JPS58196796A - Optical switching circuit - Google Patents

Abstract

PURPOSE:To realize the exchange of wide band signals sent and received between multifunction terminals with light as it is, by utilizing a wavelength selection switch and wavelength conversion switch. CONSTITUTION:Signals, which are converted to optical signals of the wavelength of lambda1-lambda4 from the input signals of input terminals 151-154 and multiplexed by a multiplex circuit 133, are inputted to input light waveguides 100-102. At the intersection point of input light waveguides 100-102 and output light waveguides 103-105, wavelength selection switches 106-114 are installed to constitute the first channel switch. A link connecting the first switch and second channel switch composed of wavelength selection switches 124-132 in the same manner is equipped with light conversion switches 115-117. A light selection switch can switch an optional one of light signals of wavelength of lambda1-lambda4, and a light conversion switch can perform conversion between the wavelength of lambda1-lambda4. Signals from terminals 151-154 are exchanged and connected to an optional one of output light wave guides 121-123 with a light signal of the wavelength of lambda1-lambda4 and outputted to one of output terminals 155-158.

Description

[Detailed description of the invention]

The present invention uses optical signals to exchange

[Regarding optical switching circuits] In recent years, with the increasing complexity of office work, the development of so-called multi-functional terminals has increased, with the ability to send and receive not only stationary but also dynamic data, as well as various a-blind data transmissions, in addition to conventional fax services. It is being done. What about multi-functional terminals like this? , there are many of these because the priesthood of the signal that should be received ranges from eMH to several tens of MH*
*A low-lying optical fiber cable is being considered as a transmission path for connecting terminals to each other in place of the conventional coaxial cable. Therefore, in order to provide a wide range of services by organically linking such multi-device terminals and providing a wide range of services, it is possible to provide 51 broadband signals sent and received at each of the temples and shrines in the form of optical fibers. jt sentence bare sentence abbreviation circuit is essential. The purpose of this transmission is to provide an optical conversion circuit that can exchange Li and priest signals sent and received between subscriber terminals as they are. In order to meet the future demand for turtles, we decided to use the traditional 4-cable for the Chibachi, Yamanouchi Nakabaito-1PItI external transmission system, which has an h diameter, wide area, low loss, and funakame. The introduction of a nine-fiber cable transmission system, which has the advantages of nasal sound, is being carried out, but at present, there is no mutual exchange between the optical transmission lines. 5, so-called middle school B21
In 1&, the original signal that was connected to the optical fiber ζ-cable was converted to an electrical signal, and later the AC II connection was made, and the signal was converted to an optical fiber cable. For this reason, each party's fiber cable is connected to an electrical-to-optical conversion circuit or an optical-14A conversion circuit in the above-mentioned relay exchange.
[! I needed one route. A further object of the invention is to provide an optical-to-electrical conversion circuit and an electrical-to-electrical conversion circuit.
An object of the present invention is to provide an optical conversion circuit capable of performing mutual exchange connection between channels between optical transmission lines without requiring an optical conversion circuit. According to the present invention (according to the present invention), a plurality of multi-purpose original signals can be added to the input terminal group, and if necessary, the desired input terminal and the 1!1 length original signal can be output from the output terminal group. The input terminal is connected to each output terminal of the first wavelength selection circuit that selectively outputs the signal to the terminal, and the output terminal of the wavelength selection circuit of -j, respectively. A plurality of wavelength converting switches converting into signals and outputting them, and output terminals of the plurality of wavelength converting switches and output terminals are respectively connected to the input terminal group and the original signal of the desired input terminal and wavelength is connected as required. Furthermore, according to the present invention, the optical switching circuit constituted by the second wavelength selection circuit that selectively outputs the wavelength signal to any output terminal of the output terminal group is neglected.Furthermore, according to the present invention, each input terminal are added respectively, and place Q according to the required I&
A first wavelength conversion switch which converts an optical signal of a wavelength into an optical signal of an arbitrary wavelength and outputs the output, and an input terminal to each output terminal of the first wavelength conversion switch and child group. Connect the group to the desired input terminal and -ylt as needed
A wavelength selection circuit selects and outputs the original signal from an arbitrary output terminal 10 of the output terminal group, and each input terminal t is connected to the cursor group of the wavelength selection circuit, and an optical signal of a desired wavelength is output as necessary. 2, which converts the signal into the original signal of any wavelength and outputs it.
