CN201138412Y - 2X2 wave length selective cross connector - Google Patents

Abstract

A selective cross connector with 2*2 light wave length belongs to the field of light communication devices; the utility model is to simplify the wave length selection control and reduce the light signal consumption, which is good for the integration of selective cross connecting devices; the utility model includes a Mach-Zehnder interferometer with periodic Bragg gratings with the same characteristics as two arms, an upper and a lower 1*2 optical switches, an upper and a lower Y-shaped combiners and a pair of crossed light wave leads which are totally symmetrical; the input terminals of the upper and the lower 1*2 optical switches are taken as the two input terminals of the utility model; the control terminals of the upper and the lower 1*2 optical switches are taken as the two control signal input terminals of the utility model; the output terminals of the upper and the lower Y-shaped combiners are taken as the two output terminals of the utility model. The selective cross connector has the advantages of easy control, compact structure and high modularization, and can conduct multi-terminal and multi-wave length expansion via internet; all the devices are easy to be integrated by the wave guide devices and can be used for very short distance wavelength-division multiplex optical internet.

Description

2 * 2 wavelength selective cross-connects

Technical field

The utility model belongs to optic communication device, the optic communication device in the particularly full optical wavelength-division multiplex communication network.

Background technology

The traditional communication net is based on electronic technology, because the speed of electron device further improves speed system cost will be increased greatly more and more near the physics and the technical limit.Eliminate in the present optical fiber transmission network owing to there being the electronic bottleneck that light/electricity-electricity/light conversion causes, its outlet is to adopt broadband, high capacity, wavelength-division multiplex all optical communication technology at a high speed.In the wavelength-division multiplex all-optical communication network, do not have the link of light-electrical-optical conversion, different network nodes distributes different optical wavelengths, and optical wavelength is directly used in the node route.Optical cross-connect (OXC) is undoubtedly the core devices of this all-optical wave-length route network.What do not have wavelength conversion capability in the optical cross-connect is called wavelength selective cross-connects (WSXC), and what wavelength conversion capability was arranged is called wavelength Conversion cross-connect (WIXC).

The patent publication No. CN1307767A that the T. of Ellison Telephone Co., Ltd Bille August pine proposes, name are called the invention of " method and wavelength-selective switches that are used to exchange optical wavelength " and are selected decussate texture, phase control element and be connected waveguide to constitute by multiple-mode interfence waveguide, wavelength; T. the patent publication No. CN1249823A that proposes of Bille August pine, the invention that name is called " optical devices " are made of multiple-mode interfence waveguide, phase control element and Bragg grating.Foregoing invention utilizes phase control element to realize the wavelength selection, the change phase place that requires each phase control element is to identical degree, belong to analog control method, it is difficult in realization, requirement is carried out phase compensation to the wavelength of phase distortion, and not matching of each phase control element phase change will have a strong impact on the performance of device.Secondly, foregoing invention adopts multiple-mode interfence (MMI) principle to carry out beam split, requires input optical signal power to distribute at several output terminals, causes the power reduction of light signal.

Summary of the invention

The utility model proposes a kind of 2 * 2 optical wavelength and select cross-connect, purpose is to simplify wavelength selection control, reduces the loss of optical signal power, and helps realizing the integrated of multiport, multi-wavelength selection cross connection device.

A kind of 2 * 2 optical wavelength of the present utility model are selected cross-connect, comprise that one is the Mach-Zehnder interferometer of two arms with the identical periodic bragg gratings of characteristic, has complete symmetrical structure, it is characterized in that: it also comprises upper and lower 1 * 2 photoswitch (1), upper and lower Y shape wave multiplexer and a pair of cross one another optical waveguide; Described upper and lower 1 * 2 photoswitch respectively has a light input end mouth, two optical output ports and a control port; Described upper and lower Y shape wave multiplexer respectively has an optical output port and two light input end mouths; By the identical periodic bragg gratings of characteristic is the port that the Mach-Zehnder interferometer of two arms has four symmetries; (2) left port of coupling mechanism links to each other on last 1 * 2 photoswitch output terminal and the Mach-Zehnder interferometer, and another output terminal of last 1 * 2 photoswitch connects an input port of Y shape wave multiplexer down by optical waveguide; (3) down under output terminal of 1 * 2 photoswitch and the Mach-Zehnder interferometer left port of coupling mechanism link to each other, another output terminal of 1 * 2 photoswitch connects an input port of Y shape wave multiplexer by optical waveguide down; (4) right output port of coupling mechanism links to each other on another input port of going up Y shape wave multiplexer and the Mach-Zehnder interferometer, and the right output port of coupling mechanism links to each other under another input port of following Y shape wave multiplexer and the Mach-Zehnder interferometer; (5) input port of upper and lower 1 * 2 photoswitch is as two input ends of 2 * 2 wavelength selective cross-connects; The control port of upper and lower 1 * 2 photoswitch is as two signal input end of 2 * 2 wavelength selective cross-connects; The output terminal of upper and lower Y shape wave multiplexer is as two output terminals of 2 * 2 wavelength selective cross-connects.

