CN116609886A - Cross interconnection polarization maintaining coupler - Google Patents
Cross interconnection polarization maintaining coupler Download PDFInfo
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- CN116609886A CN116609886A CN202310599709.7A CN202310599709A CN116609886A CN 116609886 A CN116609886 A CN 116609886A CN 202310599709 A CN202310599709 A CN 202310599709A CN 116609886 A CN116609886 A CN 116609886A
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- 230000010287 polarization Effects 0.000 title claims description 70
- 239000013307 optical fiber Substances 0.000 claims abstract description 142
- 239000000835 fiber Substances 0.000 claims abstract description 88
- 230000003287 optical effect Effects 0.000 claims description 29
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 238000004891 communication Methods 0.000 abstract description 6
- 238000000354 decomposition reaction Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
- G02B6/2753—Optical coupling means with polarisation selective and adjusting means characterised by their function or use, i.e. of the complete device
- G02B6/2793—Controlling polarisation dependent loss, e.g. polarisation insensitivity, reducing the change in polarisation degree of the output light even if the input polarisation state fluctuates
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/34—Optical coupling means utilising prism or grating
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The application discloses a cross interconnection polarization-maintaining coupler, which comprises a double-fiber polarization-maintaining optical fiber head and a single-fiber polarization-maintaining optical fiber head, wherein the double-fiber polarization-maintaining optical fiber head is connected with a first optical fiber and a second optical fiber, and the single-fiber polarization-maintaining optical fiber head is connected with a third optical fiber; the signal light is incident from any one of the first optical fiber, the second optical fiber and the third optical fiber and can be emitted from the other two optical fibers. In the application, when the signal light is incident from the first optical fiber, one part of the signal light enters the second optical fiber through reflection, and the other part of the signal light enters the third optical fiber through transmission; when the signal light is incident from the second optical fiber, one part of the signal light enters the first optical fiber, and the other part of the signal light enters the third optical fiber; when the signal light is incident from the third optical fiber, two beams of light are formed through decomposition and transmission and enter the first optical fiber and the second optical fiber respectively to form mutual communication among all channels of the coupler; any optical fiber can be used for the incidence and emergence of the signal light.
Description
Technical Field
The application relates to the field of optical fiber sensing, in particular to a cross interconnection polarization maintaining coupler.
Background
The polarization maintaining fiber coupler is a key device in the fields of optical fiber communication and sensing, and commonly adopted schemes include fusion-pull taper type, medium film type and crystal type, and the three types of couplers have distinct input and output optical fibers which cannot be communicated although the optical principles are different. In some specific application scenarios of optical fiber sensing, all channels of the coupler are required to be communicated, and the traditional coupler needs to be connected in series to achieve the purpose, so that a larger volume is required to be occupied, and further miniaturization of a sensing equipment system is hindered.
Chinese patent document CN206671606U discloses a polarization maintaining coupler and a polarization maintaining coupling device, chinese patent document CN202710786U discloses a dielectric film integrated polarization maintaining coupler, CN203164471U discloses a crystal polarization maintaining coupler, and three technical schemes all have definite input optical fibers and output optical fibers, all the input optical fibers cannot be communicated, and the couplers still need to be connected in series to realize the intercommunication among all the channels.
The patent provides a cross interconnection polarization maintaining fiber coupler, can realize cross interconnection between each passageway, is favorable to further reducing sensing equipment overall dimension, reduces the consumption simultaneously.
Disclosure of Invention
In order to solve at least one of the technical problems, the application provides a cross interconnection polarization maintaining coupler, which adopts the following technical scheme:
the application provides a cross interconnection polarization-maintaining coupler, which comprises a double-fiber polarization-maintaining optical fiber head and a single-fiber polarization-maintaining optical fiber head, wherein the double-fiber polarization-maintaining optical fiber head is connected with a first optical fiber and a second optical fiber; the single-fiber polarization-maintaining optical fiber head is connected with a third optical fiber, and the single-fiber polarization-maintaining optical fiber head and the double-fiber polarization-maintaining optical fiber head are arranged in parallel; when the signal light enters from the first optical fiber, the signal light can exit from the second optical fiber and the third optical fiber; when the signal light enters from the second optical fiber, the signal light can exit from the first optical fiber and the third optical fiber; when the signal light enters from the third optical fiber, the signal light can exit from the first optical fiber and the second optical fiber.
