RU2346311C1 - Optical signal switching unit - Google Patents

Abstract

FIELD: physics; optics.

SUBSTANCE: invention relates to optical data encoding, decoding and transmitting devices, in particular, to optical signal switching devices used in computer networks. Switching device comprises eight logical units. Logical unit comprises inputs/outputs from the 1^st to the 8^th. The 1^st input/output of logical units from 1 to 8 is, respectively, input/output of the 1^st - the 8^th channels of the switching device. Logical units from 2 to 4 and from 6 to 8 comprise additional 9^th input/output. Inputs/outputs 2-8 of the first logical unit are connected, respectively, to the 2^nd input/output of the second logical unit and to inputs/outputs 3, 4, 5, 6, 7, 8 of the fifth logical unit. Inputs/outputs 3-9 of the second logical unit are connected, respectively, to inputs/outputs 3, 4, 5, 6, 7, 8, 9 of the sixth logical unit.

EFFECT: simplified optical signal switching device and enhanced functional capabilities thereof.

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Description

The invention relates to devices for encoding, decoding and transmitting data represented by optical signals, in particular to optical signal switches used in computer networks.

Known wave filter switch optical signals [1], containing the first and second optical fibers, forming in a limited area fused and stretched twisted pair. The first input-output of the first optical fiber is the first multiplexed input-output of the switch. The second input-output of the first optical fiber is the first demultiplexed input-output of the switch. The first input-output of the second optical fiber is the second multiplexed input-output of the switch. The second input-output of the second optical fiber is the second demultiplexed input-output of the switch. The wave filter filter of optical signals [1] allows you to multiplex and demultiplex bi-directional optical signals with different wavelengths.

The disadvantage of the device [1] are limited functionality. In particular, it is impossible to switch optical signals between the first and second multiplexed or demultiplexed inputs / outputs. This does not allow using it as a central switching link when building a computer network with a star topology.

A known optical signal switch [2], containing seven logical blocks, the logical block contains the first - seventh inputs / outputs, the first input-output of the first - seventh logical blocks is, respectively, the input-output of the first - seventh channels of the switch. The logic unit is configured to transmit optical signals in certain directions. In particular, it can be configured to transmit signals in a computer network with a ring logical structure and star topology. Other settings are also possible.

The disadvantages of the switch [2] are complexity and limited functionality.

The first drawback is the use of a matrix of mirrors with controlled transparency. Amplifiers are needed to compensate for signal attenuation in a chain of mirrors. Mirror transparency can be controlled manually when configuring the system or remotely. The latter option implies the availability of software-accessible controls (for example, based on a microprocessor with appropriate software); in any case, the switch must have the means to supply voltage to it, which leads to its additional complication and degrades performance.

The second disadvantage is that only one channel is used to transmit data in each direction.

The purpose of the invention is to simplify the switch and expand its functionality.

The goal is achieved by the fact that in the optical signal switch containing eight logical blocks, the logical block contains the first - eighth inputs / outputs, the first input-output of the first - eighth logical blocks is the input-output of the first - eighth channels of the switch, the second is the fourth, and also the sixth - eighth logical blocks additionally contain a ninth input-output, the second - eighth inputs and outputs of the first logical block are connected respectively to the second input-output of the second logical block, with the third input the output of the eighth logical block, with the fourth input-output of the third logical block, with the fifth input-output of the seventh logical block, with the sixth input-output of the fourth logical block, with the seventh input-output of the sixth logical block and with the eighth input-output of the fifth logical block, the third and ninth inputs and outputs of the second logical unit are connected respectively to the third input and output of the third logical unit, with the fourth input and output of the fourth logical unit, with the fifth input and output of the eighth logical unit a, with the sixth input-output of the fifth logical unit, with the seventh input-output of the third logical unit, with the eighth input-output of the seventh logical unit and with the ninth input-output of the sixth logical unit, the second, fifth, sixth, eighth and ninth inputs and outputs the third logical block are connected respectively with the second input-output of the fourth logical block, with the fifth input-output of the fifth logical block, with the sixth input-output of the sixth logical block, with the eighth input-output of the eighth logical block and with the ninth input m-output of the seventh logical block, the third, fifth, seventh - ninth inputs and outputs of the fourth logical block are connected respectively to the third input-output of the fifth logical block, with the fifth input-output of the sixth logical block, with the seventh input-output of the seventh logical block, with the eighth input-output of the sixth logical unit and with the ninth input-output of the eighth logical unit, the second, fourth and seventh inputs and outputs of the fifth logical unit are connected respectively to the second input-output of the sixth logical unit, with the fourth input-output of the seventh logical unit and with the seventh input-output of the eighth logical unit, the third and fourth inputs and outputs of the sixth logical unit are connected respectively to the third input-output of the seventh logical unit and with the fourth input-output of the eighth logical unit, the second and sixth the inputs and outputs of the seventh logical block are connected respectively to the second and sixth inputs and outputs of the eighth logical block, the first and eighth logical blocks contain the first and sixth wave filters, the second and fourth the sixth and eighth logical blocks additionally contain a seventh wave filter, in the first and eighth logical blocks the multiplexed input-output of the first wave filter is the first input-output of the corresponding logic block, the first and second demultiplexed inputs and outputs of the first wave filter are connected respectively to the multiplexed inputs and outputs of the second and third wave filters, the first and second demultiplexed inputs and outputs of the third wave filter are connected respectively Actually with multiplexed inputs and outputs of the fifth and fourth wave filters, the second demultiplexed input-output of the second wave filter is connected to the multiplexed input-output of the sixth wave filter, the first and second demultiplexed inputs and outputs of the sixth wave filter are connected to the seventh and sixth inputs and outputs of the corresponding logic block, the first and second demultiplexed inputs and outputs of the fifth wave filter are connected respectively to the fifth and fourth inputs and-outputs of the corresponding logic block, the first and second demultiplexed inputs and outputs of the fourth wave filter are connected respectively to the third and second inputs and outputs of the corresponding logic block, in the first and fifth logical blocks, the first demultiplexed input and output of the second wave filter is connected to the eighth input-output the corresponding logical block, in the second - fourth and sixth - eighth logical blocks, the first demultiplexed input-output of the second wave filter is connected to the seventh wave filter with the multiplexed input-output, the first and second demultiplexed inputs and outputs of which are connected to the ninth and eighth inputs and outputs of the corresponding logic block, in the first and eighth logical blocks, the first and third wave filters are respectively wave filters of the first and third types, the fourth - the sixth wave filters are, respectively, the wave filters of the seventh, sixth and fifth types, in the second - fourth and sixth - eighth logical blocks of gray my wave filter is a wave filter of the fourth type.

