WO2017020197A1 - Interconnecteur optique - Google Patents

Interconnecteur optique Download PDF

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Publication number
WO2017020197A1
WO2017020197A1 PCT/CN2015/085790 CN2015085790W WO2017020197A1 WO 2017020197 A1 WO2017020197 A1 WO 2017020197A1 CN 2015085790 W CN2015085790 W CN 2015085790W WO 2017020197 A1 WO2017020197 A1 WO 2017020197A1
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WO
WIPO (PCT)
Prior art keywords
polarization
light
lcos
optical
xth
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PCT/CN2015/085790
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English (en)
Chinese (zh)
Inventor
闫云飞
赵晗
冯志勇
宗良佳
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2015/085790 priority Critical patent/WO2017020197A1/fr
Priority to CN201580082019.8A priority patent/CN107850736B/zh
Publication of WO2017020197A1 publication Critical patent/WO2017020197A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/27—Optical coupling means with polarisation selective and adjusting means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/35—Optical coupling means having switching means

Definitions

  • Embodiments of the present invention relate to the field of optical communications technologies, and in particular, to an optical cross connector.
  • OTN Optical Transport Network
  • optical switching devices especially optical switching devices and optical wavelength conversion devices.
  • the industry has developed a variety of devices that can be used to achieve optical switching.
  • the optical switch there are mechanical optical switches, polymer switches, semiconductor optical switches, planar optical waveguide optical switches and micro-mechanical optical switches (Micro-Electro-Mechanical System). , MEMS), etc., especially the technology of MEMS optical switches is developing rapidly.
  • the OXC based on MEMS technology mainly uses the micro-motion micro-mirror to fabricate the OXC optical switch matrix.
  • the micro-motion micro-mirror can adopt the up-and-down folding mode, the left-right movement mode or the rotation mode to realize the on and off functions of the switch.
  • Optical switches made by MEMS technology combine mechanical structures, microactuators, and low-light components on the same substrate.
  • Commercial products for MEMS optical switches based on two-dimensional (2D) and three-dimensional (3D) designs are currently available.
  • All the micromirrors and the input and output fibers in the 2D structure MEMS optical switch are located on the same plane, and the micromirror is upright and inverted by the electrostatic actuator or the micromirror is placed in the "on” and “eject” modes in a “seesaw” manner.
  • the working mode is to realize the functions of "on” and “off”.
  • the 2D structure control is simple, but the number of switching ports cannot be made large due to the limitation of the optical path and the area of the micromirror.
  • FIG. 1 is a schematic structural view of a MEMS-based 3D OXC optical switch. All micromirrors are in opposite planes, passing Changing the position of each micromirror to achieve the switching of the optical path, each micromirror needs at least the movable position of the input fiber to be accurately controlled.
  • the 3D structure can realize the exchange of thousands of port numbers, this 3D
  • the friction generated by the OXC structure when using the mechanical structure of the MEMS to control the deflection angle of the micromirror results in poor stability of the chip.
  • Embodiments of the present invention provide an optical cross connector to overcome the problem of poor stability of a chip due to mechanical friction in a manner in which a micro-mirror deflection angle is controlled by a mechanical mechanism in the prior art.
  • a first aspect of the embodiments of the present invention provides an optical cross connector, including: an optical input device, a polarization separation device, a first polarization conversion device, a liquid crystal liquid crystal LCOS optical switching module, and a second polarization conversion.
  • Device polarization composite device, light output device;
  • the light input device includes Z input ports, and the light input device is configured to respectively input respective first light beams of the Z-channel first light beam into the polarization separating device, and the respective light beams of the first light beam are concentrated.
  • the light output device does not overlap;
  • the light output device includes W output ports, the light output device is configured to output a W-channel second beam set, and the propagation optical paths of the respective second light beams in the second beam set do not coincide;
  • the polarization separating device is configured to separately perform polarization separation on each of the first light beams in the first light beam to obtain a third beam set and a fourth beam set, wherein the third beam set is the third X channel
  • the light beam is a beam component of the first X-ray of the first beam concentrated in the first beam
  • the X-th beam of the fourth beam is the X-th channel of the first beam.
  • a beam component having a light beam in a second polarization state further configured to output respective third light beams of the third beam concentration to the LCOS light switching module, and to respectively focus the fourth light beam of the fourth light beam Output to the first polarization state conversion device, respectively;
  • the first polarization conversion device is configured to perform polarization state conversion on each fourth beam of the fourth beam set to obtain a fifth beam set, wherein each fifth beam in the fifth beam set is in a first polarization state; And a method for outputting, respectively, the respective fifth light beams of the fifth light beam set to the LCOS light switching module;
  • the LCOS optical switching module is configured to perform optical path offset on each of the third light beams according to a preset first optical path offset parameter set to obtain a sixth beam set, and concentrate the sixth beam
  • the sixth beam is output to the polarization combining device, wherein the Xth offset parameter in the first optical path offset parameter set is used to perform optical path offset on the Xth third beam, so that the Xth After the three beams are shifted, the propagation path of the Yth sixth beam in the sixth beam set is propagated;
  • the LCOS optical switching module is further configured to perform optical path offset on each of the fifth beams according to a preset second optical path offset parameter set, to obtain a seventh beam set, and to collect each of the seventh beam sets.
  • the seven beams are output to the second polarization conversion device, wherein the Xth offset parameter in the second optical path offset parameter set is used to perform optical path offset on the Xth fifth beam, so that the Xth After the five beams are shifted, the propagation path of the Yth seventh beam in the seventh beam set is propagated, wherein the Yth seventh beam is converted by the second polarization conversion device and then concentrated along the eighth beam Propagation optical path propagation of the Yth eighth beam;
  • the second polarization conversion device is configured to perform polarization state conversion on each of the seventh light beams in the seventh beam set to obtain the eighth beam set, and each of the eighth light beams in the eighth beam set is in the second polarization a mode in which a propagation optical path of the Yth seventh beam in the seventh beam set corresponds to a propagation optical path of the Yth eighth beam in the eighth beam set; and is further configured to concentrate the eighth beam Each of the eighth light beams is respectively output to the polarization combining device;
  • the polarization combining device is configured to perform polarization combining on each of the sixth beam set and the eighth beam set to obtain the second beam set, wherein the polarization combining device respectively pairs the sixth beam
  • the Yth sixth beam concentrated in the beam and the Yth eighth beam in the eighth beam are polarization complexed to obtain a Yth second beam, a propagation path of the Yth sixth beam, and the first
  • the propagation optical paths of the Y eighth beams are satisfied, and the beams obtained after the polarization combining are propagated along the propagation optical path of the Yth second beam of the second beam set; and are also used to concentrate the respective second beams
  • the second light beams are respectively output to the light output device;
  • the LCOS optical switching module includes: a first LCOS optical switching unit and a second LCOS optical switching unit; and the first LCOS optical switching unit includes a first LCOS optical switching subunit and a second LCOS optical switching subunit, the second LCOS optical switching subunit comprising a third LCOS optical switching subunit and a fourth LCOS optical switching subunit;
  • the first LCOS optical switching subunit is configured to deflect a direction angle of each of the third light beams according to a first deflection angle corresponding to an input port to which each of the third light beams belongs, so that Each of the third light beams that are deflected are respectively output to the third LCOS light switching subunit;
  • the second LCOS optical switching subunit is configured to deflect the direction angles of the fifth light beams according to a second deflection angle corresponding to each input port of the fifth light beam, so that each of the deflected The fifth light beams are respectively output to the fourth LCOS light switching subunit;
  • the third LCOS optical switching subunit is configured to deflect a direction angle of each of the deflected third light beams according to a third deflection angle corresponding to an input port to which each of the third light beams belongs Each of the deflected third light beams is output to the polarization combining device;
  • the fourth LCOS optical switching subunit is configured to deflect a direction angle of each of the deflected fifth light beams according to a fourth deflection angle corresponding to an input port to which each fifth light beam belongs, so as to be deflected
  • Each of the fifth light beams is respectively output to the second polarization conversion device;
  • the first deflection angle and the third deflection angle corresponding to the Xth input port are the Xth offset in the first optical path offset parameter set for any Xth input port.
  • the parameter determines that the second deflection angle and the fourth deflection angle corresponding to the Xth input port are determined according to an Xth offset parameter in the second optical path offset parameter set.
