CN208833951U - It is a kind of with photoswitch performance and adjustable two-way optical circulator - Google Patents

Abstract

The utility model discloses a kind of with photoswitch performance and adjustable two-way optical circulator, the optical circulator are provided with single optical fiber calibrator, the first birefringece crystal, the first half-wave plate, optically-active component, the second half-wave plate component, the second birefringece crystal and double-fiber collimator along optical path direction.Optically-active component includes faraday rotator, magnetic field producer part, half-wave plate and refractive element outside piece；Second half-wave plate component is by two pieces of identical second half wave plate groups at being equipped with an expanded core fiber in single optical fiber calibrator, two parallel expanded core fibers are equipped in double-fiber collimator.It is provided by the utility model to have photoswitch performance and adjustable two-way optical circulator, it can both realize circulator function, can also realize magneto-optic shutter function, and optical device used is less, small volume reduces production cost.

Description

It is a kind of with photoswitch performance and adjustable two-way optical circulator

Technical field

The utility model relates to fiber optic communication and optical circulator technical field, in particular to it is a kind of with photoswitch performance and Adjustable two-way optical circulator.

Background technique

Optical circulator and photoswitch are all the common devices in optic communication, and function is different, and optical circulator is a kind of multiport The optical device of input and output, its effect is to transmit optical signal can only along defined port order, when light is inputted by port 1 When, light is exported by port 2, and when light is inputted by port 2, light is exported by port 3, and so on.And it is largely used in optic communication The switching of the signal between one or more input optical fibres and multiple output optical fibres may be implemented in various photoswitches.

Current existing optical circulator and photoswitch volume are larger, and optical signal is one-way transmission, it can be achieved that two-way communication Circulator need grating device combined application.Utility model patent if notification number is CN102929001A discloses a kind of name It is created for the utility model of " magneto-optic shutter ".Two pieces of faraday rotators are used in this photoswitch, which can be achieved light The function of switch, but cannot achieve the reverse transmission of optical path, and and the function without circulator.Also there is not device same Shi Shixian circulator and two kinds of functions of switch, and transmitted in both directions light passing can be adjusted by magnetic control.

Utility model content

The purpose of the utility model is to provide a kind of with photoswitch performance and adjustable two-way optical circulator, can both realize Circulator function can also realize magneto-optic shutter function, and optical device used is less, small volume, reduce production cost.

To achieve the above object, the utility model provides following scheme:

It is a kind of with photoswitch performance and adjustable two-way optical circulator, the optical circulator include along optical path direction successively Single optical fiber calibrator, the first birefringece crystal, the first half-wave plate, optically-active component, the second half-wave plate component, second birefringent is set Crystal and double-fiber collimator；The optically-active component includes faraday rotator, magnetic field producer part, half-wave plate and refractor Part；

The expansion core for being equipped with an expanded core fiber in the single optical fiber calibrator, and being mounted in the single optical fiber calibrator Optical fiber is the first port of optical circulator；Two parallel expanded core fibers are installed in the double-fiber collimator, and are mounted on Two expanded core fibers in the double-fiber collimator are respectively the second port of the optical circulator, third port；

By the magnetic direction of the automatically controlled control magnetic field producer part, keep the loop direction of the optical circulator described The light beam coupling of second port is into the first port, and the light beam coupling of the first port is into the third port or described The loop direction of optical circulator is the light beam coupling of the third port into the first port, the light beam coupling of the first port It closes into the second port.

Optionally, by the magnetic direction of the automatically controlled control magnetic field producer part to realize described in the optical circulator The light beam coupling of first port is into the state of the second port and the light beam coupling of the first port into the third port State switching.

Optionally, the faraday rotator selects magneto-optical crystal film, and the half-wave plate selects quarter-wave plate, institute It states refractive element and selects wollaston prism, the magnetic field producer part is the coil of one section of winding, is loaded when to the coil When the DC current of different directions, the magnetic field of different directions is generated in the magnetic field producer part.

Optionally, the optically-active component is that the magneto-optical crystal film is attached to the quarter-wave on piece, then with it is rear The wollaston prism fitting set, is placed on the envelope for forming module in the magnetic field producer part and becoming one jointly Assembling structure.

Optionally, the wollaston prism is made of two pieces of prism wedges, respectively the first prism wedge, the second wedge shape Prism；The optical axis of first prism wedge is vertical with the optical axis of second prism wedge.

