log2n-i) 2 × 1 optical gate elements (l
og ₂ n) optical gate switch stages, and the output of the 2 × 1 optical gate device belonging to the i-th switch stage is the input of the 2 × 1 optical gate device belonging to the (i + 1) -th switch stage. The electric pulse generation circuit is connected to each of the 2 × 1 optical gate elements constituting each of the m n × 1 optical self-routing circuits via a resistor. 2 × 1 optical gate elements constituting each of the n × 1 optical self-routing circuits
The optical pulse generating circuit is composed of two optical gate elements and one two-merging device that merges the outputs of the two optical gate elements. Electric pulses having the same amplitude from the electric pulse generating circuit are respectively supplied to the two optical gate elements. It is electrically connected in cascade as applied the optical signal the of m n × 1 optical self-routing circuit respectively (log ₂ n) used in the number of optical gate switch stage each (log ₂ n) pieces of Each of the (log ₂ n) headers is set in accordance with a time position previously allocated to the m output terminals, and includes the m n × 1 optical self-addresses. Each electric pulse applied to each of the 2 × 1 optical gate elements of the i-th optical gate switch stage of each routing circuit is held at a high level voltage, and then the (i + 1) stage is set to a lower intermediate level voltage. Eye The header and data length used in each of the 2 × 1 optical gate elements belonging to the falling switch stage are held for at least the data length, and thereafter, the voltage is further reduced to a lower low-level voltage periodically. In the i-th optical gate switch of each optical self-routing circuit, 2
The header of the maximum light amount for the i-th optical gate switch stage of the optical signal incident on the two optical gate devices constituting the x1 optical gate device and the high level voltage of the electric pulse are applied simultaneously. A current is injected into the optical gate element while the middle level voltage of the electric pulse is held, and the optical gate element into which the current is injected by the electric pulse is a switch of the (i + 1) th stage or later of the optical signal. The header and data used in each of the 2 × 1 optical gate elements belonging to the stage are passed and another light of the 2 × 1 optical gate element is generated by the high level voltage drop of the electric pulse generated by the current and the resistance. The gate element is (i +
1) It is characterized in that the passage of a header and data used in each of the 2 × 1 optical gate elements belonging to the subsequent switch stages is suppressed.

The optical self-routing circuit according to a ninth aspect of the present invention comprises an n-m optical splitter for branching the optical signal from each of the n input terminals into m, and an m-n × 1 optical self-routing circuit. And an electric pulse generation circuit for supplying an electric pulse to each of the m n × 1 optical self-routing circuits, wherein m outputs of each of the n m optical splitters are the m different n × 1 optical self-routing circuit is connected, the output of each of the m different n × 1 optical self-routing circuits is connected to m output terminals, and the n input terminals and m output terminals are connected. An optical self-routing circuit for exchanging optical signals between the optical self-routing circuits, wherein each of the m optical self-routing circuits includes n optical gate elements that receive an optical signal from each of the n input terminals, Output of the n optical gate elements 1 merges emitted to one output terminal
N optical couplers, and the electric pulse generation circuit is connected to n optical gate elements constituting each of the m optical self-routing circuits via a first resistor,
N forming each of the m optical self-routing circuits
The optical gate elements are electrically connected in cascade such that electric pulses having different amplitudes are applied from the electric pulse generation circuit via the second resistors, and the optical signal is a header and data following the header. Wherein the header is set corresponding to a time position previously allocated to the m output terminals, and is applied to n optical gate elements constituting each of the m optical self-routing circuits. The electrical pulse is held at a high level voltage and then at a lower mid level voltage for at least the data length of the optical signal,
Thereafter, the lowering of the voltage to a smaller low level voltage is periodically repeated, and the header of the optical signal and the electric signal which are incident in the n optical gate elements constituting each of the m optical self-routing circuits are connected. A current is injected from the electric pulse generation circuit through the first resistor during a time when the middle level voltage of the electric pulse is held in the optical gate element to which the high-level voltage having the maximum amplitude of the pulse is simultaneously applied,
The optical gate element, into which a current is injected by the electric pulse, passes the data of the optical signal, and the n optical gates are formed by a high-level voltage drop of the electric pulse caused by the current and the first resistor. The remaining (n-
1) The number of optical gate elements is suppressed from passing the data.

The optical self-routing circuit according to a tenth aspect of the present invention is characterized in that the optical self-routing circuit includes n m optical splitters for splitting the optical signals from each of the n input terminals into m optical splitters, and m n × 1 optical self-routing circuits. And an electric pulse generating circuit for supplying an electric pulse to each of the m n × 1 optical self-routing circuits, wherein m outputs of each of the n m optical splitters are the m different n × 1 optical self-routing circuit is connected, the output of each of the m different n × 1 optical self-routing circuits is connected to m output terminals, and the n input terminals and m output terminals are connected. An optical self-routing circuit for exchanging optical signals between the optical self-routing circuits, wherein each of the m optical self-routing circuits includes n optical gate elements that receive an optical signal from each of the n input terminals, The output of the n optical gate elements , And one n-optical combiner for emitting to one output terminal, wherein the electric pulse generating circuit comprises n optical gate elements constituting the m n × 1 optical self-routing circuits; N connected via a resistor to constitute the m n × 1 optical self-routing circuits
The optical gate elements are electrically connected in cascade such that electric pulses having the same amplitude are applied from the electric pulse generation circuit, and the optical signal is composed of a header and subsequent data, Is set corresponding to a time position previously assigned to the m output terminals, and
The electric pulse applied to the n optical gate elements constituting the n × 1 optical self-routing circuits is held at a high level voltage, and then is reduced to a medium level voltage smaller than the data length of the optical signal. And then dropped to a smaller low-level voltage periodically, and n constituting the m n × 1 optical self-routing circuits is repeated.
Time during which the middle level voltage of the electric pulse is held in the optical gate element to which the header which is the maximum light quantity of the optical signal incident on the optical gate elements and the high level voltage of the electric pulse are simultaneously applied. A current is injected from the electric pulse generation circuit through the resistor, and the light gate element, into which the current is injected by the electric pulse, passes the data of the optical signal and the electric current generated by the current and the resistance. The remaining (n-1) optical gate elements of the n optical gate elements are prevented from passing the data by the drop of the high level voltage of the pulse.

[0020]

According to the optical self-routing circuit of the present invention, when a header optical signal of a plurality of optical packet signals is present at the same time and a collision of optical packet signals occurs, the value of the applied voltage or the header optical signal is reduced. When one of the optical gates connected to the same output terminal is allowed to pass the optical packet signal in accordance with the priority according to the magnitude of the light amount, the other optical gates cannot pass the optical packet signal. Self-routing can be performed without simultaneously outputting a plurality of packet optical signals.

[0021]

FIG. 1 shows an optical self-routing circuit according to an embodiment of the first invention. In FIG. 1, the optical waveguides 101, 1
02, optical splitters 103 and 104, optical gates 105 to 10
The portion composed of 8 performs the same operation as the conventional optical self-routing circuit of FIG.

The output optical signals of the optical gates 105 and 106 are:
The optical signals input to the optical gates 114 and 115, respectively, and the output optical signals of the optical gates 107 and 108 are output from the optical gates 116 and 1 respectively.
17 is incident. Output optical signals from the optical gates 114 and 116 are combined by the optical combiner 109 and output from the optical waveguide 111. The output optical signals from the optical gates 115 and 117 are combined by the optical coupler 110 and output from the optical waveguide 112. From the electric pulse generation circuit 113, the same electric pulse is applied to the optical gates 105 and 107, and another electric pulse is applied to the optical gates 106 and 108. The same electric pulse is sent from the electric pulse generation circuit 113 to the optical gate 114 via the resistor 120 and to the optical gate 116 via the resistors 120 and 121, to the optical gate 115 via the resistor 122, and to the resistors 122 and 123. Is applied to the optical gate 117 at another timing.

FIG. 2 is a timing chart for explaining the operation of the optical self-routing circuit of FIG.
(A) shows an electric pulse applied to the optical gates 105 and 107, which is V _H0 between times t1 and t2, and is between times t2 and t7.
During this period, V _L0 is maintained. (B) shows an electric pulse applied to the optical gates 106 and 108, which is V _H0 between times t2 and t3, and maintains V _L0 between times t3 and t7. (C) is a resistor 12
0, and V _H0 between time t3 and t4.
Keep between V _L0 of time t4~t7. (D) Optical gate 11
4 indicates that the electric pulse 202 is applied to the resistor 120
Since applied _{through, V H1 (V H1 <V} H0) of less than between V _H0 times t3~t4 next, V _L1 smaller than V _L0 is between t4 to t7 (V _L1 <V _L0 ).
Further, (e) shows the voltage applied to the optical gate 116, and since the electric pulse 202 is applied via the resistors 120 and 121, V _H2 (V _{H2) having a} value smaller than V _H1 between times t3 and t4. <V _H1 ), and V is also maintained between times t4 and t7.
Keep V _L2 smaller than _L1 . Optical gates 105 and 10
As shown in (f), the optical packet signal A incident on the optical signal 6 has a header part optical signal of the light amount P1 at times t1 to t2 and t3 to t4, and a data part optical signal at times t5 to t6. . As shown in (g), the optical packet signal B incident on the optical gates 107 and 108 includes a header part optical signal of the light amount P1 at times t1 to t2 and t3 to t4, and a data part optical signal at times t5 to t6. Exists.

Optical gate 1 on which optical packet signal A is incident
At time 05, the time during which the applied voltage is V _H0 and the time during which the header part optical signal of the optical packet signal A is present are from time t1 to t2.
, But not at the optical gate 106. Therefore, the header part optical signal and the data part optical signal existing at the time t3 to t4 of the optical packet signal A pass through only the optical gate 105 and enter the optical gate 114. At the optical gate 107 into which the optical packet signal B is incident, the time during which the electric pulse is at V _H0 and the time during which the optical signal of the header of the optical packet signal B is present coincide with t1 to t2, but the optical gate 108 does not. . Therefore, the header part optical signal and the data part optical signal existing at the time t3 to t4 of the optical packet signal B pass through the optical gate 107 and enter the optical gate 116.

In the optical gates 114 and 116 to which the output optical signals from the optical gates 105 and 107 are respectively incident, the time when the applied voltages are V _H1 and V _H2 , respectively, The time during which the signal exists is from t3 to t4.
Matches. However, since the value of the applied voltage of the optical gate 114 is larger than the applied voltage V _H1 and the applied voltage V _H2 of the optical gate 116, the optical gate 114 is faster than the optical gate 116 to the operation state where the subsequent data part optical signal is transmitted. Switch. When the optical gate 114 shifts to this operation state, the injection current to the optical gate 114 increases, and this injection current and the resistance 12
Since the voltage applied to the optical gate 116 decreases due to the voltage drop due to 0, the optical gate 116 can no longer transmit the subsequent data part optical signal. As described above, due to the differential operation of the optical gates 114 and 116, only the data part optical signal of the optical packet signal A passes through the optical gate 114 and is routed to the optical waveguide 111 via the optical coupler 109. For details of the differential operation of the optical gate elements 114 and 116, see Yoshihara et al. Please refer to.

As described above, the optical self-routing circuit shown in FIG. 1 is different from the conventional optical self-routing circuit shown in FIG. 26 in that the optical self-routing circuit shown in FIG. Thus, even if a collision occurs between optical packet signals, one optical packet signal can be output preferentially.

FIG. 3 shows an optical self-routing circuit according to the second embodiment of the present invention, in which the same reference numerals as those in FIG.