  • the polarization separation device includes Z polarization separation input location regions and Z first polarization separation output location regions And Z second polarization separation output position regions, wherein the Xth polarization separation input position region corresponds to the Xth first polarization separation output position region and the Xth second polarization separation output position region, the polarization separation device And receiving, by the Xth polarization separation input location region, an Xth first beam, and outputting through the Xth first polarization separation output position region and the Xth second polarization separation output location region respectively a Xth third beam and an Xth fourth beam;
  • the polarization combining device includes Z first polarization composite input position regions, Z second polarization composite input position regions, and Z polarization composite output position regions, wherein the Yth polarization composite output position region and the Yth first a polarization composite input location region corresponding to a Yth second polarization composite input location region, wherein the polarization combining device is configured to respectively input from the Yth first polarization composite input location region and the Yth second polarization composite input
  • the position area receives the Yth sixth beam and the Yth eighth beam, and outputs the composited portion through the Yth polarization composite output position area Y second beams;
  • the first polarization conversion device and the second polarization conversion device include Z conversion position regions; the first LCOS light switching subunit, the second LCOS light switching subunit, and the third LCOS optical switch
  • the unit and the fourth LCOS optical switching subunit respectively include Z offset position areas;
  • the Xth first beam outputted by the Xth output port of the optical input device corresponds to the Xth polarization separation input position area
  • the Xth first polarization separation output position region corresponds to an Xth deflection position region of the first LCOS light switching subunit; the Xth second polarization separation output position region and the first polarization conversion device X conversion position areas correspond;
  • the Xth fifth beam outputted by the Xth conversion position area of the first polarization conversion device corresponds to the Xth deflection position area of the second LCOS light switching subunit;
  • the deflected Xth third beam corresponds to the Yth deflected position region of the third LCOS light switching subunit
  • the Xth second deflection angle determined according to the Xth offset parameter of the second optical path offset parameter set is used to cause the output of the Xth offset position area of the second LCOS optical switching subunit
  • the deflected Xth fifth beam corresponds to the Yth deflected position region of the fourth LCOS light switching subunit
  • the Xth third deflection angle determined according to the Xth offset parameter of the first optical path offset parameter set is used to enable the output of the Yth offset position area of the third LCOS optical switching subunit Y sixth beams corresponding to the Y first first polarization composite input position regions;
  • the Xth fourth deflection angle determined according to the Xth offset parameter of the second optical path offset parameter set is used to enable the output of the Yth offset position area of the fourth LCOS optical switching subunit Y seventh light beams corresponding to the Yth conversion position area of the second polarization conversion device;
  • the Yth eighth beam outputted by the Yth conversion position area of the second polarization conversion device corresponds to the Yth second polarization composite input position area
  • a second light beam outputted from the Y-th polarization composite output position region corresponds to a Yth output port of the light output device
  • the input directions of the respective input ports of the optical input device are disposed in parallel along a first direction angle;
  • the output directions of the respective output ports on the output device are arranged in parallel along the second direction angle;
  • the first direction angle is the same as the second direction angle;
  • the arrangement of the Z first rays of the first beam is P row a beam array of Q columns, a Z-channel second beam of the second beam set is arranged as a P-row Q-column beam array, and a line spacing of the first beams in the first beam set, the first beam concentration a column pitch of each of the first light beams, a line pitch of each of the second light beams in the second light beam set, and a column pitch of each of the second light beams in the second light beam set; an optical path extending direction of the first light beam set and the The optical path of the second beam set extends in parallel;
  • the Z polarization separation input position regions of the polarization separation device are arranged in an array of P rows and Q columns, and the polarization separation input position regions of the i-th row and the j-th column are located on the extended optical path of the first beam of the i-th row and the j-th column.
  • the Z polarization composite output position regions of the polarization combining device are arranged in an array of P rows and Q columns, and the polarization composite output position regions of the mth row and the nth columns are located at the second beam outputted to the output ports of the mth row and the nth column. Extending the light path;
  • Each of the deflected position regions of the first LCOS light switching subunit and the respective deflected position regions of the second LCOS light switching subunit are located in a first plane, the first plane and the first direction angle
  • the horizontal angle and the vertical angle are respectively a first horizontal deflection angle and a first vertical deflection angle, and the first horizontal deflection angle and the first vertical deflection angle are according to the first direction angle and the second a direction angle and a relative position determination between the light input device and the light output device;
  • the deflecting action surfaces of the respective deflected position regions of the first LCOS light switching subunit and the respective deflecting position regions of the second LCOS light switching subunit are disposed facing the polarization separating device, the first LCOS light
  • the deflection position area of the i-th row and the j-th column of the switching sub-unit is located on the extended optical path of the output beam of the first polarization separation output position region corresponding to the polarization separation input position region of the i-th row and the j-th column, the second LCOS light
  • the deflection position area of the i-th row and the j-th column of the switching sub-unit is located on the extended optical path of the output beam of the second polarization separation output position region corresponding to the polarization separation input position region of the i-th row and the j-th column;
  • Each of the deflected position regions of the third LCOS light switching subunit and the respective deflected position regions of the fourth LCOS light switching subunit are located in a second plane;
  • the second plane is deflected a plane defined by respective intersections of the respective extended optical paths of the third light beam concentrated in the third light beam and the respective extended optical paths of the second light beam concentrated in the second light beam, wherein the third Y-way is deflected
  • the extended optical path of the light beam intersects with the extended optical path of the second light beam of the Yth path;
  • a deflection surface of each of the deflecting position regions of the third LCOS light switching subunit and each of the deflecting position regions of the fourth LCOS light switching subunit is disposed facing the polarization combining device;
  • a deflection position region of the mth row and the nth column of the third LCOS light switching subunit is located in an extended optical path of the third beam of the ith row and the jth column after the deflection, and the mth row and the nth column At an intersection of the extended optical paths of the second light beam, the offset position of the mth row and the nth column of the fourth LCOS light switching subunit is located at the extended optical path of the fifth beam of the ith row and the jth column after the deflection And an intersection of the extended optical path of the second light beam of the mth row and the nth column;
  • intersection of the first plane and each of the third beams and an intersection of the first plane and each of the fifth beams do not coincide; and an intersection of the second plane and each of the deflected third beams The intersection of the second plane and each of the deflected fifth beams does not coincide;
  • the second plane is parallel to the first plane.
  • the first beam input from the polarization separation input position region, the third beam outputted from the first polarization separation output position region, and the fourth beam output from the second polarization separation output position region satisfy:
  • the third light beam and the fourth light beam are coplanar and intersect with the first light beam, and an angle between the third light beam and the first light beam and an angle between the fourth light beam and the first light beam are equal to a preset Polarization separation angle; and, the planes of the third beam and the fourth beam corresponding to the polarization separation input position region of the same row coincide, and the planes of the third beam and the fourth beam corresponding to the polarization separation input position regions of different rows are located Parallel to each other;
  • the eighth beam input from the position area and the second beam outputted from the polarization separation output position region satisfy: the sixth beam, the eighth beam and the second beam are coplanar And intersecting, the angle between the angle between the sixth beam and the second beam and the angle between the eighth beam and the second beam are both equal to the preset polarization separation angle; and the polarization composite output in the same row
  • the planes corresponding to the sixth beam and the eighth beam of the position area coincide, and the planes of the sixth beam and the eighth beam corresponding to the polarization composite output position areas of different rows are parallel to each other;
  • the first deflection angle corresponding to the Xth input port is specifically according to the relative position of the first LCOS optical switching subunit and the third LCOS optical switching subunit, The Xth offset parameter in the first optical path offset parameter set and the preset polarization separation angle are determined; the second deflection angle corresponding to the Xth input port is specifically according to the second LCOS optical switching subunit a relative position of the fourth LCOS light switching subunit, an Xth offset parameter of the second optical path offset parameter set, and the preset polarization separation angle determination;
  • the first deflection angle corresponding to the Xth input port is equal to the second deflection angle corresponding to the Xth input port; the third deflection angle corresponding to the Xth input port is equal to the Xth Enter the fourth deflection angle corresponding to the port.
  • the first beam input from the polarization separation input position region, the third beam outputted from the first polarization separation output position region, and the fourth beam output from the second polarization separation output position region satisfy: a third beam, the fourth beam being coplanar with the first beam, and the third beam being parallel to the fourth beam;
  • a sixth beam a second polarization composite input input to the first polarization composite input location region for any one of the corresponding first polarization composite input location region, the second polarization composite input location region, and the polarization composite output location region
  • the eighth beam input by the positional area is satisfied with the second light beam outputted by the polarization separation output position area, and the sixth light beam, the eighth light beam and the second light beam are coplanar and parallel to each other;
  • the Z first polarization separation output position regions of the polarization separation device are arranged in an array of P rows and Q columns; and the Z second polarization separation output position regions of the polarization separation device are arranged in an array of P rows and Q columns;
  • the Z first polarization complex input position regions of the polarization combining device are arranged in an array of P rows and Q columns; and the Z second polarization composite input location regions of the polarization combining device are arranged in P rows The array of beams in the Q column.