Described 2 * 2 optical wavelength are selected cross-connect, and it is characterized in that: the structure and the characteristic of described upper and lower 1 * 2 photoswitch are identical; The structure and the characteristic of described upper and lower Y shape wave multiplexer are identical; Described two cross one another optical waveguide physical dimensions and physical characteristics are identical.

The utility model can be selected the centre wavelength decision of cross-coupled optical wavelength by the periodic bragg gratings that constitutes Mach-Zehnder interferometer two arms, by control to 1 * 2 photoswitch, can realize cross connection to selected optical wavelength, the control signal of 1 * 2 photoswitch has only " opening " and " pass " two states, the light signal of input optionally can be incorporated into a port in two output port, belong to digital control method, and do not have the distribution of optical signal power at a plurality of ports.The utility model can be realized the optical wavelength selection cross-connect of multiport multi-wavelength by the multistage network ways of connecting.Single wavelength 2 of a nonobstructive ^m* 2 ^mWavelength selective cross-connects can be by (2m-1) 2 ^M-1The multistage network interconnection that individual identical the utility model module is passed through the 2m-1 level constitutes; The N wavelength 2 of a nonobstructive ^m* 2 ^mWavelength selective cross-connects can be by single wavelength 2 of the nonobstructive of N different wave length ^m* 2 ^mThe wavelength selective cross-connects module is in series.Multistage interconnection can adopt multilevel interconnect structures such as Banyan or Benes.Shuffle and the wavelength selective cross-connects of left shuffle interconnection network has the modular construction of height based on the right side, be convenient to realize the integrated of device.

The utility model control is simple, compact conformation, high modularization, be convenient to integratedly, and transparent to non-control light wave can carry out the expansion of multiport multi-wavelength by interconnection network.The multiport multi-wavelength selection cross-connect that is formed by the utility model expansion is the core devices of wavelength division multiplexed optical network.The all available waveguide device of the various devices that the utility model adopted realizes, is easy to realize integrated, can be used between the photoelectricity printed wiring board, between the photoelectric chip and the very short distance wavelength-division multiplex optical interconnection network between each IP kernel of chip internal.

Description of drawings

Fig. 1. the utility model structural representation;

Fig. 2 is based on 4 * 4 single wavelength selective cross-connects synoptic diagram of right shuffling network;

Fig. 3 is based on 2 of right shuffling network * 2 four wavelength selective cross-connects synoptic diagram;

Fig. 4 is based on 4 * 4 liang of wavelength selective cross-connects synoptic diagram of right shuffling network.

Embodiment

As shown in Figure 1, the utility model is connected and composed by following components:

(1) upper and lower 1 * 2 photoswitch: last 1 * 2 photoswitch 20 has an input port 21, two 22,23 and control ports 24 of output port; By changing the control signal that control port 24 is applied, can realize that input port 21 is connected with the selectivity conducting of one of them output port in two output ports 22,23.Down 1 * 2 photoswitch 25 has an input port 26, two 27,28 and control ports 29 of output port; By changing the control signal that control port 29 is applied, can realize that input port 26 is connected with the selectivity conducting of one of them output port in two output ports 27,28.

(2) upper and lower Y shape wave multiplexer: going up Y shape wave multiplexer 30 has the light signal in 33, two input ports of 31,32 and output ports of two input ports can guide to output port simultaneously.Following Y shape wave multiplexer 34 has 35,36 and output ports 37 of two input ports.

(3) a pair of optical waveguide 4: each optical waveguide 4 can be delivered to another port with the light signal that a port is introduced.