The output optical signals of the optical gates 105 and 106 are
The optical signals input to the optical gates 114 and 115, respectively, and the output optical signals of the optical gates 107 and 108 are output from the optical gates 116 and 1 respectively.
17 is incident. Output optical signals from the optical gates 114 and 116 are combined by the optical combiner 109 and output from the optical waveguide 111. The output optical signals from the optical gates 115 and 117 are combined by the optical coupler 110 and output from the optical waveguide 112. From the electric pulse generation circuit 113, the same electric pulse is applied to the optical gates 105 and 107, and another electric pulse is applied to the optical gates 106 and 108. Further, an electric pulse is applied from the electric pulse generation circuit 113 to the optical gates 114 and 116 via the resistor 300, and an electric pulse at another timing is applied to the optical gates 115 and 117 via the resistor 301.

FIG. 4 is a timing chart for explaining the operation of the optical self-routing circuit of FIG.
(A) shows an electric pulse applied to the optical gates 105 and 107, which is V _H0 between times t1 and t2, and is between times t2 and t7.
During this period, V _L0 is maintained. (B) shows an electric pulse applied to the optical gates 106 and 108, which is V _H0 between times t2 and t3, and maintains V _L0 between times t3 and t7. (C) is a resistor 30
0 indicates an applied electric pulse, and V _H0 is applied between times t3 and t4.
, And V _L0 is maintained from time t4 to t7. (D) shows the applied voltage of the optical gate 116, and since the electric pulse 204 is applied via the resistor 120, the voltage V
Of less than _{H0 V H1 (V H1 <V} H0) , and the time t
V _L1 (V _L1 smaller than V _L0 is between 4～T7 <
V _L0 ). The optical packet signal A incident on the optical gates 105 and 106 is, as shown in FIG.
And between times t3 and t4, the light amounts are P1 and P2 (P1>
The header part optical signal of P2) exists, and the data part optical signal exists at times t5 to t6. As shown in (f), the optical packet signal B incident on the optical gates 107 and 108 has the header part optical signal of the light amount P2 at both times t1 to t2 and t3 to t4, and the data part light at times t5 to t6. There is a signal.

Optical gate 1 on which optical packet signal A is incident
05, the time during which the electric pulse is at V _H0 and the time during which the header portion optical signal of the optical packet signal A is present at times t1 to t
2 but not at the optical gate 106. Therefore, the header part optical signal and the data part optical signal existing at the time t3 to t4 of the optical packet signal A pass through only the optical gate 105 and enter the optical gate 114. At the optical gate 107 into which the optical packet signal B is incident, the time during which the electric pulse is at V _H0 and the time during which the optical signal of the header of the optical packet signal B is present coincide with t1 to t2, but the optical gate 108 does not. . Therefore, the header part optical signal and the data part optical signal existing at the time t3 to t4 of the optical packet signal B pass through only the optical gate 107 and enter the optical gate 116.

In the optical gates 114 and 116 to which the output optical signals from the optical gates 105 and 107 are respectively incident, the time when the applied voltage is V _H1 and the header optical signal of the optical signal incident to each exist. Both times coincide with t3 to t4. However, since the light amount of the header portion optical signal of the optical signal incident on the optical gate 114 is larger than P1 and the header portion optical signal P2 of the optical signal incident on the optical gate 116,
The optical gate 114 switches faster than the optical gate 116 to an operating state that transmits the subsequent data portion optical signal. When the optical gate 114 shifts to this operating state, the injection current into the optical gate 114 increases, and the voltage applied to the optical gate 116 decreases due to the voltage drop due to the injection current and the resistor 300. Subsequent data part optical signals cannot be transmitted. Such an optical gate 11
Due to the differential operation of 4 and 116, only the data part optical signal of the optical packet signal A passes through the optical gate 114 and is routed to the optical waveguide 111 via the optical coupler 109.

As described above, the optical self-routing circuit shown in FIG. 3 is different from the conventional optical self-routing circuit shown in FIG. 26 in that the optical self-routing circuit shown in FIG. With this configuration, one optical packet signal can be output preferentially even if an optical packet signal collision occurs.

FIG. 5 is a diagram showing an embodiment of the third invention. The optical gates 105, 106 and 11 shown in FIGS.
4,116 operation or optical gates 107,108 and 1
This is an optical self-routing circuit for the purpose of performing operations 16 and 117 at the same time, and shows a case of four inputs and one output as an example. In FIG. 5, the optical packet signal A
To D enter the optical waveguides 500 to 503 and are sent to the optical gates 510 to 513, respectively. Optical gates 510, 51
The 1 output optical signals are combined by the optical combiner 520 and input to the optical gate 514. Output optical signals from the optical gates 512 and 513 are combined by the optical combiner 521 and input to the optical gate 515. The output optical signals of the optical gates 514 and 515 are combined by the optical combiner 522 and output from the optical waveguide 504.

The same electric pulse is applied from the electric pulse generation circuit 530 to the optical gate 510 via the resistor 540 and to the optical gate 511 via the resistors 540 and 541.
The electric pulse generation circuit 530 outputs a signal from the optical gate 512.
The same electric pulse is applied to the optical gate 513 via the resistors 542 and 543 via the resistor 542. Further, a resistor 5 is connected from the electric pulse generation circuit 530 to the optical gate 514.
Through 44, the same electrical pulse is applied to the optical gate 515 via resistors 544 and 545.

FIG. 6 is a timing chart for explaining the operation of the optical self-routing circuit of FIG.
(A) shows the voltage applied to the resistor 540, and the times t1 to t
Next V _H0 between 2 kept between V _L0 of time T2～t9.
(B) shows a voltage applied to the optical gate 510, and since the electric pulse 600 is applied via the resistor 540, the time t
V _H1 (V _H1 <V _H0 ) smaller than V _H0 during _{1 to} t2, and V _L1 (V _L1) smaller than V _L0 during time t2 to t9.
<V _L0 ). (C) shows the voltage applied to the optical gate 511, and V is smaller than V _H1 during time t1 to t2.
_H2 (V _H2 <V _H1), and the keep smaller V _L2 than even V _L1 between time T2～t9. (D) shows an electric pulse applied to the resistor 542, which is V _H0 between times t1 and t2, and maintains V _L0 between times t2 and t9. (E) shows the voltage applied to the optical gate 512. Since the voltage of (d) is applied via the resistor 542, V _H1 (V _H1 <V _H0 ) smaller than V _H0 during the time t1 to t2. next, during the time t2~t9 V _L0
V _L1 (V _L1 <V _L0 ). (F) shows the voltage applied to the optical gate 513, and (d) shows the voltage applied to the resistor 54.
2, 543, so that V _H2 (V _H2 <V _H1 ) is smaller than V _H1 between times t1 and t2.
V _L2 smaller than V _L1 is also maintained between times t2 and t9.
(G) shows the voltage applied to the resistor 544, and is between time t5 and time t5.
Next V _H0 between 6 kept between V _L0 of time T6 to T9.
(H) shows the applied voltage of the optical gate 514, and since the voltage of (g) is applied via the resistor 544, the time t5 to t5
Small V _H1 than during V _H0 of 6 (V _H1 <V _H0) next, during times t6~t9 is less than V _L0 V _L1 (V _L1 <
V _L0 ). Further, (i) indicates the applied voltage of the optical gate 515, and since the voltage of (g) is applied through the resistors 544 and 545, V _H2 (V _H2) smaller than V _H1 during the time t5 to t6. <V _H1 ), and V _L2 smaller than V _L1 is maintained between times t6 and t9. Optical gates 510-5
13, the optical packet signals A to D respectively incident on (13)
As shown in (m), the optical packet signals A, C, and D include the header portion optical signal of the light amount P1 at times t1 to t2 and t5 to t6, and the data portion optical signal at times t7 to t8. The optical packet signal B has a header part optical signal of the light amount P1 at times t3 to t4 and t5 to t6 at time t3 to t6.
The data part optical signal exists in each of 6 to t8.

Optical gate 5 on which optical packet signal A is incident
At 10, the time when the applied voltage is V _H1 and the time during which the header part optical signal is present coincide with t 1 to t 2, but the time when the applied voltage becomes V _H2 at the optical gate 511 into which the optical packet signal B is incident. And the time when the header part optical signal exists does not match. Therefore, only the header part optical signal existing at time t4 to t5 and the data part optical signal existing at time t7 to t8 of the optical packet signal A pass through the optical gate 510 and enter the optical gate 514 via the optical combiner 520. Is done. Also, optical gates 512 and 51 to which the optical packet signals C and D are respectively incident.
In 3, the time when the applied voltage is V _H1 and V _H2 respectively and the time when the header part optical signal of the optical signal incident on each is present coincide with t1 to t2. However, the light gate 51
2 is V _H1 and the applied voltage V of the optical gate 513 is
_Since it is greater than _H2 , the optical gate 512 switches faster than the optical gate 513 to an operating state that transmits the subsequent data portion optical signal. When the optical gate 512 shifts to this operating state, the injection current to the optical gate 512 increases, and the voltage drop caused by the injection current and the resistor 542 causes the optical gate 5 to lose its current.
13, the voltage applied to the optical gate 51
No. 3 cannot transmit the subsequent data part optical signal. Due to such differential operation of the optical gates 512 and 513, only the data part optical signals in the header part optical signals t7 to t8 at the times t5 to t6 of the optical packet signal C pass through the optical gate 512 and the optical coupler. Optical gate 51 via 521
5 is incident. At the optical gates 514 and 515 to which the output optical signals from the optical gates 510 and 512 are respectively incident, the time when the applied voltage is V _H1 and V _H2 , respectively, and the time when the header part optical signal of the optical signal incident to each exists. Are both t3 to t4
Matches. However, since the value of the voltage applied to the optical gate 514 is larger than the voltage V _H1 and the voltage V _H2 applied to the optical gate 515, the optical gate 514 is moved from the optical gate 515 to an operation state in which the subsequent data part optical signal is transmitted. Also switch quickly. When the optical gate 514 shifts to this operating state, the injection current to the optical gate 514 increases, and this injection current and the resistance 5
Since the voltage applied to the optical gate 515 decreases due to the voltage drop caused by the voltage 44, the optical gate 515 can no longer transmit the subsequent data signal. By the differential operation of the optical gates 514 and 515, only the data part optical signal of the optical packet signal A passes through the optical gate 514 and is routed to the optical waveguide 504 via the optical coupler 522.

As described above, in the circuit of FIG.
By using an optical gate that operates with priority according to the value of the voltage applied to the optical gate from t2 or t3 to t4, the optical gates 105, 106, 114, 114, and 114 in FIGS.
Operation of 116 or optical gates 107, 108 and 11
6, 117 operations can be realized at the same time.
One optical packet signal can be output.

FIG. 7 is a diagram showing an embodiment of the fourth invention, and also the optical gates 105 and 106 shown in FIGS.
And operation of optical gates 107 and 10
This is an optical self-routing circuit for the purpose of simultaneously performing the operations of 8 and 116, 117 in one circuit, and shows a case of four inputs and one output as an example. In FIG. 7, optical packet signals A to D are optical waveguides 500 to 50, respectively.
3 and is sent to optical gates 510-513.
The optical signals output from the optical gates 510 and 511 are output to an optical combiner 520.
And are incident on the optical gate 514. Light gate 5
The output optical signals of 12, 513 are combined by the optical combiner 521, and are incident on the optical gate 515. And the optical gate 51
The output optical signals of 4,515 are combined by an optical combiner 522,
The light is emitted from the optical waveguide 504.