  • the first beam input from the polarization separation input position region, the third beam outputted from the first polarization separation output position region, and the fourth beam output from the second polarization separation output position region satisfy: a third beam, the fourth beam being coplanar with the first beam, and the third beam being parallel to the fourth beam;
  • the sixth beam input and the two polarization composite input position input by the first polarization composite input position region is equal to the second beam outputted from the polarization composite output position region, and the sixth beam, the eighth beam and the second beam are coplanar and parallel to each other;
  • the Z first polarization separation output position regions and the Z second polarization separation output position regions of the polarization separation device are arranged in an array of 2P rows and Q columns, and the Z first polarization separation output position regions are respectively located at preset a row in the first row number group, wherein the Z second polarization separation position regions are respectively rows in a preset second row number group, the rows in the first row number group and the second row number The rows in the group are different; wherein the third beam and the fourth beam from the same input port are located adjacent to each other in the same column;
  • the direction of the first LCOS light switching subunit biasing the third light beam to the first deflection angle and the third LCOS light switching subunit pair passing through Deflecting the third beam to deflect the third deflection angle in opposite directions; for any one of the fourth beams, the second LCOS light switching subunit deflecting the fifth beam
  • the direction of the second deflection angle is opposite to the direction in which the fourth LCOS light switching subunit deflects the deflected fifth beam by the fourth deflection angle.
  • the method further includes: an optical path converter, the optical path converter is one or more lenses, and the optical path is transformed The optical path converter is located parallel to the optical path of each of the deflected respective third light beams and the respective fifth light beams output by the first LCOS light switching unit to the second LCOS light switching unit a first plane setting; an equivalent optical center of the optical path converter is located at a center of the first LCOS optical switching unit and a center of the second LCOS optical switching unit And a distance between the equivalent optical center of the optical path converter and a center of the first LCOS optical switching unit is equal to a distance between the optical path converter and a center of the second LCOS optical switching unit
  • the center of the first LCOS optical switching unit is composed of an array of deflected position regions of the first LCOS optical switching subunit and an array of deflected position regions of the second LCOS optical switching subunit At the center of the array of offset position
  • the method further includes: a first optical path converter and a second optical path converter, the first optical path converter and The second optical path converter is one or more lenses, and the first optical path converter is located in each of the deflected portions of the first LCOS optical switching subunit outputted to the third LCOS optical switching subunit a propagation path of the third light beam, wherein the second optical path converter is located at the deflected light of each of the fifth light beams output by the second LCOS light switching subunit to the fourth LCOS light switching subunit On the way, the first optical path converter and the second optical path converter are coplanar and parallel to the first plane;
  • the equivalent optical center of the first optical path converter is located at a center of the array of offset position regions of the first LCOS optical switching subunit and a center of the array of offset position regions of the third LCOS optical switching subunit a line, and a distance between an equivalent optical center of the first optical path converter and a center of the array of offset position regions of the first LCOS optical switching subunit is equal to an equivalent light of the first optical path converter a distance between a center and a center of the array of deflection position regions of the third LCOS light switching subunit; an equivalent optical center of the second optical path converter is located at a deflection position of the second LCOS optical switching subunit a line connecting the center of the array of regions to the center of the array of deflected position regions of the fourth LCOS light switching subunit, and a deflection position region of the second optical path converter and the second LCOS optical switching subunit
  • the distance between the centers of the arrays is equal to the distance between the equivalent optical center of the second optical path converter and the
  • the optical path between the equivalent optical center of the optical path converter and the center of the polarization separation device Equal to twice the equivalent focal length of the optical path converter, the center of the polarization separation device is the center of the array of position regions composed of each of the polarization separation input position regions;
  • An optical path between an equivalent optical center of the optical path converter and a center of the polarization combining device is equal to twice an equivalent focal length of the optical path converter, and a center of the polarization combining device is each of the polarization complexes
  • the output location area consists of the center of the array of location areas.
  • the method further includes:
  • an Xth offset parameter in the first optical path offset parameter set is used to offset the Xth third light beam by the LCOS optical switching module
  • the propagation path of the Xth sixth beam of the six beams is concentrated, and the Xth offset parameter of the second path offset parameter set is used to offset the Xth fifth beam by the LCOS optical switching module Propagating the propagation path of the Xth seventh beam in the seventh beam concentration;
  • a beam outputted by the Xth deflecting position region of the first LCOS optical switching subunit corresponds to an Xth deflecting position region of the third LCOS optical switching subunit; and a second LCOS optical switching subunit
  • the light beams outputted by the X deflection position regions correspond to the Xth deflection position regions of the fourth LCOS light switching subunit.
  • the first polarization conversion device is located in the second LCOS light
  • the switching subunit is adjacent to a side of the polarization separation device; the second polarization conversion device is located at a side of the fourth LCOS optical switching subunit adjacent to the polarization combining device.
  • the first polarization conversion device and the The second polarization conversion device is a half wave plate.
  • the optical input device and the polarization separation Also included between the devices: an array of collimating mirrors;
  • the polarization combining device and the light output device further include: an array of collimating mirrors.
  • each of the light beams in the beam array input by the optical input device is separated into a beam component in a first polarization state and a beam component in a second polarization state by a polarization separation device, and a polarization conversion device converts each of the beam components in the second polarization state into a first polarization state, and respectively adopts an offset parameter of the first optical path offset parameter set according to each input port and a second through the LCOS optical switching module
  • the offset parameter in the optical path offset parameter set optically shifts the beam component in the first polarization state corresponding to each input port and the beam component in the first polarization state after the conversion, and then passes through the second polarization conversion device and the polarization combining device.
  • the respective beams are respectively restored, and the combined beams are output to the light output device.
  • the optical cross connector provided by the embodiment of the invention has no mechanical components, no friction loss, and the optical cross connector has high stability.
  • FIG. 1 is a schematic structural view of a MEMS-based 3D OXC optical switch
  • Embodiment 1 of the optical cross connector of the present invention is a schematic structural view of Embodiment 1 of the optical cross connector of the present invention.
  • FIG. 3 is a schematic structural view of an alternative embodiment of the optical cross connector of FIG. 2;
  • FIG. 4 is a schematic structural view of a preferred embodiment of the first embodiment of the optical cross connector shown in FIG. 2;
  • FIG. 5 is a schematic view showing the XOZ plane structure of the second embodiment of the optical cross connector of the present invention.
  • FIG. 6 is a schematic diagram of an XOZ plane optical path of Embodiment 2 of the optical cross connector shown in FIG. 5;
  • FIG. 7 is a schematic diagram of an optical path of a polarization separation device in Embodiment 2 of the optical cross connector shown in FIG. 5;
  • FIG. 8 is a schematic diagram of an optical path of a first LCOS optical switching subunit and a second LCOS optical switching subunit in the second embodiment of the optical cross connector shown in FIG. 5;
  • FIG. 9 is a schematic diagram showing a distribution of a partial position array of a first LCOS optical switching subunit and a second LCOS optical switching subunit in the second embodiment of the optical cross connector shown in FIG. 5;
  • FIG. 10 is a schematic diagram of an optical path of a preferred embodiment of the second embodiment of the optical cross-connector shown in FIG. 5;
  • FIG. 11 is a schematic structural view of another alternative embodiment of the second embodiment of the optical cross connector shown in FIG. 5;
  • Embodiment 3 of the optical cross connector of the present invention is a schematic structural view of Embodiment 3 of the optical cross connector of the present invention.
  • FIG. 13 is a schematic diagram of an optical path of a polarization separation device in Embodiment 3 of the optical cross connector shown in FIG. 12;
  • FIG. 14 is a schematic diagram showing distributions of respective third light beams and respective fourth light beams outputted by the polarization separation device in Embodiment 3 of the optical cross connector shown in FIG. 12;
  • Embodiment 4 is a schematic structural view of Embodiment 4 of the optical cross connector of the present invention.