(4) Mach-Zehnder interferometers 1 based on Bragg grating have the two-dimensional symmetric structure.If will be somebody's turn to do Mach-Zehnder interferometer 1 level or perpendicular bisected based on Bragg grating, wherein half is second half mirror image; This has identical centre wavelength and other characteristic based on the periodic bragg gratings 11 on two arms of the Mach-Zehnder interferometer 1 of Bragg grating.Should four ports be arranged based on the Mach-Zehnder interferometer 1 of Bragg grating, draw from two photo-couplers respectively.Near the light wave of light wave medium wavelength Bragg grating 11 centre wavelengths of being introduced by the left port 13 of coupling mechanism 12 on the Mach-Zehnder interferometer is introduced to the right output port 14 of coupling mechanism on the Mach-Zehnder interferometer, and the light wave of other wavelength is introduced to the right output port 17 of coupling mechanism 15 under the Mach-Zehnder interferometer; Near the light wave of light wave medium wavelength Bragg grating 11 centre wavelengths of being introduced by the left port 16 of coupling mechanism 15 under the Mach-Zehnder interferometer is introduced to the right output port 17 of coupling mechanism 15 under the Mach-Zehnder interferometer, and the light wave of other wavelength is introduced to the right output port 14 of coupling mechanism 12 on the Mach-Zehnder interferometer.

The port connection situation of above device is: the left port 13 of coupling mechanism 12 links to each other on output terminal 22 of last 1 * 2 photoswitch 20 and the Mach-Zehnder interferometer, another output terminal 23 of last 1 * 2 photoswitch 20 connects an input port 36 of Y shape wave multiplexer 34 down by optical waveguide 4, down the left port 16 of coupling mechanism 15 links to each other under output terminal 27 of 1 * 2 photoswitch 25 and the Mach-Zehnder interferometer, another output terminal 28 of 1 * 2 photoswitch 25 connects an input port 32 going up Y shape wave multiplexer 30 by optical waveguide 4 down, the right output port 14 of coupling mechanism 12 links to each other on another input port 31 of last Y shape wave multiplexer 30 and the Mach-Zehnder interferometer, the right output port 17 of coupling mechanism 15 links to each other under another input port 35 of following Y shape wave multiplexer 34 and the Mach-Zehnder interferometer, on, the input port 21 of following 1 * 2 photoswitch, 26 two input ends as 2 * 2 wavelength selective cross-connects; The control port 24,29 of upper and lower 1 * 2 photoswitch is as two signal input end of 2 * 2 wavelength selective cross-connects; The output terminal 33,37 of upper and lower Y shape wave multiplexer is as two output terminals of 2 * 2 wavelength selective cross-connects.

For ease of describing principle of work of the present utility model, the spy makes following agreement:

(1) port label: I ₁Represent input port, the I of going up of the present utility model ₂Expression is input port down, O ₁Output port in the expression, O ₂Expression is output port down; Simultaneously, I ₁, I ₂, O ₁, O ₂Also represent the set of the existing optical wavelength of corresponding port.

(2) upper and lower 1 * 2 photoswitch of the present utility model is controlled with same control signal K.Control signal K is a digital signal, has " opening " and " pass " two states: when control signal is " opening ", be designated as K, the lightwave signal that the input end of last 1 * 2 photoswitch is introduced is guided to down the output terminal of Y shape wave multiplexer through optical waveguide, and the lightwave signal of the input end of 1 * 2 photoswitch introducing is guided to the output terminal of Y shape wave multiplexer through optical waveguide down; When the control signal of 1 * 2 photoswitch is " pass ", be designated as K, the lightwave signal medium wavelength of the input end of last 1 * 2 photoswitch introducing at this moment is introduced to the output terminal of Y shape wave multiplexer near the light wave the Bragg grating centre wavelength, the light wave of other wavelength is introduced to down the output terminal of Y shape wave multiplexer, near the light wave of lightwave signal medium wavelength Bragg grating centre wavelength of the input end of 1 * 2 photoswitch introducing is introduced to the output terminal of Y shape wave multiplexer down down, and the light wave of other wavelength is introduced to the output terminal of Y shape wave multiplexer.

(3) centre wavelength of the periodic bragg gratings of two arms of Mach-Zehnder interferometer is λ _m, m is a positive integer, is used to indicate and distinguishes different wavelength.

