CN219758543U - Array optical circulator - Google Patents
Array optical circulator Download PDFInfo
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- CN219758543U CN219758543U CN202320483146.0U CN202320483146U CN219758543U CN 219758543 U CN219758543 U CN 219758543U CN 202320483146 U CN202320483146 U CN 202320483146U CN 219758543 U CN219758543 U CN 219758543U
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- 239000013307 optical fiber Substances 0.000 claims abstract description 69
- 239000011521 glass Substances 0.000 claims description 13
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- 238000003491 array Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 3
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- 239000000835 fiber Substances 0.000 description 11
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Abstract
The utility model relates to the technical field of optical communication, and provides an array optical circulator. The first collimating array device and the second collimating array device are provided with a plurality of optical fiber heads in an array mode, and optical signals are transmitted among the plurality of optical fiber heads through the circulator core piece in a preset optical path, so that the purpose of integrating a plurality of three-port circulators is achieved. The array optical circulator integrates a plurality of three-port circulators, has a plurality of optical signal transmission paths, and can transmit multipath optical signals. In addition, the internal element structure of the array optical circulator is compact, the functions of the whole device are powerful, and a plurality of circulators share one core piece, so that the material cost and the assembly cost of the array optical circulator are low.
Description
Technical Field
The utility model relates to the technical field of optical communication, in particular to an array optical circulator.
Background
The optical circulator is a multi-port nonreciprocal optical device, optical signals can only be transmitted along a specific port in the device in sequence, namely when the optical signals are input from the specific port, the optical signals can only be output from the specific port, and if the optical signals are not transmitted in the specific port sequence, the attenuation of the optical signals of the device is very large, and the optical circulator plays a role in isolating the optical signals. The optical circulator realizes single-fiber bidirectional transmission in optical communication, and is widely applied to the fields of uplink/downlink speech channels, wave combination/wave division, dispersion compensation and the like. The existing optical circulator has the defects of large volume, complex devices and few optical transmission channels, and along with the continuous expansion of an optical communication system, the optical transmission channels are continuously increased, so that the optical circulator is developed towards miniaturization and integration.
In view of this, overcoming the drawbacks of the prior art is a problem to be solved in the art.
Disclosure of Invention
The utility model aims to solve the technical problems of large size, complex devices and few optical transmission channels of an array optical circulator.
The utility model adopts the following technical scheme:
an array optical circulator, comprising: a first collimating array 1, a second collimating array 2 and a circulator core 3, wherein:
within the first and second collimating arrays 1 and 2, there are provided a plurality of optical fiber heads arrayed in a predetermined manner, the optical fiber heads being for transmitting optical signals; the number of optical fiber heads on the first collimating array 1 side is twice the number of optical fiber heads on the second collimating array 2 side; each two optical fiber heads in the first collimating array 1 and each optical fiber head in the second collimating array 2 form a three-port circulator, and a plurality of three-port circulators are formed in a conformal manner;
the circulator core 3 is used for adjusting a transmission path of an optical signal so as to transmit the optical signal between predetermined optical fiber heads.
Further, the first collimator 1 further comprises a first glass tube and a first lens, wherein the first lens is positioned at the front end of the first collimator 1, and a plurality of optical fiber heads are accommodated in the first glass tube;
the second collimating array 2 further comprises a second glass tube and a second lens, wherein the second lens is positioned at the front end of the second collimating array 2, and a plurality of optical fiber heads are accommodated in the second glass tube.