  • FIG. 16 is a schematic diagram showing distributions of respective third light beams and respective fourth light beams outputted by the polarization separation device in Embodiment 4 of the optical cross connector shown in FIG. 15;
  • FIG. 17 is a schematic diagram showing a distribution of a partial position array of a first LCOS optical switching subunit and a second LCOS optical switching subunit in the fourth embodiment of the optical cross connector shown in FIG. 15;
  • FIG. 18 is a schematic structural view of an alternative embodiment of the fourth embodiment of the optical cross connector shown in FIG. 15;
  • FIG. 19 is a schematic diagram showing distributions of respective third light beams and respective fourth light beams outputted by a polarization separating device of the optical cross connector shown in FIG. 18;
  • FIG. 20 is a schematic diagram showing the distribution of the array of deflection position regions of the first LCOS optical switching subunit and the second LCOS optical switching subunit in the optical cross connector shown in FIG. 15.
  • optical path converter 90, optical path converter; 91, first optical path converter;
  • FIG. 2 is a schematic structural view of Embodiment 1 of the optical cross-connector of the present invention
  • FIG. 3 is a schematic structural view of an alternative embodiment of the optical cross-connector of FIG. 2
  • the optical cross connector of the embodiment of the present invention may include:
  • the LCOS optical switching module 4 may include a silicon-based complementary metal oxide semiconductor (CMOS) circuit substrate and a liquid crystal layer.
  • CMOS complementary metal oxide semiconductor
  • the basic principle is to implement an optical cross connector based on LCOS material.
  • an optical signal generally includes two polarization states, and information transmitted in two polarization states of the optical signal is dynamically exchanged, since the silicon-based CMOS circuit substrate and the liquid crystal layer can only Deflecting the light beam whose polarization state is parallel to the first polarization state of the liquid crystal layer, therefore, it is necessary to convert the signal in the second polarization state of the optical signal into the first polarization state, and then use the silicon-based CMOS circuit substrate and the liquid crystal layer.
  • the first polarization conversion device 3 and the second polarization conversion device 5 for converting the polarization state may employ, for example, a half wave plate.
  • the optical input device 1 may include Z input ports, and the optical input device 1 is configured to input the respective first light beams of the Z-channel first light beam into the polarization separation device 2, respectively.
  • the propagation paths of the individual beams in the first beam are not coincident;
  • the output device 7 includes W output ports, and the light output device 7 is configured to output a W-channel second beam set, and the propagation optical paths of the respective second beams in the second beam set do not coincide.
  • the polarization separation device 2 can be configured to separately perform polarization separation on each of the first beams concentrated in the first beam to obtain a third beam set and a fourth beam set, wherein the third X beam of the third beam is first
  • the X-th beam of the first beam is concentrated in the first polarization state
  • the X-th beam in the fourth beam is the X-ray of the first beam in the first beam. It is also applicable to output the respective third beams of the third beam set to the LCOS light switching module 4, respectively, and output the respective fourth beams of the fourth beam group to the first polarization conversion device 3, respectively.
  • the first polarization conversion device 3 can be configured to perform polarization state conversion on each fourth beam of the fourth beam set to obtain a fifth beam set, and each fifth beam in the fifth beam set is in a first polarization state; And outputting the fifth light beams of the fifth light beam to the LCOS light switching module 4 respectively.
  • the LCOS optical switching module 4 can be configured to perform optical path offset on each of the third light beams according to the preset first optical path offset parameter set to obtain a sixth beam set, and output each sixth beam in the sixth beam set to the polarization.
  • the LCOS optical switching module 4 is further configured to perform optical path offset on each of the fifth beams according to the preset second optical path offset parameter set to obtain a seventh beam set, and output each seventh beam in the seventh beam set to a second polarization conversion device 5, wherein the Xth offset parameter in the second optical path offset parameter set is used to perform optical path offset on the Xth fifth beam, so that the Xth fifth beam is offset from the trailing edge
  • the propagation path of the Yth seventh beam concentrated in the seven beams is propagated, wherein the Yth seventh beam is converted by the second polarization conversion device 5 and propagates along the propagation path of the Yth eighth beam in the eighth beam concentration.
  • the second polarization conversion device 5 is configured to perform polarization state conversion on each of the seventh light beams in the seventh light beam to obtain the eighth light beam set, and each of the eighth light beams in the eighth light beam set is in the second polarization state, wherein
  • the propagation optical path of the Yth seventh beam in the seventh beam set corresponds to the propagation optical path of the Yth eighth beam in the eighth beam set; and may also be used to output the respective eighth beams in the eighth beam set to the polarization respectively Composite device 6.
  • first optical path offset parameter set and the second optical path offset parameter set may be preset on the LCOS optical switching module 4, or may be disposed at other positions of the optical cross-connector, and the first optical path offset parameter.
  • the respective offset parameters of the set are used to indicate the correspondence between the respective beams of the third beam set and the respective beams of the sixth beam set when the LCOS light switching module 4 performs the optical path shift, and the respective offset parameters of the second optical path offset parameter set. It is used to indicate the correspondence between the respective beams of the fifth beam set and the respective beams of the seventh beam set when the LCOS light switching module 4 performs the optical path shift.
  • the sixth beam is The propagation path of the Xth sixth beam is concentrated, and the Xth offset parameter of the second path offset parameter is used to offset the Xth fifth beam by the LCOS light switching module 4
  • the propagation path of the X seventh beams propagates.
  • the optical cross-connector provided by the embodiment of the present invention separates each light beam in the beam array input by the optical input device into a beam component in a first polarization state and a beam component in a second polarization state by providing a polarization separating device, and Converting each of the beam components in the second polarization state to the first polarization state by the first polarization conversion device, and inputting each of the beam components in the first polarization state and the respective beam components in the first polarization state after conversion into the LCOS
  • the optical switching module, the LCOS optical switching module respectively performs the first polarization state corresponding to each input port according to the offset parameter of the first optical path offset parameter set and the offset parameter of the second optical path offset parameter set corresponding to each input port.
  • the beam component and the converted beam component in the first polarization state are optically shifted, and each of the first optical path offset parameter set and the second optical path offset parameter set is used to indicate each of the input LCOS optical switching modules 4
  • the optical path correspondence between the beam in the first polarization state and the output beam and the respective inputs to the LCOS light switching module 4 The light path of the light beam in the first polarization state is switched to the light path of the output light beam, and the LCOS light switching module outputs the light beam components in the first polarization state which are respectively shifted by the optical path to the polarization combining device, and each of the light path is offset.
  • the beam components in the first polarization state after the shifting are respectively output to the second polarization conversion device, and the second polarization conversion device converts the converted beam components in the first polarization state back to the second polarization state and outputs the polarization components to the polarization composite respectively.
  • the device, the polarization combining device respectively pairs the beam components in the first polarization state from the same input port and
  • the beam components reduced to the second polarization state are polarization-combined, and the combined beams are output to the light output device output.
  • Embodiments of the present invention provide an optical cross-connector realized by a principle of controlling a refractive index of a liquid crystal layer using a silicon-based CMOS circuit.
  • Optical cross-connects implemented based on this principle have several advantages.
  • the silicon-based CMOS circuit controls the refractive index of the liquid crystal layer as a light-driven engine. Therefore, the optical cross-connector fabricated using the silicon-based CMOS circuit and the liquid crystal layer has no mechanical components, no friction loss, and stability of the optical cross-connector. Higher.
  • the silicon-based CMOS circuit controls the liquid crystal layer to have the advantages of low cost and easy promotion, and does not need to set a large-volume optical inspection module for feedback control of optical power monitoring.
  • the optical input device 1 and the polarization separation device 2 may further include: a collimating mirror array 8 to improve the optical input device 1
  • the degree of collimation of the respective beam directions input by the polarization separating device 2 can improve the accuracy of optical path shifting of the respective beams when the optical cross-connector performs the optical path crossing.
  • the polarization combining device 6 and the light output device 7 may further include a collimating mirror array 8 to improve the accuracy of the direction of the respective light beams input by the polarization combining device 6 to the light output device 7.
  • the collimator array 8 may employ a collimator that can input a Z-way beam.
  • the LCOS optical switching module 4 of the embodiment of the present invention may include: a first LCOS optical switching unit 45 and a second LCOS optical switching, based on the optical cross-connector shown in FIG. The unit 26; the first LCOS optical switching unit 45 may include a first LCOS optical switching subunit 41 and a second LCOS optical switching subunit 42, and the second LCOS optical switching unit 46 may include a third LCOS optical switching subunit 43 and a fourth LCOS optical switching subunit 44.
  • the first LCOS optical switching sub-unit 41 can be configured to deflect the direction angles of the respective third light beams according to the first deflection angle corresponding to the input port to which the respective third light beams belong, so that each of the third portions that are deflected The light beams are respectively output to the third LCOS light switching sub-unit 43.