Optionally, the seamed edge of the optical axis of the quarter-wave plate and the wollaston prism is at 22.5 degree.

Optionally, first half-wave plate is between first birefringece crystal and the optically-active component, and is arranged Close to the lower half portion in the section of first birefringece crystal, and it is located across the optical path all the way of first birefringece crystal On；First half-wave plate is used to the polarization direction of the linearly polarized light of the optical path all the way of first birefringece crystal rotating 90 Degree.

Optionally, the area of first half-wave plate is the half of the area of section of first birefringece crystal.

Optionally, the second half-wave plate component is by two pieces of identical second half wave plate groups at every piece of second half-wave The area of piece is a quarter of the area of section of second birefringece crystal, and two pieces of the second half-wave plate diagonal lines It is arranged on the section of second birefringece crystal.

Optionally, the second half-wave plate component is arranged between the optically-active component and second birefringece crystal, And be located across in the two-way optical path of second birefringece crystal, in the optical path for adjusting second birefringece crystal The polarization state of light beam, it is ensured that the two-way light beam of incident second birefringece crystal is combined into a branch of and quasi- into double optical fiber Wherein all the way in optical fiber of straight device.

According to specific embodiment provided by the utility model, the utility model discloses following technical effects:

The utility model provides a kind of with photoswitch performance and adjustable two-way optical circulator, the optical circulator include Single optical fiber calibrator, the first birefringece crystal, the first half-wave plate, optically-active component, the second half-wave set gradually along optical path direction Piece component, the second birefringece crystal and double-fiber collimator；The optically-active component includes faraday rotator, magnetic field producer Part, half-wave plate and refractive element；A piece expanded core fiber is installed in single optical fiber calibrator, and is mounted in single optical fiber calibrator Expanded core fiber is the first port of optical circulator；Two parallel expanded core fibers are installed in double-fiber collimator, and are mounted on Two expanded core fibers in double-fiber collimator are respectively the second port of the optical circulator, third port；Pass through automatically controlled control The magnetic direction of magnetic field producer part processed makes the light beam coupling of the loop direction second port of optical circulator into first end Mouthful, the light beam coupling of first port is into the light beam coupling that the loop direction of third port or optical circulator is third port into the Single port, the light beam coupling of first port is into second port.Using the utility model, circulator function can be both realized, it can also be real Existing magneto-optic shutter function, and optical device used is less, and single optical fiber calibrator and double-fiber collimator are all made of and expand core light Fibre, small volume thereby reduce production cost.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this A little attached drawings obtain other attached drawings.

Fig. 1 is structural representation of the utility model embodiment one with photoswitch performance and adjustable two-way optical circulator Figure；

Fig. 2 is top view of the utility model embodiment one with photoswitch performance and adjustable two-way optical circulator；

Fig. 3 is main view of the utility model embodiment one with photoswitch performance and adjustable two-way optical circulator；

Fig. 4 is one quarter-wave plate optical axis figure of the utility model embodiment；

Fig. 5 is that one second port 02 of the utility model embodiment is coupled into 01 optical path light polarization of first port and position Schematic diagram；

Fig. 6 is that one first port 01 of the utility model embodiment is coupled into 03 optical path light polarization of third port and position Schematic diagram；

Fig. 7 is that two third port 03 of the utility model embodiment is coupled into 01 optical path light polarization of first port and position Schematic diagram；

Fig. 8 is that two first port 01 of the utility model embodiment is coupled into 02 optical path light polarization of second port and position Schematic diagram.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

The main purpose of the utility model is to provide a kind of circulator and has both the optical circulator of light switch function.

The another object of the utility model, which is to provide, a kind of can realize the optical circulator inversely transmitted by Electromagnetic Control.

A further object of the utility model is to provide a kind of light that optical device used is less, small in size, production cost is low Circulator.

To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing and have Body embodiment is described in further detail the utility model.

Embodiment one

Fig. 1 is structural schematic diagram of the utility model embodiment with photoswitch performance and adjustable two-way optical circulator； Fig. 2 is top view of the utility model embodiment with photoswitch performance and adjustable two-way optical circulator；Fig. 3 is that this is practical new Main view of the type embodiment with photoswitch performance and adjustable two-way optical circulator.

Referring to figures 1-3, optical circulator provided by the utility model mainly includes setting gradually single fiber along optical path direction Collimator 31, the first birefringece crystal 33, the first half-wave plate 34, optically-active component 35, the second half-wave plate component 43, second are birefringent Crystal 44 and double-fiber collimator 45.