Further, the circulator core 3 includes: a first beam splitter 311 and a second beam splitter 312, wherein:
the first beam splitter 311 and the second beam splitter 312 are disposed at two sides of the circulator core 3, the first beam splitter 311 is disposed opposite to the first collimating array 1, and the second beam splitter 312 is disposed opposite to the second collimating array 2;
further, the circulator core 3 further includes: a first half-wave plate 321, a second half-wave plate 322, a third half-wave plate 323, a fourth half-wave plate 324, a first faraday rotator 341, a second faraday rotator 342, a first wedge 331, and a second wedge 332, wherein:
the first wedge-shaped piece 331 and the second wedge-shaped piece 332 are positioned at the middle part of the circulator core 3, and the first wedge-shaped piece 331 and the second wedge-shaped piece 332 are in butt joint;
the first faraday rotator 341 is disposed between the first wedge 331 and the first beam splitter 311, and the second faraday rotator 342 is disposed between the second wedge 332 and the second beam splitter 312;
the first half-wave plate 321 and the second half-wave plate 322 are disposed opposite to each other, and the first half-wave plate 321 and the second half-wave plate 322 are disposed between the first half-wave plate 321 and the first faraday rotator 341 and the first beam splitter 311;
the third half-wave plate 323 and the fourth half-wave plate 324 are disposed opposite to each other, and the third half-wave plate 323 and the fourth half-wave plate 324 are disposed between the second half-wave plate 322 and the second faraday rotator 342 and the second beam splitter 312.
Further, the circulator core 3 further includes a magnetic ring 35, and the magnetic ring 35 accommodates the first beam splitter 311, the second beam splitter 312, the first half-wave plate 321, the second half-wave plate 322, the third half-wave plate 323, the fourth half-wave plate 324, the first faraday rotator 341, the second faraday rotator 342, the first wedge 331, and the second wedge 332.
Further, the first beam splitter 311, the second beam splitter 312, the first faraday rotator 341, the second faraday rotator 342, the first wedge 331 and the second wedge 332 are disposed on the same axis, the first half-wave plate 321 and the second half-wave plate 322 are symmetrically disposed on two sides of the axis, and the third half-wave plate 323 and the fourth half-wave plate 324 are also symmetrically disposed on two sides of the axis.
Further, the incidence angles of the first beam splitter 311 and the second beam splitter 312 are set to any angle that is not parallel to the main optical path;
an included angle between the optical axis of the first half-wave plate 321 and the optical axis of the second half-wave plate 322 is set to 135 degrees or 45 degrees;
the angle between the optical axis of the third half-wave plate 323 and the optical axis of the fourth half-wave plate 324 is set to 135 degrees or 45 degrees;
the optical axis of the first beam splitter 311 and the optical axis of the second beam splitter 312 are disposed parallel to each other.
Further, the array mode of the optical fiber heads of the first collimating array 1 is an n×m array, and the array mode of the optical fiber heads of the second collimating array 2 is an (N/2) ×m array.
Further, the array mode of the optical fiber heads in the first collimating array 1 and the second collimating array 2 is a linear array.
Further, the optical fiber heads in the first collimating array 1 and the second collimating array 2 are optical fiber heads which are not subjected to beam expansion treatment.
Further, the number of optical fiber heads in the first collimating array 1 is twice the number of optical fiber heads in the second collimating array 2.
In the utility model, the first collimating array 1 and the second collimating array 2 are provided with a plurality of optical fiber heads in an array mode, and optical signals are transmitted among the plurality of optical fiber heads through the circulator core element 3 in a preset optical path, so that the purpose of integrating a plurality of three-port circulators is achieved. The array optical circulator integrates a plurality of three-port circulators, has a plurality of optical signal transmission paths, and can transmit multipath optical signals. In addition, the internal element structure of the array optical circulator is compact, the functions of the whole device are powerful, and a plurality of circulators share one core piece, so that the material cost and the assembly cost of the array optical circulator are low.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings that are required to be used in the embodiments of the present utility model will be briefly described below. It is evident that the drawings described below are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of an arrayed optical circulator according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of another arrayed optical circulator according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a first collimating array structure of an array optical circulator according to an embodiment of the utility model;
FIG. 4 is a schematic diagram of a second collimating array structure corresponding to the first collimating array of FIG. 3 according to an embodiment of the present utility model;
FIG. 5 is a schematic diagram of another first collimating array of an array optical circulator according to an embodiment of the utility model;
FIG. 6 is a schematic diagram of a second collimating array structure corresponding to the first collimating array of FIG. 5, according to an embodiment of the present utility model;
FIG. 7 is a schematic diagram of an optical path of an arrayed optical circulator according to an embodiment of the present utility model;
fig. 8 is a schematic view of an optical path in a top view of fig. 7 according to an embodiment of the present utility model.
