CN113885231A - Optical isolator - Google Patents
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- CN113885231A CN113885231A CN202111072589.2A CN202111072589A CN113885231A CN 113885231 A CN113885231 A CN 113885231A CN 202111072589 A CN202111072589 A CN 202111072589A CN 113885231 A CN113885231 A CN 113885231A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 63
- 239000013078 crystal Substances 0.000 claims abstract description 47
- 230000010287 polarization Effects 0.000 claims abstract description 18
- 230000008033 biological extinction Effects 0.000 abstract description 3
- 239000013307 optical fiber Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 10
- 239000000306 component Substances 0.000 description 6
- 238000002955 isolation Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
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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
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 magneto-optical rotation crystal, a first light path adjusting PBS prism, a second light path adjusting PBS prism and an optical rotation half-wave plate, wherein the input/output PBS prism is used for carrying out polarization splitting and light combination on an optical fiber, the first/second light path adjusting PBS prism is used for adjusting the light path, then the light is converged on the first light path and passes through the magneto-optical rotation crystal to realize corresponding optical rotation, so that the light input by 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, the magneto-optical rotation crystal only needs to be arranged along the first light path, and then the magneto-optical rotation crystal can be manufactured to be relatively small without covering in a full area, thereby greatly reducing the cost, and is also beneficial to improving the uniformity of the extinction ratio ER of the crystal.
Description
Technical Field
The invention relates to the field of optical devices, in particular to an optical isolator.
Background
In a high-power laser system, in order to prevent return light from returning to the system to affect the stable operation of the laser and even destroy components inside the laser, an optical isolator is often added to enable the light to pass through only in one direction. The optical isolator is a directional passive device which allows light to pass in one direction and prevents the light from passing in the opposite direction, and can be 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 can be reduced sharply, and even the whole system is burnt. The optical isolator is a directional passive device which allows light to pass in one direction and prevents the 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 isolator is required to be added in an optical path, and the part of return light is filtered as much as possible, so that the influence of the return light on a laser system is avoided, and the stability of the output of the system 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 a 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 the most important cost of the optical isolator, a circular TGG crystal is used in a conventional optical fiber isolator, two beams of polarized light are transmitted through the same TGG crystal, so that the transmission of light beams is satisfied by the TGG crystal with a large aperture, the polarized light passes through the TGG crystal under a general condition, the use ratio of the light aperture of the TGG crystal is less than or equal to 10%, and the visible utilization rate is very low.
In addition, with the increase of the clear aperture of the TGG crystal, the purchase price is almost increased by square times, and the requirement of the TGG crystal with the increased diameter on the manufacturing process is higher, particularly the material uniformity of the TGG crystal, so the uniformity of the extinction ratio ER of the TGG crystal and the uniformity of the polarization rotation angle are generally influenced, and the forward loss and the reverse isolation degree are influenced by the inconsistent rotation angle. Furthermore, the port expansion of the optical isolator is limited to some extent by the cost limit and the process limit of the faraday rotator.
Disclosure of Invention
The invention aims to provide an optical isolator for improving the utilization efficiency of a magneto-optically active crystal.
In order to achieve the object of the present invention, the present invention provides an optical isolator including a first input module, a second input module, a first output module, a second output module, a magneto-optical crystal, a first light path adjusting PBS prism, a second light path adjusting PBS prism, and an optical half-wave plate, the first input module including a first input port group, a first input PBS prism, and a first input half-wave plate arranged in sequence, the first input PBS prism being provided with two first input dielectric films parallel to each other, the two first input dielectric films being distributed along a first combining direction, the first input port group including a first input collimator facing one of the first input dielectric films, the second input module including a second input port group, a second input PBS prism, and a second input half-wave plate arranged in sequence, the second input PBS prism being provided with two second input dielectric films parallel to each other, the two second input dielectric films are distributed along the first combining direction, the second input port group comprises second input collimators, and the second input collimators face 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, 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 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 combination direction, the second output port group comprises a second output collimator, the second output collimator faces one of the second output dielectric films, and the periphery of the magneto-optical rotation crystal is provided with a magnet; the first light path adjusting PBS prism is provided with a first adjusting dielectric film and a second adjusting dielectric film which are parallel to each other, and the first adjusting dielectric film and the second adjusting dielectric film are distributed along a second combination direction; the second light path adjusting PBS prism is provided with a third adjusting dielectric film and a fourth adjusting dielectric film which are parallel to each other, and the third adjusting dielectric film and the fourth adjusting dielectric film are distributed along a second combination direction; the second input PBS prism, the second input half-wave plate, the second adjusting dielectric film, the magneto-optical rotation 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 light path direction; the first input PBS prism, the first input half-wave plate and the first adjusting dielectric film are sequentially arranged along a second light 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 light path direction, the first light path, the second light path and the third light path are parallel, the first combining direction is vertical to the second combining direction, and the second combining direction is vertical 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 adjusting dielectric film, the second adjusting dielectric film, the third adjusting dielectric film and the fourth adjusting dielectric film are all polarization splitting dielectric films.