In the present embodiment, an expanded core fiber 32, installation in double-fiber collimator 45 are installed in single optical fiber calibrator 31 There are two parallel expanded core fibers 32.An expanded core fiber 32 in single optical fiber calibrator 31 is the first port of optical circulator 01, two expanded core fibers 32 in double-fiber collimator 45 are respectively second port 02, the third port 03 of optical circulator.

Expanded core fiber is the condition for realizing miniaturization, is up to not in structure size if optical fiber does not carry out expanding core processing To the condition of small size.This be calculated according to the size of birefringece crystal in optical circulator come, simultaneously because existing Universal optical fibre condition is not achieved, can only expand core processing can be only achieved.Due to single optical fiber calibrator 31 in this programme and double optical fiber Optical fiber used is expanded core fiber 32 in collimator 45, the light beam being emitted from single optical fiber calibrator 31 or double-fiber collimator 45 Spot diameter it is smaller, 35 size of the first birefringece crystal 33, the second birefringece crystal 44 and optically-active component can be effectively reduced, The volume for reducing entire device, reduces cost.

In the present embodiment, optically-active component 35 includes magnetic field producer part, half-wave plate and the refraction outside faraday rotator, piece Device；Optically-active component 35 is integrated encapsulating structure.Wherein, faraday rotator selects magneto-optical crystal film 37, and half-wave plate is selected Quarter-wave plate 38, refractive element select wollaston prism, and magnetic field producer part 42 is the coil of one section of winding, to coil The DC current of different directions is loaded, the magnetic field of different directions is generated in coil.Magneto-optical crystal film 37 is attached to four/ It on one wave plate 38, then is bonded with the wollaston prism of postposition, is placed in magnetic field producer part 42 jointly and forms module, union Integral encapsulating structure.Fig. 4 it is found that the optical axis of quarter-wave plate 38 and the seamed edge of wollaston prism at 22.5 degree.

Magneto-optical crystal film 37 can effectively retain magnetic field after magnetic field is withdrawn, and realize optical circulator under no magnetic field state Still it can work.

Wollaston prism is made of two pieces of prism wedges, respectively the first prism wedge 40, the second prism wedge 41, and First prism wedge 40, the optical axis of the second prism wedge 41 are orthogonal.

In the present embodiment, the first half-wave plate 34 is placed on 33 right side of the first birefringece crystal, 34 area of the first half-wave plate For the half of 33 area of section of the first birefringece crystal.From Fig. 2 and Fig. 3 as it can be seen that the first half-wave plate 34 is close to the first birefringent crystalline substance The lower end side of body 33 is located across in the optical path all the way of the first birefringece crystal 33.By the light for setting the first half-wave plate 34 Shaft angle degree and be incident on the first half-wave plate 34 linear polarization light polarization direction angle, can the road Shi Gai linearly polarized light it is inclined Vibration direction is rotated by 90 °.

Preferably, the first half-wave plate 34 is located at from the optical path for the light beam all the way that the first birefringece crystal 33 is emitted, can The polarization state of the road Shi Gai light beam is rotated by 90 °.

In the present embodiment, the second half-wave plate component 43 is arranged between optically-active component 35 and the second birefringece crystal 44, the Two half-wave plate components 43 are by two pieces of identical second half wave plate groups at the area of every block of second half-wave plate is the second birefringece crystal The a quarter of 44 area of section, and two piece of second half-wave plate diagonal line is arranged on the section of the second birefringece crystal 44, And be located across in the two-way optical path of the second birefringece crystal 44, for adjusting the polarization state of the light beam in optical path, it is ensured that incident The two-way light beam of second birefringece crystal 44 can be combined into it is a branch of, subsequently into the wherein optical fiber all the way of double-fiber collimator 45 In.

By setting the optical axis angle of the second half-wave plate and being incident on the linear polarization light polarization direction of the second half-wave plate Angle, can the polarization direction of linearly polarized light on the road Shi Gai be rotated by 90 °.

Below in conjunction with the structure of the utility model, illustrate its working principle:

The optical circulator can be by the light beam coupling from second port 02 into first port 01, will be from first port 01 Light beam coupling is into third port 03, and by the automatically controlled magnetic direction for changing magnetic field producer part 42, loop direction can be become to the The light beam coupling of three ports 03 is into first port 01, by the light beam coupling of first port 01 into second port 02.