The embodiment of the application has at least the following beneficial effects: in the application, when the signal light is incident from the first optical fiber, one part of the signal light enters the second optical fiber through reflection, and the other part of the signal light enters the third optical fiber through transmission; when the signal light is incident from the second optical fiber, one part of the signal light enters the first optical fiber through reflection, and the other part of the signal light enters the third optical fiber through transmission; when the signal light is incident from the third optical fiber, two beams of light are formed through decomposition and transmission and enter the first optical fiber and the second optical fiber respectively to form mutual communication among all channels of the coupler; any optical fiber can be used for incidence and emergence of signal light, serial connection of traditional couplers is not needed, the size of the couplers is reduced, and further miniaturization of the sensing equipment system is facilitated.
In some embodiments of the present application, a first optical processing component is disposed on the dual-fiber polarization maintaining optical fiber head, and the first optical processing component is used for adjusting the direction of the optical path transmitted into or transmitted out of the dual-fiber polarization maintaining optical fiber head;
the single-fiber polarization-maintaining optical fiber head is provided with a second optical processing component, and the second optical processing component is used for adjusting the direction of an optical path transmitted into or transmitted out of the single-fiber polarization-maintaining optical fiber head;
the first light processing component and the second light processing component are arranged at intervals.
In certain embodiments of the present application, the first light processing assembly comprises a light splitting structure capable of transmitting and reflecting input light.
In some embodiments of the application, the first light processing assembly further comprises a prismatic structure that directs signal light to or receives signal light from the second light processing assembly.
In some embodiments of the present application, the prismatic structure includes prismatic elements, each of the prismatic elements being provided with an inclined end, each of the inclined ends being butted against each other.
In certain embodiments of the present application, the second light management component comprises a polarizing structure having a polarization direction aligned with the third fiber stress axis direction.
In some embodiments of the application, the stress axes of the first optical fiber and the second optical fiber are oriented perpendicular to each other.
In some embodiments of the present application, the first light processing assembly further includes a first collimating lens disposed between the dual-fiber polarization maintaining fiber head and the light splitting structure.
In some embodiments of the present application, the second light processing assembly further includes a second collimating lens disposed between the single fiber polarization maintaining fiber head and the polarizing structure.
In some embodiments of the present application, the cross-connect polarization maintaining coupler further includes a housing structure, wherein the housing structure is hollow, and the dual-fiber polarization maintaining fiber head, the first optical processing component, the second optical processing component, and the single-fiber polarization maintaining fiber head are all located in the housing structure.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of a prior art configuration in which channels are interconnected by conventional coupler concatenation;
FIG. 2 is a schematic diagram of the optical path of a first state of operation of the cross-connect polarization maintaining coupler of the present application;
FIG. 3 is a schematic view of the optical path of the cross-connect polarization maintaining coupler of the present application in a second operational state;
FIG. 4 is a schematic view of the optical path of the cross-connect polarization maintaining coupler of the present application in a third operational state;
FIG. 5 is a schematic diagram of the structure of a cross-connect polarization maintaining coupler of the present application;
FIG. 6 is a schematic diagram of stress axis directions of a first optical fiber and a second optical fiber in a cross-connect polarization maintaining coupler of the present application;
fig. 7 is a schematic diagram of the stress axis direction of a third fiber in a cross-connect polarization maintaining coupler of the present application.
Reference numerals:
a dual-fiber polarization maintaining fiber head 101; a first optical fiber 102; a second optical fiber 103; a first light processing assembly 104;
single fiber polarization maintaining fiber stub 201; a third optical fiber 202; a second light processing assembly 203;
a light splitting structure 301; a prism unit 302; a first collimating lens 303;
a polarizing structure 401; a second collimating lens 402;
and a receiving structure 501.
Detailed Description
This section will describe in detail embodiments of the present application with reference to fig. 1 to 7, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.
In the description of the present application, it should be understood that, if the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are used as directions or positional relationships based on the directions shown in the drawings, the directions are merely for convenience of description and for simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present application. Features defining "first", "second" are used to distinguish feature names from special meanings, and furthermore, features defining "first", "second" may explicitly or implicitly include one or more such features. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1, in some optical fiber sensing fields, all channels of the coupler need to be communicated, so that separate limitation of input or output of each optical fiber in the coupler is avoided, and the conventional coupler needs to be connected in series. Thus, it is necessary to occupy a larger volume, and more parts are used, which is disadvantageous for the miniaturized design of the sensing device system.