An optical 51 supply circuit is obtained, which is constituted by a group of wavelength conversion switches. Next, this invention (f) will be explained with reference to the drawings. FIG. 1 is a diagram showing a tenth embodiment of the present invention. As shown in FIG. second and third human-powered optical waveguides 100, 101, and 102;
! first, second and third output optical waveguides 103,
104 and tOS, and this output optical waveguide 103°10
4 and 105 and the human-powered optical waveguides 100, 101, and 102, and output a cod signal of 〇 wavelength at each point in the human-powered optical waveguide ft according to necessity.
4 cycles 11i1sK selection output °Wave member selection switch, Chi 10
6, 107゜1 (Ha, 109, 110,
lll, 112, 113, and 1414, and 141h1. &2 and third output optical waveguide 103,
The input terminals are connected to 104 and 105, and the color of the light of the desired wavelength applied to the input terminal according to the 6 sources is ft1L.
Convert to the original signal with the wavelength of ゛1. Part 2 and Theory 3-1
11 technique conversion sui, 115, 116 and 117,
This rattan l, second and third 1!1 pure conversion sui, su11
@4, ill and the sixth input optical waveguide 1111 fitted to the output terminals of 5, 116 and 117, respectively.
, 119 and 12G, and ``this input optical waveguide 118
, 119 and 12G. 5th and $6
The output optical waveguides 121, 122 and 123 must be provided at each intersection of the output optical waveguides 121, 122 and 123 and the human power '14i1[G118, ll'9 and 120]. The original signal of the desired wavelength in the human-powered waveguide is guided according to ! number selection switchers 124 , 125 , 126
, 127 , 128 , 129 . 130, 131 and 132. The third manual optical waveguide 102 shown in FIG. , 3rd J)
Yohi 4th nine fiber cable 134,135゜13
6 and 131 through -C respectively λ3. λ2. Output light wavelength t1 of λ$shame λ! The output terminals of the first, second, third and fourth electro-optical circuits 138, 139, 140 and 141 are connected. - The output optical waveguide 121 with a power ratio of 4 has an optical demultiplexing circuit 142.
When the input terminal of ↓ is connected, this light component IIL'a@
1420 Yamariki Ryoko and l, respectively, 5th. 6th. Turtle 7 and 8th original fiber couple 143,144゜1
45J! Lr1n l through H146, 2nd, M3
tdl and fourth nine-'1 difference circuit 147, 148
, 149 and 150 leprosy have been iht. In FIG. 1, the electrical signals applied to the first, second, third and fourth input terminals 151, 152, 153 and 154K are respectively applied to the first, second, third and fourth input terminals 151, 152, 153 and 154K. @2, 3rd and 4th
λ1. λ3. λ1 and λ. After being converted into the original signal with Ikt, the optical multiplexing $
133 input terminals. The optical multiplex circuit 133 is
λ child added to the input terminal in this way. The original signal having IIl levers of λ鵞, λ$, and A multi-gate device using a microlens and an interference film described on page 1119 can be used.
1c arrogant wave Kaneta II element m number is λ, respectively. After demultiplexing into optical signals with λ, λm and λ techniques, 11!1, second, third and fourth optical-electrical i%1g% 147, 148, 149 and 15
0) Add to the input terminal. 1st. The second, third, and fourth optical-to-electrical conversion circuits 147, 1411, 149, and 150 are configured such that the λ, which is applied to the input terminal,
lλ2. After converting the optical signals having wavelengths of λHatake and λ6 into electrical signals, the first, second, third and eleventh
! 4 output terminals 155, 156, 157 and 15
Output to 8. In FIG. 1W (for example, OI1M between the second input terminal 152 and the fourth output terminal 158 is the electric current applied to the second input terminal 152, which is given by K as follows. The signal is converted to 2! by the second electrical-to-optical conversion circuit wr139.
