CN202693929U - 2*2 high-speed mini-type all-solid magneto optical switch - Google Patents
2*2 high-speed mini-type all-solid magneto optical switch Download PDFInfo
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- CN202693929U CN202693929U CN 201220349274 CN201220349274U CN202693929U CN 202693929 U CN202693929 U CN 202693929U CN 201220349274 CN201220349274 CN 201220349274 CN 201220349274 U CN201220349274 U CN 201220349274U CN 202693929 U CN202693929 U CN 202693929U
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Abstract
The utility model relates to a 2*2 high-speed mini-type all-solid magneto optical switch. The 2*2 high-speed mini type all-solid magneto optical switch comprises a single fiber collimator assembly, a first double-refracting crystal, a Faraday rotating device, a second double-refracting crystal and a reflecting prism, which are sequentially arranged along the direction to which a light beam is incident; a first half wave plate is arranged between the first double-refracting crystal and the Faraday rotating device; a second half wave plate is arranged between the Faraday rotating device and the double-refracting crystal; a third half wave plate is arranged between the second double-refracting crystal and the reflecting prism; and controllable elements for providing magnetic fields are arranged around the Faraday rotating device. The 2*2 high-speed mini-type all-solid magneto optical switch provided by the utility model provides a light-path structure which is ingenious in arrangement of elements and compact in structure, therefore, fewer and smaller elements are used by the optical switches.
Description
Technical field
The utility model relates to optical element, specially refers to the magneto-optic shutter of realizing the control of light path break-make based on faraday's magnetic rotation effect.
Background technology
Optical switch component is one of significant components of all-optical network, in optical fiber network system, light signal carried out directly, intersects or the transmission of switching in many ways, optical communication system, sensor measuring field, instrument field, and national defense industry etc. use very widely.
The mode of realization photoswitch has a variety of, comprises mechanical optical switch, microelectron-mechanical (MEMS) formula photoswitch, and electric light formula photoswitch, the thermo-optic type photoswitch, acousto-optic type photoswitch and magneto-optic photoswitch etc., every kind of handoff technique has merits and demerits.Such as, mechanical optical switch can provide very little insertion power consumption and crosstalk effect.But the volume of mechanical optical switch is large, and adopts the engine driver part to realize the light path switching, is limited in switching time in millisecond scope, and the switch poor repeatability has limited serviceable life, has simultaneously the problem of reliability.And magneto-optic shutter is to utilize faraday's magnetic rotation effect to realize light path, because without any moving component, thereby superior reliability and switching response speed are arranged.
The elements such as 2x2 magneto-optic shutter technology general using double-fiber collimator, birefringece crystal, wave plate and Faraday rotator by processing and changing the incident polarized state of light, are realized the switching of photoswitch.But the employing double-fiber collimator, owing to have the problem of angle automatching, or adopt prism, or adopt wollaston prism, with the double-fiber collimator coupling, all affect greatly production efficiency.On the other hand, the 2x2 magneto-optic shutter that exists at present mostly adopts the transmission-type light channel structure, two ports, and the number of elements of use is many, do not utilize for making module and tray salver, and device volume is large.
The utility model content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of photoswitch of new version is provided.Photoswitch of the present utility model proposes a kind of element light channel structure ingenious, compact conformation is set, can be so that the employed number of elements of photoswitch is less, size is less.