In the proposed optical signal switcher, wave filters of the first and seventh types operate with optical signals with wavelengths numbered in the form of a series of λ1, λ2, λ3, ..., the wavelength increases uniformly as its number increases, the multiplexed input-output of the wave filter of the first type is transparent to optical signals with wavelengths with the numbers λ1, λ2, λ3, ..., the first demultiplexed input-output of the wave filter of the first type is transparent for optical signals with wavelengths with the numbers λ1, λ3, λ5, ... and opaque optical signals with wavelengths with numbers λ2, λ4, λ6, ..., the second demultiplexed input-output of the wave filter of the first type is transparent for optical signals with wavelengths with numbers λ2, λ4, λ6, ... and opaque for optical signals with wavelengths with numbers λ1, λ3, λ5, ..., the multiplexed input-output of the wave filter of the second type is transparent for optical signals with wavelengths with numbers λ1, λ3, λ5, ..., the first demultiplexed input-output of the wave filter of the second type is transparent for optical signals with wavelengths with numbers λ1, λ5, λ9, ... and opaque for optical signals with wavelengths with the numbers λ3, λ7, λ11, ..., the second demultiplexed input-output of the wave filter of the second type is transparent for optical signals with wavelengths with the numbers λ3, λ7, λ11, ... and opaque for optical signals with wavelengths with the numbers λ1, λ5, λ9, ..., the multiplexed input-output of the wave filter of the third type is transparent for optical signals with wavelengths with the numbers λ2, λ4, λ6, ..., the first demultiplexed input-output of the wave filter third type is transparent to optically signals with wavelengths λ2, λ6, λ10, ... and opaque for optical signals with wavelengths λ4, λ8, λ12, ..., the second demultiplexed input-output wave filter of the third type is transparent for optical signals with wavelengths with numbers λ4 , λ8, λ12, ... and opaque for optical signals with wavelengths λ2, λ6, λ10, ..., the multiplexed input-output of the fourth wave filter is transparent for optical signals with wavelengths λ1, λ5, λ9, ..., the first demultiplexed input-output wave filter the fourth type is transparent for optical signals with wavelengths λ1, λ9, ... and opaque for optical signals with wavelengths λ5, λ13, ..., the second demultiplexed input-output wave filter of the fourth type is transparent for optical signals with wavelengths λ5, λ13, ... and opaque for optical signals with wavelengths λ1, λ9, ..., the fifth-type multiplexed input-output of a wave filter of the fifth type is transparent for optical signals with wavelengths λ3, λ7, λ11, ..., the first demultiplexed in the fifth type wave filter output / output is transparent for optical signals with wavelengths λ3, λ11, ... and opaque for optical signals with wavelengths λ7, λ15, ..., the second demultiplexed fifth type wave filter input-output is transparent for optical signals with wavelengths with numbers λ7, λ15, ... and opaque for optical signals with wavelengths with numbers λ3, λ11, ..., the multiplexed input-output of the wave filter of the sixth type is transparent for optical signals with wavelengths with numbers λ2, λ6, λ10, ... first demu the sixth type input-output of a wave filter of the sixth type is transparent for optical signals with wavelengths λ2, λ10, ... and opaque for optical signals with a wavelength with numbers λ6, λ14, ..., the second demultiplexed input-output of a wave filter of sixth type is transparent for optical signals with wavelengths with numbers λ6, λ14, ... and opaque for optical signals with wavelengths with numbers λ2, λ10, ..., the multiplexed input-output of a wave filter of the seventh type is transparent for optical signals with wavelengths with numbers and λ4, λ8, λ12, ..., the first demultiplexed input-output of a wave filter of the seventh type is transparent for optical signals with wavelengths with the numbers λ4, λ12, ... and opaque for optical signals with wavelengths with the numbers λ8, λ16, ..., the second demultiplexed the input-output of the wave filter of the seventh type is transparent for optical signals with wavelengths with the numbers λ8, λ16, ... and opaque for optical signals with wavelengths with the numbers λ4, λ12 ...