The second optical fiber cable 135. is converted into an optical signal. [Turn on the multiplex circuit 133 w43
is sent out to the input optical waveguide 102 of. Here, the wave selection switch is set by the control 191 which is not 1 smaller than the 7 of 112! When the wavelength λ is assigned as a wave selection signal tL, the above-mentioned light 4m having a slope λ! transmitted to the third human power optical waveguide 1 (12) is transmitted to the third output optical waveguide 1.
05 and is applied to the input terminal of the third wave pure conversion switch 117. This third ridge conversion switch is 117
1 selects the light beam with wavelength λ applied to the input terminal by the control 1gl path not shown, and 22
i! Long λ4f: Has! The signal is converted into a signal and then sent to the sixth manual optical waveguide 120. Here, when wavelength λ is assigned as the selection wavelength of the wavelength selection switch 126 by a control circuit not shown in the history, the input optical waveguide 1 of 6H
As soon as the light m4#j is sent out to the optical branching circuit 14 and has a wavelength of
2. 4th light via 8th original fiber cable IQ -
Electrical poor exchange 1g [11504D is added to the input terminal. The optical-to-electrical conversion circuit 150 of this turtle 4 converts the above-mentioned original signal having a # handling λ4 into an electrical signal, and outputs it to the fourth output terminal 15.
Output to 8. In this way, the optical communication circuit shown in connection 11 sets four paths for propagating a wide band original signal between the second input terminal 152 and the fourth output terminal tSS. Figure @2 is a diagram excluding the route graph of the first embodiment of the present invention shown in No. 1-. The connection path between the input terminal 152 of the turtle 2 and the fourth output terminal 158 is first connected to the input optical waveguide 102-4% of the input optical waveguide 102 of the 11th QW. Output optical waveguide 105-conversion switch to $3 wave!, 117-6th input optical waveguide 120-@Selection switch. 126-3g4 no ai force ij [tkM 121) and others K
11L3C) Input optical waveguide 102-Wavelength selection switch 1
13-Second Deba leading wave path 104-Second wavelength conversion switch 116-Fifth manual optical fiber guide 119-Wave pure selection switch 125-Fourth Deba leading wave path 121 and third manual optical 4 wave path 102-wavelength selection switch, 114-@1 waveguide 103-first corrugated plate conversion switch 115-
Fourth human-powered optical waveguide 118-Wave selection switch, switch 124-
Two paths of absolute output optical waveguide @121 are considered. The route graph shown in Figure 2 shows this pattern, with symbol 200Fi, human power jt4 wave paths 100, 101 and 1.
02, output nine wave paths 112, 113 and 114, wavelength selective switch 106, 107, 108, 109
, 110, 111° 112, 113 and 114, the wavelength selection circuit is manufactured by Symbol 201 Company and Human Powered Optical Waveguide IHI. 119 and 1201 output optical waveguides 121, 122 and 123, wavelength selective switches 124, 125, 12
6, 127°128, 129, 130, 131
and 132, symbols 202, 203 and 204 represent I11, respectively.