In order to reach above-mentioned utility model purpose, the technical scheme that the utility model provides is as follows:
The all solid state magneto-optic shutter of a kind of 2x2 high-speed micro, it is characterized in that, this magneto-optic shutter structurally includes the single fiber collimator assembly that sets gradually along the light beam incident direction, the first birefringece crystal, Faraday rotator, the second birefringece crystal and reflecting prism, between described the first birefringece crystal and Faraday rotator, be provided with the first half-wave plate, before described Faraday rotator and the second birefringece crystal, be provided with the second half-wave plate, between described the second birefringece crystal and described reflecting prism, be provided with the 3rd half-wave plate, be provided with the controlled member that magnetic field is provided around the described Faraday rotator:
Described single fiber collimator assembly includes four single fiber collimating apparatuss of relatively independent setting, wherein has two to be input single fiber collimating apparatus, and two are output single fiber collimating apparatus;
Described the first birefringece crystal receives the laser beam from input single fiber collimating apparatus, a laser beam is separated into the light beam of two quadratures;
Described the first half-wave plate receives the orthogonal polarized light beam from the first birefringece crystal, and the light beam of two quadratures is converted into the light beam with identical polarization state;
Described Faraday rotator receives the light beam with identical polarization state from the first half-wave plate, and described controlled member applies magnetic field to change the polarization state of light beam around Faraday rotator;
The light beam that described the second half-wave plate receives from the Faraday rotator outgoing makes it be converted into corresponding orthogonal polarisation state;
Described the second birefringece crystal receives the light beam that has orthogonal polarisation state from the second half-wave plate, if the vertical then direct projection with optical axis of the polarization state of incident light, if the parallel then refraction with optical axis of the polarization state of incident light;
Described the 3rd half-wave plate receives the light beam from the second birefringece crystal, changes polarization state if the Faraday rotator forward leaves light beam 90 degree that then pass through, and does not change if the light polarization that then passes through oppositely left by Faraday rotator;
Described reflecting prism reception and reflection are from the light beam of the 3rd half-wave plate, the light beam of reflection optionally is incident to different output single fiber collimating apparatuss successively through the 3rd half-wave plate, the second birefringece crystal, the second half-wave plate, Faraday rotator, the first half-wave plate and the first birefringece crystal according to magnetic direction difference in the Faraday rotator.
In all solid state magneto-optic shutter of the utility model 2x2 high-speed micro, described controlled member changes the polarization state of light beam so that two output single fiber collimating apparatuss and the switching of two input single fiber collimating apparatuss by the magnetic field of the different numerical value of both direction.
In all solid state magneto-optic shutter of the utility model 2x2 high-speed micro, two output single fiber collimating apparatuss are respectively the first output single fiber collimating apparatus and the second output single fiber collimating apparatus, two input single fiber collimating apparatuss are respectively the first input single fiber collimating apparatus and the second input single fiber collimating apparatus, first state of photoswitch is that the light beam of the first input single fiber collimating apparatus output enters to the first output single fiber collimating apparatus, and the light beam of the second input single fiber collimating apparatus output enters to the second output single fiber collimating apparatus; Second state of photoswitch is that the light beam of the first input single fiber collimating apparatus output enters to the second output single fiber collimating apparatus, and the light beam of the second input single fiber collimating apparatus output enters to the first output single fiber collimating apparatus.
In all solid state magneto-optic shutter of the utility model 2x2 high-speed micro, under the first state of photoswitch, the light beam of the first input single fiber collimating apparatus outgoing is through the first birefringece crystal, be separated into respectively the light beam of two bundle quadratures, wherein a branch of is ordinary light, another bundle is extraordinary ray, light beam makes it have identical polarization state through described the first half-wave plate and is incident to Faraday rotator, 45 degree polarization variations occur and make light beam have identical polarization state P attitude through described Faraday rotator, this P attitude polarized light is converted into S attitude polarized light through described the second half-wave plate and is incident to described the second birefringece crystal, be transmitted to the 3rd half-wave plate after in the second birefringece crystal, reflecting as extraordinary ray, S attitude polarized light polarization state transfers to reflecting prism through the 3rd half-wave plate unchangeably, through the S attitude polarized light of reflecting prism reflection through constant second birefringece crystal that transfers to of the 3rd half-wave plate polarization, as extraordinary ray refraction occuring becomes P attitude polarized light by described the second half-wave plate in the second birefringece crystal, the polarized light of P attitude is incident to Faraday rotator makes polarization state rotation 45 degree be incident to the first half-wave plate, the light beam that is converted into two bundle orthogonal polarisation state through described the first half-wave plate is incident to described the first birefringece crystal, is incident to the first output single fiber collimating apparatus through the synthetic light beam of described the first birefringece crystal;
The light beam of the second input single fiber collimating apparatus outgoing is through the first birefringece crystal, be separated into respectively the light beam of two bundle quadratures, wherein a branch of is ordinary light, another bundle is extraordinary ray, light beam makes it have identical polarization state through described the first half-wave plate and is incident to Faraday rotator, 45 degree polarization variations occur and make light beam have identical polarization state P attitude through described Faraday rotator, this P attitude polarized light is incident to described the second birefringece crystal through described the second half-wave plate polarization state is constant, in the second birefringece crystal as after the ordinary light rectilinear propagation to the 3rd half-wave plate, P attitude polarized light transfers to reflecting prism through the 3rd half-wave plate, P attitude polarized light through the reflecting prism reflection transfers to the second birefringece crystal unchangeably through the 3rd half-wave plate polarization state, constant to described the second half-wave plate polarization state as ordinary light generation rectilinear propagation in the second birefringece crystal, the polarized light of P attitude is incident to Faraday rotator makes polarization state rotation 45 degree be incident to the first half-wave plate, the light beam that is converted into two bundle orthogonal polarisation state through described the first half-wave plate is incident to described the first birefringece crystal, is incident to the second output single fiber collimating apparatus through the synthetic light beam of described the first birefringece crystal.