Wherein, the reference numerals are as follows: a first collimating array 1; a second collimating array 2; a circulator core 3; a first beam splitter 311; a second beam splitter 312; a first half-wave plate 321; a second half-wave plate 322; a third half-wave plate 323; a fourth half-wave plate 324; a first wedge-shaped piece 331; a second wedge 332; a first faraday rotator 341; a second faraday rotator 342; and a magnetic ring 35.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
In the description of the present utility model, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", etc. refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of describing the present utility model and do not require that the present utility model must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
Example 1:
embodiment 1 of the present utility model provides an arrayed optical circulator, with reference to fig. 1, including: a first collimating array 1, a second collimating array 2 and a circulator core 3, wherein:
the first collimating array 1, the second collimating array 2 and the circulator core 3 are arranged on the same axis. Within the first and second collimating arrays 1 and 2, there are provided a plurality of optical fiber heads arrayed in a predetermined manner, the optical fiber heads being for transmitting optical signals; the number of optical fiber heads on the first collimating array 1 side is twice the number of optical fiber heads on the second collimating array 2 side; each two optical fiber heads in the first collimating array 1 and each optical fiber head in the second collimating array 2 form a three-port circulator, and a plurality of three-port circulators are formed in a conformal manner. The circulator core 3 is used for adjusting a transmission path of an optical signal so as to transmit the optical signal between predetermined optical fiber heads.
Wherein between the circulator cores 3, the optical paths between the optical fiber heads of the first collimating array 1 and the optical fiber heads of the second collimating array 2 have been preset to realize the function of a plurality of three-port circulators.
In the utility model, the first collimating array 1 and the second collimating array 2 are provided with a plurality of optical fiber heads in an array mode, and optical signals are transmitted among the plurality of optical fiber heads through the circulator core element 3 in a preset optical path, so that the purpose of integrating a plurality of three-port circulators is achieved. The array optical circulator integrates a plurality of three-port circulators, has a plurality of optical signal transmission paths, and can transmit multipath optical signals. In addition, the internal element structure of the array optical circulator is compact, the functions of the whole device are powerful, and a plurality of circulators share one core piece, so that the material cost and the assembly cost of the array optical circulator are low.
In order to accommodate the optical fiber heads, the first alignment array device 1 further comprises a first glass tube and a first lens, wherein the first lens is positioned at the front end of the first alignment array device 1, and a plurality of optical fiber heads are accommodated in the first glass tube; the second collimating array 2 further comprises a second glass tube and a second lens, wherein the second lens is positioned at the front end of the second collimating array 2, and a plurality of optical fiber heads are accommodated in the second glass tube.
Specifically, the housing of the first collimating array 1 is the first glass tube, and a first lens is disposed at the front end of the first collimating array 1, and the first lens refracts the propagation direction of the optical signal to a certain extent. The first collimating array 1 and the second collimating array 2 differ in the number of optical fiber heads therein.
In this embodiment, in connection with fig. 2, in order to achieve transmission of optical signals between specific optical fiber heads, the circulator core 3 comprises: the first beam splitter 311, the second beam splitter 312, the first half-wave plate 321, the second half-wave plate 322, the third half-wave plate 323, the fourth half-wave plate 324, the first faraday rotator 341, the second faraday rotator 342, the first wedge 331, and the second wedge 332.
The first beam splitter 311 and the second beam splitter 312 are disposed on both sides of the circulator core 3, the first beam splitter 311 is disposed opposite to the first collimator array 1, and the second beam splitter 312 is disposed opposite to the second collimator array 2.