Under the situation of above-mentioned agreement, the utility model can be described with following relational expression:

$\left[\begin{array}{c}{O}_1\\ O_2\end{array}\right]=\left[\begin{array}{cc}\stackrel{\‾}{K}& K\\ K& \stackrel{\‾}{K}\end{array}\right]\left[\begin{array}{c}{I}_1\∩\left\{{\mathrm{\λ}}_m\right\}\\ I_2\∩\left\{{\mathrm{\λ}}_m\right\}\end{array}\right]+\left[\begin{array}{cc}0& 1\\ 1& 0\end{array}\right]\left[\begin{array}{c}{I}_1\backslash (I_1\∩\{{\mathrm{\λ}}_m\left\}\right)\\ I_2\backslash (I_2\∩\{{\mathrm{\λ}}_m\left\}\right)\end{array}\right]---\left(1\right)$

By to 2 * 2 matrixes $\left[\begin{array}{cc}\stackrel{\‾}{K}& K\\ K& \stackrel{\‾}{K}\end{array}\right]$ Be configured, can realize selected wavelength X _mCarry out the switching of output port; 2 * 2 matrixes $\left[\begin{array}{cc}0& 1\\ 1& 0\end{array}\right]$ The whereabouts of the last light wave in back is screened in expression near the light wave of optical wavelength in input port Bragg grating centre wavelength; The utility model can't carry out the passage switching controls to non-exchange wavelength, can only carry out passage to non-wavelength switching in the two input end light waves and intersect.

2 * 1 matrixes $\left[\begin{array}{c}{I}_1\∩\left\{{\mathrm{\λ}}_m\right\}\\ I_2\∩\left\{{\mathrm{\λ}}_m\right\}\end{array}\right]$ Expression is screened near the light wave of optical wavelength in input port Bragg grating centre wavelength; 2 * 1 matrixes $\left[\begin{array}{c}{I}_1\backslash (I_1\∩\{{\mathrm{\λ}}_m\left\}\right)\\ I_2\backslash (I_2\∩\{{\mathrm{\λ}}_m\left\}\right)\end{array}\right]$ Expression is screened the last light wave in back near the light wave of optical wavelength in input port Bragg grating centre wavelength.

Formula (1) has been carried out complete description to principle of work of the present utility model.It shows, no matter the state of upper and lower 1 * 2 photoswitch how, the utility model is with input end I ₁Introduce the non-wavelength switching I of light wave ₁(I ₁∩ { λ _m) guide to output terminal O ₂, with input end I ₂Introduce the non-wavelength switching I of light wave ₂(I ₂∩ { λ _m) guide to output terminal O ₁When switch controlling signal was " opening ", the utility model was with input end I ₁Introduce the wavelength switching I of light wave ₁∩ { λ _mGuide to output terminal O ₂, with input end I ₂Introduce the wavelength switching I of light wave ₂∩ { λ _mGuide to output terminal O ₁When switch controlling signal was " pass ", the utility model was with input end I ₁Introduce the exchange wavelength I of light wave ₁∩ { λ _mGuide to output terminal O ₁, with input end I ₂Introduce the exchange wavelength I of light wave ₂∩ { λ _mGuide to output terminal O ₂

Multiport expansion of the present utility model:

Utilize multistage interconnection can realize multiport expansion of the present utility model.2 ^m* 2 ^mSingle wavelength nonobstructive selection cross-connect can be by (2m-1) 2 ^M-1The multistage network interconnection that individual identical the utility model module is passed through the 2m-1 level constitutes.M is a positive integer.Multistage interconnection can adopt multilevel interconnect structures such as Banyan, Benes.Wherein shuffle on the right side, and the multilevel interconnect structure that shuffle on a left side makes each grade have identical structure.This characteristic makes 2 ^m* 2 ^mSingle wavelength nonobstructive selects cross-connect to have more modular structure.Fig. 2 is nonobstructive 4 * 4 single wavelength selective cross-connects structural drawing based on right shuffle interconnection network, and the mathematical description of its principle of work is:

$\left[\begin{array}{c}{O}_1\\ O_2\\ O_3\\ O_4\end{array}\right]=\left[\begin{array}{cccc}{K}_{13}{K}_{12}{K}_{11}& K_{13}{\stackrel{\‾}{K}}_{12}{K}_{21}& K_{13}{K}_{12}{\stackrel{\‾}{K}}_{11}& K_{13}{\stackrel{\‾}{K}}_{12}{\stackrel{\‾}{K}}_{21}\\ {\stackrel{\‾}{K}}_{13}{K}_{12}{K}_{11}& {\stackrel{\‾}{K}}_{13}{\stackrel{\‾}{K}}_{12}{K}_{21}& {\stackrel{\‾}{K}}_{13}{K}_{12}{\stackrel{\‾}{K}}_{11}& {\stackrel{\‾}{K}}_{13}{\stackrel{\‾}{K}}_{12}{\stackrel{\‾}{K}}_{21}\\ K_{23}{\stackrel{\‾}{K}}_{12}{K}_{11}& K_{23}{K}_{12}{K}_{21}& K_{23}{\stackrel{\‾}{K}}_{12}{\stackrel{\‾}{K}}_{11}& K_{23}{K}_{12}{\stackrel{\‾}{K}}_{21}\\ {\stackrel{\‾}{K}}_{23}{\stackrel{\‾}{K}}_{12}{K}_{11}& {\stackrel{\‾}{K}}_{23}{K}_{12}{K}_{21}& {\stackrel{\‾}{K}}_{23}{\stackrel{\‾}{K}}_{12}{\stackrel{\‾}{K}}_{11}& {\stackrel{\‾}{K}}_{23}{K}_{12}{\stackrel{\‾}{K}}_{21}\end{array}\right]\left[\begin{array}{c}(I_1\∩\{{\mathrm{\λ}}_m\left\}\right)\\ (I_2\∩\{{\mathrm{\λ}}_m\left\}\right)\\ (I_3\∩\{{\mathrm{\λ}}_m\left\}\right)\\ (I_4\∩\{{\mathrm{\λ}}_m\left\}\right)\end{array}\right]$

$+\left[\begin{array}{cccc}{\stackrel{\‾}{K}}_{13}{K}_{22}{\stackrel{\‾}{K}}_{11}& {\stackrel{\‾}{K}}_{13}{\stackrel{\‾}{K}}_{22}{\stackrel{\‾}{K}}_{21}& {\stackrel{\‾}{K}}_{13}{K}_{22}{K}_{11}& {\stackrel{\‾}{K}}_{13}{\stackrel{\‾}{K}}_{22}{K}_{21}\\ K_{13}{K}_{22}{\stackrel{\‾}{K}}_{11}& K_{13}{\stackrel{\‾}{K}}_{22}{\stackrel{\‾}{K}}_{21}& K_{13}{K}_{22}{K}_{11}& K_{13}{\stackrel{\‾}{K}}_{22}{K}_{21}\\ {\stackrel{\‾}{K}}_{23}{\stackrel{\‾}{K}}_{22}{\stackrel{\‾}{K}}_{11}& {\stackrel{\‾}{K}}_{23}{K}_{22}{\stackrel{\‾}{K}}_{21}& {\stackrel{\‾}{K}}_{23}{\stackrel{\‾}{K}}_{22}{K}_{11}& {\stackrel{\‾}{K}}_{23}{K}_{22}{K}_{21}\\ K_{23}{\stackrel{\‾}{K}}_{22}{\stackrel{\‾}{K}}_{11}& K_{23}{K}_{22}{\stackrel{\‾}{K}}_{21}& K_{23}{\stackrel{\‾}{K}}_{22}{K}_{11}& K_{23}{K}_{22}{K}_{21}\end{array}\right]\left[\begin{array}{c}(I_1\∩\{{\mathrm{\λ}}_m\left\}\right)\\ (I_2\∩\{{\mathrm{\λ}}_m\left\}\right)\\ (I_3\∩\{{\mathrm{\λ}}_m\left\}\right)\\ (I_4\∩\{{\mathrm{\λ}}_m\left\}\right)\end{array}\right]$

$+\left[\begin{array}{cccc}1& 0& 0& 0\\ 0& 0& 1& 0\\ 0& 1& 0& 0\\ 0& 0& 0& 1\end{array}\right]\left[\begin{array}{c}{I}_1\backslash (I_1\∩\{{\mathrm{\λ}}_m\left\}\right)\\ I_2\backslash (I_2\∩\{{\mathrm{\λ}}_m\left\}\right)\\ I_3\backslash (I_3\∩\{{\mathrm{\λ}}_m\left\}\right)\\ I_4\backslash (I_4\∩\{{\mathrm{\λ}}_m\left\}\right)\end{array}\right]$

Multi-wavelength expansion of the present utility model:

The Bragg grating that N centre wavelength is different constitutes 2 * 2 single wavelength selective cross-connects and is together in series and can realizes N wavelength spread of the present utility model.N is a positive integer.Fig. 3 is the nonobstructive 2 * 2 four wavelength selective cross-connects structural representations based on right shuffle interconnection network, can be described as of its principle of work:

$\left[\begin{array}{c}{O}_1\\ O_2\end{array}\right]=\left[\begin{array}{cc}{K}_1& {\stackrel{\‾}{K}}_1\\ {\stackrel{\‾}{K}}_1& K_1\end{array}\right]\left[\begin{array}{c}{I}_1\∩\left\{{\mathrm{\λ}}_1\right\}\\ I_2\∩\left\{{\mathrm{\λ}}_1\right\}\end{array}\right]+\left[\begin{array}{cc}{K}_2& {\stackrel{\‾}{K}}_2\\ {\stackrel{\‾}{K}}_2& K_2\end{array}\right]\left[\begin{array}{c}{I}_1\∩\left\{{\mathrm{\λ}}_2\right\}\\ I_2\∩\left\{{\mathrm{\λ}}_2\right\}\end{array}\right]+\left[\begin{array}{cc}{K}_3& {\stackrel{\‾}{K}}_3\\ {\stackrel{\‾}{K}}_3& K_3\end{array}\right]\left[\begin{array}{c}{I}_1\∩\left\{{\mathrm{\λ}}_3\right\}\\ I_2\∩\left\{{\mathrm{\λ}}_3\right\}\end{array}\right]$

$+\left[\begin{array}{cc}{K}_4& {\stackrel{\‾}{K}}_4\\ {\stackrel{\‾}{K}}_4& K_4\end{array}\right]\left[\begin{array}{c}{I}_1\∩\left\{{\mathrm{\λ}}_4\right\}\\ I_2\∩\left\{{\mathrm{\λ}}_4\right\}\end{array}\right]+\left[\begin{array}{cc}1& 0\\ 0& 1\end{array}\right]\left[\begin{array}{c}{I}_1\backslash (I_1\∩{\{\mathrm{\λ}}_1,{\mathrm{\λ}}_2,{\mathrm{\λ}}_3,{\mathrm{\λ}}_4\})\\ I_2\backslash (I_2\∩\{{\mathrm{\λ}}_1,{\mathrm{\λ}}_2,{\mathrm{\λ}}_3,{\mathrm{\λ}}_4\left\}\right)\end{array}\right]$

Multiport multi-wavelength expansion of the present utility model:

N the different Bragg grating of centre wavelength constituted 2 ^m* 2 ^mWavelength selective cross-connects is together in series and can realizes N wavelength 2 of the present utility model ^m* 2 ^mThe port expansion, m, N are positive integer.Fig. 4 is 4 * 4 liang of wavelength selective cross-connects structural representations of nonobstructive based on right shuffle interconnection network, and its principle of work can be described as:

$\left[\begin{array}{c}{O}_1\\ O_2\\ O_3\\ O_4\end{array}\right]=\left[\begin{array}{cccc}{K}_{16}{K}_{15}{K}_{14}& K_{16}{\stackrel{\‾}{K}}_{15}{K}_{24}& K_{16}{K}_{15}{\stackrel{\‾}{K}}_{14}& K_{16}{\stackrel{\‾}{K}}_{15}{\stackrel{\‾}{K}}_{24}\\ {\stackrel{\‾}{K}}_{16}{K}_{15}{K}_{14}& {\stackrel{\‾}{K}}_{16}{\stackrel{\‾}{K}}_{15}{K}_{24}& {\stackrel{\‾}{K}}_{16}{K}_{15}{\stackrel{\‾}{K}}_{14}& {\stackrel{\‾}{K}}_{16}{\stackrel{\‾}{K}}_{15}{\stackrel{\‾}{K}}_{24}\\ K_{26}{\stackrel{\‾}{K}}_{15}{K}_{14}& K_{26}{K}_{15}{K}_{24}& K_{26}{\stackrel{\‾}{K}}_{15}{\stackrel{\‾}{K}}_{14}& K_{26}{K}_{15}{\stackrel{\‾}{K}}_{24}\\ {\stackrel{\‾}{K}}_{26}{\stackrel{\‾}{K}}_{15}{K}_{14}& {\stackrel{\‾}{K}}_{26}{K}_{15}{K}_{24}& {\stackrel{\‾}{K}}_{26}{\stackrel{\‾}{K}}_{15}{\stackrel{\‾}{K}}_{14}& {\stackrel{\‾}{K}}_{26}{K}_{15}{\stackrel{\‾}{K}}_{24}\end{array}\right]\left[\begin{array}{c}(I_1\∩\{{\mathrm{\λ}}_2\left\}\right)\\ (I_2\∩\{{\mathrm{\λ}}_2\left\}\right)\\ (I_3\∩\{{\mathrm{\λ}}_2\left\}\right)\\ (I_4\∩\{{\mathrm{\λ}}_2\left\}\right)\end{array}\right]$