The embodiment of the application provides a cross-connection polarization-maintaining coupler, which comprises a double-fiber polarization-maintaining optical fiber head 101 and a single-fiber polarization-maintaining optical fiber head 201.
The dual-fiber polarization maintaining fiber head 101 is connected with two optical fibers, namely a first optical fiber 102 and a second optical fiber 103, and the first optical fiber 102 and the second optical fiber 103 are arranged on the optical fiber polarization maintaining fiber head in parallel and extend to the outside of the cross-connection polarization maintaining coupler. The first optical fiber 102 and the second optical fiber 103 can both input or output signal light.
Further, in order to ensure that the signal light can have multiple optical propagation modes in the cross interconnection polarization maintaining coupler so as to form mutual communication among the optical fibers, the dual-fiber polarization maintaining optical fiber head 101 is provided with a first optical processing component 104, and the first optical processing component 104 can transmit, reflect and decompose the signal light. The light path direction is changed by the first light processing component 104 during the signal light propagation process in various directions.
It is understood that the first optical fiber 102 and the second optical fiber 103 extend outwardly from a first end of the dual-fiber polarization maintaining fiber head 101, and the first light processing assembly 104 is disposed at a second end of the dual-fiber polarization maintaining fiber head 101.
The single-fiber polarization maintaining fiber head 201 is connected to one optical fiber, namely a third optical fiber 202, the third optical fiber 202 extends to the outside of the cross interconnection polarization maintaining coupler, and the third optical fiber 202 can be used for inputting or outputting signal light. The single-fiber polarization-maintaining optical fiber head 201 and the double-fiber polarization-maintaining optical fiber head 101 are arranged in parallel, specifically, the single-fiber polarization-maintaining optical fiber head 201 and the double-fiber polarization-maintaining optical fiber head 101 are kept coaxial, so that signal light can be conveniently transmitted in the cross-interconnection polarization-maintaining coupler.
Further, in order to ensure that the signal light can have multiple optical propagation modes in the cross interconnection polarization maintaining coupler so as to form mutual communication among the optical fibers, the single-fiber polarization maintaining optical fiber head 201 is provided with a second optical processing assembly 203, and the second optical processing assembly 203 can polarize and transmit the signal light. The direction of the optical path is changed by the second optical processing component 203 during the signal light propagation in various directions.
The first light processing component 104 is disposed adjacent to the second light processing component 203, and has a certain interval, so that the signal light passing out of the first light processing component 104 enters the second light processing component 203, and similarly, the signal light passing out of the second light processing component 203 enters the first light processing component 104.
When the signal light enters the first optical fiber 102 through the adjustment of the first optical processing component 104 and the second optical processing component 203, the signal light can exit from the second optical fiber 103 and the third optical fiber 202; when the signal light enters the second optical fiber 103, the signal light can exit from the first optical fiber 102 and the third optical fiber 202; when the signal light enters the third optical fiber 202, the signal light can be emitted from the first optical fiber 102 and the second optical fiber 103.
As shown in fig. 5, in some examples, the first light processing component 104 includes a first collimating lens 303, and the signal light is converted into parallel collimated light beams in the process of passing through the first collimating lens 303, so that the propagation direction of the signal light is approximately uniform, and the propagation direction of the signal light is convenient to be changed subsequently. The first collimating lens 303 is connected to the dual-fiber polarization maintaining fiber head 101, and specifically, to facilitate light propagation between the first collimating lens 303 and the first optical fiber 102, and between the first collimating lens 303 and the second optical fiber 103, the first collimating lens 303 and the dual-fiber polarization maintaining fiber head 101 are disposed approximately coaxially.
In some examples, the first light processing assembly 104 further includes a light splitting structure 301, the light splitting structure 301 being capable of reflecting a portion of the input light and transmitting another portion of the input light. Wherein, the reflection and transmission of the light-splitting structure 301 are performed according to a certain power ratio, and a user can select a specific light-splitting structure 301 according to the requirement. Specifically, the spectroscopic structure 301 employs a spectroscopic membrane.
Further, the light splitting structure 301 is connected to an end of the first collimating lens 303, that is, the first collimating lens 303 is disposed between the dual-fiber polarization maintaining fiber head 101 and the light splitting structure 301. It will be appreciated that the beam splitting structure 301 is also approximately coaxial with the first collimating lens 303.
In some examples, the first light processing assembly 104 further includes a prism structure, and the signal light is capable of generating two linearly polarized light beams separated from each other and having vibration directions perpendicular to each other after passing through the prism structure.