Specifically, the light beam coupling of second port 02 into 01 light polarization of first port and propagate position as shown in figure 5, The signal light that second port 02 enters is collimated into collimated light beam through double-fiber collimator 45, and light-beam position is in B8, by second pair Refracting crystal 44 is divided into the vertical o light and e light in two-way polarization direction, and light beam position is B7 at this time, wherein polarised light all the way By one piece of second half-wave plate in the second half-wave plate component 43, it is rotated by 90 ° its light polarization, light-beam position is at this time B6.The polarization state of two-beam is consistent at B6.Two-beam adopts wollaston prism unanimously, the polarization of light during passing through State does not change, but the position of light from it is original close to 44 one side of the second birefringece crystal among the second birefringece crystal 44 Mobile, light-beam position is in B5 at this time.Light beam passes through quarter-wave plate 38, the optical axis of quarter-wave plate 38 and the light polarization of B5 State is in 22.5 degree of angles, and the angle that light rotates under the action of quarter-wave plate 38 is the optical axis and B5 of quarter-wave plate 38 Twice of polarization state angle, that is, rotate 45 degree, at this time light beam position for Fig. 5 B4.Light prolongs the direction of propagation by magnetic Luminescent crystal film 37 makes magneto-optical crystal film 37 carry magnetic rotation by giving the pulse current of wound around coil prescribed direction Effect, so that light is made to rotate 45 degree, B3 of the light-beam position in Fig. 5.It is consistent at the polarization state and B5 in this time, wherein light passes through all the way The first half-wave plate 34 is crossed, light is rotated by 90 °, light-beam position is at the B2 of Fig. 5 at this time, and the polarization state of two-way light is in mutual at this time Plumbness, the orthogonal light of two-way polarization state enter the synthesis of the first birefringece crystal 33 and polarize unrelated light all the way from first pair It is exported in refracting crystal 33, the light of synthesis is coupled into first port 01 by single optical fiber calibrator 31.

The light beam coupling of first port 01 is into the light polarization of third port 03 and propagation position as shown in fig. 6, first The signal light that port 01 enters is collimated into collimated light beam through single optical fiber calibrator 31, and in the B1 of Fig. 6, light at this time is light-beam position Non- line polarisation.Light prolongs the direction of propagation into the first birefringece crystal 33, is divided into two-way polarization side in the first birefringece crystal 33 To vertical o light and e light, in the orthogonal line polarisation of two-way when light reaches the position B2.Wherein light prolongs the propagation side of light all the way It is rotated by 90 ° to by the polarization state of the first half-wave plate 34, the road Shi Ci light, the polarization state of two-way light is consistent at this time.Two-way light passes through Magneto-optical crystal film 37 guarantees that magneto-optical crystal film 37 carries magnetic rotation effect and second port 02 is coupled into first end at this time State consistency when mouth 01.Two-way light rotates 45 degree after passing through magneto-optical crystal film 37.Postrotational light passes through quarter-wave Piece 38, the polarization state and quarter-wave plate optical axis in this time are in 67.5 degree, and light rotates under the action of quarter-wave plate 38 Angle be the optical axis of quarter-wave plate 38 and the polarization state angle of B5 twice, that is, rotate 135 degree, the polarization in this time The B5 of state and position in Fig. 6.Postrotational light passes through wollaston prism, and the polarization state in this time does not change, but light Position is by original center to far from center.Deep two-way light wherein passes through the second half-wave plate component 43 all the way, by the The light of two half-wave plate components 43 is rotated by 90 °, and in the position B7 of Fig. 6, polarization state is orthogonal for optical path position and polarization state at this time Two-way light enters the second birefringece crystal 44, by the light of a branch of non-linear polarization state of the photosynthesis of the second birefringece crystal 44.It closes At light third port 03 is coupled by double-fiber collimator 45.

By the automatically controlled magnetic direction for changing magnetic field producer part 42, magnetic direction and second end described above at this time The light beam coupling of mouth 02 is opposite into magnetic direction needed for first port 01.By the magnetic direction for changing magnetic field producer part 42 Loop direction can be become to the light beam coupling of third port 03 into first port 01, by the light beam coupling of first port 01 into second Port 02.