The first wedge-shaped piece 331 and the second wedge-shaped piece 332 are located in the middle of the circulator core 3, and the first wedge-shaped piece 331 and the second wedge-shaped piece 332 are in butt joint.
The first faraday rotator 341 is disposed between the first wedge 331 and the first beam splitter 311, and the second faraday rotator 342 is disposed between the second wedge 332 and the second beam splitter 312.
The first half-wave plate 321 and the second half-wave plate 322 are disposed opposite to each other, and the first half-wave plate 321 and the second half-wave plate 322 are disposed between the first half-wave plate 321 and the first faraday rotator 341 and the first beam splitter 311.
The third half-wave plate 323 and the fourth half-wave plate 324 are disposed opposite to each other, and the third half-wave plate 323 and the fourth half-wave plate 324 are disposed between the second half-wave plate 322 and the second faraday rotator 342 and the second beam splitter 312.
Wherein the first beam splitter 311 and the second beam splitter 312 are configured to split the optical signal into an ordinary light and an extraordinary light with vibration directions perpendicular to each other; the first half-wave plate 321, the second half-wave plate 322, the third half-wave plate 323, the fourth half-wave plate 324, the first faraday rotator 341 and the second faraday rotator 342 are used for deflecting the vibration directions of the ordinary light and the extraordinary light so as to mutually convert the ordinary light and the extraordinary light; the first wedge-shaped piece 331 and the second wedge-shaped piece 332 are used for deflecting the propagation directions of the ordinary light and the extraordinary light, so that the optical signal is transmitted in the circulator core 3 according to a preset optical path.
In order to form the whole of the circulator core 3, referring to fig. 2, the circulator core 3 further includes a magnetic ring 35, and the first beam splitter 311, the second beam splitter 312, the first half-wave plate 321, the second half-wave plate 322, the third half-wave plate 323, the fourth half-wave plate 324, the first faraday rotator 341, the second faraday rotator 342, the first wedge 331, and the second wedge 332 are accommodated in the magnetic ring 35.
The magnetic ring 35 is further configured to cooperate with the first faraday rotator 341 and the second faraday rotator 342 to interfere with the vibration direction of the optical signal.
In this embodiment, in order to make the optical signal transmit in a predetermined direction, the first beam splitter 311, the second beam splitter 312, the first faraday rotator 341, the second faraday rotator 342, the first wedge 331 and the second wedge 332 are disposed on the same axis, the first half-wave plate 321 and the second half-wave plate 322 are symmetrically disposed on both sides of the axis, and the third half-wave plate 323 and the fourth half-wave plate 324 are also symmetrically disposed on both sides of the axis.
In order to polarize the ordinary light and the extraordinary light at a predetermined angle, in the present embodiment, the incident angles of the first beam splitter 311 and the second beam splitter 312 are set to any angle that is not parallel to the main optical path. The angle between the optical axis of the first half wave plate 321 and the optical axis of the second half wave plate 322 is set to 135 degrees or 45 degrees. The angle between the optical axis of the third half-wave plate 323 and the optical axis of the fourth half-wave plate 324 is set to 135 degrees or 45 degrees. The optical axis of the first beam splitter 311 and the optical axis of the second beam splitter 312 are disposed parallel to each other.
Wherein, when the included angle between the optical axis of the first half-wave plate 321 and the optical axis of the second half-wave plate 322 is set to 135 degrees, the included angle between the optical axis of the third half-wave plate 323 and the optical axis of the fourth half-wave plate 324 is set to 135 degrees; when the included angle between the optical axis of the first half-wave plate 321 and the optical axis of the second half-wave plate 322 is set to 45 degrees, the included angle between the optical axis of the third half-wave plate 323 and the optical axis of the fourth half-wave plate 324 is set to 45 degrees.
In order to integrate a plurality of three-port circulators in the array optical circulator, referring to fig. 3 and 4, the optical fiber heads of the first collimating array 1 are arrayed in an n×m array, and the optical fiber heads of the second collimating array 2 are arrayed in an (N/2) ×m array. Wherein M, N is an integer, M is greater than or equal to 2, and N is greater than or equal to 4.