FIG. 8 is a timing chart for explaining the operation of the optical self-routing circuit of FIG.
(A) shows the voltage applied to the resistor 700, and the times t1 to t
Next V _H0 between 2 kept between V _L0 of time T2～t9.
(B) shows the voltage applied to the optical gates 510 and 511;
The electric pulse (a) is applied via a resistor 700, a small V _H1 than during V _H0 time t1 to t2 (V _H1 <
V _H0 ), and keeps V _L1 (V _L1 <V _L0 ) smaller than V _L0 also from time t2 to t9. (C) shows an electric pulse applied to the resistor 701, which becomes V _H0 during the time t1 to t2,
Keep between V _L0 of time t2~t9. (D) Optical gate 51
2, 513, and the electric pulse of (c) is applied through the resistor 701, so that V _H1 (V _H1 <V _H0 ) smaller than V _H0 during the time t1 to t2, and the time t2
Between ~t9 keep small V _L1 than _{V L0 (V L1 <V L0} ). (E) shows the voltage applied to the resistor 702 at time t5
Next V _H0 between to t6, keeping between V _L0 of time T6 to T9. (F) indicates the voltage applied to the optical gates 514 and 515, the electric pulse (e) is applied via a resistor 702, a small V _H1 (V than between V _H0 times t5~t6
_H1 <V _H0) next, during times t6~t9 keep small V _L1 than _{V L0 (V L1 <V L0} ). Optical gates 510-51
3 are (g) to
As shown in (j), the optical packet signals A, C, and D include:
At times t1 to t2 and t5 to t6, the light amounts P1, P3, P
4 and a data portion optical signal between times t7 and t8, and an optical packet signal B has a time t3
At t4 and t5 to t6, there is a header part optical signal of the light amount P2, and at time t6 to t8, a data part optical signal.
The magnitudes of the light amounts P1 to P4 are set to be different from each other as P1>P2>P3> P4.

Optical gate 5 into which optical packet signal A is incident
10, the time when the applied voltage is V _H1 and the time during which the header portion optical signal is present coincide with t1 to t2. However, in the optical gate 511 to which the optical packet signal B is incident, the applied voltage is _VH1 . Does not coincide with the time when the header part optical signal exists. Therefore, the time t4 to t5 of the optical packet signal A
, And only the data part optical signal existing between times t7 and t8 passes through the optical gate 510 and enters the optical gate 514 via the optical combiner 520. Optical gates 512, on which optical packet signals C and D are respectively incident,
In 513, both the time when the applied voltage is V _H1 and V _H2 and the time when the header part optical signal of the optical signal incident on each exists at t1 to t2. However, since the light amount P3 of the header portion optical signal of the optical packet signal C is larger than the light amount P4 of the header portion optical signal of the optical packet signal D, the optical gate 512 shifts to an operation state in which the subsequent data portion optical signal is transmitted. It switches faster than the gate 513. Light gate 5
12 shifts to this operation state, the injection current to the optical gate 512 increases, and the voltage applied to the optical gate 513 decreases due to the voltage drop due to the injection current and the resistor 701. Cannot be transmitted. Such an optical gate 512
And 513, only the header part optical signal at the time t3 to t4 and the data part optical signal at the time t5 to t6 of the optical packet signal C pass through the optical gate 512 and pass through the optical combiner 521 to the optical gate. 515. Light gate 5
In the optical gates 514 and 515 to which the output optical signals from the optical signals 10 and 512 are respectively incident, the time when the applied voltage is V _H1 and the time when the header optical signal of the optical signals incident to each exist are both t3 to t4. Matches. However, light gate 5
Since the light quantity P1 of the header part optical signal of the optical signal from the optical signal 512 is larger than the light quantity P3 of the header part optical signal of the optical signal from the optical gate 512, the optical gate 514 operates to transmit the subsequent data part optical signal. It switches to the state faster than the optical gate 515. When the optical gate 514 shifts to this operation state, the injection current to the optical gate 514 increases, and the voltage applied to the optical gate 515 decreases due to the voltage drop due to the injection current and the resistor 702. Cannot be transmitted. By the differential operation of the optical gates 514 and 515, only the data part optical signal of the optical packet signal A passes through the optical gate 514 and is routed to the optical waveguide 504 via the optical coupler 522.

As described above, in the circuit shown in FIG. 7, the optical gates 105 and 106 shown in FIGS. , 114 and 116 or the operations of the optical gates 107 and 108 and 116 and 117 can be realized at the same time. Can be output.

FIG. 9 is a view showing a fifth embodiment of the present invention, which also shows the optical gates 105, 106 and 11 shown in FIGS.
4,116 operation or optical gates 107,108 and 1
This is an optical self-routing circuit that performs operations 16 and 117 simultaneously, and shows a case of four inputs and one output as an example.
In FIG. 9, the optical packet signals A to D respectively correspond to the optical waveguides 9.
The light is incident on 00 to 903 and transmitted to optical gates 910 to 913. Output optical signals from the optical gates 910 to 913 are combined by the optical combiner 920 and output from the optical waveguide 904. The electric pulse generation circuit 930 and the optical gate 910 are connected via a resistor 940.
Resistors 941, 942, 943 are connected between the optical gates 1, 911, 912, 912, and 913.

FIG. 10 is a timing chart for explaining the operation of the optical self-routing circuit of FIG. (A) shows the voltage applied to the resistor 940, at time t1.
Next V _H0 between -t2, keeping between V _L0 of time T2 to T7. (B) to (e) show voltages applied to the optical gates 910 to 913, respectively.
V _H1 , V _H2 , V _H3 ,
And V _H4 (V _H1 > V _H2 > V _H3 > V _H4 > V _L0 ),
During the period from t2 to t7, V _L1 , V _L2 , V _L3 , V _L4 (V _L1 > V
_L2 > _VL3 > _VL4 ). Optical gates 910, 912, 9
The optical packet signals A, C, and D respectively incident on the optical signal 13 are:
As shown in (f), (h) and (i), time t1 to t2
At the time t5.
At t6, the data part optical signal exists.

As shown in (f), the optical packet signal B incident on the optical gate 911 has a header part optical signal between times t3 and t4 and a data part optical signal between times t5 and t6. In the optical gates 910, 912, and 913 to which the optical packet signals A, C, and D are respectively incident, the time when the applied voltage is V _H1 , V _H3 , and V _H4 , respectively, and the optical packet signals A, C, and
The time during which the optical signal of the header portion of D exists is equal to t1 to t2, but the optical gate 911 to which the optical packet signal B is incident.
In this case, the time when the applied voltage is V _H2 does not coincide with the time when the optical signal of the header of the optical packet signal B exists. Further, the voltage V _H1 applied to the optical gate 910 is different from that of the other optical gates 91.
2, 913 because it is larger than the applied voltage V _H3 , V _H4 .
The optical gate 910 switches to an operation state in which the subsequent data part optical signal is transmitted faster than the other optical gates 912 and 913. When the optical gate 910 shifts to this operation state, the injection current to the optical gate 910 increases, and this injection current and the resistance 9
40 and the optical gates 912-913
Is reduced, the remaining optical gate 91 no longer exists.
No. 2,913 cannot transmit the subsequent data part optical signal. By the operation of the optical gates 910 to 913, only the data part optical signal of the optical packet signal A passes through the optical gate 910 and passes through the optical coupler 920 to the optical waveguide 9.
04 is self-routed.

As described above, the circuit shown in FIG.
By using an optical gate that operates with priority according to the magnitude of the applied voltage of
Operation of 106 and 114, 116 or optical gate 10
7, 108 and 116, 117 can be realized at the same time, and even if an optical packet signal collision occurs between four inputs and one output, one optical packet signal can be output preferentially.

FIG. 11 is a diagram showing an embodiment of the sixth invention, which is also the optical gates 105, 106 and 1 shown in FIGS.
An optical self-routing circuit that simultaneously performs the operations of the optical gates 14 and 116 or the optical gates 107 and 108 and the channels 116 and 117, and shows a case of four inputs and one output as an example. In FIG. 11, optical packet signals A to D enter optical waveguides 900 to 903, respectively, and optical gates 910 to 91 are provided.
3 is sent. Output optical signals from the optical gates 910 to 913 are combined by the optical combiner 920 and output from the optical waveguide 904. Electric pulse generation circuit 930 and optical gate 9
10, 911, 912, and 913 are connected via a resistor 1100.

FIG. 12 is a timing chart for explaining the operation of the optical self-routing circuit of FIG. (A) shows the voltage applied to the resistor 1100 at time t.
It becomes V _{H0 from 1 to} t2, and maintains V _L0 from time t2 to t7. (B) shows a voltage applied to the optical gates 910 to 913.
_H1 (V _H1 <V _H0 ), and V _L1 (V
_L1 <V _L0 ) is maintained. The optical packet signals A, C, and D respectively incident on the optical gates 910, 912, and 913 are (c),
As shown in (e) and (f), at times t1 and t2, the header portion optical signals whose light amounts are P1, P3 and P4 (P1>P3> P4), respectively, and at times t5 and t6 the data portion optical signals. Exists. As shown in (d), the optical packet signal B incident on the optical gate 911 has a header part optical signal between times t3 and t4 and a data part optical signal between times t5 and t6. In the optical gates 910, 912, and 913 to which the optical packet signals A, C, and D are respectively incident, the time when the applied voltage is V _H1 and the time when the optical signals of the headers of the optical packet signals A, C, and D exist are different. The applied voltage is V _H1 at the optical gate 911 to which the optical packet signal B is incident, which coincides with t1 to t2.
Does not coincide with the time at which the header part optical signal of the optical packet signal B exists. Further, since the light quantity P1 of the header part optical signal of the optical packet signal A is larger than the light quantity P3, P4 of the header part optical signal of the optical packet signals C and D, the optical gate 910 transmits the subsequent data part optical signal. It switches to the operating state faster than the other optical gates 912, 913.
When the optical gate 910 moves to this operating state, the optical gate 91
0, the injection current and the resistance 1100
Since the voltage applied to the optical gates 912 to 913 decreases due to the voltage drop due to
913 cannot transmit the subsequent data part optical signal. By the operation of the optical gates 910 to 913, only the data part optical signal of the optical packet signal A passes through the optical gate 910 and passes through the optical coupler 920 to the optical waveguide 904.
Perform self-routing to

As described above, also in the circuit of FIG. 11, the optical gates 105 and 106 shown in FIGS. The operation of 114, 116 or the operation of optical gates 107, 108 and 116, 117 can be realized simultaneously, and one optical packet signal is output preferentially even if an optical packet signal collision occurs between four inputs and one output. can do.

FIG. 13 is a diagram showing an embodiment of the seventh invention. Even if a collision of an optical packet signal occurs between a plurality of inputs and outputs, one of the optical packet signals which has been preferentially collided. This is an optical self-routing circuit in which a plurality of circuits of the second embodiment of FIG. 4 are combined for the purpose of self-routing a packet signal. As an example, a 4-input, 2-input circuit using two circuits shown in FIG. The output case is shown. The optical packet signals A to D input to the optical waveguides 1300 to 1303 are output from the optical splitters 1310 to 1313 respectively.
Optical gates 1320, 1324 and 132
1,1325 and 1322,1326, and 1323,
1327. Optical gates 1320 and 1321,
Output optical signals of 1322 and 1323 are respectively connected to an optical combiner 133.
The light beams are merged at 0,1331 and are incident on optical gates 1040,1041. The output optical signals of the optical gates 1024 and 1325, 1326 and 1327 are respectively connected to optical combiners 1332 and 1332, respectively.
The light beams are merged at 33 and incident on optical gates 1342 and 1343. The output optical signals of the optical gates 1340 and 1341 are
The light is output from the optical waveguide 1304 via the optical coupler 1334, and the output optical signals from the optical gates 1342 and 1343 are output from the optical waveguide 1305 via the optical coupler 1335.