$+\left[\begin{array}{cccc}{\stackrel{\‾}{K}}_{16}{K}_{25}{\stackrel{\‾}{K}}_{14}& {\stackrel{\‾}{K}}_{16}{\stackrel{\‾}{K}}_{25}{\stackrel{\‾}{K}}_{24}& {\stackrel{\‾}{K}}_{16}{K}_{25}{K}_{14}& {\stackrel{\‾}{K}}_{16}{\stackrel{\‾}{K}}_{25}{K}_{24}\\ K_{16}{K}_{25}{\stackrel{\‾}{K}}_{14}& K_{16}{\stackrel{\‾}{K}}_{25}{\stackrel{\‾}{K}}_{24}& K_{16}{K}_{25}{K}_{14}& K_{16}{\stackrel{\‾}{K}}_{25}{K}_{24}\\ {\stackrel{\‾}{K}}_{26}{\stackrel{\‾}{K}}_{25}{\stackrel{\‾}{K}}_{14}& {\stackrel{\‾}{K}}_{26}{K}_{25}{\stackrel{\‾}{K}}_{24}& {\stackrel{\‾}{K}}_{26}{\stackrel{\‾}{K}}_{25}{K}_{14}& {\stackrel{\‾}{K}}_{26}{K}_{25}{K}_{24}\\ K_{26}{\stackrel{\‾}{K}}_{25}{\stackrel{\‾}{K}}_{14}& K_{26}{K}_{25}{\stackrel{\‾}{K}}_{24}& K_{26}{\stackrel{\‾}{K}}_{25}{K}_{14}& K_{26}{K}_{25}{K}_{24}\end{array}\right]\left[\begin{array}{c}(I_1\∩\{{\mathrm{\λ}}_2\left\}\right)\\ (I_2\∩\{{\mathrm{\λ}}_2\left\}\right)\\ (I_3\∩\{{\mathrm{\λ}}_2\left\}\right)\\ (I_4\∩\{{\mathrm{\λ}}_2\left\}\right)\end{array}\right]$

$+\left[\begin{array}{cccc}{K}_{13}{K}_{12}{K}_{11}& K_{13}{\stackrel{\‾}{K}}_{12}{K}_{21}& K_{13}{K}_{12}{\stackrel{\‾}{K}}_{11}& K_{13}{\stackrel{\‾}{K}}_{12}{\stackrel{\‾}{K}}_{21}\\ K_{23}{\stackrel{\‾}{K}}_{12}{K}_{11}& K_{23}{K}_{12}{K}_{21}& K_{23}{\stackrel{\‾}{K}}_{12}{\stackrel{\‾}{K}}_{11}& K_{23}{K}_{12}{\stackrel{\‾}{K}}_{21}\\ {\stackrel{\‾}{K}}_{13}{K}_{12}{K}_{11}& {\stackrel{\‾}{K}}_{13}{\stackrel{\‾}{K}}_{12}{K}_{21}& {\stackrel{\‾}{K}}_{13}{K}_{12}{\stackrel{\‾}{K}}_{11}& {\stackrel{\‾}{K}}_{13}{\stackrel{\‾}{K}}_{12}{\stackrel{\‾}{K}}_{21}\\ {\stackrel{\‾}{K}}_{23}{\stackrel{\‾}{K}}_{12}{K}_{11}& {\stackrel{\‾}{K}}_{23}{K}_{12}{K}_{21}& {\stackrel{\‾}{K}}_{23}{\stackrel{\‾}{K}}_{12}{\stackrel{\‾}{K}}_{11}& {\stackrel{\‾}{K}}_{23}{K}_{12}{\stackrel{\‾}{K}}_{21}\end{array}\right]\left[\begin{array}{c}(I_1\∩\{{\mathrm{\λ}}_1\left\}\right)\\ (I_2\∩\{{\mathrm{\λ}}_1\left\}\right)\\ (I_3\∩\{{\mathrm{\λ}}_1\left\}\right)\\ (I_4\∩\{{\mathrm{\λ}}_1\left\}\right)\end{array}\right]$

