CN113885231B - Optical Isolator - Google Patents
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- CN113885231B CN113885231B CN202111072589.2A CN202111072589A CN113885231B CN 113885231 B CN113885231 B CN 113885231B CN 202111072589 A CN202111072589 A CN 202111072589A CN 113885231 B CN113885231 B CN 113885231B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/09—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect
- G02F1/093—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on magneto-optical elements, e.g. exhibiting Faraday effect used as non-reciprocal devices, e.g. optical isolators, circulators
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Abstract
本发明提供一种光隔离器，包括第一输入组件、第二输入组件、第一输出组件、第二输出组件、磁致旋光晶体、第一光路调整PBS棱镜、第二光路调整PBS棱镜和旋光半波片，通过输入/输出PBS棱镜对光纤进行偏振分合光，并通过第一/第二光路调整PBS棱镜将光路调整，继而是光线汇聚在第一光路从磁致旋光晶体穿过并实现相应的旋光，使得不同端口输入的光线均从该磁致旋光晶体穿过，在从对应的不同端口输出，从而大大提高磁致旋光晶体的利用效率，磁致旋光晶体由于只需要沿第一光路布置即可，继而磁致旋光晶体可制作的相对较小，不需要全面积覆盖，因而可大大降低成本，也有利于提高晶体消光比ER的均匀性。
The present invention provides an optical isolator, comprising a first input component, a second input component, a first output component, a second output component, a magneto-optical rotation crystal, a first optical path adjustment PBS prism, a second optical path adjustment PBS prism and an optical rotation half-wave plate. The input/output PBS prism is used to perform polarization separation and combination of optical fibers, and the optical path is adjusted by the first/second optical path adjustment PBS prism. Then, the light is converged on the first optical path and passes through the magneto-optical rotation crystal and realizes corresponding optical rotation. Thus, the light input from different ports passes through the magneto-optical rotation crystal and is output from corresponding different ports, thereby greatly improving the utilization efficiency of the magneto-optical rotation crystal. Since the magneto-optical rotation crystal only needs to be arranged along the first optical path, the magneto-optical rotation crystal can be made relatively small and does not need to cover the entire area, thereby greatly reducing the cost and facilitating improving the uniformity of the crystal extinction ratio ER.
Description
Technical Field
The invention relates to the field of optical devices, in particular to an optical isolator.
Background
In high power laser systems, an optical isolator is often added to allow light to pass only in one direction in order to prevent the return light from affecting the stable operation of the laser and even damaging components within the laser. An optical isolator is a directional passive device that allows light to pass in one direction and prevents light from passing in the opposite direction, and is used in the fields of optical communication, optical measurement, and the like. If the returned light energy in the fiber laser system is strong, the performance of the whole system may be drastically reduced, and even the whole system may be burned out. The optical isolator is a directional passive device which allows light to pass in one direction and prevents light from passing in the opposite direction, and can be used in the fields of optical communication, optical measurement and the like, so that an optical isolation device is needed to be added in an optical path, and the part of returned light is filtered out as much as possible, so that the influence of the returned light on a laser system is avoided, and the stability of system output is improved.
The existing optical isolator mainly comprises a transmission type single-stage isolator, a transmission type multi-stage isolator, a reflection type single-stage isolator and a reflection type multi-stage isolator, wherein one key device in the isolator is a magneto-optical rotation element, a core component of the optical isolator is a Faraday rotation crystal (TGG crystal), the TGG crystal is an optical isolator which occupies the most important cost, the conventional optical fiber isolator uses a circular TGG crystal, two polarization beams pass through the same TGG crystal, so that the transmission of light beams is met by the TGG crystal with a large aperture, and in general, the polarization beam is passed through the TGG crystal, the use proportion of the light aperture of the TGG crystal is less than or equal to 10 percent, and the visible use ratio is very low.