In all solid state magneto-optic shutter of the utility model 2x2 high-speed micro, under the second state of photoswitch, the light beam of the first input single fiber collimating apparatus outgoing is through the first birefringece crystal, be separated into respectively the light beam of two bundle quadratures, wherein a branch of is ordinary light, another bundle is extraordinary ray, light beam makes it have identical polarization state through described the first half-wave plate and is incident to Faraday rotator, negative 45 degree polarization variations occur and make light beam have identical polarization state S attitude through described Faraday rotator, this S attitude polarized light is converted into P attitude polarized light through described the second half-wave plate and is incident to described the second birefringece crystal, in the second birefringece crystal as ordinary light rectilinear propagation to the three half-wave plates, P attitude polarized light is converted into S attitude polarized light through the 3rd half-wave plate and transfers to reflecting prism, S attitude polarized light through the reflecting prism reflection transfers to the second birefringece crystal unchangeably through the 3rd half-wave plate polarization, it is constant by described the second half-wave plate polarization state as extraordinary ray refraction to occur in the second birefringece crystal, the polarized light of S attitude is incident to Faraday rotator makes negative 45 degree of polarization state rotation be incident to the first half-wave plate, the light beam that is converted into two bundle orthogonal polarisation state through described the first half-wave plate is incident to described the first birefringece crystal, is incident to the second output single fiber collimating apparatus through the synthetic light beam of described the first birefringece crystal;
The light beam of the second input single fiber collimating apparatus outgoing is through the first birefringece crystal, be separated into respectively the light beam of two bundle quadratures, wherein a branch of is ordinary light, another bundle is extraordinary ray, light beam makes it have identical polarization state through described the first half-wave plate and is incident to Faraday rotator, negative 45 degree polarization variations occur and make light beam have identical polarization state S attitude through described Faraday rotator, this S attitude polarized light is incident to described the second birefringece crystal through described the second half-wave plate polarization state is constant, in the second birefringece crystal as after the ordinary light rectilinear propagation to the 3rd half-wave plate, S attitude polarized light becomes the P attitude through the 3rd half-wave plate polarization state and transfers to reflecting prism, P attitude polarized light through the reflecting prism reflection transfers to the second birefringece crystal unchangeably through the 3rd half-wave plate polarization state, in the second birefringece crystal as ordinary light generation rectilinear propagation to described the second half-wave plate, P attitude polarized light becomes S attitude polarized light through the second half-wave plate, the polarized light of S attitude is incident to Faraday rotator makes negative 45 degree of polarization state rotation be incident to the first half-wave plate, the light beam that is converted into two bundle orthogonal polarisation state through described the first half-wave plate is incident to described the first birefringece crystal, is incident to the first output single fiber collimating apparatus through the synthetic light beam of described the first birefringece crystal.
In all solid state magneto-optic shutter of the utility model 2x2 high-speed micro, described controlled member is for being used for regulating near the magnetic element of the magnetic field of Faraday rotator size, and described magnetic element is electromagnet or is permanent magnet.
Based on above-mentioned technology contents, reflective optical switch of the present utility model compared with prior art has following technological merit:
1. the optical switch that provides of the utility model adopts the reflecting light line structure, does not have movable part, and the optical property that can provide has high switch speed, and can be to realize in the very little dimensional space.
2. magneto-optic shutter of the present utility model can reduce the required optical element of photoswitch manufacturing in practice, realizes compact conformation, the modularization of element, and itself and polarization state are had nothing to do.
3. magneto-optic shutter of the present utility model can be realized random control and clog-free ground of the input port interconnecting and switching to light signal, can be developed into the full optical cross-connection equipment of various types of optical fiber and fiber optic protection change-over switch equipment, is widely used in optical communication field.