Figure 1 presents a simplified sketch of the design of the known [1] wave filter; figure 2, a is a transparency diagram of the wave filter F1 of the first type; figure 2, b - transparency diagrams of wave filters F2 and F3 of the second and third types; figure 2, in - transparency diagram of the wave filters F4-F7 of the fourth - seventh types; figure 3, az and figure 4, a - examples of paths of passage of optical signals through a wave filter of the first type; figure 4, b is an example of the inclusion of a filter of the first type in a data transmission system. Figure 5 presents the most common options for the topology of computer networks; Fig.6 is a functional diagram of the proposed six-channel optical signal switch; 7 and 8 are functional diagrams of logical blocks - components of the proposed switch optical signals.

The wave filter 1 (Fig. 1) is designed to separate (sort) a group of signals by wavelengths. It is built on the basis of a specially twisted and fused with the simultaneous stretching of the melt optical fibers 2 and 3 [1]. Hereinafter, depending on the setting of the physical parameters of the filter during its manufacture, it is designated F1, F2, F3, ..., F7 (filter of the first and seventh types). In any case, the filter is symmetrical in the sense that the pairs of its terminals X-W, W-X, Y-Z and Z-Y are functionally equivalent.

Depending on the parameters of twisting, melting and stretching of the optical fibers during the manufacture of the filter, it acquires selective transparency with respect to the transmission of light signals of certain wavelengths. In other words, the filter can in some way sort the input stream of “multi-colored” infrared light signals arriving from the outside in arbitrary combinations to pin X (to any of the four pins). The signals are assumed to have wavelengths λ1, λ2, ..., λ16 uniformly distributed on the horizontal numerical axes of the transparency diagrams shown in FIG. 2. Adjacent wavelengths are separated by equal gaps, for example 100 nm or more.

Graphs 4 and 5 (figure 2, a) display the transparency diagrams of the channels X-Y and X-Z of the filter F1. Since the filter is symmetrical, these same graphs display the transparency diagrams of the W-Z and W-Y channels, as well as the two remaining channels obtained by mutually reverse substitution of the X, W symbols with the Y, Z symbols. Levels 0 and 100% correspond to the opaque and fully transparent channel states. The graphs for their simplification are represented by two antiphase sinusoids, although in reality their shape is more complex and depends on the filter manufacturing technology. From graph 4 it follows that the X-Y channel (as well as the W-Z channel) of the F1 filter is transparent for light with wavelengths λ1, λ3, λ5, ..., λ15 and opaque for light with wavelengths λ2, λ4, λ6, ..., λ16. If the channel is transparent, then light of the corresponding wavelengths can be transmitted through it in either or simultaneously in both directions. An opaque channel does not transmit light of the corresponding wavelengths in any direction.

Figure 5 shows that the X-Z channel (as well as the W-Y channel) of the F1 filter is transparent to light with wavelengths λ2, λ4, λ6, ..., λ16 and opaque to light with wavelengths λ1, λ3, λ5, ..., λ15.

Graphs 6 and 7 (figure 2, b) display the transparency diagrams of the channels X-Y and X-Z (W-Z and W-Y) of the filter F2. They are represented by sinusoids with doubled periods compared to graphs 4 and 5. From graph 6 it follows that the X-Y channel of the F2 filter is transparent to light with wavelengths λ1, λ5, λ9, λ13 and opaque to light with wavelengths λ3, λ7, λ11, λ15. Graph 7 is out of phase with graph 6 and displays the transparency diagram of the channel X-Z of filter F2. The transparency of the X-Y and X-Z channels (W-Z and W-Y) of the F2 filter with respect to light signals with wavelengths λ2, λ4, λ6, ..., λ16 is undefined, but such signals do not arrive at this filter during its operation.

Graphs 8 and 9 (figure 2, b) display the transparency diagrams of the channels X-Y and X-Z (W-Z and W-Y) of the filter F3. They are represented by sinusoids of the same frequency as sinusoids 6 and 7, but are shifted relative to them in phase to the right by a quarter of the period. From graph 8 it follows that the X-Y channel of the F3 filter is transparent to light with wavelengths λ2, λ6, λ10, λ14 and opaque to light with wavelengths λ4, λ8, λ12, λ16. Graph 9 is out of phase with graph 8 and displays the transparency diagram of channel X-Z of filter F3. The X-Z channel of the F3 filter is transparent to light with wavelengths λ4, λ8, λ12, λ16 and opaque to light with wavelengths λ2, λ6, λ10, λ14. The transparency of the channels X-Y and X-Z (W-Z and W-Y) of the filter F3 with respect to light signals with wavelengths λ1, λ3, λ5, ..., λ15 is uncertain, but such signals do not arrive at this filter during its operation.

