CN208432822U - Reflection-type magneto-optic switch - Google Patents
Reflection-type magneto-optic switch Download PDFInfo
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- CN208432822U CN208432822U CN201821301718.4U CN201821301718U CN208432822U CN 208432822 U CN208432822 U CN 208432822U CN 201821301718 U CN201821301718 U CN 201821301718U CN 208432822 U CN208432822 U CN 208432822U
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- light beam
- birefringece crystal
- wave plate
- collimater
- reflection
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Abstract
A kind of reflection-type magneto-optic switch, the combination comprising input collimater, the first output collimater, second output terminal collimator, prism, first birefringece crystal, the first half-wave plate pair, the combination of Farady rotator and magnetic element, second birefringece crystal, the second half-wave plate pair, right-angle prism.The magnetic element can apply saturation magnetic field on the Farady rotator, it is exported so as to cause the light beam inputted from input collimater from the first output collimater, or the magnetic element can not apply magnetic field on the Farady rotator, export so as to cause the light beam inputted from input collimater from second output terminal collimator.
Description
Technical field
The utility model relates to a kind of reflection-type magneto-optic switches, more particularly to the reflection-type magneto-optic comprising faraday's crystal to open
It closes.
Background technique
Photoswitch be used to cut between an input optical fibre and one or more output optical fibre in optical system
Change light beam.For example, photoswitch be used to be connected and disconnected from transmission channel in light communication system to route by the light of modulates information
Beam provides network protection, provides interconnection, and point slotting application.Photoswitch can be used for that light source is made to generate pulse, such as laser
Device, or other function is realized using modulation or unmodulated light beam.
Photoswitch is realized there are many mode, is generally comprised mechanically, micro-electronic mechanical system technique (MEMS), electro-optical,
Thermo-optic type, Mach Zehnder interference technique and magneto-optic formula etc..Wherein, magneto-optic shutter is using faraday's magnetic rotation effect come real
The switching of existing optical path due to no any moving component, thus has superior reliability and switching speed response.
Magneto-optic shutter can be divided into transmission-type and two kinds reflective from light channel structure.Reflection-type magneto-optic volume of switch is small, at
This is low；And since light beam passes through birefringece crystal and Farady rotator back and forth, higher channel separation can also be obtained
Degree, thus application is more extensive.
Utility model content
The utility model relates to a kind of reflection-type magneto-optic switch, the reflection-type magneto-optic switch includes: input collimater,
Female light beam is inputted the reflection-type magneto-optic and switched by the input collimater；First output collimater and second output terminal are quasi-
Light beam is exported the reflection-type magneto-optic and switched by straight device, first output collimater and second output terminal collimator,；Rib
Mirror, the prism can make light beam that deviation occur；The optical axis of first birefringece crystal, first birefringece crystal is located at level
Face, first birefringece crystal are made of birefringent material, when female light beam is injected described first by the input collimater
When birefringece crystal, it is orthogonal beamlet that female light beam is separated into two beam polarization states by first birefringece crystal；The
Half of wave plate pair, first half-wave plate are inclined to that the two beam polarization states passed through from left to right can be become two beams for orthogonal light beam
The identical light beam of polarization state；The combination of Farady rotator and magnetic element, the magnetic element is controllable magnetic element, described
Magnetic element can apply saturation magnetic field on the Farady rotator or not apply magnetic field, the Farady rotator
It can make to input the Faraday when not being applied magnetic field with the Farady rotator after being applied saturation magnetic field
The light beam of crystal becomes different polarization states；The optical axis of second birefringece crystal, second birefringece crystal is located at horizontal plane,
Second birefringece crystal is made of birefringent material, and second birefringece crystal can make light beam deviation occur or without deviation
Directly pass through；Second half-wave plate pair, second half-wave plate is to can have identical polarization state for two beams that pass through from left to right
It is orthogonal light beam that light beam, which becomes two beam polarization states, and second half-wave plate to can be by the two beam polarization states passed through from right to left
Orthogonal light beam becomes the identical light beam of two beam polarization states；Light beam can be reflected to change by right-angle prism, the right-angle prism
The direction of darkening beam.
The optical element of reflection-type magneto-optic switch is set gradually from left to right are as follows: the input collimater, described
The combination of first output collimater, the second output terminal collimator, the prism, first birefringece crystal are described
First half-wave plate pair, the combination of the Farady rotator and magnetic element, second birefringece crystal, described the second half
Wave plate pair, the right-angle prism.
Preferably, first birefringece crystal is calcite.