As shown in FIG. 2, representing the length conversion switches 115, 116, and 117, there are three paths for KWIH between a specific Fi input terminal and a specific output terminal in the nine exchange paths in FIG. This VC construction increases the degree of freedom in route selection and reduces the internal blockage rate. Furthermore, in the switching circuit shown in Fig. 1, there are four light wave moxibustions λ1. λ2. The 12 input terminals and the 12 output terminals can be arbitrarily connected by λS and the λ number. In this way, the optical father chivalry circuit described in the book @ Ming also has the advantage of being able to connect many terminals by using a limited number of nine wave cameras and a good internal blockade. . Figure 3 1 [, #! lbi! 3 is a diagram showing a specific example of the pure conversion switch, Chim 15, and Ilb si Yohi 117. According to Figure 3 VC, the wave lever conversion switch that was not used in Xie l- is connected to the sword's monument wave path 1 and the nine-hiro wave path, so 1.
second, third, fourth and fifth wavelength selection elements 301;
31J2, 303, 304 and 305 and this #
11. second, third and fourth wavelength selection elements 301;
The input terminals are connected to the other waveguides of λ, 303 and 304, respectively, and λ, , λ3 . λ, and λ4
The first wave plate has an output wave plate. 2nd, 3rd and 40th wave conversion aggregates 306, 307, 308 and 309;
This first. l521,93g Yohi uta 4 wave and change! The optical multiplexing circuit 310 has a plurality of input terminals connected to the outputs of the elements 30b, 307, 308, and 309 and the other waveguide of the wavelength selection element 305, respectively. In Figure 3, wavelength selection elements 301, 302, 30
3° 304 and 305 are control terminals 311.3, respectively.
312° 313, 314 and 315 K depending on the applied voltage manual light guide @ y, 300 yC applied λ1. λ! , λHatake and the optical surface number t-Ji! of the desired wavelength among the optical signals having wavelengths of λ6! ! An analogy for selective output is the 42nd Japan Society of Applied Physics Academic dA Preliminary Collection 9 P
A LiNbO3 waveguide type optical wave amplitude variable filter having a -M-9 distribution can be used. Also, pump length conversion wheel 306
, 307. 308 and 309 are respectively applied to the input terminals.
--It converts the λ number into its own optical signal. this*
11 conversion elements are IFiFM Journal
of QEvol Qhi-14, No, 11. No
w 1978 pf$10~81m”p n p
n 0ptical Lletectors an
d Light&a+tHng i)
It is possible to use the wave plate conversion Kameko Om as described, but since the wavelength conversion element of Jin is basically treated as 1 & 5, it is impossible to convert from the individual number to an optical signal with a short wavelength. II]
As the limb length conversion main parts 30o, 307, 308 and 309, for example, t, 1Nbu, crystal ◆ non-
With a shaped optical crystal, λ1. λ8. The above @p n p
th 0ptLcal 1Jetcctars
andLight Emselfing IJjod
It is possible to consider a means of converting the wavelengths λ1, λ7, λ, and λ4 into useful optical signals by using a wave converter such as *m'' arrangement. Saba 2 and third wavelength selection elements 302 and 303
Assigning the wavelengths λ and λ as the selected wavelengths of 11. The optical signals having +kt and λ are converted by the second and third pure conversion elements 307 and 30B into jt and shingle having =j&λ and λS, respectively. It is output to the optical waveguide 316. Figure 4 1" Wavelength selective switch 106 with 4 combs in Figure 1
114 and 124-132 assemblies 45'II; FIG. Figure 4 r shows the eI system selection switch, which is smaller than Figure 1. Na is connected to the input optical waveguide 400 and the navy blue 1. The second, third, and fourth wave selectors 4o1, 402, 403, and 404, and this w
, 1, 2nd,! 43i:l, fourth wavelength selection element 40
1, 402° M in the waveguide of external forces 403 and 404
The power of one side is transferred to the 99 waveguide 405, the other power is applied to the 10th output optical waveguide 406, and the second output optical waveguide 407V is connected to the 99 waveguide 405. Road 4
Including 08 and 1. In FIG.
3 and 404 are control terminals 409 and 410, respectively.
Depending on the control 141 voltage applied to 411 and 412, a desired l wavelength t of the optical signals having wavelengths λl, λ, lλ, and λ4 on the input optical waveguide 400 is selected.