Graphs 10 and 11 (figure 2, b) display the transparency diagrams of the channels X-Y and X-Z (W-Z and W-Y) of the filter F4. They are represented by sinusoids with doubled periods in comparison with graphs 6-9. From graph 10 it follows that the X-Y channel of the F4 filter is transparent to light with wavelengths λ1, λ9 and opaque to light with wavelengths λ5, λ13. Graph 11 is out of phase with graph 10 and displays the transparency diagram of channel X-Z of filter F4. This channel is transparent to light with wavelengths λ5, λ13 and opaque to light with wavelengths λ1, λ9. The transparency of the X-Y and X-Z channels (WZ and WY) of the F4 filter with respect to light signals with wavelengths λ2-λ4, λ6-λ8, λ10-λ12, λ14-λ16 is undefined, but such signals do not arrive at this filter in the process of his work.

Graphs 12 and 13 (figure 2, b) display the transparency diagrams of the channels X-Y and X-Z (W-Z and W-Y) of the filter F5. From graph 12 it follows that the X-Y channel of the F5 filter is transparent to light with wavelengths λ3, λ11 and opaque to light with wavelengths λ7, λ15. Graph 13 is out of phase with graph 12 and displays the transparency diagram of channel X-Z of filter F5. This channel is transparent to light with wavelengths λ7, λ15 and opaque to light with wavelengths λ3, λ11. The transparency of the X-Y and X-Z channels (WZ and WY) of the F5 filter with respect to light signals with wavelengths λ1, λ2, λ4-λ6, λ8-λ10, λ12-λ14, λ16 is undefined, but such signals do not arrive at this filter in the process of its operation.

Graphs 14 and 15 (figure 2, e) display the transparency diagrams of the channels X-Y and X-Z (W-Z and W-Y) of the filter F6. From graph 14 it follows that the X-Y channel of the F6 filter is transparent to light with wavelengths λ2, λ10 and opaque to light with wavelengths λ6, λ14. Graph 15 is out of phase with graph 14 and displays an X-Z channel transparency diagram of filter F6. This channel is transparent to light with wavelengths λ6, λ14 and opaque to light with wavelengths λ2, λ10. The transparency of the X-Y and X-Z channels (WZ and WY) of the F6 filter with respect to light signals with wavelengths λ1, λ3-λ5, λ7-λ9, λ11-λ13, λ15, λ16 is undefined, but such signals do not arrive at this filter in the process of its operation.

Graphs 16 and 17 (figure 2, c) display the transparency diagrams of the channels X-Y and X-Z (W-Z and W-Y) of the filter F7. From graph 16 it follows that the X-Y channel of the F7 filter is transparent to light with wavelengths λ4, λ12 and opaque to light with wavelengths λ8, λ16. Graph 17 is out of phase with graph 16 and displays the transparency diagram of the X-Z channel of the F7 filter. This channel is transparent to light with wavelengths λ8, λ16 and opaque to light with wavelengths λ4, λ12. The transparency of the X-Y and X-Z channels (WZ and WY) of the F7 filter with respect to light signals with wavelengths λ1-λ3, λ5-λ7, λ9-λ11, λ13-λ15 is undefined, but such signals do not arrive at this filter in the process of his work.

Examples of 18-23 paths of the passage of optical signals through the wave filter F1 (Fig.3, a-e) show the propagation of a group of light signals through the filter from left to right, from right to left and simultaneously in both directions. In these examples, one of the filter pins is not used.

In accordance with example 22 (Fig.3, d), the input-output X of the filter F1 is hereinafter referred to as multiplexed input-output, input-output Y - the first demultiplexed input-output, input-output Z - the second demultiplexed input-output of the filter. Similarly, the input-output X of the filters F2-F7 is hereinafter referred to as multiplexed input-output, input-output Y - the first demultiplexed input-output, input-output Z - the second demultiplexed input-output.

In examples 24-26, shown in figure 3, g, h and figure 4, a, used all the conclusions of the filter F1.

Examples 24 and 25 show the possibility of using the filter F1 to interface unidirectional transmission lines of optical signals with bidirectional.

In example 24, the optical signal supplied to input X on the left side contains 16 components with wavelengths λ1-λ16. The signal taken from the output of the filter W also contains 16 components with the same wavelengths λ * 1-λ * 16. The signs "*" indicate that the signals arrived at the inputs of the filter F1 on the right side. At the input-output Y, signals with wavelengths λ1, λ3, λ5, ..., λ15 propagate to the right, and signals with wavelengths λ * 2, λ * 4, λ * 6, ..., λ * 16 - to the left. At the input / output Z, signals with wavelengths λ2, λ4, λ6, ..., λ16 propagate to the right, and signals with wavelengths λ * 1, λ * 3, λ * 5, ..., λ * 15 - to the left.

Example 25 differs from example 24 in the directions of signal transmission through the terminals X and W of filter F1.