Electric pulse generation circuit 1350 and optical gate 1
Each of 320, 1322 is connected via a resistor 1360, 1362, and optical gates 1320 and 1321, 1
A resistor 1361,1 is provided between each of the optical gates 322 and 1323.
363 are connected. Electric pulse generation circuit 1350
And optical gates 1324, 1326 are connected to resistors 1370, 13
72, and optical gates 1324 and 132
A resistor 137 is provided between each of the optical gates 5, 1326 and 1327.
1, 1373 are connected. Further, the electric pulse generation circuit 1350 and the optical gate 1340 are connected via a resistor 1380, and a resistor 1381 is connected between the optical gates 1340 and 1341. Further, the electric pulse generation circuit 1350 and the optical gate 1342 are connected via a resistor 1390, and a resistor 1391 is connected between the optical gates 1342 and 1343.

FIGS. 14 to 16 are timing charts for explaining the operation of the optical self-routing circuit of FIG. (A) shows an electric pulse applied to the resistor 1360, which becomes V _H0 during the time t1 to t2,
V _L0 is maintained for 11 hours. (B) shows the voltage applied to the optical gate 1320. Since the electric pulse shown in (a) is applied through the resistor 1360, V _H1 (V _H1 <V _H0) smaller than V _H0 during the time t1 to t2. ), And keeps V _L1 (V _L1 <V _L0 ) smaller than V _L0 from time t2 to t11. (C)
Indicates the voltage applied to the optical gate 1321, and indicates the electric pulse 14
Since 00 is applied via a resistor 1360,1361, smaller than during V _H1 times t1 to t2 V
_H2 (V _H2 <V _H1 ), and V _{L1 is} also maintained between time t2 and t11.
Keep V _L2 smaller than (D) shows an electric pulse applied to the resistor 1362, which becomes V _H0 during the time t1 to t2,
Keep between V _L0 of time t2~t11. (E) Optical gate 1
322 indicates a voltage applied to the resistor 1362,
Since applied through a small _{V H1 (V H1 <V H0} ) than between V _H0 times t1~t2 next, during t2~t11 is less than _{V L0 V L1 (V L1 <} V L0) Keep. (F)
Indicates a voltage applied to the optical gate 1323, and since the electric pulse of (d) is applied through the resistors 1362 and 1363, V is smaller than V _H1 from time t1 to t2.
_H2 (V _H2 <V _H1 ), and V _{L1 is} also maintained between time t2 and t11.
Keep V _L2 smaller than (G) shows an electric pulse applied to the resistor 1370, which becomes V _H0 during the time t3 to t4,
Keep between V _L0 of time t4~t10. (H) Optical gate 1
324, and the electric pulse (g) is applied through the resistor 1370, so that V _H1 (V _H1 <V _H0 ) smaller than V _H0 during the time t3 to t4, and t4 to t4
During _V11 , V _L1 smaller than V _L0 (V _L1 <V _L0 ) is maintained. (I) shows the voltage applied to the optical gate 1325,
The electric pulse (g) is applied via a resistor 1370,1371, smaller _{V H2 (<V H1 V H2} ) than between V _H1 times t3~t4 next, even during the time T4～t11 V Keep V _L2 smaller than _L1 . (J) is a resistor 13
72 shows an applied electric pulse to the V. 72, and V
_It becomes _H0 and keeps V _L0 from time t4 to t11. (K) indicates a voltage applied to the optical gate 1326, and since the electric pulse of (j) is applied via the resistor 1372, time (t3)
Less than between V _H0 of _{~t4 V H1 (V H1 <V} H0) next, during time t4~t11 is less than V _L0 V _L1 (V
_L1 <V _L0 ) is maintained. (L) shows the application to the optical gate 1327, and the electric pulse of (j) shows the resistance 1372, 1373
Since applied via a smaller _{V H2 (V H2 <V H1} ) than between V _H1 times t3~t4 next, T4～t1
V _L2, which is smaller than V _L1, is also maintained during one. (M) is resistance 1
An electric pulse applied to 380 is shown, which is V _H0 between times t5 and t6, and maintains V _L0 between times t6 and T11. (N)
Indicates an applied voltage to the optical gate 1340. Since the electric pulse of (m) is applied through the resistor 1380, the time t
V _H1 (V _H1 <V _H0 ) smaller than V _H0 during the period from 5 to t6, and V _L1 (V V1) smaller than V _L0 from the time t6 to t11.
_L1 <V _L0 ) is maintained. (O) is an optical gate 1341
And the electric pulse of (m) is the resistance 138
0, 1381, the time t5 to t6
During this period, V _H2 becomes smaller than V _H1 (V _H2 <V _H1 ), and V _L2 smaller than V _L1 is maintained from time t6 to t11. (P) indicates the voltage applied to the resistor 1390, and the time t
It becomes V _H0 during 7 to t8, and maintains V _L0 during time t8 to t11. (G) shows the voltage applied to the optical gate 1342,
Since the electric pulse of (p) is applied through the resistor 1390, V _H1 (V _H1) smaller than V _H0 during the time t7 to t8.
<V _H0 ), and maintains V _L1 (V _L1 <V _L0 ) smaller than V _L0 during the period from t8 to t11. Further, (r) shows the voltage applied to the optical gate 1343, and since the electric pulse of (p) is applied through the resistors 1390 and 1391, the time t
Smaller V _H2 (V _H2 than between V _H1 of 7～T8 <
V _H1 ), and keeps V _L2 smaller than V _L1 between times t8 and t11. Optical gates 1320, 1324, 1322
The optical packet signals A and C respectively incident on and 1326 are
As shown in (s) and (u) of FIG. 16, a header portion optical signal having a light quantity of P1 exists at times t1 to t2 and t4 to t5, and a data portion optical signal exists at times t9 to t10. The optical packet signals B and D incident on the optical gates 1321 and 1325 and 1323 and 1327 respectively are shown in FIG.
As shown in (v), a header part optical signal of the light amount P1 exists between times t3 and t4, and a data part optical signal exists between times t9 and t10.

The optical gate 1 to which the optical packet signal A is incident
At 320, the time at which the applied voltage is V _H1 coincides with the time at which the header part optical signal of the optical packet signal A is present, from t1 to t2, but the optical gate 1 to which the optical packet signal B is incident.
In 321, the time when the applied voltage is V _H2 does not match the time when the optical signal of the header of the optical packet signal B exists. Therefore, only the header part optical signal at time t5 to t6 and the data part optical signal at time t9 to t10 of the optical packet signal A pass through the optical gate 1320 and pass through the optical combiner 1330 to the optical gate 13
40.

Optical gate 1 on which optical packet signal C is incident
At 322, the time at which the applied voltage is V _H1 and the time at which the header part optical signal of the optical packet signal C is present coincide with t1 to t2, but the optical gate 13 to which the optical packet signal D is incident.
In 23, the time when the applied voltage is V _H2 does not coincide with the time when the optical signal in the header of the optical packet signal D exists. Therefore, only the optical signal in the header portion of the optical packet signal C at times t5 to t6 and the optical signal in the data portion at times t9 to t10 are the optical gate 1
322 and the optical gate 134 via the optical combiner 1331
1 is incident.

Optical gate 1 on which optical packet signal A is incident
In 324, the time when the applied voltage is V _H1 does not match the time when the header part optical signal of the optical packet signal A exists,
In the optical gate 1325 where the optical packet signal B is incident,
The time when the applied voltage is V _H2 and the time when the optical signal of the header of the optical packet signal B exists coincide with t3 to t4. Therefore, only the optical signal in the header portion between times t7 and t8 of the optical packet signal B and the optical signal in the data portion between times t9 and t10 are the optical gate 1
325 and the optical gate 134 via the optical combiner 1332
2 is incident.

Optical gate 1 on which optical packet signal C is incident
At 326, the time when the applied voltage is V _H1 does not match the time when the header part optical signal of the optical packet signal C exists,
In the optical gate 1327 to which the optical packet signal D is incident,
The time when the applied voltage is V _H2 and the time when the optical signal of the header of the optical packet signal D exists coincide with t3 to t4. Therefore, only the optical signal in the header portion of the optical packet signal D between times t7 and t8 and the optical signal in the data portion between times t9 and t10 are the optical gate 1
327, the optical gate 134 via the optical combiner 1333.
3 is incident.

In the optical gates 1340 and 1341 to which the output optical signals from the optical gates 1320 and 1322 are respectively incident, the time when the applied voltage is V _H1 and V _H2 , respectively, and the header part optical signal of the optical signal which is incident on each. Are present at both times
5 to t6. However, the value of the voltage applied to the optical gate 1340 is V _H1 and the voltage V applied to the optical gate 1341 is
_Since it is greater than _H2 , the optical gate 1340 switches to an operating state that transmits the subsequent data part optical signal faster than the optical gate 1341. When the optical gate 1340 shifts to this operation state, the injection current to the optical gate 1340 increases, and the voltage applied to the optical gate 1341 further decreases due to the voltage drop due to the injection current and the resistor 1380. Cannot transmit the subsequent data part optical signal. Such optical gates 1340, 134
1, only the data portion optical signal of the optical packet signal A passes through the optical gate 1340 and passes through the optical multiplexer 133
4 to an optical waveguide 1304.

At the optical gates 1342 and 1343 to which the output optical signals from the optical gates 1325 and 1327 are respectively incident, the time when the applied voltage is V _H1 and V _H2 , respectively, and the header part optical signal of the optical signal incident upon each Are present at both times
7 to t8. However, since the value of the voltage applied to the optical gate 1342 is larger than the voltage V _H1 and the voltage V _H2 applied to the optical gate 1343, the optical gate 1342 is shifted from the optical gate 1343 to an operation state in which the data part optical signal is transmitted thereafter. Switch fast. When the optical gate 1342 shifts to this operation state, the injection current to the optical gate 1342 increases, and the voltage applied to the optical gate 1343 decreases due to the voltage drop due to the injection current and the resistor 1390. Cannot be transmitted. Due to such differential operation of the optical gates 1342 and 1343, only the data part optical signal of the optical packet signal C passes through the optical gate 1342 and is routed to the optical waveguide 1305 via the optical coupler 1335.

As described above, in the circuit of FIG.
By using an optical gate that operates with priority according to the magnitude of the resistance applied voltage between t2 and t5 to t6 or t3 to t4 and t7 to t8, priority is given even when an optical packet signal collision occurs between four inputs and two outputs. Thus, one optical packet signal can be output.

FIG. 17 is a diagram showing an embodiment of the eighth invention. Even if a collision of an optical packet signal occurs between a plurality of inputs and outputs, one of the optical packet signals which preferentially collided. An optical self-routing circuit in which a plurality of circuits of the third embodiment of FIG. 7 are combined for the purpose of self-routing an optical packet signal. As an example, a four-input circuit using two circuits shown in FIG. The case of two outputs is shown. The optical packet signals A to D input to the optical waveguides 1300 to 1303 are respectively supplied to the optical splitters 1310 to 1313.
And the optical gates 1320, 1324 and 13
21, 1325 and 1322, 1326, and 132
3,1327. Optical gates 1320 and 132
The output optical signals of 1, 1322 and 1323 are respectively optical multiplexer 1
Optical gates 1040 and 104 merged at 330 and 1331
1 is incident. Optical gates 1024 and 1325, 132
6 and 1327 are output from the optical combiner 1332,
They are merged at 1333 and incident on optical gates 1342, 1343. Output optical signals of the optical gates 1340 and 1341 are output from the optical waveguide 1304 via the optical coupler 1334, and output optical signals of the optical gates 1342 and 1343 are output from the optical waveguide 1305 via the optical coupler 1335.
Electric pulse generation circuit 1350 and optical gates 1320 to 13
21, a resistor 1500 is connected, and between the electric pulse generation circuit 1350 and the optical gates 1322 and 1323, a resistor 1501 is connected. A resistor 1510 is connected between the electric pulse generation circuit 1350 and the optical gates 1324-1325.
A resistor 1511 is connected between the optical gates 1326 and 1327. A resistor 1520 is connected between the electric pulse generation circuit 1350 and the optical gates 1340 to 1341. Further, a resistor 1530 is connected between the electric pulse generation circuit 1350 and the optical gates 1342-1343.