Preferably, when the Farady rotator applies saturation magnetic field by the magnetic element, pass through the faraday
The polarization state of the light beam of gyrotropi crystal rotates 45 degree counterclockwise.
Preferably, it when the Farady rotator does not apply magnetic field by the magnetic element, is revolved by the faraday
The polarization state of the light beam of luminescent crystal rotates clockwise 45 degree.
Preferably, the optical element that the light beam of the input collimater input passes through is successively are as follows: described first is birefringent
Crystal, first half-wave plate pair, the combination of the Farady rotator and magnetic element, second birefringece crystal,
Second half-wave plate pair, the right-angle prism, second half-wave plate pair, second birefringece crystal, the faraday
The combination of gyrotropi crystal and magnetic element, first half-wave plate pair, first birefringece crystal, the prism, then from
First output collimater projects.
Preferably, the optical element that the light beam of the input collimater input passes through is successively are as follows: described first is birefringent
Crystal, first half-wave plate pair, the combination of the Farady rotator and magnetic element, second birefringece crystal,
Second half-wave plate pair, the right-angle prism, second half-wave plate pair, second birefringece crystal, the faraday
The combination of gyrotropi crystal and magnetic element, first half-wave plate pair, first birefringece crystal, the prism, then from
The second output terminal collimator projects.
Detailed description of the invention
Fig. 1 a is the structural schematic diagram of magneto-optic shutter, and light beam is injected from input collimater at this time, from the first output end standard
Straight device projects；Fig. 1 b is the structural schematic diagram of magneto-optic shutter, and light beam is injected from input collimater at this time, from second output terminal standard
Straight device projects；
Fig. 2 is light beam by the polarization state variation diagram after each optical component of magneto-optic shutter, and light beam is from input terminal at this time
Collimator is injected, and is projected from the first output collimater；
Fig. 3 is light beam by the polarization state variation diagram after each optical component of magneto-optic shutter, and light beam is from input terminal at this time
Collimator is injected, and is projected from second output terminal collimator.
Specific embodiment
Embodiment one
A reflection-type magneto-optic switch is present embodiments provided, which does not include movable part, the light having had
Performance and high switch speed are learned, and can be realized with a small size.Fig. 1 a shows the optical component of magneto-optic shutter
Arrangement.Magneto-optic shutter includes three single optical fiber calibrators: input collimater 110, the first output collimater 109 and second are defeated
Outlet collimator 111；One prism 101, it is preferable that prism 101 is rhombic prism；Two birefringece crystals: first is birefringent
Crystal 102 and the second birefringece crystal 106；Two half-wave plates pair: the first half-wave plate to 103 and second half-wave plate to 107；One
Farady rotator 105；One group of magnetic element 104 and a right-angle prism 108.Input collimater 110 is to be loaded with input
The input collimater of light beam, the first output collimater 109 and second output terminal collimator 111 are be loaded with output beam defeated
Outlet collimator.It is received by the first output collimater 109 or second output terminal collimator 111 and comes from input collimater
110 light beam realizes the function of magneto-optic shutter in the present embodiment.
Prism 101 is arranged on the first output collimater 109, input collimater 110, second output terminal collimator
111 right sides, prism 101 mainly receive output beam and change its direction, and light beam is incident on after deviation occurs in prism 101
In first output collimater 109 or second output terminal collimator 111.
First birefringece crystal 102 is arranged on the right side of prism 101, and the optical axis of the first birefringece crystal 102 is located at water
Plane.First birefringece crystal 102 is made of birefringent material, when input collimater 110 input female light beam from left to right
By when, female light beam is separated into the orthogonal polariton beam of two beams by the first birefringece crystal 102: one with refractive index no
Ordinary light beamlet and an extraordinary ray beamlet with refractive index ne.Certainly, two beams separated obtained are orthogonal
Polariton beam or same light beam can be merged into original female light beam after passing through from right to left.Preferably, first pair
Refracting crystal 102 is calcite, and such selection can obtain in cost and difficulty of processing preferable in volume industrial production
Balance.
The right side that first half-wave plate is arranged on the first birefringece crystal 102 to 103.First half-wave plate to 103 optical axis
To determine direction, two beams refraction photon light beam, which has, after female light beam passes through the first birefringece crystal 102 from left to right mutually hangs down
Straight polarization state, the photon light beam of two beams refraction later again from left to right by have determine first half-wave plate in direction to after 103,
First half-wave plate makes this two beams beamlet polarization state having the same to 103；When the beamlet of two beams polarization state having the same
From right to left by having the first half-wave plate for determining direction to after 103, the first half-wave plate has this two beams beamlet to 103
Orthogonal polarization state.