The scheme shows that the input/output PBS prism is used for carrying out polarization splitting and combining on the optical fiber, the first/second light path adjusting PBS prism is used for adjusting the light path, then the light is converged on the first light path and passes through the magneto-rotatory crystal to realize corresponding optical rotation, so that the light input by different ports passes through the magneto-rotatory crystal and is output from the corresponding different ports, and the utilization efficiency of the magneto-rotatory crystal is greatly improved.
In a further aspect, the first input port group includes a plurality of first input collimators distributed along the second combining direction, and the plurality of first input collimators face the same first input dielectric film.
Still further, the first set of input ports includes a first aperture disposed between the first input collimator and the first input PBS prism.
In a further aspect, the second input port set includes a plurality of second input collimators distributed along the second combining direction, and the plurality of second input collimators face the same second input dielectric film.
Still further, the second set of input ports includes a second aperture 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, and the plurality of first output collimators face the same first output dielectric film.
Still further, the first set of output ports includes a third aperture disposed between the first output collimator and the first output PBS prism.
In a further aspect, the second output port set includes a plurality of second output collimators distributed along the second combining direction, and the plurality of second output collimators face the same second output dielectric film.
Still further, the second set of output ports includes a fourth aperture disposed between the second output collimator and the second output PBS prism.
As can be seen from the above, since the first/second light path adjusting PBS prism can collect and separate light paths, then the input collimators or the output collimators in the first input assembly, the second input assembly, the first output assembly, and the second output assembly can be expanded according to actual requirements, and then the multi-port expansion application is realized by adjusting the transmission or reflection of the dielectric film.
In a further aspect, the second tuning dielectric film is perpendicular to the fourth tuning dielectric film.
Therefore, the second adjusting dielectric film is perpendicular to the fourth adjusting dielectric film, and then the input port and the output port of the isolator are symmetrically arranged, so that the packaging and 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 of the present invention.
FIG. 3 is a side view block diagram of a second output component of a first embodiment of an opto-isolator according to the present invention.
FIG. 4 is a side view block diagram of a second input assembly in a first embodiment of an optical isolator of the present invention.
FIG. 5 is a side view block diagram of a first output assembly in a first embodiment of an opto-isolator according to 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 of the present invention.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
First embodiment of optical isolator:
referring to fig. 1, fig. 1 is a top view of an optical isolator including a first input element, a second input element, a first output element, a second output element, a magnetorotational crystal 16, a magnet 17, a first path-adjusting PBS prism 31, a second path-adjusting PBS prism 32, and an optically half-wave plate 185.
Referring to fig. 2, fig. 2 is a side view structural diagram of a first input assembly, the first input assembly includes a first input port group, a first input PBS prism 21 and a first input half-wave plate 181, which are sequentially arranged, the first input PBS prism 21 is provided with two first input dielectric films 211 parallel to each other, the two first input dielectric films 211 are distributed along a first splitting direction Z, the first input port group includes a first input collimator 11 and a first diaphragm 151, the first input collimator 11 faces one first input dielectric film 211 located at a lower side, and the first diaphragm 151 is 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 structural diagram of a second output assembly, the second output assembly includes a second output port group, a second output PBS prism 24 and a second output half-wave plate 184, which are sequentially arranged, the second output PBS prism 24 is provided with two second output dielectric films 241 parallel to each other, the two second output dielectric films 241 are distributed along a first splitting direction Z, the second output port group includes a second output collimator 14 and a fourth diaphragm 154, the second output collimator 14 faces one second output dielectric film 241 located on the upper side, and the fourth diaphragm 154 is 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 structural diagram of a second input assembly, the second input assembly includes a second input port group, a second input PBS prism 22 and a second input half-wave plate 182, which are sequentially arranged, the second input PBS prism 22 is provided with two second input dielectric films 221 parallel to each other, the two second input dielectric films 221 are distributed along a first combining direction Z, the second input port group includes a second input collimator 12 and a second diaphragm 152, the second input collimator 12 faces one second input dielectric film 221 located at a lower side, and the second diaphragm 152 is 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 structural diagram of a first output assembly, the first output assembly includes a first output port group, a first output PBS prism 23 and a first output half-wave plate 183, which are sequentially arranged, the first output PBS prism 23 is provided with two first output dielectric films 231 parallel to each other, the two first output dielectric films 231 are distributed along a first splitting direction Z, the first output port group includes a first output collimator 13 and a third diaphragm 153, the first output collimator 13 faces one first output dielectric film 231 located on the upper side, and the third diaphragm 153 is disposed between the first output collimator 13 and a third adjusting dielectric film 321 of the first output PBS prism 23.