FIGS. 18 to 20 are timing charts for explaining the operation of the optical self-routing circuit of FIG. (A) shows an electric pulse applied to the resistor 1500, which becomes V _H0 during the time t1 to t2,
V _L0 is maintained for 11 hours. (B) shows the voltage applied to the optical gates 1320 to 1321 of the resistor 1500. Since the electric pulse of (a) is applied via the resistor 1500, the time t
V _H1 (V _H1 <V _H0 ) smaller than V _H0 between _{1 and} t2, and V _L1 (V _L1 smaller than V _L0 between times t2 and t11.
_L1 <V _L0 ) is maintained. (C) shows the voltage applied to the resistor 1501, which is V _H0 during the time t1 to t2,
V _L0 is maintained for 11 hours. (D) is an optical gate 1322 to 13
23 shows the voltage applied to the resistor 23, and the electric pulse shown in FIG.
Since the voltage is applied through the line 501, the voltage V
Less than _{H0 V H1 (V H1 <V} H0) , and the time t2~
between t11 keep small V _L1 than _{V L0 (V L1 <V L0} ). (E) shows an electric pulse applied to the resistor 1510,
It becomes V _H0 during time t3 to t4, and maintains V _L0 during time t4 to t10. (F) indicates a voltage applied to the optical gates 1324,1325, the electrical pulse (e) is applied via a resistor 1510, less than between V _H0 times t3~t4 V _H1 (V _H1 < V _H0) next, during time t4~t11 keep small V _L1 than _{V L0 (V L1 <V L0} ).
(G) shows the voltage applied to the resistor 1511, from time t3 to time t3.
It becomes V _H0 during t4, and maintains V _L0 from time t4 to t11. (H) shows the voltage applied to the optical gates 1326 and 1327. Since the electric pulse shown in (g) is applied via the resistor 1511, V _H1 smaller than V _H0 during the time t3 to t4.
(V _H1 <V _H0 ), and V _L1 (V _L1 <V _L0 ) smaller than V _L0 is maintained between times t4 and t11. (I) is a resistor 1
520 indicates an applied electric pulse, which is V _H0 between times t5 and t6, and maintains V _L0 between times t6 and t11. (J)
Indicates a voltage applied to the optical gates 1340 and 1341;
Since the electric pulse of (i) is applied through the resistor 1520, V _H1 (V _H1) smaller than V _H0 during the time t5 to t6.
<V _H0 ), and maintains V _L1 (V _L1 <V _L0 ) smaller than V _L0 from time t6 to t11. Further, (k) indicates a resistor 15
30 shows an applied electric pulse to V.30, and between time t7 and t8, V
_H0 next, during time t8~t11 keep V _L0. (L)
Indicates the voltage applied to the optical gates 1342, 1343,
Since the electric pulse of (k) is applied through the resistor 1530, V _H1 (V _H1) smaller than V _H0 during the time t7 to t8.
<V _H0 ), and maintains V _L1 (V _L1 <V _L0 ) smaller than V _L0 from time t8 to t11.

The optical packet signals A and C incident on the optical gates 1320 and 1324 and 1322 and 1326 respectively have light amounts at times t1 to t2 and t4 to t5 as shown in (m) and (o) of FIG. The header part optical signals of P1 and P3 respectively exist, and the data part optical signal exists from time t9 to t10. Also, optical gates 1321 and 1325, 1323 and 13
The optical packet signals B and D incident on the optical signal 27 respectively are shown in FIG.
As shown in (n) and (p), the header part optical signals having the light amounts of P2 and P4 respectively exist from time t3 to t4, and from time t9 to t4.
At 10 there is a data part optical signal. The values of the light amounts P1 to P4 are set to be different from each other as P1>P2>P3> P4.

Optical gate 1 on which optical packet signal A is incident
At 320, the time at which the applied voltage is V _H1 coincides with the time at which the header part optical signal of the optical packet signal A is present, from t1 to t2, but the optical gate 1 to which the optical packet signal B is incident.
In 321, the time when the applied voltage is V _H1 does not coincide with the time when the optical signal of the header of the optical packet signal B exists. Therefore, only the header part optical signal at time t5 to t6 and the data part optical signal at time t9 to t10 of the optical packet signal A pass through the optical gate 1320 and pass through the optical combiner 1330 to the optical gate 13
40.

Optical gate 1 on which optical packet signal C is incident
At 322, the time at which the applied voltage is V _H1 and the time at which the header portion optical signal of the optical packet signal C is present coincide with t1 to t2, but the optical gate 1 to which the optical packet signal D is incident.
In H.323, the time when the applied voltage is V _H1 does not coincide with the time when the header part optical signal of the optical packet signal D exists. Therefore, only the header part optical signal at time t5 to t6 and the data part optical signal at time t9 to t10 of the optical packet signal C pass through the optical gate 1322 and pass through the optical combiner 1331 to the optical gate 13.
It is incident on 41.

Optical gate 1 on which optical packet signal A is incident
In 324, the time the applied voltage is V _H1, but the time that the header section optical signal of the optical packet signal A is present do not match, the optical gate 1325 is an optical packet signal B is incident, the applied voltage is at V _H1 A certain time and a time when the optical signal of the header part of the optical packet signal B exists coincide with t3 to t4.
Therefore, only the header part optical signal of the optical packet signal B at time t7 to t8 and the data part optical signal at time t9 to t10 pass through the optical gate 1325 and pass through the optical combiner 1322 to the optical gate 1
342.

Optical gate 1 on which optical packet signal C is incident
At 326, the time when the applied voltage is V _H1 does not match the time when the header part optical signal of the optical packet signal C exists,
In the optical gate 1327 to which the optical packet signal D is incident,
The time when the applied voltage is V _H1 and the time when the optical signal of the header portion of the optical packet signal D exists coincide with t3 to t4. Therefore, only the optical signal in the header portion of the optical packet signal D between times t7 and t8 and the optical signal in the data portion between times t9 and t10 are the optical gate 1
327, the optical gate 134 via the optical combiner 1333.
3 is incident.

In the optical gates 1340 and 1341 to which the output optical signals from the optical gates 1320 and 1322 are respectively incident, the time when the applied voltage is V _H1 and the time when the header part optical signal of the optical signal incident on each is present Coincide with t5 to t6. However, since the light quantity P1 of the header part optical signal of the optical signal from the optical gate 1320 is larger than the light quantity P3 of the header part optical signal of the optical signal from the optical gate 1322, the optical gate 1340 sets the subsequent data part optical signal to It switches to a transmitting operating state faster than the optical gate 1341. When the optical gate 1340 shifts to this operating state, the injection current into the optical gate 1340 increases, and the voltage drop caused by the injection current and the resistor 1380 causes the optical gate 1341 to move.
The voltage applied to the optical gate 1341
Cannot transmit the subsequent data part optical signal.
By the differential operation of the optical gates 1340 and 1341, only the data part optical signal of the optical packet signal A passes through the optical gate 1340 and is routed to the optical waveguide 1304 via the optical coupler 1334.

At the optical gates 1342 and 1343, to which the output optical signals from the optical gates 1325 and 1327 are respectively incident, the time when the applied voltage is V _H1 and V _H2 , respectively, and the header part optical signal of the optical signal which is incident on each of them. Are present at both times
7 to t8. However, the light amount P2 of the optical signal in the header portion of the optical signal from the optical gate 1325 is
Since the light amount of the optical signal from the header portion 27 is larger than the light amount P4 of the optical signal from the header portion, the optical gate 1342 switches to an operation state in which the optical signal of the subsequent data portion is transmitted faster than the optical gate 1342. When the optical gate 1342 shifts to this operation state, the injection current to the optical gate 1342 increases, and the voltage drop by the injection current and the resistor 1530 causes the optical gate 1342 to drop.
3, the voltage applied to the optical gate 1343 is no longer
Cannot transmit the subsequent data part optical signal.
Due to such differential operation of the optical gates 1342 and 1343, only the data part optical signal of the optical packet signal C passes through the optical gate 1342 and is routed to the optical waveguide 1305 via the optical coupler 1335.

As described above, in the circuit of FIG.
Even if a collision of an optical packet signal occurs between four inputs and two outputs by using an optical gate that operates with priority according to the magnitude of the light amount of the header part optical signal at t2 and t5 to t6 or t3 to t4 and t7 to t8. One optical packet signal can be output preferentially.

FIG. 21 is a diagram showing an embodiment of the ninth invention. Even if a collision of an optical packet signal occurs between a plurality of inputs and outputs, one of the optical packet signals having a preferential collision occurs. This is an optical self-routing circuit in which a plurality of circuits of the fourth embodiment of FIG. 9 are combined for the purpose of self-routing one optical packet signal. As an example, a four-input circuit using two circuits shown in FIG. The case of two outputs is shown. The optical packet signals A to D input to the optical waveguides 1700 to 1703 are respectively connected to the optical splitters 1710 to 1713.
And the optical gates 1720, 1724 and 17
21, 1725 and 1722, 1726 and 1723,
It is incident on 1727. The optical signals output from the optical gates 1720 to 1723 are transmitted to the optical waveguide 170 via the optical coupler 1730.
4 is output. Output optical signals from the optical gates 1724 to 1727 are output from the optical waveguide 1705 via the optical coupler 1731.

Electric pulse generation circuit 1740 and optical gate 1
Reference numeral 720 is connected via a resistor 1750, and resistors 1751, 1752, and 1721 are connected between the optical gates 1720 and 1721, 1721 and 1722, 1722 and 1723, respectively.
1753 is connected. Electric pulse generation circuit 174
0 and the optical gate 1724 are connected via a resistor 1760, and the optical gates 1724 and 1725, 1725 and 17
26, 1726 and 1727, a resistor 17 is provided between the respective optical gates.
61, 1762, and 1763 are connected.

FIGS. 22 and 23 are timing charts for explaining the operation of the optical self-routing circuit of FIG. (A) shows an electric pulse applied to the resistor 1750, which becomes V _H0 during the time t1 to t2, and becomes a time t2 to t6.
During this period, V _L0 is maintained. (B) to (e) show optical gates 172, respectively.
0 to 1723, and resistors 1750 to 1723
53, V _H1 , V _H2 , V _H3 , V _H4 (V _H0 > V _H1 > V _H2 > V _H3 > V _H that are smaller than V _H0 during the time t1 to t2.
_H4 ), and between time t2 and t6, V is smaller than V _L0.
L1 , V _L2 , V _L3 , V _L4 (V _L0 > V _L1 > V _L2 > V _L3 >
_VL4 ). (F) shows the voltage applied to the resistor 1760, which is V _H0 between times t2 and t3, and maintains V _L0 between times t3 and t6. (G) to (j) show optical gates 1724, respectively.
To 1727, and resistors 1760 to 1763
Between time t1 and t2, V _H1 smaller than V _H0 ,
V _H2 , V _H3 , V _H4 (V _H0 > V _H1 > V _H2 > V _H3 > V _H4 ), and V _L1 , V smaller than V _L0 during the time t3 to t6.
_L2 , _VL3 , _VL4 ( _VL0 > _VL1 > _VL2 > _VL3 > _VL4 ) are maintained.

The optical packet signals A and C incident on the optical gates 1720 and 1724 and 1722 and 1726 respectively are shown in FIG.
As shown in FIGS. 3 (k) and 3 (m), there is a header part optical signal having a light amount P1 between times t1 and t2, and a data part optical signal between times t4 and t5. Also, optical gates 1721 and 172
The optical packet signals B and D which are respectively incident on the optical packets 5, 1723 and 1727 are at time t2 as shown in FIGS.
From time t4 to time t4, there is a header portion light signal of the light amount P1.
The data part optical signal is present at t5.