In addition, with the increase of the clear aperture of the TGG crystal, the purchase price is almost increased by square, and meanwhile, the requirement of the TGG crystal with the increased diameter on the manufacturing process is larger, particularly the uniformity of the material of the TGG crystal, so that the uniformity of the extinction ratio ER of the TGG crystal is generally influenced, the uniformity of the polarization rotation angle is also influenced, and the forward loss and the reverse isolation are influenced due to the inconsistent rotation angles. In addition, the port expansion of the optical isolator is limited to a certain extent by the cost limitation and the process limitation of the Faraday rotator crystal.
Disclosure of Invention
The invention aims to provide an optical isolator for improving the utilization efficiency of a magnetoelectric crystal.
In order to achieve the purpose of the invention, the invention provides an optical isolator, which comprises a first input component, a second input component, a first output component, a second output component, a magnetoelectric optical crystal, a first light path adjusting PBS prism, a second light path adjusting PBS prism and an optical rotation half wave plate, wherein the first input component comprises a first input port group, a first input PBS prism and a first input half wave plate which are sequentially arranged, the first input PBS prism is provided with two first input medium films which are mutually parallel, the two first input medium films are distributed along a first splitting and combining direction, the first input port group comprises a first input collimator, the first input collimator faces one of the first input medium films, the second input component comprises a second input port group, a second input PBS prism and a second input half wave plate which are sequentially arranged, the second input prism is provided with two second input medium films which are mutually parallel, the two second input medium films are distributed along the first splitting and combining direction, and the second input port group comprises a second input collimator faces one of the second input medium films; the first output component comprises a first output port group, a first output PBS prism and a first output half-wave plate which are sequentially arranged, the first output PBS prism is provided with two first output dielectric films which are parallel to each other, the two first output dielectric films are distributed along a first splitting and combining direction, the first output port group comprises a first output collimator, the first output collimator faces one of the first output dielectric films, the second output component comprises a second output port group, a second output PBS prism and a second output half-wave plate which are sequentially arranged, the second output PBS prism is provided with two second output dielectric films which are parallel to each other, the two second output dielectric films are distributed along the first splitting and combining direction, the second output port group comprises a second output collimator, a magnet is arranged on the periphery of the second output collimator towards one of the second output dielectric films, a first optical path adjusting PBS prism is provided with a first adjusting dielectric film and a second adjusting dielectric film which are parallel to each other, the first adjusting dielectric film and the second adjusting dielectric film are distributed along a second splitting direction, the second optical path adjusting PBS prism is provided with a third adjusting dielectric film and a fourth adjusting dielectric film which are parallel to each other, the third adjusting dielectric film and the fourth adjusting dielectric film are distributed along a second splitting direction, the second input PBS prism, the second input half-wave plate, the second adjusting dielectric film, the magneto-optical crystal, the optical rotation half-wave plate, the fourth adjusting dielectric film, the second output half-wave plate and the second output PBS prism are sequentially arranged along the first optical path direction, the first input half-wave plate and the first adjusting dielectric film are sequentially arranged along the second optical path direction, the third adjusting dielectric film, the first output half-wave plate and the first output PBS prism are sequentially arranged along a third optical path direction, the first optical path, the second optical path and the third optical path are sequentially arranged along the third splitting direction, the first optical path, the second half-wave plate and the first output medium film are sequentially perpendicular to the second optical path adjusting dielectric film and the second optical path and the second optical splitting direction are sequentially arranged along the second splitting direction, and the second optical path adjusting dielectric film and the first output half-wave medium is perpendicular to the second optical path and the second adjusting medium film.
According to the scheme, the optical fiber is subjected to polarization splitting and light combination through the input/output PBS prism, the optical path is adjusted through the first/second optical path adjusting PBS prism, then the light is converged on the first optical path and passes through the magnetoelectric crystal, and corresponding optical rotation is realized, so that the light input by different ports passes through the magnetoelectric crystal and is output from corresponding different ports, the utilization efficiency of the magnetoelectric crystal is greatly improved, the magnetoelectric crystal only needs to be arranged along the first optical path, and then the magnetoelectric crystal can be manufactured relatively smaller without full-area coverage, so that the cost can be greatly reduced, and the uniformity of the crystal extinction ratio ER is also facilitated to be improved.