Description of drawings
Fig. 1 is the structural arrangement synoptic diagram of all solid state magneto-optic shutter of the utility model 2x2 high-speed micro.
Fig. 2 is that light beam is from the first optics input single optical fiber calibrator to the second output single optical fiber calibrator in all solid state magneto-optic shutter of the utility model 2x2 high-speed micro, and the second optics input single optical fiber calibrator to the first is exported the application synoptic diagram of single optical fiber calibrator.
Fig. 3 is that light beam is from the first optics input single optical fiber calibrator to the first output single optical fiber calibrator in all solid state magneto-optic shutter of the utility model 2x2 high-speed micro, and the second optics input single optical fiber calibrator to the second is exported the application synoptic diagram of single optical fiber calibrator.
Fig. 4 is that light beam is exported single optical fiber calibrator from the first optics input single optical fiber calibrator to the second in all solid state magneto-optic shutter of the utility model 2x2 high-speed micro, during the second optics input single optical fiber calibrator to the first output single optical fiber calibrator, by the polarization state variation synoptic diagram of each parts.
Fig. 5 is that light beam is exported single optical fiber calibrator from the first optics input single optical fiber calibrator to the first in all solid state magneto-optic shutter of the utility model 2x2 high-speed micro, during the second optics input single optical fiber calibrator to the second output single optical fiber calibrator, by the polarization state variation synoptic diagram of each parts.
Fig. 6 is another structural representation of all solid state magneto-optic shutter of the utility model 2x2 high-speed micro.
Fig. 7 is the composition synoptic diagram of another kind of the second birefringece crystal in all solid state magneto-optic shutter of the utility model 2x2 high-speed micro.
Embodiment
Below we come reflecting light of the present utility model opened the light to do further to elaborate with specific embodiment by reference to the accompanying drawings; in the hope of understanding its structure composition, principle of work and assembly conversion more cheer and brightly, but can not limit protection domain of the present utility model with this.
Magneto-optic shutter during Fig. 1 shows is a kind of novel optical switch 100, the arrangement of the optics of (being called for short hereinafter switch 100).Switch 100 is as an optical switch, and it adopts the reflecting light line structure, does not have movable part.The utility model provides one to have good optical property, has high switch speed, and can be with the optical element of a very little dimensional space realization.Structurally, switch 100 of the present utility model has comprised four single optical fiber calibrators, namely the first input single optical fiber calibrator 110, the second input single optical fiber calibrator 111, the first output single optical fiber calibrator 112, second are exported single optical fiber calibrator 113, the first birefringece crystal 125, the first half-wave plate 127, a Faraday rotator 130, an electromagnet 135, the second half-wave plate 140, the second birefringece crystal 145,150, one reflecting prisms 160 of the 3rd half-wave plate, the reflecting prism here are a right-angle prism.The effect of switch 100 is to switch the first input single optical fiber calibrator 110 and the entrained input beam of the second input single optical fiber calibrator 111 between the first output single optical fiber calibrator 112 and the second output single optical fiber calibrator 113.
In photoswitch of the present utility model, the first birefringece crystal 125 is arranged on the front of four optical fiber collimators, and it receives the laser beam from the laser beam of the first input single optical fiber calibrator 110 and the second input single optical fiber calibrator 111.The first birefringece crystal 125 is to be made of birefringece crystal material such as kalzit, its effect is light beam or the light that the beam of laser light beam is separated or is separated into two bundle quadratures: ordinary light and the extraordinary ray with refractive index n e with refractive index n o, wherein, ordinary light is referred to as o light, and extraordinary ray is called for short e light.
The first half-wave plate 127 is arranged on the front of the first birefringece crystal 120, receives the light beam from the first birefringece crystal 125.The first half-wave plate 127 is half-wave plates of associativity, and its optical axis is determined direction, so that the light beam that passes through has identical polarization state.
Faraday rotator 130 and electromagnet 135 are arranged on the position of contiguous the first half-wave plate 127, and it receives the light beam from the first half-wave plate 127.Faraday rotator 130 is made by the material that can make the polarization state rotation.The Beam rotation amount is the function of Faraday rotator 130 thickness.Formula is: θ=k*B*L, and wherein, k is coefficient, and B is magnetic field intensity, and L is the thickness of Faraday rotator.