  • the second LCOS light switching sub-unit 42 can be configured to deflect the direction angles of the respective fifth light beams according to the second deflection angle corresponding to the input ports of the respective fifth light beams, so that the respective fifth light beams that are deflected are respectively Output to the fourth LCOS light switching subunit 44.
  • the third LCOS light switching subunit 43 can be used to respectively input according to each third beam
  • the third deflection angle corresponding to the inlet port is deflected toward the direction angle of each of the deflected third beams, so that the deflected third beams are respectively output to the polarization combining device 6.
  • the fourth LCOS light switching sub-unit 44 can be configured to deflect the direction angles of the fifth light beams according to the fourth deflection angle corresponding to the input ports of the respective fifth light beams, so that the respective fifth light beams that are deflected are respectively It is output to the second polarization conversion device 5.
  • the first LCOS optical switching subunit 41, the second LCOS optical switching subunit 42, the third LCOS optical switching subunit 43, and the fourth LCOS optical switching subunit 44 may respectively include a silicon-based CMOS circuit and a liquid crystal layer.
  • a silicon-based CMOS circuit on each of the light switching subunits controls the refractive index of the liquid crystal layer on the light switching subunit such that the light beam outputting the light switching subunit and the direction angle of the light beam input to the light switching subunit The deflection angle corresponding to the input beam is deflected.
  • the first deflection angle and the third deflection angle corresponding to the Xth input port are determined according to an Xth offset parameter in the first optical path offset parameter set
  • the second deflection angle and the fourth deflection angle corresponding to the Xth input port are determined according to the Xth offset parameter in the second optical path offset parameter set.
  • the number of output ports W can be set equal to the number Z of input ports, or can be set not equal to Z.
  • W can be set equal to Z. It should be noted that the drawings of the embodiments of the present invention are all equal to the Z example.
  • the polarization separation device 2 may include Z polarization separation input position regions, Z first polarization separation output position regions, and Z second polarization separation output position regions, wherein the Xth polarization separation input position region and the The X first polarization separation output position regions correspond to the Xth second polarization separation output position regions, and the polarization separation device 2 is configured to receive the Xth first light beam from the Xth polarization separation input position region, and pass the Xth The first polarization separation output position region and the Xth second polarization separation output position region respectively output the Xth third beam and the Xth fourth beam.
  • the polarization combining device 6 may include Z first polarization composite input position regions, Z second polarization composite input position regions, and Z polarization composite output position regions, wherein the Yth polarization composite output position region and the Yth first The polarization composite input position region corresponds to the Yth second polarization composite input position region, and the polarization combining device 6 is configured to receive the Yth from the Yth first polarization composite input position region and the Yth second polarization composite input position region, respectively. And a Yth eighth beam and a Yth eighth beam, and outputting the combined Yth second beam through the Yth polarization composite output position region.
  • the first polarization conversion device 3 and the second polarization conversion device 5 may include Z conversion position regions; a first LCOS light switching subunit 41, a second LCOS light switching subunit 42, a third LCOS light switching subunit 43 and a fourth The LCOS light switching sub-units 44 respectively include Z deflection position areas.
  • the optical input device 1 can be configured to output each of the first input beam arrays of the P ⁇ Q channels to the polarization separation device 2, wherein the Xth first beam output by the Xth output port of the optical input device 1 Corresponding to the Xth polarization separation input position area.
  • the polarization separation device 2 can be used to output each of the third light beams to the first LCOS light switching subunit 41, respectively.
  • the Xth first polarization separation output position area corresponds to the Xth deflection position area of the first LCOS light switching subunit 41; the polarization separation device 2 is further specifically configured to output each of the fourth light beams to the respective The first polarization conversion device 3, wherein the Xth second polarization separation output position region corresponds to the Xth conversion position region of the first polarization conversion device 3.
  • the first polarization conversion device 3 can be configured to output each of the second beam components to the second LCOS light switching subunit 42 respectively, wherein the Xth of the Xth conversion position area of the first polarization conversion device 3 outputs The fifth light beam corresponds to the Xth deflected position area of the second LCOS light switching subunit 42.
  • the first LCOS light switching sub-unit 41 can be configured to deflect the direction angles of the respective third light beams according to the first deflection angles corresponding to the input ports of the respective third light beams, so that the respective third light beams that are deflected are respectively Output to the third LCOS optical switching subunit 43, wherein the Xth first deflection angle determined according to the Xth offset parameter of the first optical path offset parameter set is used to make the first LCOS optical switching subunit
  • the deflected Xth third beam outputted from the Xth deflecting position region of 41 corresponds to the Yth deflecting position region of the third LCOS light switching subunit 43.
  • the second LCOS light switching sub-unit 42 can be configured to deflect the direction angles of the respective fifth light beams according to the second deflection angle corresponding to the input ports of the respective fifth light beams, so that the respective fifth light beams that are deflected are respectively Output to the fourth LCOS optical switching subunit 44, wherein the Xth second deflection angle determined according to the Xth offset parameter of the second optical path offset parameter set is used to make the second LCOS optical switching subunit
  • the deflected Xth fifth beam outputted by the Xth offset position area of 42 corresponds to the Yth deflected position area of the fourth LCOS light switching subunit 44.
  • the third LCOS light switching sub-unit 43 can be configured to respectively deflect the direction angles of the deflected third light beams according to the third deflection angle corresponding to the input port to which the third light beam belongs, to obtain each of the sixth light beam groups. a sixth beam such that each of the sixth beams is output to a polarization complex
  • the Yth sixth beam outputted by the location area corresponds to the Yth first polarization composite input location area.
  • the fourth LCOS light switching sub-unit 44 can be configured to respectively deflect the direction angles of the fifth light beams according to the fourth deflection angle corresponding to the input ports of the respective fifth light beams to obtain the seventh light beams of the seventh light beam concentration.
  • the respective seventh light beams are respectively output to the second polarization conversion device 5, wherein the Xth fourth deflection angle determined according to the Xth offset parameter of the second optical path offset parameter set is used to cause the
  • the Yth seventh beam outputted from the Yth deflection position area of the fourth LCOS light switching subunit 44 corresponds to the Yth conversion position area of the second polarization conversion device 5.
  • the second polarization conversion device 5 can be configured to output each of the eighth light beams to the polarization combining device 6, wherein the Yth eighth beam and the Yth output from the Yth conversion position region of the second polarization conversion device 5 The second polarization composite input location area corresponds.
  • the polarization combining device 6 can be configured to respectively combine the sixth beam and the eighth beam received by each of the first polarization composite input position regions and the respective second polarization composite input position regions to obtain a Z channel second beam set and pass The Z polarization composite output position regions respectively output respective second light beams of the second light beam concentration to the light output device 7; wherein, the Y beam outputted by the Yth polarization composite output position region and the Yth of the light output device 7 The output ports correspond.
  • the first deflection angle corresponding to the Xth input port may be based on the relative position of the first LCOS optical switching subunit 41 and the third LCOS optical switching subunit 43.
  • the Xth offset parameter in the first optical path offset parameter set determines that the second offset angle corresponding to the Xth input port is switchable according to the second LCOS optical switching subunit 42 and the fourth LCOS optical
  • the relative position of the subunit 44 and the Xth offset parameter of the second optical path offset parameter set are determined.
  • the first deflection angle needs to be satisfied, based on the relative position between the first LCOS light switching subunit 41 and the third LCOS light switching subunit 43, and the Xth third after the first deflection angle is deflected.
  • the light beam is input to the Yth deflecting position region of the corresponding third LCOS light switching subunit 43; similarly, the second deflecting angle is satisfied, based on the second LCOS optical switching subunit 42 and the fourth LCOS optical switching subunit
  • the relative position between the 44, the Xth fifth optical path deflected according to the second deflection angle is input to the Yth deflected position area of the corresponding fourth LCOS optical switching subunit 44.
  • the third deflection angle corresponding to the Xth input port may be determined according to an Xth offset parameter in the first optical path offset parameter set
  • the fourth deflection corresponding to the Xth input port The angle may be determined according to the Xth offset parameter in the second optical path offset parameter set, and the third offset angle and the fourth deflection angle are required to satisfy the deflected third beam and the deflected first
  • the five beams satisfy the input conditions of the polarization combining means 6 for the optical path requiring polarization combining.
  • the correspondence between the input conditions of the optical paths required for the different types of polarization combining devices 6 and the respective deflection angles will be described using a specific example.