$+\left[\begin{array}{cccc}{\stackrel{\‾}{K}}_{13}{K}_{22}{\stackrel{\‾}{K}}_{11}& {\stackrel{\‾}{K}}_{13}{\stackrel{\‾}{K}}_{22}{\stackrel{\‾}{K}}_{21}& {\stackrel{\‾}{K}}_{13}{K}_{22}{K}_{11}& {\stackrel{\‾}{K}}_{13}{\stackrel{\‾}{K}}_{22}{K}_{21}\\ {\stackrel{\‾}{K}}_{23}{\stackrel{\‾}{K}}_{22}{\stackrel{\‾}{K}}_{11}& {\stackrel{\‾}{K}}_{23}{K}_{22}{\stackrel{\‾}{K}}_{21}& {\stackrel{\‾}{K}}_{23}{\stackrel{\‾}{K}}_{22}{K}_{11}& {\stackrel{\‾}{K}}_{23}{K}_{22}{K}_{21}\\ K_{13}{K}_{22}{\stackrel{\‾}{K}}_{11}& K_{13}{\stackrel{\‾}{K}}_{22}{\stackrel{\‾}{K}}_{21}& K_{13}{K}_{22}{K}_{11}& K_{13}{\stackrel{\‾}{K}}_{22}{K}_{21}\\ K_{23}{\stackrel{\‾}{K}}_{22}{\stackrel{\‾}{K}}_{11}& K_{23}{K}_{22}{\stackrel{\‾}{K}}_{21}& K_{23}{\stackrel{\‾}{K}}_{22}{K}_{11}& K_{23}{K}_{22}{K}_{21}\end{array}\right]\left[\begin{array}{c}(I_1\∩\{{\mathrm{\λ}}_1\left\}\right)\\ (I_2\∩\{{\mathrm{\λ}}_1\left\}\right)\\ (I_3\∩\{{\mathrm{\λ}}_1\left\}\right)\\ (I_4\∩\{{\mathrm{\λ}}_1\left\}\right)\end{array}\right]$

$+\left[\begin{array}{cccc}1& 0& 0& 0\\ 0& 1& 0& 0\\ 0& 0& 1& 0\\ 0& 0& 0& 1\end{array}\right]\left[\begin{array}{c}{I}_1\backslash (I_1\∩\{{\mathrm{\λ}}_1,{\mathrm{\λ}}_2\left\}\right)\\ I_2\backslash (I_2\∩\{{\mathrm{\λ}}_1,{\mathrm{\λ}}_2\left\}\right)\\ I_3\backslash (I_3\∩\{{\mathrm{\λ}}_1,{\mathrm{\λ}}_2\left\}\right)\\ I_4\backslash (I_4\∩({\mathrm{\λ}}_1,{\mathrm{\λ}}_2))\end{array}\right].$

Claims (2)

1. an optical wavelength is selected cross-connect, comprise that one is the Mach-Zehnder interferometer of two arms with the identical periodic bragg gratings of characteristic, has complete symmetrical structure, it is characterized in that: it also comprises upper and lower 1 * 2 photoswitch (1), upper and lower Y shape wave multiplexer and a pair of cross one another optical waveguide; Described upper and lower 1 * 2 photoswitch respectively has a light input end mouth, two optical output ports and a control port; Described upper and lower Y shape wave multiplexer respectively has an optical output port and two light input end mouths; By the identical periodic bragg gratings of characteristic is the port that the Mach-Zehnder interferometer of two arms has four symmetries; (2) left port of coupling mechanism links to each other on last 1 * 2 photoswitch output terminal and the Mach-Zehnder interferometer, and another output terminal of last 1 * 2 photoswitch connects an input port of Y shape wave multiplexer down by optical waveguide; (3) down under output terminal of 1 * 2 photoswitch and the Mach-Zehnder interferometer left port of coupling mechanism link to each other, another output terminal of 1 * 2 photoswitch connects an input port of Y shape wave multiplexer by optical waveguide down; (4) right output port of coupling mechanism links to each other on another input port of going up Y shape wave multiplexer and the Mach-Zehnder interferometer, and the right output port of coupling mechanism links to each other under another input port of following Y shape wave multiplexer and the Mach-Zehnder interferometer; (5) input port of upper and lower 1 * 2 photoswitch is as two input ends of 2 * 2 wavelength selective cross-connects; The control port of upper and lower 1 * 2 photoswitch is as two signal input end of 2 * 2 wavelength selective cross-connects; The output terminal of upper and lower Y shape wave multiplexer is as two output terminals of 2 * 2 wavelength selective cross-connects.

2. 2 * 2 optical wavelength as claimed in claim 1 are selected cross-connect, and it is characterized in that: the structure and the characteristic of described upper and lower 1 * 2 photoswitch are identical; The structure and the characteristic of described upper and lower Y shape wave multiplexer are identical; Described two cross one another optical waveguide physical dimensions and physical characteristics are identical.

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