In a further aspect, the first input port group includes a plurality of first input collimators distributed along the second splitting direction, and the plurality of first input collimators all face the same first input dielectric film.
Still further, the first input port group includes a first diaphragm disposed between the first input collimator and the first input PBS prism.
In a further aspect, the second input port group includes a plurality of second input collimators distributed along a second splitting direction, where the plurality of second input collimators all face the same second input dielectric film.
Still further, the second input port group includes a second diaphragm disposed between the second input collimator and the second input PBS prism.
In a further aspect, the first output port group includes a plurality of first output collimators distributed along the second splitting direction, where the plurality of first output collimators all face the same first output dielectric film.
Still further, the first output port group includes a third diaphragm disposed between the first output collimator and the first output PBS prism.
In a further aspect, the second output port group includes a plurality of second output collimators distributed along a second splitting direction, where the plurality of second output collimators all face the same second output dielectric film.
Still further, the second output port group includes a fourth diaphragm disposed between the second output collimator and the second output PBS prism.
From the above, since the first/second optical path adjusting PBS prisms can collect and separate the optical paths, then the input collimators or the output collimators in the first input component, the second input component, the first output component and the second output component can be expanded according to actual requirements, and the multi-port expansion application is realized by means of the transmission or reflection of the adjusting dielectric film.
Still further, the second conditioning dielectric film is perpendicular to the fourth conditioning dielectric film.
From the above, the second adjusting dielectric film is perpendicular to the fourth adjusting dielectric film, so that the input port and the output port of the isolator are symmetrically arranged, and the encapsulation and the port connection of the isolator shell are facilitated.
Drawings
Fig. 1 is a top view block diagram of a first embodiment of an optical isolator of the present invention.
Fig. 2 is a side view block diagram of a first input assembly in a first embodiment of an optical isolator in accordance with the present invention.
Fig. 3 is a side view block diagram of a second output assembly of a first embodiment of an optical isolator in accordance with the present invention.
Fig. 4 is a side view block diagram of a second input assembly of a first embodiment of an optical isolator in accordance with the present invention.
Fig. 5 is a side view block diagram of a first output assembly of a first embodiment of an optical isolator in accordance with the present invention.
Fig. 6 is a first optical path transmission state diagram of a first embodiment of the optical isolator of the present invention.
Fig. 7 is a second optical path transmission state diagram of the first embodiment of the optical isolator of the present invention.
Fig. 8 is a top view block diagram of a second embodiment of an optical isolator according to the present invention.
The invention is further described below with reference to the drawings and examples.
Detailed Description
Optical isolator first embodiment:
referring to fig. 1, fig. 1 is a top view of an optical isolator including a first input assembly, a second input assembly, a first output assembly, a second output assembly, a magnetoelectric crystal 16, a magnet 17, a first light path adjustment PBS prism 31, a second light path adjustment PBS prism 32, and an optically active half wave plate 185.
Referring to fig. 2, fig. 2 is a side view block diagram of a first input assembly including a first input port group, a first input PBS prism 21, and a first input half wave plate 181 arranged in this order, the first input PBS prism 21 being provided with two first input dielectric films 211 parallel to each other, the two first input dielectric films 211 being distributed along a first splitting and combining direction Z, the first input port group including a first input collimator 11 and a first diaphragm 151, the first input collimator 11 facing one of the first input dielectric films 211 located at a lower side, the first diaphragm 151 being disposed between the first input collimator 11 and the first input dielectric film 211 of the first input PBS prism 21.
Referring to fig. 3, fig. 3 is a side view block diagram of a second output assembly including a second output port group, a second output PBS prism 24, and a second output half wave plate 184 arranged in this order, the second output PBS prism 24 being provided with two second output dielectric films 241 parallel to each other, the two second output dielectric films 241 being distributed along a first splitting and combining direction Z, the second output port group including a second output collimator 14 and a fourth diaphragm 154, the second output collimator 14 facing one second output dielectric film 241 located on an upper side, the fourth diaphragm 154 being disposed between the second output collimator 14 and the second output dielectric film 241 of the second output PBS prism 24.