  • any Xth input port if the Xth offset parameter in the first optical path offset parameter set is used to offset the Xth third beam by the LCOS optical switching module 4, The propagation path of the Xth sixth beam of the six beams is concentrated, and the Xth offset parameter of the second path offset parameter set is used to offset the Xth fifth beam by the LCOS light switching module 4 The propagation path of the Xth seventh beam is concentrated, and the beam outputted by the Xth deflection position of the first LCOS light switching subunit 41 corresponds to the Xth deflection position of the third LCOS light switching subunit 43. The light beam outputted from the Xth deflecting position area of the second LCOS light switching subunit 42 corresponds to the Xth deflecting position area of the fourth LCOS light switching subunit 44.
  • the first polarization conversion device 3 may be located at a side of the second LCOS light switching subunit 42 near the polarization separation device 2; the second polarization conversion device 5 may be located at the fourth LCOS light switching subunit 44 near the polarization composite device 6 One side. Further, the first polarization conversion device 3 may be located on the optical path between the polarization separation device 2 and the second LCOS light switching subunit 42; the second polarization conversion device 5 may be located at the fourth LCOS optical switching subunit 44 and the polarization composite device 6 on the light path.
  • the first polarization conversion device 3 can be attached to a side surface of the second LCOS light switching subunit 42 near the polarization separation device 2, and the second polarization conversion device 5 can be attached to the fourth LCOS light switching subunit 44. Adjacent to one side surface of the polarization combining device 6, to enhance the overall compactness of the optical cross-connector structure.
  • the LCOS optical switching module 4 may also include three or more LCOS optical switching units to achieve angular deflection in steps.
  • the first deflection angle and the second deflection angle of the respective input ports can be achieved by the first two LCOS light switching units close to the optical input device 1.
  • the LCOS light switching unit near the light output device 7 realizes the optical path deflection of the third deflection angle and the fourth deflection angle corresponding to the respective input ports.
  • the number of output ports W may be set not equal to the number Z of input ports.
  • the number of polarization separation input position regions of the polarization separation device 2, the number of conversion position regions of the first polarization conversion device 3, and the number of the conversion position regions may be set.
  • the number of the deflection position areas of the first LCOS light switching subunit 41, the number of the deflection position areas of the second LCOS light switching subunit 42 are the same as the number of input ports, and the polarization composite output position area of the polarization combining device 6 is set.
  • the number, the number of switching position areas of the second polarization conversion device 5, the number of deflection position areas of the third LCOS light switching subunit 43, the number of deflection position areas of the fourth LCOS light switching subunit 44, and the output port The number is the same. Further, if the W setting is greater than Z, then some of the output ports may be in an idle state, that is, there is no beam to be output. If the W setting is less than Z, and the light beam of some input ports needs to be discarded, the optical path offset parameters of the first optical path offset parameter set and the second optical path offset parameter set corresponding to the input port that can be discarded may be used for determining.
  • the first deflection angle and the second deflection angle corresponding to the discarded input port deflect the propagation beams of the third beam and the fifth beam corresponding to the input port to the third LCOS optical switching subunit 43 and the fourth optical switching The area of the sub-unit 44 outside the W offset position area.
  • the optical cross-connector provided by the embodiment of the invention is deflected by the dual LCOS optical switching unit, so that the optical cross-connector has a symmetrical optical path and is easy to perform a composite operation of optical signals of different polarization states.
  • FIG. 5 is a schematic view showing the XOZ plane structure of the second embodiment of the optical cross-connector of the present invention
  • FIG. 6 is a schematic diagram of the XOZ plane optical path of the second embodiment of the optical cross-connector of FIG. 5
  • FIG. 8 is a schematic diagram of an optical path of a first LCOS optical switching subunit and a second LCOS optical switching subunit in the second embodiment of the optical cross connector shown in FIG. 5
  • FIG. FIG. 5 is a schematic diagram showing the distribution of the array of deflected position regions of the first LCOS optical switching subunit and the second LCOS optical switching subunit in the second embodiment of the optical cross connector shown in FIG. 5.
  • the following settings can be adopted in the optical cross connector provided by the embodiment of the present invention:
  • the input directions of the respective input ports of the optical input device 1 are arranged in parallel along the first direction angle; the output directions of the respective output ports on the light output device 7 are parallel along the second direction.
  • the arrangement of the first beam of the first beam set Z is a row array of P rows and Q columns, and the arrangement of the Z beams of the second beam is arranged by a row array of P rows and Q columns; the optical path of the first beam set extends The direction is parallel to the direction in which the optical path of the second beam set extends.
  • the Z polarization separation input position regions of the polarization separation device 2 may be arranged in an array of P rows and Q columns, and the polarization separation input position regions of the i-th row and the j-th column may be located on the extended optical path of the first beam of the i-th row and the j-th column.
  • the Z polarization composite output position regions of the polarization combining device 6 may be arranged in an array of P rows and Q columns, and the polarization composite output position region of the mth row and the nth column may be located at the output port of the mth row and the nth column.
  • the two beams extend on the optical path.
  • the respective deflected position regions of the first LCOS light switching subunit 41 and the respective deflected position regions of the second LCOS light switching subunit 42 are located in the first plane.
  • the horizontal angle and the vertical angle between the first plane and the first direction angle are respectively a first horizontal deflection angle and a first vertical deflection angle, and the first horizontal deflection angle and the first vertical deflection angle are according to the first direction angle and the first
  • the two-direction angle and the relative position between the light input device 1 and the light output device 7 are determined.
  • the deflection regions of the respective deflection position regions of the first LCOS light switching sub-unit 41 and the respective deflection position regions of the second LCOS light switching sub-unit 42 are disposed facing the polarization separation device 2, and the first LCOS light switching sub-unit 41
  • the deflection position area of the i-th row and the j-th column is located on the extended optical path of the output beam of the first polarization separation output position region corresponding to the polarization separation input position region of the i-th row and the j-th column
  • the offset position area of the i-th row and the j-th column is located on the extended optical path of the output beam of the second polarization separation output position region corresponding to the polarization separation input position region of the i-th row and the j-th column.
  • the deflecting action faces of the third LCOS light switching subunit 43 and the fourth LCOS light switching subunit 44 are disposed facing the polarization combining device 6.
  • the offset position region of the mth row and the nth column of the third LCOS light switching subunit 43 is located at the extended optical path of the third beam and the second beam of the mth row and the nth column of the i-th row and the jth column after the deflection
  • the offset position of the mth row and the nth column of the fourth LCOS light switching subunit 44 is located at the extended optical path and the mth row of the fifth beam of the i-th row and the jth column after the deflection The intersection of the extended light paths of the second beam of the nth column.
  • intersection of the first plane and each of the third beams and the intersection of the first plane and each of the fifth beams do not coincide; the intersection of the second plane with each of the deflected third beams and the second plane and each of the deflections The intersection of the five beams does not coincide.
  • each of the deflecting position regions of each LCOS light switching subunit may further include a reflecting surface located on a side of the liquid crystal region away from the incident light beam, so that the incident light beam passes through the liquid crystal region to change the deflection angle, and then is reflected by the reflecting surface to be emitted. The beam exits from the same side as the incident beam impinges on the liquid crystal region.
  • the first direction angle and the second direction angle may be the same.
  • the direction and the light output device 7 of each input port of the optical input device 1 in the three-dimensional coordinate system are shown.
  • the extending optical paths of the corresponding beams of the respective input ports may be in the same direction, wherein the projections of the extended optical paths corresponding to the input ports and the output ports corresponding to the same row and column in the Y0Z plane may coincide or may be parallel to each other.
  • FIG. 11 for another embodiment of the optical cross connector of FIG.
  • a schematic structural diagram of the selected embodiment wherein the direction indicated by the first direction angle is the same as the positive direction of the Z-axis, and the horizontal angle between the first plane and the first direction angle is an angle between the first plane and the XOZ plane. That is, the first horizontal deflection angle may be 90 degrees. Meanwhile, the angle between the first plane where the first LCOS light switching unit 45 is located and the YOZ plane may be inclined to the negative direction of the Z axis.
  • the first plane and the second plane may be inclined along the two axes, and the first horizontal deflection angle may be Not 90 degrees, that is, the angle between the first plane and the XOY plane and the YOZ plane may be set according to the relative position between the light input device 1 and the light output device 7, that is, the first plane where the first LCOS light switching unit 45 is located.
  • the angle with the YOZ plane may be inclined to the negative direction of the Z axis, and the angle between the first plane where the first LCOS light switching unit 45 is located and the XOZ plane may be inclined to the negative direction of the Y axis.
  • the first direction angle and the second direction angle may also be different. Accordingly, the setting of the first horizontal deflection angle and the first vertical deflection angle and the angle between the second plane and the XOY plane and the YOZ plane may be adjusted.