At the optical gates 1720 to 1723 to which the optical packet signals A to D are respectively incident, the optical packet signals A and C
And the time when the optical signal of each header part
The time during which the applied voltages of 720 and 1722 become V _H1 and V _H3 respectively matches t1 and t2, the time during which the respective header part optical signals of the optical packet signals B and D exist, and the optical gate 172.
The times when the additional voltages of 1,1722 become V _H2 and V _H4 respectively do not coincide. Therefore, the optical gates 1721, 1723
Does not allow the input optical signal to pass. Further, since the applied voltage V _H1 of the optical gate 1720 at the time t1 to t2 is higher than the applied voltage V _H3 of the optical gate 1722, the optical gate 1720 is faster than the optical gate 1722 to the operation state of transmitting the subsequent data signal. Switch. Optical gate 1
When 720 shifts to this operation state, the injection current to optical gate 1720 increases, and the voltage applied to optical gate 1722 decreases due to the voltage drop due to this injection current and resistor 1750, so that optical gate 1722 is no longer used. The data part optical signal cannot be transmitted. As described above, only the data part optical signal of the optical packet signal A is transmitted to the optical gate 172.
0 through the optical coupler 1730 and the optical waveguide 170
4 is self-routed.

At the optical gates 1724 to 1727 to which the optical packet signals A to D are respectively incident, the time during which the header optical signals of the optical packet signals B and D are present and the voltage applied to the optical gates 1725 and 1727 are reduced. The time during which V _H2 and V _H4 are respectively equal to t2 and t3, the time during which the header portion optical signals of the optical packet signals A and C are present, and the optical gate 17
The times when the additional voltages of 24 and 1726 become V _H2 and V _H4 respectively do not coincide. Further, the time t2 to t of the optical gate 1725
Since the applied voltage V _{H2 at} 3 is higher than the applied voltage V _H4 of the optical gate 1727, the optical gate 1725 switches to an operation state in which the subsequent data part optical signal is transmitted faster than the optical gate 1727. When the optical gate 1725 moves to this operating state, the injection current to the optical gate 1725 increases, and the voltage applied to the optical gate 1727 decreases due to the voltage drop due to the injection current and the resistor 1760. Subsequent data part optical signals cannot be transmitted. By the above operation, only the data part optical signal of the optical packet signal A passes through the optical gate 1720 and is self-routed to the optical waveguide 1704 via the optical coupler 1730.

As described above, the optical self-routing circuit shown in FIG. 21 performs self-routing of an optical packet signal between a plurality of inputs and outputs, even if a collision of a plurality of optical packet signals occurs. Or t2-t
It is possible to output one optical packet signal with priority according to the value of the optical gate applied voltage of No. 3.

FIG. 24 is a diagram showing an embodiment of the tenth aspect of the present invention. Even if a collision of an optical packet signal occurs between a plurality of inputs and outputs, one of the optical packet signals having a preferential collision occurs. This is an optical self-routing circuit in which a plurality of circuits of the fifth embodiment of FIG. 11 are combined for the purpose of self-routing one optical packet signal. As an example, a four-input circuit using two circuits shown in FIG. The case of two outputs is shown. The optical packet signals A to D input to the optical waveguides 1700 to 1703 are respectively separated from the optical splitters 1710 to 1710.
The optical gates 1720, 1724 are divided into two at 713.
And 1721, 1725 and 1722, 1726 and 17
23, 1727. Optical gates 1720-17
The output optical signal of 23 is output from the optical waveguide 1704 via the optical coupler 1730. Optical gates 1724 to 1727
Is output from the optical waveguide 17 via the optical combiner 1731.
05.

The output optical signals from the optical gates 1724 to 1727 are output from the optical waveguide 1705 via the optical coupler 1731.

Electric pulse generation circuit 1740 and optical gate 1
720 to 1723 are connected via a resistor 1900.
Electric pulse generation circuit 1740 and optical gates 1724-17
27 is connected via a resistor 1910.

FIG. 25 is a timing chart for explaining the operation of the optical self-routing circuit of FIG. (A) shows the voltage applied to the resistor 1900 at time t.
It becomes V _H0 during 1 to t2, and maintains V _L0 during time t2 to t6. (B) shows a voltage applied to the optical gates 1720 to 1723, and V _H0 is applied by the resistor 1900 between time t1 and t2.
Small V _H1 becomes than during times t2~t6 keep small V _L1 than V _L0. (C) shows the voltage applied to the resistor 1910, which becomes V _H0 during the time t2 to t3,
Keep between V _L0 of ~t6. (D) Each of the optical gates 1724
The voltage applied is from 1 to 1727. The resistance 1910 keeps V _H1 smaller than V _H0 during the time t1 to t2, and maintains V _L1 smaller than V _L0 during the time t3 to t6.

The optical packet signals A and C incident on the optical gates 1720 and 1724 and 1722 and 1726 respectively have light amounts P1 and P3 (P1> P3) from time t1 to t2 as shown in FIGS. ), And a data part optical signal exists between time t4 and time t5. The optical packet signals B and D incident on the optical gates 1721 and 1725 and 1723 and 1727 respectively are light amounts P2 and P4 (P2
> P4), and a data part optical signal exists from time t4 to time t5.

At the optical gates 1720 to 1723 to which the optical packet signals A to D are respectively incident, the optical packet signals A and C
And the time when the optical signal of each header part
The time at which the applied voltages of 720 and 1722 each become V _H1 is t
1 to t2, the time during which the header part optical signal of each of the optical packet signals B and D exists, and the optical gates 1721 and 172
The times when the applied voltages of _V.22 and _V.sub.22 reach V.sub.H1 do not match. Further, since the light amount P1 of the header portion optical signal of the optical packet signal A at times t1 to t2 is larger than the light amount P3 of the header portion optical signal of the optical packet signal C, the optical gate 1720 transmits the subsequent data portion optical signal. Optical gate 1 to operating state
Switch faster than 722. When the optical gate 1720 shifts to this operation state, the injection current to the optical gate 1720 increases, and the voltage applied to the optical gate 1722 decreases due to the voltage drop due to the injection current and the resistor 1900. Subsequent data part optical signals cannot be transmitted. As described above, the optical packet signal A
Only the data signal of the data part passes through the optical gate 1720,
Self-routed to the optical waveguide 1704 via the optical coupler 1730.

In the optical gates 1724 to 1727 to which the optical packet signals A to D are respectively incident, the time during which the header optical signal of each of the optical packet signals B and D exists, and the voltage applied to the optical gates 1725 and 1727 there was consistent with time as the V _H1 is t2 to t3, time and each of the header portions optical signal of the optical packet signals a and C are present, optical gate 1724,1
The time when the applied voltage of 726 becomes V _H1 does not match. Further, since the light amount P2 of the header part optical signal at time t2 to t3 of the optical packet signal B is larger than the light amount P4 of the header part optical signal of the optical packet signal D, the optical gate 1725 operates to transmit the subsequent data part optical signal. Light gate 1727
Switch faster. When the optical gate 1725 moves to this operation state, the injection current to the optical gate 1725 increases, and the voltage drop due to the injection current and the resistor 1910 causes
Since the voltage applied to the optical gate 1727 decreases, the optical gate 1727 can no longer transmit the subsequent data signal. By the above operation, only the data part optical signal of the optical packet signal A passes through the optical gate 1720 and is self-routed to the optical waveguide 1704 via the optical coupler 1730.

As described above, the optical self-routing circuit shown in FIG. 24 performs self-routing of an optical packet signal between a plurality of inputs and outputs, even when a plurality of optical packet signals collide. Or t2-t
3, the priority is given according to the magnitude of the light amount of the header part optical signal,
One optical packet signal can be output.

[0084]

As described above, when a collision of a plurality of optical packet signals occurs according to the present invention, one of these collisions occurs.
An optical self-routing circuit that preferentially self-routes two optical signals can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of an optical self-routing circuit according to a first embodiment of the present invention.

FIG. 2 is a timing chart illustrating an operation of the optical self-routing circuit of FIG. 1;

FIG. 3 is an explanatory diagram showing a configuration of an optical self-routing circuit according to a second embodiment of the present invention.

FIG. 4 is a timing chart showing an operation of the optical self-routing circuit of FIG. 3;

FIG. 5 is an explanatory diagram showing a configuration of an optical self-routing circuit according to a third embodiment of the present invention.

FIG. 6 is a timing chart showing an operation of the optical self-routing circuit of FIG. 5;

FIG. 7 is an explanatory diagram showing a configuration of an optical self-routing circuit according to a fourth embodiment of the present invention.

FIG. 8 is a timing chart showing an operation of the optical self-routing circuit of FIG. 7;

FIG. 9 is an explanatory diagram showing a configuration of an optical self-routing circuit according to a fifth embodiment of the present invention.

FIG. 10 is a timing chart showing an operation of the optical self-routing circuit of FIG. 9;

FIG. 11 is an explanatory diagram showing a configuration of an optical self-routing circuit according to a sixth embodiment of the present invention.

FIG. 12 is a timing chart showing an operation of the optical self-routing circuit of FIG. 11;

FIG. 13 is an explanatory diagram showing a configuration of an optical self-routing circuit according to a seventh embodiment of the present invention.

FIG. 14 is a timing chart showing the operation of the optical self-routing circuit of FIG.

FIG. 15 is a timing chart showing the operation of the optical self-routing circuit of FIG.

FIG. 16 is a timing chart showing an operation of the optical self-routing circuit of FIG.

FIG. 17 is an explanatory diagram showing a configuration of an optical self-routing circuit according to an eighth embodiment of the present invention.

18 is a timing chart showing the operation of the optical self-routing circuit of FIG.

FIG. 19 is a timing chart showing an operation of the optical self-routing circuit of FIG. 17;

20 is a timing chart showing the operation of the optical self-routing circuit of FIG.

FIG. 21 is an explanatory diagram showing a configuration of an optical self-routing circuit according to a ninth embodiment of the present invention.

FIG. 22 is a timing chart showing an operation of the optical self-routing circuit of FIG. 21;

FIG. 23 is a timing chart showing an operation of the optical self-routing circuit of FIG. 21;

FIG. 24 is an explanatory diagram showing a configuration of an optical self-routing circuit according to a tenth embodiment of the present invention.

FIG. 25 is a timing chart showing an operation of the optical self-routing circuit of FIG. 24;

FIG. 26 is an explanatory diagram showing a configuration of a conventional optical self-routing circuit not using the present invention.

FIG. 27 is an explanatory diagram showing the structure of the optical gates 105 to 108 in FIG.