In example 26 (Fig. 4, a), all lines connected to the filter F1 are bi-directional. On each line 16 pairs of oppositely directed optical signals are transmitted, each pair has the same wavelength. In essence, this scheme is not a fully connected switch capable of transmitting data in the directions: X → Y, X → Z, W → Y, W → Z, Y → X, Y → W, Z → X, Z → W. To select the direction of transmission (routing the information packet), the data source uses wavelengths with even or odd numbers. For example, an external source of the signal supplied to the input-output Z of the filter F1, wishing to transmit a message to the communication line connected to the inputs-outputs X or W, can use light pulses for this purpose with the corresponding wavelengths λ * 6 or λ ″ 15.

Direct data transfer in adjacent directions X → W, W → X, Y → Z, Z → Y is impossible. If there is an intermediary device 27 (Fig. 4, b), such transfers are feasible. For example, an external source of the signal supplied to the input-output Z of the filter F, wishing to transmit a message to the communication line 28 connected to the inputs / outputs Y, can use light pulses with a wavelength of λ * 8 for this. These pulses pass to the input-output X and are received by the device Q (27). According to preliminary "agreement" with this device, it immediately delivers the received pulses back to the input-output X, but uses light with a wavelength of λ13 for this. Filter F1 transfers these pulses to input-output Y, as required.

The above examples (they can be extended to filters of other types, taking into account their transparency diagrams) show the previously mentioned limited capabilities of the filter [1] when it is used as a functionally complete switch of optical signals in a computer network.

Figure 5 presents the most common options for the topology of computer networks. The topology of the type of "common bus" (Fig.5, a) is mainly used in local networks of early generations. Coaxial cables are commonly used as signal transmission medium. The use of fiber-optic communication lines within the framework of this topology is difficult, since it is necessary to install optical splitters to connect each node 29 to a common trunk 30. This is not technologically advanced, in addition, each splitter divides the energy of the signal fed into it into two parts, so that the levels of received signals depend from the relative position of the transmitter and receiver.

The topology of the "star" type with a common hub 31 (Fig.5, b) suggests the presence of radial connections between the hub and the nodes 32 of the network. The concentrator summarizes all the optical signals entering it, distributes the total signal evenly between all channels, if possible, and simultaneously transmits it in the opposite directions. Some hubs work by the principle of distributing the input signal between all channels except for their own, which facilitates the detection of collisions while simultaneously addressing two or more nodes 32 to a common signal transmission medium.

The main disadvantage of this structure is that the input signal power is divided by the number of channels reaching one hundred or more. To restore the levels of the output signals, active concentrators are used, which are able to enhance the power of the light fluxes emitted by them in all directions. This complicates the structure of the hub and requires a power source.

In a network with a ring topology (FIG. 5, c), the nodes 33 are connected in a series closed circuit. The disadvantages inherent in the previously discussed networks (figure 5, a, b), in this case are absent. Each node suspends the distribution of information packets addressed to it and transmits “foreign” packets to the next node.

In the event of a failure of a node, the main direction of packet transmission, having reached the node closest to it, can be reversed, so that all nodes that are still operational are accessible. In order to preserve the possibility of bi-directional data transmission in a ring in case of failure of one of the nodes, this node is automatically or manually excluded from operation, and optical communication lines broken by such a failure are connected directly. In this case, the connecting element introduces losses in the transmission of the signal, in addition, the length of the newly created communication line becomes equal to the sum of the lengths of communication lines that previously connected the failed node to the neighboring ones.

This disadvantage is absent in the network with combined topology (figure 5, g). Outwardly, it resembles the previously considered network with a star topology (Fig. 5, b), but instead of a hub 31, it uses a switch 34 connected to nodes 35. Unlike a hub, the switch 34 is capable of combining optical fibers in a certain way connecting it with nodes 35. For example, inside the switch, you can create connections in which the network has a ring logical structure similar to that shown in Fig. 5, c. Arrows 36 in FIG. 5, d correspond to packet transmission routes between nodes 35. As follows from the above diagram, packet transmission between nodes 35 occurs essentially along arrows 37, as in a network with a ring topology.

Isolation and bypass of one or more faulty or switched off nodes 35 is carried out by the corresponding adjustment of the internal circuits of the switch 34 and does not affect the network nodes and communication lines.

The switch 38 [2] (Fig. 5, d) contains logical blocks 39, the logical block contains an external 40 and internal 41 inputs / outputs, the external input-output 40 of the logical unit 39 is the input-output of the corresponding channel of the switch and is connected to the corresponding node 42 network. The internal inputs and outputs 41 of the logic blocks 39 are connected to the optical switching matrix 43.

Logic blocks 39 can be configured to transmit signals between nodes 42 in a ring pattern, as shown in Fig. 5, d. Settings are possible that provide logical isolation and bypass of faulty or switched off nodes 42 or communication lines with these nodes.

The proposed switch, shown in Fig.6, contains eight logical blocks 44-51, the logical block contains the first - eighth 52-59 inputs / outputs, the first 52 input-output of the first - eighth 44-51 logical blocks is respectively the input-output of the first - eighth channel switch.

The second - the fourth 45-47, as well as the sixth - eighth 49-51 logic blocks additionally contain the ninth input-output 60.