When electromagnet 135 applied the first direction electromagnetic field to Faraday rotator 130, Faraday rotator 130 made negative 45 degree of light polarization rotation.When electromagnet 135 applied the second direction electromagnetic field to Faraday rotator 130, Faraday rotator 130 was light polarization rotation 45 degree.Perhaps, can change electromagnetic intensity and reach identical effect.
The second half-wave plate 140 is arranged on the position of contiguous Faraday rotator 130, receives the light beam from Faraday rotator 130, and the special angle that the second half-wave plate 140 has makes light beam have the polarization state of quadrature.
The second birefringece crystal 145 is arranged on the place of contiguous the second half-wave plate 140, receives the light beam from the second half-wave plate 140.The second birefringece crystal 145 is made of birefringece crystal material such as kalzit.
The 3rd half-wave plate 150 is arranged on the position of contiguous the second birefringece crystal 145, receives the light beam from the second birefringece crystal 145.The special angle that the 3rd half-wave plate 150 has makes the polarization state that has quadrature by the light beam of the 3rd half-wave plate 150.
Reflecting prism 160 is arranged on the position of contiguous the 3rd half-wave plate 150, receives the light beam from the 3rd half-wave plate 150.Light beam by the 3rd half-wave plate 150 is reflected prism 160 reflections.Reflecting prism 160 is adjusted or arranges with respect to the 3rd half-wave plate 150, so that light beam is reflected back toward the 3rd half-wave plate 150.
Fig. 2 and Fig. 3 illustrated switch 100 with light beam 400 from the first input single optical fiber calibrator 110 to first output single optical fiber calibrators 112, light beam 450 is from the applicable cases of the second input single optical fiber calibrator 111 to second output single optical fiber calibrators 113.Fig. 3 has showed light beam and parts, and Fig. 4 has showed the polarization state of light beam by switch 100 each parts light beam.
At first, light beam 400 transfers to the first input single optical fiber calibrator 110, be outgoing beam 20 through the first input single optical fiber calibrator 110 collimations, then outgoing beam 20 enters light beam 30 and the light beam 31 that the first birefringece crystal 125, the first birefringece crystals 125 are divided into light beam two quadratures.The optical axis of the first birefringece crystal 125 is positioned at surface level (being paper), the outgoing beam 20(random polarization state that can be penetrated by the first input single optical fiber calibrator 110) two parallel light beams that are decomposed into the polarization direction quadrature and spatially separate, two parallel light beams 30 and light beam 31 then by the first half-wave plate 127, the first half-wave plates 127 so that light beam 30, light beam 31 have identical polarization state.Light beam 30, light beam 31 are then by Faraday rotator 130.The thickness of Faraday rotator 130 is selected, so that when having the first direction electromagnetic field, and when light beam passes through Faraday rotator 130, negative 45 degree of polarization state rotation.So, light beam by Faraday rotator 130 just has identical polarization state S attitude, light beam 30, light beam 31 are then by the second half-wave plate 140, and the polarization state of light beam 30 and light beam 31 all changes 90 degree simultaneously, has identical polarization state P light.At this moment, light beam 30, light beam 31 are all o light in 145 rectilinear propagations of the second birefringece crystal.Light beam 30 and light beam 31 by the second birefringece crystal 145 pass through the 3rd half-wave plate 150 again, and polarization state 90 degree occurs changes, and becomes S attitude polarized light.Light beam 30 and light beam 31 are reflected back the 150 interior propagation of the 3rd half-wave plate by reflecting prism 160 again.Light beam 30 and light beam 31 do not change through the 3rd half-wave plate 150 polarization states, still are S attitude polarized light.Light beam 30 and light beam 31 are e light and reflect by the second birefringece crystal 145.Light beam 30 and light beam 31 are by the second half-wave plate 140, and polarization state S attitude remains unchanged.When light beam passes through Faraday rotator 130, negative 45 degree of polarization state rotation, then light beam 30 and light beam 31 are by the first half-wave plate 127, make light beam 30 and light beam 31 light beam cross polarizations, then light beam is merged into an independently light beam 22 by the first birefringece crystal 125, and light beam 22 is directed into the first output single optical fiber calibrator 112.