Referring to fig. 4, fig. 4 is a side view block diagram of a second input assembly including a second input port group, a second input PBS prism 22, and a second input half wave plate 182 arranged in this order, the second input PBS prism 22 being provided with two second input dielectric films 221 parallel to each other, the two second input dielectric films 221 being distributed along a first splitting and combining direction Z, the second input port group including a second input collimator 12 and a second diaphragm 152, the second input collimator 12 facing one second input dielectric film 221 located at a lower side, the second diaphragm 152 being disposed between the second input collimator 12 and the second input dielectric film 221 of the second input PBS prism 22.
Referring to fig. 5, fig. 5 is a side view block diagram of a first output assembly including a first output port group, a first output PBS prism 23, and a first output half wave plate 183 sequentially arranged, the first output PBS prism 23 being provided with two first output dielectric films 231 parallel to each other, the two first output dielectric films 231 being distributed along a first splitting and combining direction Z, the first output port group including a first output collimator 13 and a third diaphragm 153, the first output collimator 13 facing one first output dielectric film 231 located at an upper side, the third diaphragm 153 being disposed between the first output collimator 13 and a third adjustment dielectric film 321 of the first output PBS prism 23.
The first optical path adjusting PBS prism 31 is located at a side close to the first and second input units, the first optical path adjusting PBS prism 31 is provided with a first adjusting dielectric film 311 and a second adjusting dielectric film 312 which are parallel to each other, the first adjusting dielectric film 311 and the second adjusting dielectric film 312 are distributed along a second splitting direction Y, the second optical path adjusting PBS prism 32 is located at a side close to the first and second output units, the second optical path adjusting PBS prism 32 is provided with a third adjusting dielectric film 321 and a fourth adjusting dielectric film 322 which are parallel to each other, and the third adjusting dielectric film 321 and the fourth adjusting dielectric film 322 are distributed along the second splitting direction Y.
The magnetoelectric crystal 16 and the optical rotation half wave plate 185 are disposed between the first optical path adjustment PBS prism 31 and the second optical path adjustment PBS prism 32, and the magnet 17 is disposed on the outer circumference of the magnetoelectric crystal 16 and provides a magnetic field to the magnetoelectric crystal 16, and the magnetoelectric crystal 16 employs a faraday optical rotation crystal (TGG crystal).
Referring to fig. 1, and in combination with fig. 2 to 5, the second input PBS prism 22, the second input half-wave plate 182, the second adjustment dielectric film 312, the magnetoelectric lens 16, the optical rotation half-wave plate 185, the fourth adjustment dielectric film 322, the second output half-wave plate 184, and the second output PBS prism 24 are sequentially arranged along the first optical path X1 direction, and the second input half-wave plate 182, the magnetoelectric lens 16, the optical rotation half-wave plate 185, and the second output half-wave plate 184 each extend in the first splitting and combining direction Z and have a certain height so that light transmitted or reflected from the two second input dielectric films 221 and the two second output dielectric films 241 can pass through the second input half-wave plate 182, the magnetoelectric lens 16, the optical rotation half-wave plate 185, and the second output half-wave plate 184.
The first input PBS prism 21, the first input half-wave plate 181 and the first adjustment medium film 311 are sequentially arranged along the second optical path X2, and the first input half-wave plate 181 and the first adjustment medium film 311 both extend in the first splitting and combining direction Z and have a certain height, so that light transmitted or reflected by the two first input medium films 211 can pass through the first input half-wave plate 181 and the first adjustment medium film 311. The third adjustment dielectric film 321, the first output half-wave plate 183 and the first output PBS prism 23 are sequentially arranged along the third optical path X3, and the third adjustment dielectric film 321 and the first output half-wave plate 183 extend in the first splitting and combining direction Z and have a certain height, so that light passing through the third adjustment dielectric film 321 and the first output half-wave plate 183 is incident on the first output dielectric film 231 and then transmitted or reflected through the first output dielectric film 231.