05, and even if one person uses optical waveguide 40
Wave photography on 0 λ1. In order to selectively output an optical signal having λ, λS, and λ4 to the second output optical waveguide 407, the wavelength control circuit shown in FIG. Chokiko 401, 402
. FIG. 5 is a diagram showing a second practical example of the present invention. In Figure 1C of Figure 5, the same numbering as in Figure 1 of Collection Fi
Figure 1 and the configuration of Oka! Bottle the tree. As shown in FIG. 5, the second embodiment of the present invention has the first, second, and third TIl lengths 500°, 501, and 50°, respectively, to which wavelength-multiplexed optical signals are applied.
2, and this tIAl, the second liaison and the third wave conversion sui,
The first. Second and third human-powered optical waveguides 503
, 504 and 505, and this human-powered optical waveguide 503
, 504 and 505 intersect with the first, second and third
The output optical waveguides 506, 507, and 50& are provided at each intersection of the output optical waveguides 506, 507, and 508, and the Tsumugijinba leading waveguides 503, 504, and 505, and the previous one input nine-hiro waveguide is provided as necessary. $11 selection switches 509, 510, 511, 512 for selectively outputting an optical signal of a desired wavelength among the wavelengths to an output optical waveguide. 513, 514, 515, 516 and 517, and the above-mentioned No. 1. A fourth. In the tL0 #5 diagram, which includes the fifth and w↓60 wavelength & It is done. '#J added to input terminal 152 of #42
L, 4N, t, the second electric-to-element converter circuit 139 converts it into an optical signal with a length of λ, II: converts it into a second electric-to-element converter circuit 135, and converts it into a second electric-to-element converter circuit. 13
3 and is applied to the third corrugated plate conversion switch 5020 input terminal. This third number length conversion switch 502 selects an optical signal which is applied to the input signal and has a nine wave pure λ under the control of a control circuit (not shown), and for example, a nine wave length conversion switch 502 having a wavelength λ■ Convert to Kuzaru VC@S human power light 4 wave path 5
Send on 05. Here, III slope λ is set as the selection wavelength of the ridge selection switcher 517 according to the control @circle that is not blown.
, or tNI is assigned, and the human-powered optical waveguide 505 of 絽3
The #th optical signal having the plate length λ is guided to the first output optical waveguide 506, and is passed through the fourth wavelength changing switch,
It will be added to 518 human-powered electronics. This fourth wavelength conversion switch 501 selects the original signal having the wavelength λ4 by controlling the control (b) path not shown in the diagram. After exchanging KK,
The receiver is passed to the optical demultiplexing circuit 1420 input terminal. The optical signal t with the leverage λ4 thus despised,
Further, the optical demultiplexing circuit 142. The signal is transmitted to the fourth optical-to-electrical conversion circuit 1500 via the eighth optical fiber cable 146, converted into an electrical signal by the optical-to-electrical conversion circuit 50 VC, and then output to the fourth output terminal 158. Ru. In this way, the nine switching circuits shown in FIG. 5 establish a communication path between the second input terminal 152 and the fourth output terminal 158 for propagating a wide band optical signal. FIG. 6 is a diagram illustrating a route graph of the second embodiment of the small nine-point arrest in FIG. 5. As a method of connecting between the second input terminal 152 and the fourth output terminal 15g in the "supply 5", there is a method of connecting the second input terminal 152 and the fourth output terminal 15g. In addition to converting the signal into an optical signal having tlλ1 . One possible method is to convert λ and λ into their own optical signals. The route graph shown in Figure 6 is 51! 1) OO is +8! The technique conversion switch 502i and the symbol bIJ1 are wave handling conversion switches 518 and 1602, 603, 604 and 605, and the symbol bIJ1 is λ3. λ1. FIG. 6 KIF represents the selection switch 517 when λ and λ are assigned;
5. In the optical switching circuit shown in Figure 5, there are two ways to connect a specific input terminal and a specific output terminal.