Fig. 4 and Fig. 5 illustrated switch 100 with light beam 500 from the first input single optical fiber calibrator 110 to second output single optical fiber calibrators 113, light beam 550 is from the applicable cases of the second input single optical fiber calibrator 111 to first output single optical fiber calibrators 112.Fig. 5 has showed light beam and parts, and Fig. 6 has showed the polarization state of light beam by switch 100 each parts light beam.
At first, light beam 500 transfers to the first input single optical fiber calibrator 110, be outgoing beam 20 through collimating device collimation, then outgoing beam 20 enters light beam 34 and the light beam 35 that the first birefringece crystal 125, the first birefringece crystals 125 are divided into light beam two quadratures.Then light beam 34 and light beam 35 pass through the first half-wave plate 127, the first half-wave plates 127 so that two light beams have identical polarization state.Light beam 34 and light beam 35 are then by Faraday rotator 130.The thickness of Faraday rotator 130 is selected, so that when having the second direction electromagnetic field, when light beam passed through Faraday rotator 130, polarization state 45 degree occured changes.So, light beam has identical polarization state P attitude, and light beam 34 and light beam 35 are then by the second half-wave plate 140, and the polarization state of light beam 34 and light beam 35 is 90-degree rotation simultaneously, and light beam has identical polarization state S attitude.At this moment, light beam 34 and light beam 35 are all e light and reflect at the second birefringece crystal 145.Light beam 34 and light beam 35 are by the 3rd half-wave plate 150, and polarization state remains unchanged and still is the S attitude.Light beam 34 and light beam 35 return the 150 interior propagation of the 3rd half-wave plate by reflecting prism 160 back reflections.Light beam 34 and light beam 35 do not change through the 3rd half-wave plate 150 rear polarizer attitudes, and polarization state is the S attitude.Light beam 34 and light beam 35 are all e light by the second birefringece crystal 145, reflect.Light beam 34 and light beam 35 are by the second half-wave plate 140, polarization state 90-degree rotation.Light beam 34 and light beam 35 are by Faraday rotator 130,45 degree occur and change in polarization state, then light beam 34 and light beam 35 are by the first half-wave plate 127, make light beam 34 and light beam 35 cross polarizations, be merged into an independently light beam 23 by the first birefringece crystal 120, light beam 23 enters the second output single optical fiber calibrator 113.
The function of magneto-optic shutter 200 is the same with the embodiment of magneto-optic shutter 100, and its difference is the mode of the putting difference of its crystal element, can be with reference to Fig. 6.
Wherein the birefringece crystal among Fig. 7 201 has specific relative structure with birefringece crystal 202.Be illustrated in figure 7 as example and describe, the optical axis of the optical axis of birefringece crystal 201 and birefringece crystal 202 is all on the XZ plane, and the optical axis of the optical axis of birefringece crystal 201 and birefringece crystal 202 is symmetrical about Z axis.
The embodiment of another magneto-optic shutter 200 can be carried out with reference to the embodiment of magneto-optic shutter 100, no longer describes here.
The a large amount of embodiment of the utility model is described.Yet the various modifications of making in the situation that does not depart from the utility model spirit and scope are understandable.For example, described photoswitch adopts a port organization, receives and the emission light beam with relatively independent one or more single line collimating apparatuss.Therefore those of ordinary skills can make some modifications in the situation of the spirit and scope that do not depart from claims.