Further, the prism structure is connected to an end of the beam splitting structure 301, i.e. the beam splitting structure 301 is disposed between the prism structure and the first collimating lens 303. It will be appreciated that the prismatic structure is also approximately coaxial with the beam splitting structure 301.
Specifically, the prism structure is located at the innermost side of the first light processing component 104, and the signal light passing through the prism structure is further led into the second light processing component 203; similarly, the signal light passing through the second light processing unit 203 is further guided into the prism structure, and thus enters the first light processing unit 104.
In some examples, the prism structure employs a wollaston prism, where the wollaston prism includes two prism units 302, each prism unit 302 is provided with a tilted end and a flat end, and the two tilted ends are butted against each other to form a complete wollaston prism, so that the two flat ends face the outside of the wollaston prism. Specifically, the optical axes of the two prism units 302 are perpendicular to each other.
In some examples, the dual-fiber polarization maintaining fiber head 101, the first collimating lens 303, the light splitting structure 301, and the prism structure are sequentially arranged and bonded into an approximately coaxial whole by an adhesive.
In some examples, the second light processing assembly 203 includes a second collimating lens 402, and the signal light is converted into parallel collimated light beams during the process of passing through the second collimating lens 402, so that the propagation directions of the signal light are approximately uniform. The second collimating lens 402 is connected to the single-fiber polarization-maintaining fiber head 201, and in particular, to facilitate light propagation between the second collimating lens 402 and the third optical fiber 202, the second collimating lens 402 is disposed approximately coaxially with the single-fiber polarization-maintaining fiber head 201.
As shown in fig. 6, in some examples, the second light processing component 203 further includes a polarizing structure 401, where the polarization direction of the polarizing structure 401 is aligned with the stress axis direction of the third optical fiber 202, and the polarizing structure 401 is typically manufactured with high-quality optical glass, and the diopter and the camber are strictly controlled by advanced production techniques, so as to ensure the accuracy of the polarizing structure 401.
Further, the polarizing structure 401 is connected to an end of the second collimating lens 402, that is, the second collimating lens 402 is disposed between the single-fiber polarization maintaining fiber head 201 and the polarizing structure 401. It will be appreciated that the polarizing structure 401 is also approximately coaxial with the second collimating lens 402. Specifically, the polarizing structure 401 employs a polarizing plate.
In some examples, the single fiber polarization maintaining fiber head 201, the second collimating lens 402, and the polarizing structure 401 are sequentially arranged and bonded into an approximately coaxial whole by an adhesive.
As shown in fig. 2, in the first working state of the cross-interconnection polarization-maintaining coupler, the signal light is incident from the first optical fiber 102, passes through the first collimating lens 303 and reaches the light splitting structure 301, at this time, a part of the signal light is reflected back to the second optical fiber 103, and a part of the signal light is transmitted to the prism structure and then reaches the polarization structure 401, and the signal light is transmitted through the polarization structure 401 and enters the third optical fiber 202.
As shown in fig. 3, in the second working state of the cross-interconnection polarization-maintaining coupler, the signal light is incident from the second optical fiber 103, passes through the first collimating lens 303 and reaches the light splitting structure 301, at this time, a part of the signal light is reflected back to the first optical fiber 102, and a part of the signal light is transmitted to the prism structure and then reaches the polarization structure 401, and the signal light is transmitted through the polarization structure 401 and enters the third optical fiber 202.
As shown in fig. 4, in the third working state of the cross interconnection polarization maintaining coupler, when the signal light enters from the third optical fiber 202, all the signal light passes through the polarization structure 401, and further the prism structure is split into two beams of light, and the two beams of light enter the first optical fiber 102 and the second optical fiber 103 respectively through the transmission of the light splitting structure 301.
In some examples, the split ratio between the channels can be adjusted in two ways, one of which, the split ratio of the splitting structure 301 is adjusted; and secondly, adjusting the included angle of the optical axis of the prism structure of the polarizing structure 401.
As shown in fig. 7, in some examples, the stress axes of the first optical fiber 102 and the second optical fiber 103 are oriented perpendicular to each other. The directions of the stress axes perpendicular to each other correspond to the polarization states of the input light perpendicular to each other, so that the polarization beam combination requirement of the Wollaston prism is just met, that is, the mutually perpendicular polarized light is incident to the Wollaston prism, a polarization beam combination effect can be generated, the light input by the first optical fiber 102 and the second optical fiber 103 can pass through the Wollaston prism, the direction of the light path is kept consistent, and finally the light enters the third optical fiber 202.