The first light path adjusting PBS prism 31 is located at one side close to the first input component and the second input component, the first light 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 the second opening and closing direction Y, the second light path adjusting PBS prism 32 is located at one side close to the first output component and the second output component, the second light 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 opening and closing direction Y.
The magneto-optical crystal 16 and the optically active half-wave plate 185 are disposed between the first optical path adjusting PBS prism 31 and the second optical path adjusting PBS prism 32, and the magnet 17 is disposed on the outer periphery of the magneto-optical crystal 16 and supplies a magnetic field to the magneto-optical crystal 16, the magneto-optical crystal 16 employing a faraday rotation crystal (TGG crystal).
Referring to fig. 1 in combination with fig. 2 to 5, the second input PBS prism 22, the second input half-wave plate 182, the second adjusting dielectric film 312, the magneto-optical crystal 16, the optical half-wave plate 185, the fourth adjusting dielectric film 322, the second output half-wave plate 184, and the second output PBS prism 24 are sequentially disposed along the first light path X1, and the second input half-wave plate 182, the magneto-optical crystal 16, the optical half-wave plate 185, and the second output half-wave plate 184 extend in the first combining direction Z and have a height such 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 magneto-optical crystal 16, the optical 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 adjusting dielectric film 311 are sequentially arranged along the second light path X2, and the first input half-wave plate 181 and the first adjusting dielectric film 311 both extend in the first combining direction Z and have a certain height, so that light transmitted or reflected by the two first input dielectric films 211 can pass through the first input half-wave plate 181 and the first adjusting dielectric film 311. The third adjusting dielectric film 321, the first output half-wave plate 183 and the first output PBS prism 23 are sequentially arranged along the third light path X3, and the third adjusting dielectric film 321 and the first output half-wave plate 183 both extend in the first splitting direction Z and have a certain height, so that light passing through the third adjusting dielectric film 321 and the first output half-wave plate 183 enters the first output dielectric film 231, and is transmitted or reflected by 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 combining direction Z is perpendicular to the second combining direction Y, the second combining direction Y is perpendicular to the first optical path X1, in practical use, the first optical path X1, the second optical path X2, the third optical path X3 and the second combining direction Y can be arranged along a horizontal direction, the first combining direction Z can be arranged along a vertical direction, and the first combining direction Z is shown to be perpendicular to the paper surface in fig. 1. And the second adjusting dielectric film 312 is perpendicular to the fourth adjusting dielectric film 322, so that the collimators of the first input element, the second input element, the first output element and the second output element can be symmetrically arranged on both sides by adjusting the optical path.
In addition, 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 adjusting dielectric film 311, the second adjusting dielectric film 312, the third adjusting dielectric film 321, and the fourth adjusting dielectric film 322 are all polarization splitting dielectric films.
Referring to fig. 6, and with reference to fig. 2 and 3, fig. 6 shows the polarization states of different devices during forward and reverse transmission of light, when light is transmitted from Port1 to Port4, the light is input from the first input collimator 11, passes through the first diaphragm 151 and then enters the first input PBS prism 21, is split by polarization so that two polarization split lights are separated along the first splitting direction Z and transmitted along the second light path X2, respectively, the two polarization split lights enter the first adjusting dielectric film 311, after being reflected by the first adjusting dielectric film 311, the two polarization split lights are transmitted along the second splitting direction Y and enter the second adjusting dielectric film 312, and after being reflected by the second adjusting dielectric film 312, the two polarization split lights sequentially pass through the magneto-optical crystal 16, the optically active half-wave plate 185, the fourth adjusting dielectric film 322, the second output half-wave plate 184 and then enter the second output PBS prism 24, and after passing through the two second output dielectric films 241 of the second output prism 24, is coupled into the output of the second output collimator 14, thereby realizing forward transmission from the P1 to the P4 port.
When returning light returns from the second output collimator 14, the returning light sequentially 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 magneto-optical rotation crystal 16, the second adjusting dielectric film 312, and the second input half-wave plate 182, then passes through the combined light of the second input PBS prism 22, and then is incident on the second diaphragm 152, so that the returning light is prevented from entering the laser system, and reverse isolation from the port P4 to the port P2 is realized.