Claims (6)
1. all solid state magneto-optic shutter of 2x2 high-speed micro, it is characterized in that, this magneto-optic shutter structurally includes the single fiber collimator assembly that sets gradually along the light beam incident direction, the first birefringece crystal, Faraday rotator, the second birefringece crystal and reflecting prism, between described the first birefringece crystal and Faraday rotator, be provided with the first half-wave plate, before described Faraday rotator and the second birefringece crystal, be provided with the second half-wave plate, between described the second birefringece crystal and described reflecting prism, be provided with the 3rd half-wave plate, be provided with the controlled member that magnetic field is provided around the described Faraday rotator:
Described single fiber collimator assembly includes four single fiber collimating apparatuss of relatively independent setting, wherein has two to be input single fiber collimating apparatus, and two are output single fiber collimating apparatus;
Described the first birefringece crystal receives the laser beam from input single fiber collimating apparatus, a laser beam is separated into the light beam of two quadratures;
Described the first half-wave plate receives the orthogonal polarized light beam from the first birefringece crystal, and the light beam of two quadratures is converted into the light beam with identical polarization state;
Described Faraday rotator receives the light beam with identical polarization state from the first half-wave plate, and described controlled member applies magnetic field to change the polarization state of light beam around Faraday rotator;
The light beam that described the second half-wave plate receives from the Faraday rotator outgoing makes it be converted into corresponding orthogonal polarisation state;
Described the second birefringece crystal receives the light beam that has orthogonal polarisation state from the second half-wave plate, if the vertical then direct projection with optical axis of the polarization state of incident light, if the parallel then refraction with optical axis of the polarization state of incident light;
Described the 3rd half-wave plate receives the light beam from the second birefringece crystal, changes polarization state if the Faraday rotator forward leaves light beam 90 degree that then pass through, and does not change if the light polarization that then passes through oppositely left by Faraday rotator;
Described reflecting prism reception and reflection are from the light beam of the 3rd half-wave plate, the light beam of reflection optionally is incident to different output single fiber collimating apparatuss successively through the 3rd half-wave plate, the second birefringece crystal, the second half-wave plate, Faraday rotator, the first half-wave plate and the first birefringece crystal according to magnetic direction difference in the Faraday rotator.
2. all solid state magneto-optic shutter of a kind of 2x2 high-speed micro according to claim 1, it is characterized in that, described controlled member by both direction different numerical value electric fields or the magnetic field polarization state that changes light beam so that two output single fiber collimating apparatuss and two input single fiber collimating apparatuss switch.
3. all solid state magneto-optic shutter of a kind of 2x2 high-speed micro according to claim 2, it is characterized in that, two input single fiber collimating apparatuss are respectively the first input single fiber collimating apparatus and the second input single fiber collimating apparatus, two output single fiber collimating apparatuss are respectively the first output single fiber collimating apparatus and the second output single fiber collimating apparatus, first state of photoswitch is that the light beam of the first input single fiber collimating apparatus output enters to the first output single fiber collimating apparatus, and the light beam of the second input single fiber collimating apparatus output enters to the second output single fiber collimating apparatus; Second state of photoswitch is that the light beam of the first input single fiber collimating apparatus output enters to the second output single fiber collimating apparatus, and the light beam of the second input single fiber collimating apparatus output enters to the first output single fiber collimating apparatus.
4. all solid state magneto-optic shutter of a kind of 2x2 high-speed micro according to claim 3, it is characterized in that, under the first state of photoswitch, the light beam of the first input single fiber collimating apparatus outgoing is through the first birefringece crystal, be separated into respectively the light beam of two bundle quadratures, wherein a branch of is ordinary light, another bundle is extraordinary ray, light beam makes it have identical polarization state through described the first half-wave plate and is incident to Faraday rotator, negative 45 degree polarization variations occur and make light beam have identical polarization state P attitude through described Faraday rotator, this P attitude polarized light is converted into S attitude polarized light through described the second half-wave plate and is incident to described the second birefringece crystal, be transmitted to the 3rd half-wave plate after in the second birefringece crystal, reflecting as extraordinary ray, S attitude polarized light polarization state transfers to reflecting prism through the 3rd half-wave plate unchangeably, through the S attitude polarized light of reflecting prism reflection through constant second birefringece crystal that transfers to of the 3rd half-wave plate polarization, as extraordinary ray refraction occuring becomes P attitude polarized light by described the second half-wave plate in the second birefringece crystal, the polarized light of P attitude is incident to Faraday rotator makes negative 45 degree of polarization state rotation be incident to the first half-wave plate, the light beam that is converted into two bundle orthogonal polarisation state through described the first half-wave plate is incident to described the first birefringece crystal, is incident to the first output single fiber collimating apparatus through the synthetic light beam of described the first birefringece crystal;
The light beam of the second input single fiber collimating apparatus outgoing is through the first birefringece crystal, be separated into respectively the light beam of two bundle quadratures, wherein a branch of is ordinary light, another bundle is extraordinary ray, light beam makes it have identical polarization state through described the first half-wave plate and is incident to Faraday rotator, negative 45 degree polarization variations occur and make light beam have identical polarization state P attitude through described Faraday rotator, this P attitude polarized light is incident to described the second birefringece crystal through described the second half-wave plate polarization state is constant, in the second birefringece crystal as after the ordinary light rectilinear propagation to the 3rd half-wave plate, P attitude polarized light transfers to reflecting prism through the 3rd half-wave plate, P attitude polarized light through the reflecting prism reflection transfers to the second birefringece crystal unchangeably through the 3rd half-wave plate polarization state, constant to described the second half-wave plate polarization state as ordinary light generation rectilinear propagation in the second birefringece crystal, the polarized light of P attitude is incident to Faraday rotator makes negative 45 degree of polarization state rotation be incident to the first half-wave plate, the light beam that is converted into two bundle orthogonal polarisation state through described the first half-wave plate is incident to described the first birefringece crystal, is incident to the second output single fiber collimating apparatus through the synthetic light beam of described the first birefringece crystal.