  • the line spacing of each of the first beams in the first beam, the column spacing of the first beams in the first beam set, the line spacing of the second beams in the second beam set, and the second beam may be equal, respectively.
  • the first LCOS light switching subunit 41, the second LCOS light switching subunit 42, the third LCOS optical switching subunit 43 and the fourth LCOS optical switcher may be disposed.
  • the size of each of the deflected position areas of unit 44 is the same,
  • the row spacing and column spacing of each of the third beam and the fifth beam are equal to the row spacing of each of the second beams.
  • the optical path diagram shown in FIG. 6 is a schematic diagram, and passes through the first LCOS optical switching subunit 41, passes through the second LCOS optical switching subunit 42, passes through the third LCOS optical switching subunit 43, and passes through the fourth LCOS.
  • the optical path of the light switching sub-unit 44 is actually reflected light, and the display has a display deflection relationship and is drawn by the refracted light graphic method.
  • the polarization separation device 2 may be a polarization beam splitter, for example, a polarizing beam splitter (PBS).
  • the polarization combining device 6 corresponds to the inverse of the polarization separation device 2, and may be realized by a polarization beam splitter.
  • the propagating optical paths of the two beams respectively outputting the two polarization states of the polarization beam splitter may be divergent or parallel.
  • the output optical path is a divergent polarization beam splitter output two polarization states of the beam and the input beam has a certain angle
  • the output optical path is a parallel polarization beam splitter output two polarization states of the beam and the input beam Parallel to each other, and the output positions of the two parallel output beams can also be set in advance.
  • the polarization separation device 2 and the polarization combining device 6 using the polarization beam splitter whose output optical path is a divergent polarization beam splitter can be set as follows:
  • the first beam the first polarization input from the polarization separation input position region is input.
  • the third beam outputted from the output position region and the fourth beam outputted from the second polarization separation output region are satisfied: the third beam and the fourth beam are coplanar and intersect with the first beam, the third beam and the third beam
  • the angle between a beam, the angle between the fourth beam and the first beam is equal to a preset polarization separation angle; and the third beam and the fourth beam corresponding to the polarization separation input position region in the same row are located
  • the planes coincide, and the planes of the third beam and the fourth beam corresponding to the polarization separation input position regions of different rows are parallel to each other.
  • the sixth beam, the fourth input of the first polarization composite input position region satisfy: the sixth beam, the eighth beam and the second beam are coplanar and intersect, the sixth beam and the sixth beam The angle between the angle of the two beams and the angle between the eighth beam and the second beam is equal to the preset polarization separation angle; and the sixth beam and the eighth beam corresponding to the polarization composite output position region in the same row.
  • the planes on which they are located coincide, and the planes of the sixth beam and the eighth beam corresponding to the polarization composite output position regions of different rows are parallel to each other.
  • the first deflection angle corresponding to the Xth input port is specifically according to the relative position of the first LCOS optical switching subunit 41 and the third LCOS optical switching subunit 43 and the first optical path offset parameter.
  • the concentrated Xth offset parameter and the preset polarization separation angle are determined;
  • the second deflection angle corresponding to the Xth input port is specifically according to the relative relationship between the second LCOS optical switching subunit 42 and the fourth LCOS optical switching subunit 44.
  • the position, the Xth offset parameter in the second optical path offset parameter set, and the preset polarization separation angle are determined.
  • the first deflection angle corresponding to the Xth input port is equal to the second deflection angle corresponding to the Xth input port; the third deflection angle corresponding to the Xth input port is equal to the Xth The fourth deflection angle corresponding to the input port.
  • the preset polarization separation angle is the angle between the two polarization states of the polarization separation device 2 and the incident light input to the polarization separation device 2, and the angle can be adopted by the polarization beam splitter.
  • the specific material property is determined, optionally, according to the distance between the polarization separating device 2 and the first LCOS light switching unit 45, the preset polarization separation angle is selected to meet the requirements of the respective third beam and each of the fourth beam outputs.
  • the arrangement of the polarization separation device 2 and the deflection combining device 6 using the output beam as a divergent polarization beam splitter can improve the utilization of the maximum deflection capability of the silicon-based CMOS circuit and the liquid crystal region used in the LCOS optical module 4. rate.
  • the optical cross-connector provided by the embodiment of the present invention may further include: an optical path converter 90, the optical path converter may be one or more lenses, and the optical path converter may be located in the first LCOS.
  • the optical switching unit 45 supplies the equivalent optical centers of the optical path converters 90 to the center of the first LCOS optical switching unit 45 on the optical paths of the deflected respective third and respective fifth beams outputted to the second LCOS optical switching unit 46. Connected to the center of the second LCOS light switching unit 46.
  • the optical path converter 90 can be disposed at an angle equal to the angle between the first plane and the second plane. That is, when the first plane is parallel to the second plane, the optical path converter 90 can be disposed parallel to the first plane.
  • the optical path converter 90 is disposed between the first LCOS optical switching unit 45 and the second LCOS optical switching unit 46 to perform a certain convergence on the beams output by the first LCOS optical switching subunit 41 and the second LCOS optical switching subunit 42. Therefore, the deflection angle of the first LCOS light switching subunit can be fully utilized effectively.
  • FIG. 10 is a schematic view of an optical path of a preferred embodiment of the second embodiment of the optical cross-connector of FIG. 5.
  • FIG. 10 is a schematic view of an optical path of a preferred embodiment of the second embodiment of the optical cross-connector of FIG. 5.
  • the distance between the equivalent optical center of the optical path converter 90 and the center of the first LCOS optical switching unit 45 may be equal to the distance between the optical path converter 90 and the center of the second LCOS optical switching unit 46. distance.
  • the center of the first LCOS light switching unit 45 is an array of deflected position regions composed of an array of deflected position regions of the first LCOS light switching subunit 41 and an array of deflected position regions of the second LCOS light switching subunit 42.
  • the center of the second LCOS light switching unit 46 is a deflected position region composed of an array of deflected position regions of the third LCOS light switching subunit 43 and an array of deflected position regions of the fourth LCOS light switching subunit 44. The center of the array.
  • the optical path converter 90 By setting the relative position between the optical path converter 90 and the first LCOS light switching unit 45 and the second LCOS light switching unit 46 in this manner, the optical path can be made symmetrical, and the structure of the optical cross connector is compact and easy to produce.
  • the distance between the center of the first LCOS light switching unit 45 and the center of the polarization separation device 2 may be equal to the equivalent focal length f of the optical path converter 90, and the center of the second LCOS light switching unit 46 and the polarization combining device 6 The distance between the centers is equal to the equivalent focal length f of the optical path converter 90.
  • the beam waist position the position where the beam divergence is the smallest can be called the beam waist position.
  • the optical path between the equivalent optical center of the optical path converter 90 and the center of the polarization separating device 2 is equal to twice the equivalent focal length f of the optical path converter 90, and the equivalent of the optical path converter 90.
  • the optical path between the optical center and the center of the polarization combining device 6 is equal to twice the equivalent focal length f of the optical path converter 90.
  • the center of the polarization separation device 2 is the center of the array of position regions consisting of P rows and Q columns of polarization separation input position regions
  • the center of the polarization composite device 6 is a row region array composed of P rows and Q columns of polarization composite output position regions. center.
  • the respective light beams output from the polarization separation device 2 can pass through the first LCOS light switching unit 45.
  • the spot that falls on the optical path converter 90 is the smallest, and the beam dispersion loss is small.
  • the optimal distance S 1 between the collimating mirror array 8 between the optical input device 1 and the polarization separating device 2 and the first LCOS optical switching unit 45 may be preferably determined according to formula (1):
  • ⁇ is the wavelength of light.
  • the distance between the collimating mirror array 8 located between the optical input device 1 and the polarization separating device 2 and the first LCOS light switching unit 45 is set such that the light beam outputted through the collimating mirror array is in the polarization separating device 2 and The spot on the first LCOS light switching unit 45 is the smallest, reducing the loss of beam dispersion.
  • the distance between the collimating mirror array 8 close to the light output device 7 and the second LCOS light switching unit 46 can be symmetrically set, which can be equal to the collimating mirror array 8 and the first LCOS near the optical input device 1.
  • the distance between the light switching units 45 to reduce the loss of beam dispersion Consumption.
  • the optical cross-connector provided by the embodiment of the invention has the requirement of large-scale port mapping, high control accuracy, simple overall structure process, compact structure, high utilization rate of the deflection angle of the LCOS material, and low overall structure cost.