The second and eighth 53-59 inputs and outputs of the first logical block 44 are connected respectively to the second input-output 53 of the second logical block 45, with the third input-output 54 of the eighth logical block 51, with the fourth input-output 55 of the third logical block 46, with the fifth the input-output 56 of the seventh logical block 50, with the sixth input-output 57 of the fourth logical block 47, with the seventh input-output 58 of the sixth logical block 49 and with the eighth input-output 59 of the fifth logical block 48.

The third and ninth 54-60 inputs and outputs of the second logical unit 45 are connected respectively with the third input-output 54 of the third logical unit 46, with the fourth input-output 55 of the fourth logical unit 47, with the fifth input-output 56 of the eighth logical unit 51, with the sixth the input-output 57 of the fifth logical block 48, with the seventh input-output 58 of the third logical block 46, with the eighth input-output 59 of the seventh logical block 50 and with the ninth input-output 60 of the sixth logical block 49.

The second 53, fifth 56, sixth 57, eighth 59 and ninth 60 inputs and outputs of the third logical block 46 are connected respectively to the second input-output 53 of the fourth logical block 47, with the fifth input-output 56 of the fifth logical block 48, with the sixth input-output 57 of the sixth logical block 49, with the eighth input-output 59 of the eighth logical block 51 and with the ninth input-output 60 of the seventh logical block 50.

The third 54, fifth 56, seventh to ninth 58-60 inputs and outputs of the fourth logical unit 47 are connected respectively to the third input-output 54 of the fifth logical unit 48, with the fifth input-output 56 of the sixth logical unit 49, with the seventh input-output 58 of the seventh logical block 50, with the eighth input-output 59 of the sixth logical block 49 and with the ninth input-output 60 of the eighth logical block 51.

The second 53, fourth 55 and seventh 58 inputs and outputs of the fifth logic unit 48 are connected respectively to the second input-output 53 of the sixth logical unit 49, with the fourth input-output 55 of the seventh logical unit 50 and with the seventh input-output 58 of the eighth logical unit 51.

The third 54 and fourth 55 inputs and outputs of the sixth logical unit 49 are connected respectively to the third input / output 54 of the seventh logical unit 50 and to the fourth input / output 55 of the eighth logical unit 51.

The second 53 and sixth 57 inputs and outputs of the seventh logical unit 50 are connected respectively to the second 53 and sixth 57 inputs and outputs of the eighth logical unit 51.

The first - eighth logic blocks 44-51 contain the first - sixth wave filters 61-66, the second - the fourth 45-47, and the sixth - eighth 49-51 logic blocks additionally contain the seventh wave filter 67.

In the first and eighth logical blocks 44-51, the multiplexed input-output 68 of the first wave filter 61 is the first input-output 52 of the corresponding logic block, the first 69 and second 70 demultiplexed inputs and outputs of the first wave filter 61 are connected respectively to the multiplexed inputs and outputs 71 and 72 second 62 and third 63 wave filters.

In the first and eighth logical blocks 44-51, the first 73 and second 74 demultiplexed inputs and outputs of the third wave filter 63 are connected respectively to the multiplexed inputs and outputs 75 and 76 of the fifth 65 and fourth 64 wave filters, the second demultiplexed input and output 77 of the second wave filter 62 connected to the multiplexed input-output 78 of the sixth wave filter 66.

In the first and eighth logical blocks 44-51, the first 79 and second 80 demultiplexed inputs and outputs of the sixth wave filter 66 are connected to the seventh 58 and sixth 57 inputs and outputs of the corresponding logic block, the first 81 and second 82 demultiplexed inputs and outputs of the fifth wave filter 65 connected respectively to the fifth 56 and fourth 55 inputs and outputs of the corresponding logic unit, the first 83 and second 84 demultiplexed inputs and outputs of the fourth wave filter 64 are connected respectively to the third 54 and W ring 53 inputs-outputs corresponding logical block.

In the first 44 and fifth 48 logic blocks, the first demultiplexed input-output 85 of the second wave filter 62 is connected to the eighth input-output 59 of the corresponding logical block.

In the second - fourth 45-47 and sixth - eighth 49-51 logic blocks, the first demultiplexed input-output 85 of the second wave filter 62 is connected to the multiplexed input-output 86 of the seventh wave filter 67, the first 87 and second 88 of which demultiplexed inputs and outputs are connected respectively with ninth 60 and eighth 59 inputs and outputs of the corresponding logic block.

In the first - eighth 44-51 logical blocks, the first - third 61-63 wave filters are respectively the F1-F3 wave filters of the first - third types, the fourth - sixth 64-66 wave filters are respectively the wave filters F7 of the seventh, F6 of the sixth and F5 of the fifth type , in the second - fourth 45-47 and sixth - eighth 49-51 logic blocks, the seventh wave filter 67 is a wave filter F4 of the fourth type.

When the switch is switched on to the computer network, its nodes are connected to the inputs and outputs 52 of the first and eighth logical units 44-51. For the convenience of the presentation in Fig.6 - 8 fiber-optic communication channels with network nodes are indicated by the letters A, B, C, ..., N.

To exchange data between network nodes, optical signals with wavelengths λ1-λ16 uniformly distributed on the horizontal numerical axes of the diagrams shown in FIG. 2 are used. In general, the number of wavelengths used is not limited to sixteen.