The combination of Farady rotator 105 and magnetic element 104 is arranged on the first half-wave plate to 103 right side.Method
Draw gyrotropi crystal 105 that light polarization direction can be made to rotate, Beam rotation amount is the function of 105 thickness of Farady rotator.
Usual Farady rotator is thicker, and the rotation being applied on light beam is bigger.Wherein magnetic element 104 is controllable magnetic element,
Farady rotator 105 can be applied and add saturation magnetic field or the additional saturation magnetic field is made to disappear.
Second birefringece crystal 106 is arranged on the right side of Farady rotator 105, receives brilliant from Faraday
The light beam of body 105 makes light beam that deviation or directly passing through without deviation occur.The optical axis of second birefringece crystal 106 is perpendicular to water
Plane.In the present embodiment, such as Fig. 1 a, when magnetic element 104 applies magnetic field, light beam from left to right can be directly logical without deviation
It crosses, deviation can occur for light beam from right to left；Such as Fig. 1 b, when magnetic element 104 does not apply magnetic field, light beam from left to right can be sent out
Raw deviation, light beam from right to left can directly pass through without deviation.
The right side that second half-wave plate is arranged on the second birefringece crystal 106 to 107.Equally, the second half-wave plate is to 107
Optical axis is to determine direction, when the beamlet of two beams polarization state having the same is from left to right by having determine direction the second half
For wave plate to after 107, the second half-wave plate makes this two beams beamlet have orthogonal polarization state to 107；When two beams have mutually
The beamlet of vertical polarization state from right to left by have determine second half-wave plate in direction to after 107, the second half-wave plate pair
107 make this two beams beamlet polarization state having the same
Right-angle prism 108 is arranged on the second half-wave plate to 107 right side.By the second half-wave plate to 107 light beam quilt
Right-angle prism 108 reflects.Right-angle prism 108 is arranged on properly relative to the second birefringece crystal 106 and entire magneto-optic shutter
Position so that light beam can be reflected back toward the second birefringece crystal 106 and the first output collimater 109 or the second output
Hold collimator 111.
The optical element of magneto-optic shutter is set gradually from left to right are as follows: input collimater 110, the first output collimater
109, the combination of second output terminal collimator 111, prism 101, the first birefringece crystal 102, the first half-wave plate is to 103, farad
The combination of gyrotropi crystal 105 and magnetic element 104, the second birefringece crystal 106, the second half-wave plate is to 107, right-angle prism
108。
The combination of Farady rotator 105 and magnetic element 104 by magnetic element 104 whether apply saturation magnetic field come
Change light beam to project from the first output collimater 109 or second output terminal collimator 111, to realize the function of magneto-optic shutter
Energy.It is described in more detail below its principle.
Fig. 1 a and Fig. 2 describe magneto-optic shutter and light beam are input to the first output collimater from input collimater 100
The applicable cases of 109 outputs.Fig. 1 a illustrates the component of magneto-optic shutter and the light beam by these components, Fig. 2 are illustrated
The polarization state of light beam after each component that light beam passes through magneto-optic shutter.
The light beam 112 projected from input collimater 110 is incident on the first birefringece crystal 102, the first birefringece crystal
102 optical axis is located at horizontal plane (i.e. in paper), the female light beam 112 projected by input terminal 110 can be decomposed into polarization direction
Two orthogonal and spatially separated parallel beamlets.The polarization direction of first beamlet 113 (e light) is parallel to optical axis institute
Plane (paper), the polarization direction of the second beamlet 114 (o light) is perpendicular to optical axis.Wherein the second beamlet 114 does not occur
Deviation passes through the first birefringece crystal 102, and the first beamlet 113 then generates a sidesway.First beamlet 113 and second later
Beamlet 114 makes the first beamlet 113 and the second beamlet 114 to 103 to 103, first half-wave plates by the first half-wave plate
Polarization state direction is identical.Identical beamlet the first beamlet 113 of following two beams polarization state and the second beamlet 114 are incident on
Farady rotator 105, at this time Farady rotator 105 outside magnetic element 104 plus saturation magnetic field under, the first sub-light
The polarization state of beam 113 and the second beamlet 114 is relative to first beamlet 113 and the second sub-light in the first half-wave plate is to 103
The polarization state of beam 114 has rotated 45 degree counterclockwise by Faraday rotator 105.Two the first beamlets of beam beamlet, 113 He at this time
The polarization state of second beamlet 114 is identical, and (optical axis of the second birefringece crystal 106 hangs down relative to the second birefringece crystal 106
Directly in horizontal plane) be o light (polarization direction is perpendicular to optical axis), two light beams do not occur deviation by the second birefringece crystal
106.Then two beam beamlet the first beamlets 113 and the second beamlet 114 by the second half-wave plate to after 107, the first sub-light
The polarization state of beam 113 and the second beamlet 114 is orthogonal, is finally incident on right-angle prism 108 and is totally reflected.First beamlet
Position exchanges after being reflected with the second beamlet, and again by the second half-wave plate to 107, at this time two beam beamlets first
Beamlet 113 is identical with the polarization state of the second beamlet 114, and is e light (polarization for the second birefringece crystal 106
The plane being oriented parallel to where optical axis), the two-fold by second of deviation occurs for the first beamlet 113 and the second beamlet 114
Crystal 106 is penetrated, deflects into the first beamlet 113 and the second beamlet 114 from the extended line for being located at input collimater 110
On the extended line of the first output collimater 109.Then again by Farady rotator 105, since faraday is revolved
The polarization state of the irreversibility of luminescent crystal 105, the first beamlet 113 and the second beamlet 114 continues to be rotated counterclockwise 45 degree.