  • FIG. 12 is a schematic structural view of a third embodiment of the optical cross-connector of the present invention
  • FIG. 13 is a schematic diagram of an optical path through the polarization separating device in the third embodiment of the optical cross-connector shown in FIG. 12
  • the following settings can be adopted in the optical cross-connection provided by the embodiment of the present invention.
  • the polarization separating device 2 and the polarization combining device 6 using the polarization beam splitter whose output optical path is parallel can be set as follows:
  • the first beam, the first polarization input from the polarization separation input position region is input.
  • Separating the third beam outputted from the output position region and the fourth beam outputting from the second polarization separation output position region satisfy: the third beam, the four beams being coplanar with the first beam, and the third beam and the fourth beam parallel.
  • the sixth beam and the second polarization composite input position region input by the first polarization composite input position region are input.
  • the eighth beam is equal to the second beam outputted from the polarization separation output position region, and the sixth beam, the eighth beam and the second beam are coplanar and parallel to each other.
  • the Z first polarization separation output position regions of the polarization separation device 2 are arranged in an array of P rows and Q columns, and the beam arrays composed of the respective third beams output from the respective first polarization separation output position regions of the polarization separation device 2
  • the row spacing and the column spacing are respectively equal;
  • the Z second polarization separation output location regions of the polarization separation device 2 are arranged in an array of P rows and Q columns, and are output by the respective second polarization separation output position regions of the polarization separation device 2.
  • the line spacing and column spacing of the beam arrays of the respective fourth beams are respectively equal.
  • the arrangement of the Z first polarization composite input position regions of the polarization combining device 6 is an array of P rows and Q columns, and each of the six polarizations of the first polarization composite input position region of the polarization combining device 6 is input.
  • the row spacing and the column spacing of the beam arrays of the beam are respectively equal;
  • the arrangement of the Z second polarization composite input position regions of the polarization combining device 6 is an array of P rows and Q columns, and each second polarization composite of the input polarization combining device 6
  • the line spacing and the column spacing of the beam arrays composed of the respective eighth beams of the input position area are respectively equal.
  • the positions of the respective deflection position regions of the first LCOS light switching unit 45 can be adjusted according to the respective output beams of the polarization separation device 2.
  • the arrangement of the first planes in the first plane can be referred to FIG. 14, and similarly, can be set.
  • the optical cross-connector of the embodiment of the present invention may further include: a first optical path converter 91 and a second optical path converter 92, a first optical path converter 91 and a second optical path converter.
  • 92 may be one or more lenses respectively, and the first optical path converter 91 is located on the propagation optical path of each of the deflected third light beams outputted by the first LCOS optical switching subunit 41 to the third LCOS optical switching subunit 43.
  • the two optical path converters 92 are located on the optical paths of the deflected fifth light beams output by the second LCOS optical switching subunit 42 to the fourth LCOS optical switching subunit 44, the first optical path converter 91 and the second optical path converter 92. Coplanar and parallel to the first plane.
  • the equivalent optical center of the first optical path converter 91 is located on the line connecting the center of the offset position area array of the first LCOS optical switching subunit 41 and the center of the deflection position area array of the third LCOS optical switching subunit 43. And the distance between the equivalent optical center of the first optical path converter 91 and the center of the offset position area array of the first LCOS optical switching subunit 41 is equal to that of the first optical path converter 91 and the third LCOS optical switching subunit 43.
  • the equivalent optical center of the second optical path converter 92 is located at the center of the array of deflected position regions of the second LCOS optical switching subunit 42 and the fourth LCOS optical switching subunit 44 Deviating the line of the center of the array of positional regions, and the distance between the second optical path converter 92 and the center of the array of deflected position regions of the second LCOS light switching subunit 42 is equal to the equivalent of the second optical path converter 92 The distance between the optical center and the center of the array of deflected position regions of the fourth LCOS light switching subunit 44.
  • the first optical path converter 91 and the second optical path converter 92 in the embodiment of the present invention are used to switch the first LCOS optical switching unit and the second LCOS optical switch.
  • the unit's maximum deflection capability can be fully utilized.
  • Embodiments of the present invention provide an optional implementation of an optical cross connector based on LCOS material. Way of application.
  • FIG. 15 is a schematic structural view of Embodiment 4 of the optical cross-connector of the present invention
  • FIG. 16 is a view showing distribution of each of the third light beams and the respective fourth light beams outputted by the polarization separating device in Embodiment 4 of the optical cross-connector shown in FIG.
  • FIG. 17 is a schematic diagram showing the distribution of the offset position area arrays of the first LCOS optical switching subunit and the second LCOS optical switching subunit in the fourth embodiment of the optical cross connector shown in FIG. 15.
  • the polarization separation device 2 and the polarization combining device 6 using the polarization beam splitter whose output optical path is parallel can also be set as follows:
  • the third beam, the fourth beam is coplanar with the first beam, and the three beams are parallel to the four beams;
  • the sixth beam and the first polarization composite input position region input by the first polarization composite input position region are coplanar and parallel to each other;
  • the Z first polarization separation output position regions and the Z second polarization separation output position regions of the polarization separation device 2 are arranged in a 2P row Q column beam array, and the Z first polarization separation output position regions are respectively located at the preset first
  • the rows in the row number group, the Z second polarization separation position regions are respectively rows in the preset second row number group, and the rows in the first row number group are different from the rows in the second row number group, and
  • the row spacing and the column spacing of the beam array of the 2P rows and Q columns composed of the respective third beams output from the respective first polarization separation output position regions of the polarization separation device 2 and the respective fourth beams output from the respective second polarization separation output position regions are equal
  • the third beam and the fourth beam from the same input port are located adjacent to each other in the same column;
  • the third light beam of the i-th row and the j-th column is deflected by the first LCOS light switching sub-unit 41 along the mth row and the nth column
  • the propagation path of the deflected third beam is transmitted, and the first LCOS light switching subunit 41 deflects the third beam of the i-th row and the j-th column by the direction of the first deflection angle and the third LCOS optical switching subunit 43.
  • the deflected third beam of the mth row and the nth column is deflected in the opposite direction of the third deflecting angle; for any one of the respective fourth beams, the second LCOS light switching subunit 42 is biased toward the fifth beam
  • the direction of the second deflection angle is opposite to the direction in which the fourth LCOS light switching subunit 44 deflects the deflected fifth beam by the fourth deflection angle.
  • each of the third beams may be located in odd rows or each of the fourth beams may be in odd rows.
  • Embodiments of the present invention provide a specific structure of an optical cross connector based on LCOS material.
  • FIG. 18 is a schematic structural view of an alternative embodiment of the fourth embodiment of the optical cross-connector of FIG. 15;
  • FIG. 19 is a third beam and each of the output of the polarization separating device of the optical cross-connector of FIG. Schematic diagram of the distribution of the fourth beam;
  • FIG. 20 is a schematic diagram showing the distribution of the array of deflected position regions of the first LCOS optical switching subunit and the second LCOS optical switching subunit in the optical cross connector shown in FIG.
  • FIG. 18 to FIG. 20 The structure diagram of the optical cross-connector in which the respective eighth light beams output by the polarization separating device 2 are located in odd rows can be shown in FIG. 18 to FIG. 20, and other details and technical effects of the technical solutions are the same as those shown in FIG. 15 to FIG.
  • the cross connector is similar and will not be described here.
  • Embodiments of the present invention provide an alternative embodiment of an optical cross-connector based on LCOS material.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
  • Optical Communication System (AREA)

Abstract

Selon l'invention, un interconnecteur optique partage des faisceaux lumineux respectifs en un premier état de polarisation et un deuxième état de polarisation en positionnant un séparateur de polarisation (2). Des convertisseurs de polarisation (3, 5) convertissent une composante avec le deuxième état de polarisation. Un module de commutation de lumière LCOS (4) effectue un décalage de trajet optique sur des composants avec le premier état de polarisation ou des composants convertis avec le premier état de polarisation. Les convertisseurs de polarisation (3, 5) et un dispositif composé de polarisation (6) restaurent les faisceaux lumineux puis les fournissent en sortie. L'interconnecteur optique ne présente pas de pertes par frottement et a une haute stabilité.
PCT/CN2015/085790 2015-07-31 2015-07-31 Interconnecteur optique WO2017020197A1 (fr)

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PCT/CN2015/085790 WO2017020197A1 (fr) 2015-07-31 2015-07-31 Interconnecteur optique
CN201580082019.8A CN107850736B (zh) 2015-07-31 2015-07-31 一种光交叉连接器

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CN110149165B (zh) * 2018-02-13 2021-06-15 华为技术有限公司 一种光交叉连接装置
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