FIG. 28 is a timing chart showing the conventional optical self-routing circuit of FIG. 26;

[Explanation of symbols]

101, 102, 110, 111 Optical waveguides 105 to 108, 114, 115 Optical gates 120 to 123 Resistor 113 Electric pulse generation circuit 500 to 504 Optical waveguides 510 to 515 Optical gates 520, 521, 522 Optical merger 530 Electric pulse generation circuit 540 to 545, 700 to 702 Resistance 900 to 904 Optical waveguide 910 to 913 Optical gate 920 Optical coupler 930 Electric pulse generation circuit 940 to 943, 1100 Resistance 1300 to 1305 Optical waveguide 1310 to 1313 Optical splitter 1320 to 1327, 1340 1343 optical gate 1330-1335 optical coupler 1350 electric pulse generation circuit 1360-1363, 1370-1373, 1380,
1381, 1390, 1391 Resistance 1500, 1501, 1510, 1511, 1520,
1530 Resistance 1700 to 1705 Optical waveguide 1710 to 1713 Optical splitter 1720 to 1727 Optical gate 1730, 1731 Optical combiner 1740 Electric pulse generation circuit 1750 to 1753, 1760 to 1763, 1900,
1910 Resistance 2200 Input optical signal 2210 Light guide layer 2220, 2230 End face 2240 Electrode 2250 Output optical signal

Claims (10)