Using the proposed switch, a complete graph of bidirectional connections between network nodes connected to fiber optic channels AH is implemented:

А↔В, А↔С, А↔D, А↔Е, А↔F, А↔G, А↔Н, В↔С, В↔D, В↔Е, В↔F, В↔G, В↔ H, С↔D, С↔Е, С↔F, С↔G, С↔Н, D↔Е, D↔F, D↔G, D↔Н, Е↔F, Е↔G, Е↔Н, F↔G, F↔H, G↔H.

The table shows the wavelengths of the optical signals corresponding to data transmission routes between different pairs of fiber optic channels of the switch.

Table Data transfer route Optical wavelengths A↔B λ8, λ16 A↔C λ6, λ14 A↔d λ7, λ15 А↔Е λ1, λ5, λ9, λ13 A↔f λ3, λ11 A↔g λ2, λ10 A↔N λ4, λ12 В↔С λ3, λ4, λ11, λ12 B↔D λ6, λ14 VE λ7, λ15 B↔f λ1, λ9 B↔g λ5, λ13 V↔N λ2, λ10 C↔d λ8, λ16 С↔Е λ2, λ10 C↔f λ7, λ15 C↔g λ1, λ9 CH↔N λ5, λ13 D↔e λ4, λ12 D↔f λ2, λ5, λ10, λ13 D↔g λ3, λ11 D↔h λ1, λ9 E↔f λ8, λ16 E↔g λ6, λ14 Eh λ3, λ11 F↔g λ4, λ12 F↔h λ6, λ14 G↔h λ7, λ8, λ15, λ16

It follows from the table that, for example, for bi-directional transmission of data packets between network nodes connected to the D and F channels of the switch, you can use signals with wavelengths λ2, λ5, λ10, λ13 - one of these signals or, for parallelization of transmission, simultaneously two, three or four signals.

The application of the proposed optical signal switch allows simplifying the construction of networks with a fully connected graph of connections between its nodes or with a logical structure of the ring type and star topology. Due to the possibility of communication of each channel with each, parallelization of data streams and logical isolation of faulty or switched off network nodes are implemented. The switch operates without a power source. The route of the data packet transmitted by the network node is specified at the physical (and not at the network) level by selecting the wavelength of the linear signal.

Information sources

1. US Patent No. 5809190 (Fig. 5).

2. US Patent No. 6,134,357 (Fig. 4) (prototype).

Claims (2)