Specifically, the number of optical fiber heads included in the first collimating array 1 is twice that of the second collimating array 2, and the correspondence relationship between the optical fiber heads is preset. In the first collimating array 1 shown in fig. 3 and the second collimating array 2 shown in fig. 4, n=4, m=4, i.e. the first collimating array 1 comprises 16 fiber heads and the second collimating array 2 comprises 8 fiber heads, each two fiber heads in the first collimating array 1 and each fiber head in the second collimating array 2 form a three-port circulator, and the three-port circulators are formed in a conformal manner. For example, the optical fiber heads numbered 1 and 9 in the first collimating array 1 and the optical fiber head numbered 17 in the second collimating array 2 form a three-port circulator; the optical fiber heads numbered 5 and 13 in the first collimating array 1 and the optical fiber head numbered 21 in the second collimating array 2 form a three-port circulator; the optical fiber heads numbered 2 and 10 in the first collimating array 1 and the optical fiber head numbered 18 in the second collimating array 2 form a three-port circulator; and so on, at this time, a total of 8 three-port circulators are composed. That is, when the first collimating array 1 includes n×m optical fiber heads and the second collimating array 2 includes (N/2) ×m optical fiber heads, the array optical circulator has (N/2) ×m three-port circulators integrated therein.
In an alternative embodiment, referring to fig. 5 and 6, the first collimating array 1 includes 8 fiber heads, the second collimating array 2 includes 4 fiber heads, and each two fiber heads in the first collimating array 1 and each fiber head in the second collimating array 2 form a three-port circulator, and form 4 three-port circulators. In the first collimating array 1 and the second collimating array 2, the array mode of the optical fiber heads is a linear array, and the optical fiber heads of the linear array are suitable for the situation of integrating fewer three-port circulators. At this time, the optical fiber heads numbered 1 and 2 in the first collimating array 1 and the optical fiber head numbered 9 in the second collimating array 2 form a three-port circulator; the fiber heads numbered 3 and 4 in the first collimating array 1 and the fiber head numbered 10 in the second collimating array 2 form a three-port circulator, and so on.
In order to save the cost of the array optical circulator, in this embodiment, the optical fiber heads in the first collimating array 1 and the second collimating array 2 are optical fiber heads without beam expansion treatment, and the cost of the first collimating array 1 and the second collimating array 2 can be reduced by using the optical fiber heads without beam expansion.
The specific structure of the array optical circulator is described above, and the working procedure of the array optical circulator is described below with reference to fig. 8.
The signal light is input from the first collimator 1, enters the first beam splitter 311, and the refracted light is split into ordinary light (o light) and extraordinary light (e light) with mutually perpendicular vibration directions in the first beam splitter 311, and the propagation directions are unchanged.
After the e light enters the first wave plate, the vibration direction of the e light rotates 67.5 degrees by taking the optical axis of the first half wave 105 as a symmetry axis, the e light enters the first faraday rotation piece 341, the vibration direction of the e light rotates 45 degrees counterclockwise, the e light enters the first wedge piece 331 and the second wedge piece 332, after the e light passes through the first wedge piece 331 and the second wedge piece 332, the propagation direction of the e light is offset by a certain distance relative to the signal light, the vibration direction of the e light is unchanged, the e light continuously propagates forward, the vibration direction of the e light enters the second faraday rotation piece 342, the vibration direction of the e light rotates 45 degrees counterclockwise, the vibration direction of the e light enters the third half wave piece 323, and the vibration direction of the e light rotates 22.5 degrees by taking the optical axis of the third half wave plate 323 as a symmetry axis, and the e light is changed into o light.