The first optical path X1, the second optical path X2 and the third optical path X3 are parallel, the first splitting and combining direction Z is perpendicular to the second splitting and combining direction Y, the second splitting and combining direction Y is perpendicular to the first optical path X1, in actual use, the first optical path X1, the second optical path X2, the third optical path X3 and the second splitting and combining direction Y can be arranged along a horizontal direction, the first splitting and combining direction Z can be arranged along a vertical direction, and the first splitting and combining direction Z is shown as being perpendicular to a paper surface in fig. 1. And the second adjusting dielectric film 312 is perpendicular to the fourth adjusting dielectric film 322, and then the collimators of the first input component, the second input component, the first output component and the second output component can be symmetrically arranged at two sides through the adjustment of the optical path.
The first input dielectric film 211, the second input dielectric film 221, the first output dielectric film 231, the second output dielectric film 241, the first adjustment dielectric film 311, the second adjustment dielectric film 312, the third adjustment dielectric film 321, and the fourth adjustment dielectric film 322 are polarization split dielectric films.
Referring to fig. 6, in conjunction with fig. 2 and fig. 3, fig. 6 shows the polarization states of different devices when light is transmitted in forward and reverse directions, when light is transmitted in forward directions from Port1 to Port4, the light is input from the first input collimator 11, passes through the first diaphragm 151 and then is incident to the first input PBS prism 21, the two polarized light beams are separated along the first splitting direction Z and are respectively transmitted along the second optical path X2 through polarized light splitting, the two polarized light beams are incident to the first adjusting dielectric film 311, after being reflected by the first adjusting dielectric film 311, the two polarized light beams are transmitted along the second splitting direction Y and are incident to the second adjusting dielectric film 312, and then are reflected by the second adjusting dielectric film 312, and then are sequentially incident to the second output PBS prism 24 after passing through the magnetoelectric crystal 16, the optical half-wave plate 185, the fourth adjusting dielectric film 322 and the second output half-wave plate 184, and then are coupled into the second output collimator 14 after passing through the two second output dielectric films 241 of the second output PBS prism 24, so as to realize forward transmission from P1 to P4.
When the return light returns from the second output collimator 14, the return light passes through the polarization beam splitter of the second output PBS prism 24, the fourth adjusting dielectric film 322, the optical rotation half-wave plate 185, the magnetoelectric optical rotation crystal 16, the second adjusting dielectric film 312 and the second input half-wave plate 182 in sequence, and then passes through the light combination of the second input PBS prism 22 and then strikes the second diaphragm 152, so that the return light is prevented from entering the laser system, and the reverse isolation from the P4 port to the P2 port is realized.
Referring to fig. 7, in conjunction with fig. 4 and fig. 5, fig. 7 shows polarization states of different devices when light is transmitted in forward and reverse directions, when light is transmitted in forward directions from Port2 to Port3, the light is input from the second input collimator 12, passes through the second diaphragm 152 and then is input to the second input PBS prism 22, the two polarized light beams are separated along the second splitting direction Z and are respectively transmitted along the first optical path X1 through polarized light splitting, and the two polarized light beams sequentially pass through the second input half-wave plate 182, the second adjusting dielectric film 312, the magnetoelectric crystal 16, the optical rotation half-wave plate 185 and the fourth adjusting dielectric film 322, are respectively reflected by the fourth adjusting dielectric film 322 and the third adjusting dielectric film 321, are then input to the first output PBS prism 23 through the first output half-wave plate 183, are combined through the first output PBS prism 23, and are coupled into the first output collimator 13, so that forward transmission from the ports P2 to P3 is realized.