1. The optical signal switch containing eight logical blocks, the logical block contains the first to eighth input-outputs, the first input-output of the first and eighth logical blocks is the input-output of the first and eighth channels of the switch, characterized in that the second is the fourth and also the sixth - eighth logical blocks additionally contain a ninth input-output, the second - eighth inputs-outputs of the first logical block are connected respectively to the second input-output of the second logical block, with the third input-output ohm of the eighth logical block, with the fourth input-output of the third logical block, with the fifth input-output of the seventh logical block, with the sixth input-output of the fourth logical block, with the seventh input-output of the sixth logical block and with the eighth input-output of the fifth logical block, the third and ninth inputs and outputs of the second logical block are connected respectively to the third input-output of the third logical block, with the fourth input-output of the fourth logical block, with the fifth input-output of the eighth logical block, with the fifth input logical input-output of the fifth logical block, with the seventh input-output of the third logical block, with the eighth input-output of the seventh logical block and with the ninth input-output of the sixth logical block, the second, fifth, sixth, eighth and ninth inputs and outputs of the third logical block connected respectively with the second input-output of the fourth logical block, with the fifth input-output of the fifth logical block, with the sixth input-output of the sixth logical block, with the eighth input-output of the eighth logical block and with the ninth input-output the seventh logical block, the third, fifth, seventh - ninth inputs and outputs of the fourth logical block are connected respectively to the third input-output of the fifth logical block, with the fifth input-output of the sixth logical block, with the seventh input-output of the seventh logical block, with the eighth input - the output of the sixth logical block and with the ninth input-output of the eighth logical block, the second, fourth and seventh inputs and outputs of the fifth logical block are connected respectively to the second input-output of the sixth logical block, with the fourth input-output of the seventh logical unit and with the seventh input-output of the eighth logical unit, the third and fourth inputs and outputs of the sixth logical unit are connected respectively to the third input-output of the seventh logical unit and with the fourth input-output of the eighth logical unit, the second and sixth inputs the outputs of the seventh logical block are connected respectively to the second and sixth inputs and outputs of the eighth logical block, the first and eighth logical blocks contain the first to sixth wave filters, the second to the fourth, and also the sixth and eighth logical blocks additionally contain a seventh wave filter, in the first and eighth logical blocks the multiplexed input-output of the first wave filter is the first input-output of the corresponding logical block, the first and second demultiplexed inputs and outputs of the first wave filter are connected respectively to the multiplexed inputs the outputs of the second and third wave filters, the first and second demultiplexed inputs and outputs of the third wave filter are connected respectively but with the multiplexed inputs and outputs of the fifth and fourth wave filters, the second demultiplexed input-output of the second wave filter is connected to the multiplexed input-output of the sixth wave filter, the first and second demultiplexed inputs and outputs of the sixth wave filter are connected to the seventh and sixth inputs and outputs of the corresponding logic block, the first and second demultiplexed inputs / outputs of the fifth wave filter are connected respectively to the fifth and fourth inputs-you by the odes of the corresponding logical unit, the first and second demultiplexed inputs and outputs of the fourth wave filter are connected respectively to the third and second inputs and outputs of the corresponding logical unit, in the first and fifth logical units, the first demultiplexed input and output of the second wave filter is connected to the eighth input-output of the corresponding logical block, in the second - fourth and sixth - eighth logical blocks, the first demultiplexed input-output of the second wave filter is connected to the mult a seventh wave filter multiplexed input-output, the first and second demultiplexed inputs and outputs of which are connected to the ninth and eighth inputs and outputs of the corresponding logic block, in the first and eighth logical blocks, the first and third wave filters are respectively wave filters of the first and third types, the fourth - the sixth wave filters are, respectively, the wave filters of the seventh, sixth and fifth types, in the second - fourth and sixth - eighth logical blocks of the seventh Olnova wave filter is a filter of the fourth type. 2. The optical signal switch according to claim 1, characterized in that the wave filters of the first to seventh types operate with optical signals with wavelengths numbered in the form of a number of λ1, λ2, λ3, ..., the wavelength increases uniformly as its number increases, multiplexed the input-output of the wave filter of the first type is transparent for optical signals with wavelengths λ1, λ2, λ3, ..., the first demultiplexed input-output of the wave filter of the first type is transparent for optical signals with wavelengths λ1, λ3, λ5, ... and not about transparent for optical signals with wavelengths λ2, λ4, λ6, ..., the second demultiplexed input-output of the wave filter of the first type is transparent for optical signals with wavelengths with numbers λ2, λ4, λ6, ... and opaque for optical signals with wavelengths with numbers λ1, λ3, λ5, ..., the multiplexed input-output of the wave filter of the second type is transparent for optical signals with wavelengths with the numbers λ1, λ3, λ5, ..., the first demultiplexed input and output of the wave filter of the second type is transparent for optical signals with lengths at ln with numbers λ1, λ5, λ9, ... and opaque for optical signals with wavelengths with numbers λ3, λ7, λ11, ..., the second demultiplexed input-output of a wave filter of the second type is transparent for optical signals with wavelengths with numbers λ3, λ7, λ11, ... and opaque for optical signals with wavelengths λ1, λ5, λ9, ..., the multiplexed input-output of a wave filter of the third type is transparent for optical signals with wavelengths with numbers λ2, λ4, λ6, ..., the first demultiplexed input the output of the wave filter of the third type is transparent to For optical signals with wavelengths λ2, λ6, λ10, ... and opaque for optical signals with wavelengths λ4, λ8, λ12, ..., the second demultiplexed input-output wave filter of the third type is transparent for optical signals with wavelengths with numbers λ4, λ8, λ12, ... and opaque for optical signals with wavelengths with numbers λ2, λ6, λ10, ..., the multiplexed input-output wave filter of the fourth type is transparent for optical signals with wavelengths with numbers λ1, λ5, λ9, ... The first demultiplexed wave I / O the fourth filter type is transparent for optical signals with wavelengths λ1, λ9, ... and opaque for optical signals with wavelengths λ5, λ13, ..., the second demultiplexed input-output wave filter of the fourth type is transparent for optical signals with wavelengths with numbers λ5, λ13, ... and opaque for optical signals with wavelengths with numbers λ1, λ9, ..., the fifth-type multiplexed input-output of a wave filter of the type transparent for optical signals with wavelengths with numbers λ3, λ7, λ11, ..., the first demultiple fifth type wave filter input-output is transparent for optical signals with wavelengths λ3, λ11, ... and opaque for optical signals with wavelengths λ7, λ15, ..., the second demultiplexed fifth type wave filter input-output is transparent for optical signals with wavelengths with the numbers λ7, λ15, ... and opaque for optical signals with wavelengths with the numbers λ3, λ11, ..., the multiplexed input-output wave filter of the sixth type is transparent for optical signals with wavelengths with the numbers λ2, λ6, λ10,, the first demultiplexed input-output of the wave filter of the sixth type is transparent for optical signals with wavelengths with the numbers λ2, λ10, ... and opaque for optical signals with wavelengths with the numbers λ6, λ14, ..., the second demultiplexed input and output of the wave filter of the sixth is transparent for optical signals with wavelengths λ6, λ14, ... and opaque for optical signals with wavelengths λ2, λ10, ..., the multiplexed input-output of the seventh type wave filter is transparent for optical signals with lengths of wave number λ4, λ8, λ12, ..., the first demultiplexed input-output of the seventh type wave filter is transparent for optical signals with wavelengths λ4, λ12, ... and opaque for optical signals with wavelengths λ8, λ16, ..., the second demultiplexed input-output of a wave filter of the seventh type is transparent for optical signals with wavelengths λ8, λ16, ... and opaque for optical signals with wavelengths λ4, λ12 ...

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