The light beam coupling of third port 03 is as shown in Figure 7 into the light polarization of first port 01 and position.Third port 03 signal light entered is collimated into collimated light beam through double-fiber collimator 45, the B8 of light-beam position and polarization state such as Fig. 7, by the Two birefringece crystals 44 are divided into the vertical o light and e light in two-way polarization direction, and light beam position is B7 at this time, wherein all the way partially Light shake by one piece of second half-wave plate in the second half-wave plate component 43, is rotated by 90 ° its light polarization, at this time light beam position It is set to B6.The polarization state of two-beam is consistent at B6.Two-beam adopts wollaston prism unanimously, and light is inclined during Polarization state does not change, but the position of light from it is original close to 44 one side of the second birefringece crystal into the second birefringece crystal 44 Between move, light-beam position is in B5 at this time.For light beam by quarter-wave plate 38, the optical axis of quarter-wave plate 38 and the light of B5 are inclined Polarization state be in 67.5 degree angles, under the action of quarter-wave plate 38 light rotate angle be quarter-wave plate 38 optical axis and Twice of the polarization state angle of B5 rotates 135 degree, light beam position is the B4 of Fig. 7 at this time.Light prolongs direction of propagation process Magneto-optical crystal film 37 gives the pulse current direction of wound around coil and the light beam coupling of second port 02 into first port at this time Magnetic direction needed for 01 after given pulse current on the contrary, make magneto-optical crystal film 37 carry magnetic rotation effect, to make Light rotates 45 degree, B3 of the light-beam position in Fig. 7.It is consistent at the polarization state and B5 in this time, wherein light passes through the first half-wave all the way Piece 34, is rotated by 90 ° light, and light-beam position is at the B2 of Fig. 7 at this time, and the polarization state of two-way light is in being mutually perpendicular to state at this time, and two Polarization state orthogonal light in road enters the synthesis of the first birefringece crystal 33 and polarizes unrelated light all the way from the first birefringece crystal 33 The light of middle output, synthesis is coupled into input port 01 by single optical fiber calibrator 31.

The light beam coupling of first port 01 is into light polarization and the position of second port 02 as shown in figure 8, first port 01 signal light entered is collimated into collimated light beam through single optical fiber calibrator 31, and for light-beam position in the B1 of Fig. 8, light at this time is non-thread Polarisation.Light prolongs the direction of propagation into the first birefringece crystal 33, and two-way polarization direction is divided into the first birefringece crystal 33 and is hung down Straight o light and e light, in the orthogonal line polarisation of two-way when light reaches the position B2.The direction of propagation that wherein light prolongs light all the way passes through The first half-wave plate 34 is crossed, the polarization state of the road Shi Ci light is rotated by 90 °, and the polarization state of two-way light is consistent at this time.Two-way light passes through magneto-optic Crystal film 37 guarantees that magneto-optical crystal film 37 carries the light beam coupling of magnetic rotation effect and third port 03 into first at this time State consistency when port 01.Two-way light rotates 45 degree after passing through magneto-optical crystal film 37.Postrotational light passes through a quarter Wave plate 38, the polarization state in this time and the optical axis of quarter-wave plate 38 are in 22.5 degree, under the action of quarter-wave plate 38 The angle of light rotation is twice of the optical axis of quarter-wave plate 38 and the polarization state angle of B5, that is, rotates 45 degree, this time Polarization state and position Fig. 8 B5.Postrotational light passes through wollaston prism, and the polarization state in this time does not change, But the position of light is by original center to far from center.Deep two-way light wherein passes through the second half-wave plate component 43 all the way, It is rotated by 90 ° by the light of the second half-wave plate component 43, in the position B7 of Fig. 8, polarization state is mutual for optical path position and polarization state at this time Vertical two-way light enters the second birefringece crystal 44, by a branch of non-linear polarization state of the photosynthesis of the second birefringece crystal Light.The light of synthesis is coupled into third port 03 by double-fiber collimator 45.

Above example passes through the magnetic direction of automatically controlled magnetic field producer part 42, realizes the switching of circulator optical path direction.

Embodiment two

Structure involved by the present embodiment optical circulator and embodiment one are consistent, and the wave plate and crystal function and embodiment are one by one It causes.

Optical circulator be by control magnetic field producer part 42 magnetic direction, realize first port 01 light beam coupling into The light beam coupling of the state of second port 02 and first port 01 into third port 03 state switching.That is in magnetic field In the case that direction is certain, realizes one of state, then realized when changing the magnetic direction of magnetic field producer part 42 another State.If current working condition is the light beam coupling of first port 01 into second port 02.It is generated when changing magnetic field When the magnetic direction of device 42, realize optical path from the light beam coupling of first port 01 into third port 03.