*λ3. λ2. There are four methods of converting into optical signals of λ and λ4, and this increases the degree of freedom in path selection and improves the internal blockage rate. 1 Ryoji Figure 5 shows an optical switching circuit with 1 to 4 wave plates λ, λ3. By using λ and λ4, it is possible to arbitrarily connect between the 12 input terminals and the 12 output terminals.
, 302. Even if there is a limit to the number of selective growths 303, 304, and 305, it is possible to carry out corrections between a relatively large number of terminals. As described above, according to the present invention, the light father exchange circuit that allows the exchange of the guangsoshoku wago at each end of the day is neglected. Furthermore, the optical switching circuit according to the present invention has the advantage that it can perform many unresolved operations with a limited number of runs and a good internal S blockage rate. In addition, in the embodiment #1 of the present invention shown in the if diagram, the manual optical waveguides 100 and 1 are used for ease of explanation.
01 and 102 are connected to subscriber terminals on the holding board through optical multiplex circuits, and to the leading waveguides 121, 122 and 123, multiple subscriber terminals are connected through 9-way circuits. Although the explanation was given with reference to Bunkan Yu, optical multiplex repeater transmission lines are connected to the input optical waveguides * 100, 101 and 102 and the output optical waveguides 121, 122 and 123, respectively, and the optical multiplex repeater transmission line is connected to the dark Nayan. It is possible to construct a medium-to-mium switching system that can perform mutual communication between telephones as optical signals. ! According to the second embodiment/example of the present invention shown in FIG. As described above, according to the present invention, there is an advantageous optical switching circuit which is capable of performing interconnection between inverters of an optical multiplex relay transmission line as they are optical signals.

[Brief explanation of the drawing]

FIG.
The figure shows a path graph of the first embodiment of the present invention shown in Fig. 1, and Fig. 3 shows the corrugated plate conversion switch shown in Fig.
1! Specific examples of i, 116 and l17
yri diagram, Figure 4 is a blur on Figure 1, Kubasaka, #! Optionally, FIG. 5 is a diagram that does not include specific examples of children 106 to 114 and 124 to 132, and FIG. It is 1 diagram which shows the +4 path graph of the 2nd Example of this invention. 1067-114' + 124-132 and 509-517 are number long options, Su, 115-11
7, 500 to 502, and 518 to 520 are drum length converters, 133. wave circuit, 147, 1
48, 149 and 150 are light-to-electrical conversion teeth 2 Figure + 3 Figure - + 4 Figure

Claims (1)

[Scope of Claims] (*aO** multiplexed to the 11 input terminal groups and added to the Kukogi name, respectively, and the input terminals and JJT of the courtesans and signals can be sent to any of the output terminal groups according to necessity. The input terminals are respectively connected to the output terminals of ^IC11!, and the input terminals are connected to the output terminals of the wavelength selection path 1 of Mayuki No. 1, and the #support light fl1g of Fk desired is output according to necessity. The Osaka conversion switch of the ljL number which is combined with an optical signal of an arbitrary wavelength,
Each input terminal group is connected to the output electrons of the wavelength conversion switch of the wavelength conversion switch, and the desired input electrons and wave pure optical signal are selectively outputted to any output of the output terminal group according to necessity. , and 2 board length selection circuits. I%@Route. (2) The first wave member JR receives wavelength-multiplexed optical signals to each input terminal and converts the desired 111 optical signals into optical signals of arbitrary wavelengths according to necessity and outputs the signals. Input terminal groups are connected to the output terminals of the switching switch, the group 1, and the wavelength switching switch of the Tsuru 1, respectively, and the input terminal group is required! Accordingly, there is a wavelength selection lR circuit that selectively outputs the optical signal of the input terminal and one member to an arbitrary output terminal of the output terminal group, and each input terminal is connected to the output terminal group of the wavelength selection circuit, respectively.
11) A second optical conversion switch that converts an optical signal of tItk of n+1jl into an arbitrary wave according to 6 and outputs the optical signal, and a group of 1. circuit.