Then by the first half-wave plate to after 103, the polarization state of the first beamlet 113 and the second beamlet 114 is orthogonal, is incident on
First birefringece crystal 102 synthesizes single beam, after transferring by prism 101, is incident on the first output collimator 109, finally quilt
Guidance output.
Fig. 1 b and Fig. 3 describe magneto-optic shutter and light beam are input to second output terminal collimator from input collimater 110
The applicable cases of 111 outputs.
The female light beam 112 projected from input collimater 110 is incident on the first birefringece crystal 102, the first birefringent crystalline substance
The optical axis of body 102 is located at horizontal plane (i.e. in paper), the female light beam 112 projected by input collimater 110 can be decomposed into
Two orthogonal and spatially separated parallel beamlets of polarization direction.The polarization direction of first beamlet 113 (e light) is parallel
In the plane (paper) where optical axis, the polarization direction of the second beamlet 114 (o light) is perpendicular to optical axis.Wherein the second beamlet
114 do not occur deviation by the first birefringece crystal 102, the first beamlet 113 then generates a sidesway.First beamlet later
113 and second beamlet 114 first beamlet 113 and the second son made to 103 to 103, first half-wave plates by the first half-wave plate
The polarization state direction of light beam 114 is identical.Identical beamlet the first beamlet 113 of following two beams polarization state and the second beamlet
114 are incident on Farady rotator 105, and 105 externally-applied magnetic field of Farady rotator disappears at this time, 113 He of the first beamlet
The polarization state of second beamlet 114 is relative to first beamlet 113 in the first half-wave plate is to 103 and the second beamlet 114
Polarization state has rotated clockwise 45 degree by Faraday rotator 105.Two the first beamlets of beam beamlet 113 and the second son at this time
The polarization state of light beam 114 is identical, and (optical axis of the second birefringece crystal 106 is perpendicular to water relative to the second birefringece crystal 106
Plane) it is o light (polarization direction is parallel to paper), two light beams generation deviation passes through the second birefringece crystal 106, makes first
Beamlet 113 and the second beamlet 114 are deflected into from the extended line for being located at input collimater 110 positioned at second output terminal standard
On the extended line of straight device 111.Then two light beams by the second half-wave plate to after 107, the first beamlet 113 and the second beamlet
114 polarization state is orthogonal, is finally incident on right-angle prism 108 and is totally reflected, the first beamlet 113 and the second beamlet
After 114 are reflected, position is exchanged, again by the second half-wave plate to 107, the first beamlet 113 and the second sub-light at this time
114 polarization state of beam is identical, and is o light for the second birefringece crystal 106, and deviation does not occur passes through the second birefringent crystalline substance
Body 106.Then again by Farady rotator 105, due to the irreversibility of Farady rotator, the polarization of two light beams
State continuation is rotated clockwise 45 degree.Then by the first half-wave plate to after 103, the polarization state of two light beams is orthogonal, incident
Single beam is synthesized to the first birefringece crystal 102, after transferring by prism 101, is incident on second output terminal collimator 111, most
After be guided to export.
In the present embodiment, due to the presence of faraday's crystal, magneto-optic shutter is irreversible.
The utility model is illustrated above by specific embodiment, but the utility model is not limited only to this, also
Cover the various modifications that thought according to the present utility model is done in the range of the technical solution of the utility model.Above by
The utility model is illustrated in specific embodiment, but the utility model is not limited only to this, also covers practical new according to this
The various modifications that the thought of type is done in the range of the technical solution of the utility model.