(57) [Claims] 1. An n number of m optical splitters for splitting an optical signal from each of n input terminals into m optical signals, and the n m optical splitters are connected to output terminals of the n m optical splitters and are different from each other. N optical gate elements belonging to the m optical branching system and 1
A first optical gate switch stage composed of a group of m optical gate elements; and an output of each of (n × m) optical gate elements constituting the first optical gate switch stage is 1 A second optical gate switch stage composed of m optical gate device groups each including n optical gate devices, and m optical gates of the second optical gate switch stage M n optical couplers for combining outputs of n optical gate elements constituting each element group and emitting the same to each of m output terminals;
Supplying each of the first group of electric pulses to each of the m optical gate element groups of the optical gate switch stage, and applying the second electrical pulse group to each of the m optical gate element groups of the second optical gate switch stage. An electrical pulse generating circuit for supplying each electrical pulse group, wherein the optical signal is exchanged between the n input terminals and the m output terminals. Is composed of a first header used in the first optical gate switch stage, a second header used in the second optical gate switch stage, and data subsequent thereto, and the first and second The header is set corresponding to a time position previously allocated to each of the m output terminals, and the electric pulse generation circuit is connected to each of the m optical gate element groups of the first optical gate switch stage. The second optical gate switch Stage of the m optical gates element group respectively and first
N optical gate elements constituting each of the m optical gate element groups of the first optical gate switch stage are respectively connected to the first optical gate switch stage by the first equal-amplitude signal from the electric pulse generation circuit. The n optical gate elements constituting each of the m optical gate element groups of the second optical gate switch stage are electrically connected in cascade such that each of the electric pulse groups is applied, and each of the n optical gate elements is a second resistor. Are electrically connected in cascade such that second electric pulse groups having different amplitudes are applied from the electric pulse generation circuit via each of the first and second electric pulse groups, and each of the first electric pulse groups has a time corresponding to each of the output terminals. Within a position, it is held at a high level voltage, then held at a lower intermediate level voltage for at least the data length of the second header of the optical signal and longer than the data length, and then dropped to a lower low level voltage. Typically The second group of electric pulses is held at a high level voltage within a time position corresponding to each of the output terminals, and is then changed to a lower middle level voltage for a time equal to or longer than the data length of the optical signal. And then periodically reduced to a lower low-level voltage, wherein the first optical gate switch stage comprises a first header of the optical signal and a high level of each of the first set of electrical pulses. A current is injected from the electric pulse generation circuit during a time when the medium-level voltage of each of the first electric pulse group is held in the optical gate element to which the voltage is simultaneously applied, and the optical gate element to which the current is injected Is the second of the optical signal
The second optical gate switch stage passes the second header and the second header of the optical signal incident in the n optical gate elements of each of the m optical gate element groups. The electric pulse generation circuit outputs the first electric pulse from the electric pulse generation circuit during a time when the medium level voltage of each of the second electric pulse groups is held to the optical gate element to which the high level voltage of the maximum amplitude of each electric pulse group is simultaneously applied. A current is injected through a resistor, and the optical gate element, into which a current is injected by each of the second electric pulse groups, allows the data of the optical signal to pass therethrough, and the optical gate element is generated by the current and the first resistor. The optical self-routing device is characterized in that the remaining (n-1) optical gate elements of each of the optical gate element groups are prevented from passing the data due to the high level voltage drop of each of the two electric pulse groups. Ingu circuit. 2. An n number of m optical splitters for splitting an optical signal from each of n input terminals into m optical signals, and connected to output terminals of the n number of m optical splitters, which are different from each other. N optical gate elements belonging to the m optical branching system and 1
A first optical gate switch stage composed of a group of m optical gate elements; and an output of each of (n × m) optical gate elements constituting the first optical gate switch stage is 1 A second optical gate switch stage composed of m optical gate element groups each including n optical gate elements as one group, and m optical gate elements of the second optical gate element A group of m optical gate elements for combining the outputs of the n optical gate elements constituting each group and emitting the same to each of the m output terminals; and m optical gate element groups of the first optical gate switch stage And an electric pulse generation circuit that supplies each of the first group of electric pulses to each of the m groups of optical gate elements of the second optical gate switch stage. And an optical signal exchange between the n input terminals and the m output terminals. An optical self-routing circuit, wherein the optical signal comprises a first header used in the first optical gate switch stage, a second header used in the second optical gate switch stage, and data subsequent thereto. Wherein the first and second headers are respectively set corresponding to time positions pre-assigned to the m output terminals, and the electric pulse generation circuit is provided for the first optical gate switch stage. connected to each of the m optical gate element groups, connected via a resistor to each of the m optical gate element groups of the second optical gate switch stage, and connected to the m optical gate switch groups of the first optical gate switch stage The n optical gate elements constituting each of the gate element groups are electrically cascaded so that the first electric pulse groups having the same amplitude from the electric pulse generation circuit are applied, respectively, Optical game The n optical gate elements constituting each of the m optical gate element groups of the switch stage are electrically cascaded such that each of the second electric pulse groups having the same amplitude from the electric pulse generating circuit is applied. Connected, each of the first set of electric pulses is held at a high level voltage within a time position corresponding to each of the output terminals, and then the second header and data of the optical signal are set to a lower intermediate level voltage. The second electric pulse group is held at a high level voltage within a time position corresponding to each of the output terminals, and the holding is performed for a long time or more, and thereafter, the second electric pulse group is dropped to a smaller low level voltage. Then, the voltage is held at the intermediate level voltage smaller than this for at least the data length of the optical signal and then dropped to the lower level voltage, which is periodically repeated. In the optical gate switch stage, the intermediate level voltage of each of the first electric pulse group is applied to the optical gate element to which the first header of the optical signal and the high level voltage of each of the first electric pulse group are simultaneously applied. A current is injected from the electric pulse generation circuit during the held time, and the optical gate element into which the current is injected is the second of the optical signal.
In the second optical gate switch stage, the second header having the maximum light amount of the optical signal incident on the n optical gate elements of each of the m optical gate element groups. The electric pulse generating circuit supplies the high-level voltage of each of the second electric pulse groups to the optical gate element to which the medium-level voltage of each of the second electric pulse groups is simultaneously applied to the optical gate element. The optical gate element, into which the current is injected by each of the second electric pulse groups, passes the data of the optical signal and the second electric pulse group generated by the current and the resistance. Self-routing circuit wherein the remaining (n-1) optical gate elements of each of the optical gate element groups are prevented from passing the data due to the high level voltage drop. 3. An i-th optical gate switch stage (where i
= 1~log ₂ n) is 2 ^(log2n-i) pieces of 2 × 1 and an optical gate element and (log ₂ n) pieces of optical gate switch stage, the 2 × 1 optical gate element each electrical pulse A self-routing circuit for exchanging an optical signal between n input terminals and one output terminal, wherein the optical signal is the (log ₂ n). ) Optical gate switch stages each comprising (log ₂ n) headers and subsequent data, wherein the output of the 2 × 1 optical gate element belonging to the ith switch stage is (i + 1) stage The electrical pulse generating circuit is connected to the inputs of the 2 × 1 optical gate elements belonging to the second switch stage in a tree shape, and the electric pulse generation circuit is connected to each of the 2 × 1 optical gate elements via a first resistor; Each 2 × 1 optical gate element has two optical gate elements And two one-junction devices that join the outputs of the two optical gate elements, and have different amplitudes from the electric pulse generation circuit to the two optical gate elements via a second resistor. Each of the electric pulses applied to each of the 2 × 1 optical gate elements of the i-th optical gate switch stage is held at a high level voltage, and is electrically connected in cascade so that the electric pulse is applied. The above (i +
1) It is held for at least the data length and the header used in the 2 × 1 optical gate element belonging to the switch stage after the stage,
Thereafter, the lowering to a smaller low-level voltage is periodically repeated. In the i-th optical gate switch, the optical signal incident on two optical gate elements constituting a 2 × 1 optical gate element Current is injected into the optical gate element to which the header for the i-th optical gate switch stage and the high-level voltage having the maximum amplitude of the electric pulse are simultaneously applied while the medium-level voltage of the electric pulse is held The optical gate element, into which a current is injected by the electric pulse, passes a header and data used in each of the 2 × 1 optical gate elements belonging to the (i + 1) th and subsequent switch stages of the optical signal, and transmits the current. And the first resistor causes a drop in the high-level voltage of the electric pulse.
The other optical gate element of the x1 optical gate element is prevented from passing the header and data used in each of the 2x1 optical gate elements belonging to the (i + 1) th and subsequent switch stages of the optical signal. An n × 1 optical self-routing circuit, characterized in that: 4. An i-th optical gate switch stage (where i
= 1~log ₂ n) is 2 ^(log2n-i) pieces of 2 × 1 and an optical gate element and (log ₂ n) pieces of optical gate switch stage, the 2 × 1 optical gate element each electrical pulse A self-routing circuit for exchanging an optical signal between n input terminals and one output terminal, wherein the optical signal is the (log ₂ n). ) Optical gate switch stages each comprising (log ₂ n) headers and subsequent data, and the output of the 2 × 1 optical gate element belonging to the i-th switch stage is (i + 1) stage The input of the 2 × 1 optical gate elements belonging to the second switch stage is connected one by one in a tree shape, and the electric pulse generating circuit is connected to each of the 2 × 1 optical gate elements via a resistor, Each optical gate element has two optical gate elements and a front And two one-junction devices for merging the outputs of the two optical gate elements. The electric pulse generating circuit applies electric pulses to the two optical gate elements such that electric pulses having the same amplitude are respectively applied to the two optical gate elements. Each of the electric pulses applied to each of the 2 × 1 optical gate elements of the i-th optical gate switch stage is held at a high level voltage, and then is changed to a lower intermediate level voltage ( i +
1) It is held for at least the data length and the header used in the 2 × 1 optical gate element belonging to the switch stage after the stage,
Thereafter, the lowering to a smaller low-level voltage is periodically repeated. In the i-th optical gate switch, the optical signal incident on two optical gate elements constituting a 2 × 1 optical gate element A current is injected into the optical gate element to which the maximum light amount header for the i-th optical gate switch stage and the high-level voltage of the electric pulse are simultaneously applied while the medium-level voltage of the electric pulse is held. The optical gate element, into which a current is injected by the electric pulse, passes a header and data used in each of the 2 × 1 optical gate elements belonging to the (i + 1) th and subsequent switch stages of the optical signal, and transmits the current. Due to the high-level voltage drop of the electric pulse generated by the resistor and the resistor, another optical gate element of the 2 × 1 optical gate element is switched from the (i + 1) th stage of the optical signal onward. n × 1 optical self-routing circuit, characterized in that it is prevented from passing the respective header and data used in the 2 × 1 optical gate elements belonging to the pitch stage. 5. An n optical gate element for receiving optical signals from each of n input terminals, and one n for combining outputs of the n optical gate elements and outputting the combined light to one output terminal. An optical pulse generator configured to supply each of the electric pulse groups to the n optical gate elements, wherein an optical signal is generated between the n input terminals and the one output terminal. An optical self-routing circuit for performing an exchange, wherein the optical signal is composed of a header and subsequent data, and the electric pulse generating circuit is connected to the n optical gate elements via a first resistor. The n optical gate elements are electrically connected in cascade through a second resistor so that electric pulses having different amplitudes are applied from the electric pulse generation circuit, and the electric pulse is a high-level voltage. And then smaller than this The voltage is held at the bell voltage for at least the data length of the optical signal, and thereafter, the voltage is reduced to a smaller low-level voltage periodically, and the optical signal incident on the n optical gate elements is repeated. A current is supplied from the electric pulse generation circuit via the first resistor to the optical gate element to which the header and the high-level voltage having the maximum amplitude of the electric pulse are simultaneously applied while the medium-level voltage of the electric pulse is held. The optical gate element, into which a current is injected by the electric pulse, allows the data of the optical signal to pass, and the n is generated by a high-level voltage drop of the electric pulse caused by the current and the first resistor. Remaining (n−
1) An n × 1 optical self-routing circuit, wherein the number of optical gate elements is suppressed from passing the data. 6. An n number of optical gate elements for receiving an optical signal from each of the n number of input terminals, and an n number of optical signals that merge outputs of the n number of optical gate elements and output to one output terminal. An optical pulse generator configured to supply each of the electric pulse groups to the n optical gate elements, wherein an optical signal is generated between the n input terminals and the one output terminal. An optical self-routing circuit for performing an exchange, wherein the optical signal is composed of a header and subsequent data, wherein the electric pulse generating circuit is connected to the n optical gate elements via a resistor, and Are electrically cascaded such that electric pulses of equal amplitude are applied from the electric pulse generation circuit, the electric pulses being held at a high level voltage, and then a lower medium level. Data of the optical signal to voltage The header and the electric pulse, which are the maximum light amount of the optical signal incident on the n optical gate elements, are periodically repeated to be held during the above, and thereafter to be reduced to a lower low level voltage. A current is injected from the electric pulse generation circuit through the resistor during a time when the middle level voltage of the electric pulse is held to the optical gate element to which the high level voltage is simultaneously applied, and the current is injected by the electric pulse. And the remaining (n-1) of the n optical gate elements are caused by the high level voltage drop of the electrical pulse caused by the current and the resistance while the optical gate element passes the data of the optical signal. Wherein the optical gate element is suppressed from passing the data. 7. An n number of m optical splitters for splitting an optical signal from each of n input terminals into m pieces, m pieces of n × 1 optical self-routing circuits, and the m pieces of n × 1 lights An electric pulse generating circuit for supplying an electric pulse to each of the self-routing circuits, wherein m outputs of the n m optical splitters are connected to the m different n × 1 optical self-routing circuits. The output of each of the m different n × 1 optical self-routing circuits is connected to m output terminals, and an optical signal for exchanging optical signals between the n input terminals and the m output terminals. A self-routing circuit, wherein each of the m n × 1 optical self-routing circuits comprises: i
The optical gate switch stage (where i = 1 to log ₂₎
n) is composed of (log ₂ n) optical gate switch stages composed of 2 ^(log2n-i) 2 × 1 optical gate elements, and a 2 × 1 optical gate belonging to the i-th switch stage The output of the element is 2 × belonging to the (i + 1) th switch stage.
The electrical pulse generating circuit is connected to the input of one optical gate element one by one in a tree shape, and the electric pulse generation circuit is connected to each of the 2 × 1 optical gate elements constituting each of the m n × 1 optical self-routing circuits and the first Each of the 2 × 1 optical gate elements which are connected via a resistor and constitute each of the m n × 1 optical self-routing circuits merges the outputs of the two optical gate elements with the outputs of the two optical gate elements. And two tandems are electrically connected in cascade such that the electric pulses having different amplitudes are applied from the electric pulse generation circuit to the two optical gate elements via a second resistor. The optical signal is composed of (log ₂ n) headers used in each of (log ₂ n) optical gate switch stages of each of the m n × 1 optical self-routing circuits, and subsequent data; The (l g ₂ n) pieces of header each set corresponding to a preassigned time position in the m output terminals, the m n × 1 optical self-routing circuit each i-th stage of the optical gate switch stage Each of the electric pulses applied to each of the 2 × 1 optical gate elements is maintained at a high level voltage, and then, at a lower intermediate level voltage, the 2 × 1 optical gates belonging to the (i + 1) th and subsequent switch stages The data is held for at least the length of the header and data used by each element, and then periodically dropped to a lower low-level voltage. The i-th stage of each of the m n × 1 optical self-routing circuits is periodically repeated. In the optical gate switch, i of the optical signal incident in two optical gate elements constituting the 2 × 1 optical gate element
Current is injected while the middle level voltage of the electric pulse is held in the optical gate element to which the header for the optical gate switch stage of the stage and the high level voltage of the maximum amplitude of the electric pulse are simultaneously applied, The optical gate element, into which a current is injected by the electric pulse, passes a header and data used in each of the 2 × 1 optical gate elements belonging to the (i + 1) th and subsequent switch stages of the optical signal. The high level voltage drop of the electrical pulse occurring at the first resistor
The other optical gate element of the x1 optical gate element is prevented from passing the header and data used in each of the 2x1 optical gate elements belonging to the (i + 1) th and subsequent switch stages of the optical signal. An n × m optical self-routing circuit, characterized in that: 8. An n number of m optical splitters for splitting an optical signal from each of n input terminals into m pieces, m pieces of n × 1 optical self-routing circuits, and the m pieces of n × 1 lights An electric pulse generating circuit for supplying an electric pulse to each of the self-routing circuits, wherein m outputs of the n m optical splitters are connected to the m different n × 1 optical self-routing circuits. The output of each of the m different n × 1 optical self-routing circuits is connected to m output terminals, and an optical signal for exchanging optical signals between the n input terminals and the m output terminals. A self-routing circuit, wherein each of the m n × 1 optical self-routing circuits comprises: i
The optical gate switch stage (where i = 1 to log ₂₎
n) is composed of (log ₂ n) optical gate switch stages composed of 2 ^(log2n-i) 2 × 1 optical gate elements, and a 2 × 1 optical gate belonging to the i-th switch stage The output of the element is 2 × belonging to the (i + 1) th switch stage.
The input of one optical gate element is connected to the input of one optical gate element in a tree shape, and the electric pulse generating circuit is connected to each of the 2 × 1 optical gate elements constituting each of the m n × 1 optical self-routing circuits via a resistor. Each of the 2 × 1 optical gate elements forming each of the m n × 1 optical self-routing circuits is connected to two optical gate elements and one 2 × 1 which merges the outputs of the two optical gate elements. And a multiplexing device, and are electrically connected in cascade such that electric pulses having the same amplitude are applied from the electric pulse generation circuit to the two optical gate elements, respectively, and the optical signals are m n × 1. Each of the optical self-routing circuits (log
₂ n) used in the number of optical gate switch stage respectively (lo
g ₂ n) headers and subsequent data, wherein each of the (log ₂ n) headers is set corresponding to a time position previously allocated to the m output terminals, and Each of the electric pulses applied to each of the 2 × 1 optical gate elements of the i-th optical gate switch stage of each of the n × 1 optical self-routing circuits of the above-mentioned n × 1 optical self-routing circuits is held at a high level voltage, and then a lower intermediate level voltage In the 2 × 1 optical gate element belonging to the (i + 1) th and subsequent switch stages, the data is held for at least the data length of the header and the data length, and thereafter, the voltage is further reduced to a lower low-level voltage. In the i-th optical gate switch of each of the m n × 1 optical self-routing circuits, the i of the optical signal incident in the two optical gate elements constituting the 2 × 1 optical gate element
A current is injected while the middle level voltage of the electric pulse is held in the optical gate element to which the header of the maximum light amount for the stage of the optical gate switch stage and the high level voltage of the electric pulse are simultaneously applied, The optical gate element, into which a current is injected by the electric pulse, passes a header and data used in each of the 2 × 1 optical gate elements belonging to the (i + 1) th and subsequent switch stages of the optical signal. A 2 × 1 optical gate element, wherein another optical gate element of the 2 × 1 optical gate element belongs to the (i + 1) -th or later switch stage of the optical signal due to a drop in the high level voltage of the electric pulse caused by the resistance. 3. An n × m optical self-routing circuit, wherein the passage of a header and data used in each of the above is suppressed. 9. An n-m optical splitter that splits an optical signal from each of the n input terminals into m optical signals, m n × 1 optical self-routing circuits, and the m n × 1 optical signals. An electric pulse generating circuit for supplying an electric pulse to each of the self-routing circuits, wherein m outputs of the n m optical splitters are connected to the m different n × 1 optical self-routing circuits. The output of each of the m different n × 1 optical self-routing circuits is connected to m output terminals, and an optical signal for exchanging optical signals between the n input terminals and the m output terminals. A self-routing circuit, wherein each of the m optical self-routing circuits outputs n optical gate elements for receiving optical signals from each of the n input terminals, and outputs of the n optical gate elements. One n-beam combined into one output terminal The electric pulse generation circuit is connected to n optical gate elements constituting each of the m optical self-routing circuits via a first resistor, and each of the m optical self-routing circuits is provided. N
The optical gate elements are electrically connected in cascade such that electric pulses having different amplitudes are applied from the electric pulse generation circuit via the second resistors, and the optical signal is a header and data following the header. Wherein the header is set in accordance with a time position pre-assigned to the m output terminals, and n comprises each of the m optical self-routing circuits.
The electrical pulses applied to the optical gate elements are held at a high level voltage, and then held at a lower intermediate level voltage for at least the data length of the optical signal, and then dropped to a lower level voltage. Is periodically repeated, and n constituting each of the m optical self-routing circuits
During the time when the middle level voltage of the electric pulse is held to the optical gate element to which the header of the optical signal and the high level voltage of the maximum amplitude of the electric pulse that are incident on the optical gate elements are simultaneously applied. A current is injected from the electric pulse generation circuit through the first resistor, the optical gate element into which the current is injected by the electric pulse passes data of the optical signal, and the current and the first resistor And the high level voltage drop of the electric pulse occurs at the remaining (n−n) of the n optical gate elements.
1) An n × m optical self-routing circuit, wherein the number of optical gate elements is suppressed from passing the data. 10. An n number of m optical splitters for splitting an optical signal from each of n input terminals into m pieces, m pieces of n × 1 optical self-routing circuits, and the m pieces of n × 1 lights An electric pulse generating circuit for supplying an electric pulse to each of the self-routing circuits, wherein m outputs of the n m optical splitters are connected to the m different n × 1 optical self-routing circuits. The output of each of the m different n × 1 optical self-routing circuits is connected to m output terminals, and an optical signal for exchanging optical signals between the n input terminals and the m output terminals. A self-routing circuit, wherein each of the m optical self-routing circuits outputs n optical gate elements for receiving optical signals from each of the n input terminals, and outputs of the n optical gate elements. One n-light that merges and exits to one output end The electric pulse generating circuit is connected to n optical gate elements constituting the m n × 1 optical self-routing circuits via a resistor, and the m n × 1 optical self-routing circuits are provided. Each of the n optical gate elements constituting the routing circuit is electrically cascaded such that electric pulses having the same amplitude are applied from the electric pulse generation circuit, and the optical signal is composed of a header and data following the header. Wherein the header is set corresponding to a time position pre-allocated to the m output terminals, and is applied to n optical gate elements constituting the m n × 1 optical self-routing circuits. The electrical pulse is held at a high level voltage, then at a lower intermediate level voltage for at least the data length of the optical signal, and then dropped to a lower level voltage. The header is the maximum light amount of the optical signal incident on the n optical gate elements constituting the m n × 1 optical self-routing circuits, and the high level voltage of the electric pulse is periodically repeated. A current is injected from the electric pulse generation circuit through the resistor during a time when the medium-level voltage of the electric pulse is held to the optical gate element to which the optical pulse is simultaneously applied, and the current is injected by the electric pulse. The elements pass the data of the optical signal and the remaining (n-1) optical gate elements of the n optical gate elements are reduced due to the high level voltage drop of the electrical pulse caused by the current and the resistance. An n × m optical self-routing circuit, wherein the passage of the data is suppressed.