5. all solid state magneto-optic shutter of a kind of 2x2 high-speed micro according to claim 3, it is characterized in that, under the second state of photoswitch, the light beam of the first input single fiber collimating apparatus outgoing is through the first birefringece crystal, be separated into respectively the light beam of two bundle quadratures, wherein a branch of is ordinary light, another bundle is extraordinary ray, light beam makes it have identical polarization state through described the first half-wave plate and is incident to Faraday rotator, 45 degree polarization variations occur and make light beam have identical polarization state S attitude through described Faraday rotator, this S attitude polarized light is converted into P attitude polarized light through described the second half-wave plate and is incident to described the second birefringece crystal, in the second birefringece crystal as ordinary light rectilinear propagation to the three half-wave plates, P attitude polarized light is converted into S attitude polarized light through the 3rd half-wave plate and transfers to reflecting prism, S attitude polarized light through the reflecting prism reflection transfers to the second birefringece crystal unchangeably through the 3rd half-wave plate polarization, it is constant by described the second half-wave plate polarization state as extraordinary ray refraction to occur in the second birefringece crystal, the polarized light of S attitude is incident to Faraday rotator makes polarization state rotation 45 degree be incident to the first half-wave plate, the light beam that is converted into two bundle orthogonal polarisation state through described the first half-wave plate is incident to described the first birefringece crystal, is incident to the second output single fiber collimating apparatus through the synthetic light beam of described the first birefringece crystal;
The light beam of the second input single fiber collimating apparatus outgoing is through the first birefringece crystal, be separated into respectively the light beam of two bundle quadratures, wherein a branch of is ordinary light, another bundle is extraordinary ray, light beam makes it have identical polarization state through described the first half-wave plate and is incident to Faraday rotator, 45 degree polarization variations occur and make light beam have identical polarization state S attitude through described Faraday rotator, this S attitude polarized light is incident to described the second birefringece crystal through described the second half-wave plate polarization state is constant, in the second birefringece crystal as after the ordinary light rectilinear propagation to the 3rd half-wave plate, S attitude polarized light becomes the P attitude through the 3rd half-wave plate polarization state and transfers to reflecting prism, P attitude polarized light through the reflecting prism reflection transfers to the second birefringece crystal unchangeably through the 3rd half-wave plate polarization state, in the second birefringece crystal as ordinary light generation rectilinear propagation to described the second half-wave plate, P attitude polarized light becomes S attitude polarized light through the second half-wave plate, the polarized light of S attitude is incident to Faraday rotator makes polarization state rotation 45 degree be incident to the first half-wave plate, the light beam that is converted into two bundle orthogonal polarisation state through described the first half-wave plate is incident to described the first birefringece crystal, is incident to the first output single fiber collimating apparatus through the synthetic light beam of described the first birefringece crystal.
6. all solid state magneto-optic shutter of a kind of 2x2 high-speed micro according to claim 1 is characterized in that, described controlled member is for being used for regulating near the magnetic element of the magnetic field of Faraday rotator size, and described magnetic element is electromagnet or is permanent magnet.
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| CN 201220349274 CN202693929U (en) | 2012-07-19 | 2012-07-19 | 2*2 high-speed mini-type all-solid magneto optical switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220349274 CN202693929U (en) | 2012-07-19 | 2012-07-19 | 2*2 high-speed mini-type all-solid magneto optical switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212789A (en) * | 2017-07-03 | 2019-01-15 | 福州高意通讯有限公司 | A kind of photoswitch of quick 1XN |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212789A (en) * | 2017-07-03 | 2019-01-15 | 福州高意通讯有限公司 | A kind of photoswitch of quick 1XN |
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