The light beam coupling of first port 01 is into the light polarization of second port 02 and position such as Fig. 8 institute in the present embodiment Show, optical path working condition is consistent into 02 optical path of second port with the light beam coupling of first port 01 described in embodiment one.When cutting When changing the magnetic direction of magnetic field producer part 42, the light beam of first port 01 will be coupled into third port 03, and light beam at this time is inclined Polarization state and position are as shown in Figure 6.The light beam coupling of first port 01 described in optical path working condition and embodiment one is into third end 03 optical path of mouth is consistent.

Specific case used herein is expounded the principles of the present invention and embodiment, above embodiments Explanation be merely used to help understand the method and its core concept of the utility model；Meanwhile for the general technology of this field Personnel, based on the idea of the present invention, there will be changes in the specific implementation manner and application range.In conclusion The content of the present specification should not be construed as a limitation of the present invention.

Claims (10)

1. a kind of with photoswitch performance and adjustable two-way optical circulator, which is characterized in that the optical circulator includes along light Single optical fiber calibrator that road direction is set gradually, the first birefringece crystal, the first half-wave plate, optically-active component, the second half wave plate group Part, the second birefringece crystal and double-fiber collimator；The optically-active component include faraday rotator, magnetic field producer part, Half-wave plate and refractive element；

A piece expanded core fiber, and the expanded core fiber being mounted in the single optical fiber calibrator are installed in the single optical fiber calibrator For the first port of optical circulator；Two parallel expanded core fibers are installed in the double-fiber collimator, and are mounted on described Two expanded core fibers in double-fiber collimator are respectively the second port of the optical circulator, third port；

By the magnetic direction of the automatically controlled control magnetic field producer part, make the loop direction described second of the optical circulator The light beam coupling of port is into the first port, and the light beam coupling of the first port is into the third port or the light The loop direction of circulator is the light beam coupling of the third port into the first port, the light beam coupling of the first port Into the second port.

2. optical circulator according to claim 1, which is characterized in that pass through the magnetic of the automatically controlled control magnetic field producer part Field direction with realize the optical circulator the first port light beam coupling into the state of the second port and described the The light beam coupling of Single port into the third port state switching.

3. optical circulator according to claim 1, which is characterized in that the faraday rotator selects magneto-optical crystal thin Film, the half-wave plate are quarter-wave plate, and the refractive element selects wollaston prism, and the magnetic field producer part is one The coil of section winding generates different when to the DC current of coil load different directions in the magnetic field producer part The magnetic field in direction.

4. optical circulator according to claim 3, which is characterized in that the optically-active component is magneto-optical crystal film patch It is attached to the quarter-wave on piece, then is bonded with the wollaston prism of postposition, the magnetic field is placed on jointly and generates The encapsulating structure for forming module in device and becoming one.

5. optical circulator according to claim 3, which is characterized in that the wollaston prism is by two pieces of prism wedge groups At respectively the first prism wedge, the second prism wedge；The optical axis of first prism wedge and second prism wedge Optical axis is vertical.

6. optical circulator according to claim 5, which is characterized in that the optical axis of the quarter-wave plate and the wet drawing The seamed edge of this prism is at 22.5 degree.

7. optical circulator according to claim 1, which is characterized in that first half-wave plate is in the described first birefringent crystalline substance Between body and the optically-active component, and it is positioned close to the lower half portion in the section of first birefringece crystal, and is located at warp It crosses in the optical path all the way of first birefringece crystal；First half-wave plate is used for first birefringece crystal all the way The polarization direction of the linearly polarized light of optical path is rotated by 90 °.

8. optical circulator according to claim 7, which is characterized in that the area of first half-wave plate is described first pair The half of the area of section of refracting crystal.

9. optical circulator according to claim 1, which is characterized in that the second half-wave plate component is by two pieces identical Two half wave plate groups at, the area of every block of second half-wave plate be the area of section of second birefringece crystal four/ One, and two pieces of the second half-wave plate diagonal lines are arranged on the section of second birefringece crystal.

10. optical circulator according to claim 9, which is characterized in that the second half-wave plate component is arranged in the rotation It between optical assembly and second birefringece crystal, and is located across in the two-way optical path of second birefringece crystal, is used for Adjust the angle of polarization of the light beam in the optical path of second birefringece crystal, it is ensured that the two-way of incident second birefringece crystal Light beam is combined into a branch of, and enters wherein all the way in optical fiber of the double-fiber collimator.