When the return light returns from the first output collimator 13, the return light passes through the polarization beam splitting of the first output PBS prism 23, the reflection of the third adjusting dielectric film 321 and the fourth adjusting dielectric film 322, the optical rotation half-wave plate 185, the reflection of the magnetoelectric crystal 16, the second adjusting dielectric film 312 and the first adjusting dielectric film 311, and the first input half-wave plate 181 in sequence, and then passes through the light combination of the first input PBS prism 21 and then strikes the first diaphragm 151, so that the return light is prevented from entering the laser system, and the reverse isolation from the P3 port to the P1 port is realized.
Second embodiment of optical isolator:
Referring to fig. 8, fig. 8 is a top view of a second embodiment of an optical isolator, and based on the first embodiment, the number of input collimators or output collimators in the first input port, the second input port set, the first output port and the second output port set may be respectively allocated according to actual port requirements, that is, the first input port set includes a plurality of first input collimators 11 distributed along the second splitting direction Y, and the plurality of first input collimators 11 all face the same first input dielectric film 211. The second input port group includes a plurality of second input collimators 12 distributed along the second splitting direction Y, and the plurality of second input collimators 12 are all oriented toward the same second input dielectric film 221. The first output port group includes a plurality of first output collimators 13 distributed along the second splitting direction Y, and the plurality of first output collimators 13 all face the same first output dielectric film 231. The second output port group includes a plurality of second output collimators 14 distributed along the second splitting direction Y, and the plurality of second output collimators 14 are all oriented toward the same second output dielectric film 241.
Of course, a plurality of different input collimators may be oriented towards different input dielectric films, and a plurality of different output collimators may be oriented towards different output dielectric films, in particular arranged by the arrangement of the optical paths, which may also achieve forward transmission reverse isolation. The diaphragms can be arranged integrally or separately, the integral diaphragm is provided with a plurality of through holes, the through holes correspond to the central axes of the collimators, and the separate diaphragms correspond to the collimators one by one. In addition, the input PBS prism and the output PBS prism can correspond to one collimator except one prism to multiple collimators, and the collection and separation of light paths can be realized only by arranging a plurality of collimators towards the adjusting dielectric film, so that the purpose of sharing the magnetoelectric optical rotation crystal is achieved, the utilization efficiency of the magnetoelectric optical rotation crystal is improved, meanwhile, the magnetoelectric optical rotation crystal can be manufactured relatively smaller without covering the whole area, thereby greatly reducing the cost and being beneficial to improving the uniformity of the extinction ratio ER of the crystal.
Claims (10)
1. An optical isolator, comprising:
The first input assembly comprises a first input port group, a first input PBS prism and a first input half-wave plate which are sequentially arranged, wherein the first input PBS prism is provided with two first input dielectric films which are parallel to each other, the two first input dielectric films are distributed along a first splitting and combining direction, the first input port group comprises a first input collimator, and the first input collimator faces one of the first input dielectric films;
The second input assembly comprises a second input port group, a second input PBS prism and a second input half-wave plate which are sequentially arranged, the second input PBS prism is provided with two second input dielectric films which are parallel to each other, the two second input dielectric films are distributed along the first splitting and combining direction, the second input port group comprises a second input collimator, and the second input collimator faces one of the second input dielectric films;
the first output assembly comprises a first output port group, a first output PBS prism and a first output half-wave plate which are sequentially arranged, wherein the first output PBS prism is provided with two first output dielectric films which are parallel to each other, the two first output dielectric films are distributed along the first splitting and combining direction, the first output port group comprises a first output collimator, and the first output collimator faces one of the first output dielectric films;
The second output assembly comprises a second output port group, a second output PBS prism and a second output half-wave plate which are sequentially arranged, the second output PBS prism is provided with two second output dielectric films which are parallel to each other, the two second output dielectric films are distributed along the first splitting and combining direction, the second output port group comprises a second output collimator, and the second output collimator faces one of the second output dielectric films;
a magnetoelectric crystal, the magnetoelectric crystal being provided with a magnet outside thereof;
the first optical path adjusting PBS prism is provided with a first adjusting dielectric film and a second adjusting dielectric film which are mutually parallel, and the first adjusting dielectric film and the second adjusting dielectric film are distributed along a second splitting and mixing direction;
The second light path adjusting PBS prism is provided with a third adjusting dielectric film and a fourth adjusting dielectric film which are mutually parallel, and the third adjusting dielectric film and the fourth adjusting dielectric film are distributed along the second splitting and mixing direction;
the second input PBS prism, the second input half-wave plate, the second adjusting medium film, the magneto-optical rotation crystal, the optical rotation half-wave plate, the fourth adjusting medium film, the second output half-wave plate and the second output PBS prism are sequentially arranged along the first light path direction;
The first input PBS prism, the first input half-wave plate and the first adjusting medium film are sequentially arranged along a second light path direction, the third adjusting medium film, the first output half-wave plate and the first output PBS prism are sequentially arranged along a third light path direction, the first light path, the second light path and the third light path are parallel, the first splitting and combining direction is perpendicular to the second splitting and combining direction, and the second splitting and combining direction is perpendicular to the first light path;
The first input dielectric film, the second input dielectric film, the first output dielectric film, the second output dielectric film, the first adjustment dielectric film, the second adjustment dielectric film, the third adjustment dielectric film and the fourth adjustment dielectric film are all polarization beam splitting dielectric films.