Similarly, after the o-ray enters the second half-wave plate 322 and passes through the second half-wave plate 322, the vibration direction of the o-ray rotates 22.5 degrees with the optical axis of the second half-wave 106 as the symmetry axis, the o-ray enters the first faraday rotator 341, the vibration direction of the o-ray rotates 45 degrees counterclockwise, the o-ray enters the first wedge-shaped plate 331 and the second wedge-shaped plate 332, the propagation direction of the o-ray is offset a certain distance from the other side of the signal light after passing through the first wedge-shaped plate 331 and the second wedge-shaped plate 332, the vibration direction of the o-ray is unchanged, the o-ray continues to propagate forward, the vibration direction of the o-ray enters the second faraday rotator 342, the vibration direction of the o-ray rotates 45 degrees counterclockwise, the o-ray enters the fourth half-wave plate 324, and the vibration direction of the o-ray rotates 67.5 degrees with the optical axis of the third half-wave plate 323 as the symmetry axis, and the o-ray becomes the e-ray. The converted o-ray and e-ray are incident on the second beam splitter 312, and the propagation directions of the o-ray and e-ray are parallel to the incident light, and coupled into the second collimator array 22.
When an optical signal is input from the second collimating array 22 and enters the second beam splitter 312, the optical signal is split into o light and e light with vibration directions perpendicular to each other in the second beam splitter 312, the o light enters the fourth half-wave plate 324, the vibration directions of the o light rotate 67.5 degrees around the fourth half-wave plate 324 as a symmetry axis, the o light continues to propagate, the o light enters the second faraday rotation plate 342, the vibration directions of the o light rotate 45 degrees counterclockwise under the action of an external magnetic field, the o light enters the second wedge plate 332 and the first wedge plate 331, the propagation directions of the o light are offset to one side by a certain distance relative to the signal direction after passing through the second wedge plate 332 and the first wedge plate 331, the vibration directions of the o light continue to propagate forward, the vibration directions of the o light enter the second half-wave plate 322 and rotate 45 degrees around the optical axis of the second half-wave plate 322 as a symmetry axis, and at this time the vibration directions of the o light is converted into e light.
Similarly, the e light enters the third half-wave plate 323, the e light passes through the third half-wave plate 323, the vibration direction of the e light rotates 45 degrees by taking the third half-wave plate 323 as a symmetry axis, the e light continuously propagates, the e light enters the second faraday rotator 342, the vibration direction of the e light rotates 45 degrees counterclockwise under the action of an external magnetic field, the e light enters the second wedge plate 332 and the first wedge plate 331, the propagation direction of the e light is offset by a certain distance relative to the signal light after passing through the second wedge plate 332 and the first wedge plate 331, the vibration direction of the e light is unchanged, the e light continuously propagates forwards, the vibration direction of the e light enters the first faraday rotator 341, the vibration direction of the e light enters the first half-wave plate 321 counterclockwise, the vibration direction of the e light rotates 67.5 degrees by taking the optical axis of the first half-wave plate 321 as a symmetry axis, and at this time, the e light is converted into o light. The converted o-light and e-light are incident on the first beam splitter 311, and the propagation directions of the o-light and e-light are parallel to the incident light, and coupled into the first collimator 1.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. An array optical circulator, comprising: a first collimating array (1), a second collimating array (2) and a circulator core (3), wherein:
the first collimating array (1), the second collimating array (2) and the circulator core (3) are arranged on the same axis;
-within said first (1) and second (2) collimator arrays, a plurality of optical fiber heads are arranged in a predetermined manner, said optical fiber heads being used for transmitting optical signals; the number of optical fiber heads on the first collimating array (1) side is twice the number of optical fiber heads on the second collimating array (2) side; each two optical fiber heads in the first collimating array (1) and each optical fiber head in the second collimating array (2) form a three-port circulator, and a plurality of three-port circulators are formed in a conformal manner;
the circulator core (3) is used for adjusting the transmission path of the optical signal so as to transmit the optical signal between the preset optical fiber heads.