Referring to fig. 7, in conjunction with fig. 4 and 5, fig. 7 shows the polarization states of different devices when light is transmitted in forward and reverse directions, when the light is transmitted in the forward direction from Port2 to Port3, the light is input from the second input collimator 12, passes through the second diaphragm 152, enters the second input PBS prism 22, is split by polarization splitting so that two polarization split beams are separated along the second splitting direction Z and transmitted along the first light path X1 respectively, the two polarization split beams pass through the second input half-wave plate 182, the second adjusting dielectric film 312, the magneto-optically active crystal 16, the optically active half-wave plate 185 and the fourth adjusting dielectric film 322 in sequence, after being reflected by the fourth adjusting dielectric film 322 and the third adjusting dielectric film 321, respectively, the light is incident to the first output PBS prism 23 through the first output half-wave plate 183, and the combined light passing through the first output PBS prism 23 is coupled to the first output collimator 13 for output, thereby realizing forward transmission from P2 to P3.
When returning light returns from the first output collimator 13, the returning light sequentially 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 reflection of the optical rotation half-wave plate 185, the magneto-optical rotation crystal 16, the second adjusting dielectric film 312 and the first adjusting dielectric film 311, the reflection of the first input half-wave plate 181, the combined light passing through the first input PBS prism 21 and striking the first diaphragm 151, so as to avoid the returning light from entering the laser system, and thus, reverse isolation of the ports from P3 to P1 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 on the basis of the first embodiment, the number of input collimators or output collimators in a first input port, a second input port group, a first output port, and a second output port group can be respectively adjusted according to actual port requirements, that is, the first input port group includes a plurality of first input collimators 11 distributed along a second combining 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 combining direction Y, and the plurality of second input collimators 12 are all facing the same second input dielectric film 221. The first output port group includes a plurality of first output collimators 13 distributed along the second combining direction Y, and the plurality of first output collimators 13 are all facing the same first output dielectric film 231. The second output port group includes a plurality of second output collimators 14 distributed along the second combining direction Y, and the plurality of second output collimators 14 all face the same second output dielectric film 241.
Of course, a plurality of different input collimators may face different input dielectric films and a plurality of different output collimators may face different output dielectric films, specifically arranged by the setting of the light path, which may also achieve forward transmission reverse isolation. The diaphragms can be integrally or separately arranged, the integral diaphragm is provided with a plurality of through holes, the through holes correspond to the central shaft of the collimator, 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 besides a prism to a plurality of collimators, and the collection and the separation of light paths can be realized only by facing the plurality of collimators to the adjusting dielectric film, so that the common magneto-optical rotation crystal is realized, the utilization efficiency of the magneto-optical rotation crystal is improved, meanwhile, the magneto-optical rotation crystal can be manufactured to be relatively small, the full-area coverage is not needed, the cost can be greatly reduced, and the uniformity of the extinction ratio ER of the crystal is also favorably improved.
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, 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 combination 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 combination 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, 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 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 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 magneto-optical rotation crystal, wherein a magnet is arranged on the periphery of the magneto-optical rotation crystal;
the first light path adjusting PBS prism is provided with a first adjusting dielectric film and a second adjusting dielectric film which are parallel to each other, and the first adjusting dielectric film and the second adjusting dielectric film are distributed along a second combination direction;
the second light path adjusting PBS prism is provided with a third adjusting dielectric film and a fourth adjusting dielectric film which are parallel to each other, and the third adjusting dielectric film and the fourth adjusting dielectric film are distributed along the second combination direction;
the second input PBS prism, the second input half-wave plate, the second adjusting dielectric film, the magneto-optical crystal, the optical half-wave plate, the fourth adjusting dielectric film, the second output half-wave plate and the second output PBS prism are sequentially arranged along a first light path direction;
the first input PBS prism, the first input half-wave plate and the first adjusting dielectric film are sequentially arranged along a second light 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 light path direction, the first light path, the second light path and the third light path are parallel, the first combining direction is perpendicular to the second combining direction, and the second 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 adjusting dielectric film, the second adjusting dielectric film, the third adjusting dielectric film and the fourth adjusting dielectric film are all polarization 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 combining direction, and the plurality of first input collimators face the same first input dielectric film.
3. The optical isolator of claim 1, wherein:
the first set of input ports includes a first stop 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 includes a plurality of second input collimators distributed along the second combining direction, and the plurality of second input collimators face the same second input dielectric film.
5. The optical isolator of claim 1, wherein:
the second set of input ports includes a second aperture 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 combining direction, and the first output collimators face the same first output dielectric film.
7. The optical isolator of claim 1, wherein:
the first set of output ports 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 includes a plurality of second output collimators distributed along the second combining direction, and the plurality of second output collimators face the same second output dielectric film.
9. The optical isolator of claim 1, wherein:
the second set of output ports includes a fourth aperture disposed between the second output collimator and the second output PBS prism.
10. The optical isolator according to any one of claims 1 to 9, wherein:
the second adjusting dielectric film is perpendicular to the fourth adjusting dielectric film.
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| 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 |
| 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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2021
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