2. The optical isolator of claim 1, wherein:
The first input port group comprises a plurality of first input collimators distributed along the second splitting direction, and the first input collimators face the same first input dielectric film.
3. The optical isolator of claim 1, wherein:
The first input port group includes a first diaphragm disposed between the first input collimator and the first input PBS prism.
4. The optical isolator of claim 1, wherein:
The second input port group comprises a plurality of second input collimators distributed along the second splitting direction, and the second input collimators face the same second input dielectric film.
5. The optical isolator of claim 1, wherein:
The second input port group includes a second diaphragm disposed between the second input collimator and the second input PBS prism.
6. The optical isolator of claim 1, wherein:
The first output port group comprises a plurality of first output collimators distributed along the second splitting and combining direction, and the first output collimators face the same first output dielectric film.
7. The optical isolator of claim 1, wherein:
The first output port group includes a third aperture disposed between the first output collimator and the first output PBS prism.
8. The optical isolator of claim 1, wherein:
The second output port group comprises a plurality of second output collimators distributed along the second splitting and combining direction, and the second output collimators face the same second output dielectric film.
9. The optical isolator of claim 1, wherein:
The second output port group includes a fourth diaphragm disposed between the second output collimator and the second output PBS prism.
10. An optical isolator as claimed in any one of claims 1 to 9, wherein:
The second conditioning dielectric film is perpendicular to the fourth conditioning dielectric film.
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| CN202111072589.2A CN113885231B (en) | 2021-09-13 | 2021-09-13 | Optical Isolator |
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| CN215678959U (en) * | 2021-09-13 | 2022-01-28 | 珠海光库科技股份有限公司 | Optical isolator |
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| JP2516463B2 (en) * | 1990-08-22 | 1996-07-24 | 並木精密宝石株式会社 | Polarization-independent optical isolator |
| US6587266B2 (en) * | 1999-08-20 | 2003-07-01 | Jds Uniphase Corporation | Bi-directional isolator |
| JP2001154148A (en) * | 1999-11-26 | 2001-06-08 | Tokin Corp | Optical circuit element and method of manufacturing the same |
| JP6860436B2 (en) * | 2017-06-29 | 2021-04-14 | 信越化学工業株式会社 | Optical isolator module |
| CN107908022B (en) * | 2017-12-21 | 2024-05-03 | 珠海光库科技股份有限公司 | Optical fiber isolator and method of use thereof |
| CN110568637B (en) * | 2019-09-04 | 2024-05-03 | 珠海光库科技股份有限公司 | Optical fiber isolator, laser and industrial equipment |
| CN211206998U (en) * | 2019-12-25 | 2020-08-07 | 珠海光库科技股份有限公司 | Reflective polarization-independent online isolator and optical fiber laser |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215678959U (en) * | 2021-09-13 | 2022-01-28 | 珠海光库科技股份有限公司 | Optical isolator |
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