In some examples, the cross-connect polarization maintaining coupler further comprises a housing structure 501, and the dual-fiber polarization maintaining fiber head 101, the first optical processing component 104, the second optical processing component 203, and the single-fiber polarization maintaining fiber head 201 are all within the housing structure 501. The accommodating structure 501 prevents the damage of each internal structure, and ensures the stable relative position of each internal structure, thereby being beneficial to precisely controlling the propagation direction of the signal light. Wherein, the dual-fiber polarization-maintaining fiber head 101 and the single-fiber polarization-maintaining fiber head 201 are fixed inside the accommodating structure 501 by an adhesive. Specifically, the housing structure 501 employs a glass tube.
In the description of the present specification, if a description appears that makes reference to the term "one embodiment," "some examples," "some embodiments," "an exemplary embodiment," "an example," "a particular example," or "some examples," etc., it is intended that the particular feature, structure, material, or characteristic described in connection with the embodiment or example be included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present application.
Claims (10)
1. A cross-connect polarization maintaining coupler, comprising:
the double-fiber polarization-maintaining optical fiber head is connected with the first optical fiber and the second optical fiber;
the single-fiber polarization-maintaining optical fiber head is connected with a third optical fiber, and the single-fiber polarization-maintaining optical fiber head and the double-fiber polarization-maintaining optical fiber head are arranged in parallel;
when the signal light enters from the first optical fiber, the signal light can exit from the second optical fiber and the third optical fiber; when the signal light enters from the second optical fiber, the signal light can exit from the first optical fiber and the third optical fiber; when the signal light enters from the third optical fiber, the signal light can exit from the first optical fiber and the second optical fiber.
2. The cross-connect polarization maintaining coupler of claim 1, wherein,
the dual-fiber polarization-maintaining optical fiber head is provided with a first light processing component, and the first light processing component is used for adjusting the direction of a light path transmitted into or transmitted out of the dual-fiber polarization-maintaining optical fiber head;
the single-fiber polarization-maintaining optical fiber head is provided with a second optical processing component, and the second optical processing component is used for adjusting the direction of an optical path transmitted into or transmitted out of the single-fiber polarization-maintaining optical fiber head;
the first light processing component and the second light processing component are arranged at intervals.
3. The cross-connect polarization maintaining coupler of claim 2, wherein,
the first light processing assembly includes a light splitting structure capable of transmitting and reflecting input light.
4. The cross-connect polarization maintaining coupler of claim 2, wherein,
the first light processing assembly further includes a prismatic structure that directs signal light to or receives signal light from the second light processing assembly.
5. The cross-connect polarization maintaining coupler of claim 4, wherein,
the prism structure comprises prism units, wherein each prism unit is provided with an inclined end, and the inclined ends are mutually butted.
6. The cross-connect polarization maintaining coupler of claim 2, wherein,
the second light processing assembly includes a polarizing structure having a polarization direction aligned with the third fiber stress axis direction.
7. The cross-connect polarization maintaining coupler of claim 1, wherein,
the stress axis directions of the first optical fiber and the second optical fiber are mutually perpendicular.
8. The cross-connect polarization maintaining coupler of claim 3, wherein,
the first light processing assembly further comprises a first collimating lens, and the first collimating lens is arranged between the double-fiber polarization maintaining fiber head and the light splitting structure.
9. The cross-connect polarization maintaining coupler of claim 6, wherein,
the second light processing assembly further comprises a second collimating lens, and the second collimating lens is arranged between the single-fiber polarization maintaining fiber head and the polarization structure.
10. The cross-connect polarization maintaining coupler of claim 2, wherein,
the cross interconnection polarization-maintaining coupler further comprises a containing structure, wherein the containing structure is hollow, and the double-fiber polarization-maintaining fiber heads, the first light processing assembly, the second light processing assembly and the single-fiber polarization-maintaining fiber heads are all located in the containing structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310599709.7A CN116609886A (en) | 2023-05-25 | 2023-05-25 | Cross interconnection polarization maintaining coupler |
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| CN202310599709.7A CN116609886A (en) | 2023-05-25 | 2023-05-25 | Cross interconnection polarization maintaining coupler |
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| CN116609886A true CN116609886A (en) | 2023-08-18 |
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| CN202310599709.7A Pending CN116609886A (en) | 2023-05-25 | 2023-05-25 | Cross interconnection polarization maintaining coupler |
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