2. The array light circulator of claim 1, wherein the first collimating array (1) further comprises a first glass tube and a first lens, the first lens being located at a front end of the first collimating array (1), the first glass tube accommodating a plurality of optical fiber heads;
the second collimating array (2) further comprises a second glass tube and a second lens, wherein the second lens is positioned at the front end of the second collimating array (2), and a plurality of optical fiber heads are accommodated in the second glass tube.
3. An arrayed light circulator according to claim 1, characterized in that the circulator core (3) comprises: a first beam splitter (311) and a second beam splitter (312), wherein:
the first beam splitter (311) and the second beam splitter (312) are arranged on two sides of the circulator core element (3), the first beam splitter (311) is arranged opposite to the first collimating array (1), and the second beam splitter (312) is arranged opposite to the second collimating array (2).
4. An arrayed light circulator according to claim 3, wherein the circulator core (3) further comprises: a first half-wave plate (321), a second half-wave plate (322), a third half-wave plate (323), a fourth half-wave plate (324), a first Faraday rotator (341), a second Faraday rotator (342), a first wedge (331), and a second wedge (332), wherein:
the first wedge-shaped piece (331) and the second wedge-shaped piece (332) are positioned in the middle of the circulator core piece (3), and the first wedge-shaped piece (331) and the second wedge-shaped piece (332) are in butt joint;
the first Faraday rotation plate (341) is arranged between the first wedge plate (331) and the first beam splitter (311), and the second Faraday rotation plate (342) is arranged between the second wedge plate (332) and the second beam splitter (312);
the first half-wave plate (321) and the second half-wave plate (322) are arranged oppositely, and the first half-wave plate (321) and the second half-wave plate (322) are arranged between the first half-wave plate (321) and the first Faraday rotator (341) and the first beam splitter (311);
the third half-wave plate (323) and the fourth half-wave plate (324) are arranged opposite to each other, and the third half-wave plate (323) and the fourth half-wave plate (324) are arranged between the second half-wave plate (322) and the second Faraday rotator (342) and the second beam splitter (312).
5. The array optical circulator of claim 4, wherein the circulator core (3) further comprises a magnetic ring (35), the magnetic ring (35) housing the first beam splitter (311), the second beam splitter (312), the first half-wave plate (321), the second half-wave plate (322), the third half-wave plate (323), the fourth half-wave plate (324), the first faraday rotator (341), the second faraday rotator (342), the first wedge (331) and the second wedge (332).
6. The array optical circulator of claim 4, wherein the first beam splitter (311), the second beam splitter (312), the first faraday rotator (341), the second faraday rotator (342), the first wedge (331) and the second wedge (332) are disposed on the same axis, the first half-wave plate (321) and the second half-wave plate (322) are symmetrically disposed on both sides of the axis, and the third half-wave plate (323) and the fourth half-wave plate (324) are also symmetrically disposed on both sides of the axis.
7. The arrayed light circulator of claim 4, wherein an incident angle of the first beam splitter (311) and the second beam splitter (312) is set to an arbitrary angle not parallel to a main light path;
an included angle between the optical axis of the first half-wave plate (321) and the optical axis of the second half-wave plate (322) is set to 135 degrees or 45 degrees; an included angle between an optical axis of the third half-wave plate (323) and an optical axis of the fourth half-wave plate (324) is set to 135 degrees or 45 degrees;
the optical axis of the first beam splitter (311) and the optical axis of the second beam splitter (312) are arranged parallel to each other.
8. The array optical circulator according to any one of claims 1 to 7, wherein the array of the optical fiber heads of the first collimating array (1) is an nxm array and the array of the optical fiber heads of the second collimating array (2) is an (N/2) xm array.
9. The array optical circulator according to any one of claims 1 to 7, wherein the array of optical fiber heads is a linear array in the first collimating array (1) and the second collimating array (2).
10. The array optical circulator according to any one of claims 1 to 7, wherein the optical fiber heads in the first collimating array (1) and the second collimating array (2) are optical fiber heads which are not subjected to a beam expanding treatment.
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