Claims (6)
1. a kind of reflection-type magneto-optic switch, the reflection-type magneto-optic switch includes:
Female light beam is inputted the reflection-type magneto-optic and switched by input collimater, the input collimater；
First output collimater and second output terminal collimator, first output collimater and second output terminal collimator
Light beam is exported into the reflection-type magneto-optic switch；
Prism, the prism can make light beam that deviation occur；
First birefringece crystal, the optical axis of first birefringece crystal are located at horizontal plane, and first birefringece crystal is by double
Refractive material is constituted, and when female light beam is injected first birefringece crystal by the input collimater, described first is two-fold
Penetrating crystal and female light beam is separated into two beam polarization states is orthogonal beamlet；
First half-wave plate pair, first half-wave plate to can by the two beam polarization states passed through from left to right be orthogonal light beam become
The identical light beam of two beam polarization states；
The combination of Farady rotator and magnetic element, the magnetic element are controllable magnetic element, and the magnetic element can
To apply saturation magnetic field on the Farady rotator or not apply magnetic field, the Farady rotator be applied it is full
With can make the light beam for inputting the Farady rotator behind magnetic field when not being applied magnetic field with the Farady rotator
Become different polarization states；
Second birefringece crystal, the optical axis of second birefringece crystal are located at horizontal plane, and second birefringece crystal is by double
Refractive material is constituted, and second birefringece crystal can make light beam that deviation occur or directly pass through without deviation；
Second half-wave plate pair, light beam change of second half-wave plate to two beams passed through from left to right can be had to identical polarization state
Be orthogonal light beam for two beam polarization states, second half-wave plate to can by the two beam polarization states passed through from right to left be it is orthogonal
Light beam becomes the identical light beam of two beam polarization states；
Right-angle prism, the right-angle prism can reflect light beam to change the direction of light beam；
It is characterized in that, the optical element of the reflection-type magneto-optic switch is set gradually from left to right are as follows: the input terminal collimation
The combination of device, first output collimater, the second output terminal collimator, the prism, the first birefringent crystalline substance
Body, first half-wave plate pair, the combination of the Farady rotator and magnetic element, second birefringece crystal, institute
State the second half-wave plate pair, the right-angle prism.
2. reflection-type magneto-optic switch as described in claim 1, which is characterized in that first birefringece crystal is side's solution
Stone.
3. reflection-type magneto-optic switch as described in claim 1, which is characterized in that the Farady rotator is by the magnetic
Property element apply saturation magnetic field when, rotate 45 degree counterclockwise by the polarization state of the light beam of the Farady rotator.
4. reflection-type magneto-optic switch as described in claim 1, which is characterized in that the Farady rotator is not described
When magnetic element applies magnetic field, 45 degree are rotated clockwise by the polarization state of the light beam of the Farady rotator.
5. reflection-type magneto-optic switch as described in claim 1, which is characterized in that the light beam of the input collimater input
The optical element of process is successively are as follows: first birefringece crystal, first half-wave plate pair, the Farady rotator and
The combination of magnetic element, second birefringece crystal, second half-wave plate pair, the right-angle prism, second half-wave
Piece pair, second birefringece crystal, the combination of the Farady rotator and magnetic element, first half-wave plate pair,
Then first birefringece crystal, the prism are projected from first output collimater.
6. reflection-type magneto-optic switch as described in claim 1, which is characterized in that the light beam of the input collimater input
The optical element of process is successively are as follows: first birefringece crystal, first half-wave plate pair, the Farady rotator and
The combination of magnetic element, second birefringece crystal, second half-wave plate pair, the right-angle prism, second half-wave
Piece pair, second birefringece crystal, the combination of the Farady rotator and magnetic element, first half-wave plate pair,
Then first birefringece crystal, the prism are projected from the second output terminal collimator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821301718.4U CN208432822U (en) | 2018-08-10 | 2018-08-10 | Reflection-type magneto-optic switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821301718.4U CN208432822U (en) | 2018-08-10 | 2018-08-10 | Reflection-type magneto-optic switch |
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| CN208432822U true CN208432822U (en) | 2019-01-25 |
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| CN201821301718.4U Active CN208432822U (en) | 2018-08-10 | 2018-08-10 | Reflection-type magneto-optic switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111347158A (en) * | 2020-03-20 | 2020-06-30 | 华中科技大学 | Compound welding set of semiconductor blue light laser and fiber laser |
-
2018
- 2018-08-10 CN CN201821301718.4U patent/CN208432822U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111347158A (en) * | 2020-03-20 | 2020-06-30 | 华中科技大学 | Compound welding set of semiconductor blue light laser and fiber laser |
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