CN113156584A - Single-fiber bidirectional three-port circulator - Google Patents
Single-fiber bidirectional three-port circulator Download PDFInfo
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- CN113156584A CN113156584A CN202110397344.0A CN202110397344A CN113156584A CN 113156584 A CN113156584 A CN 113156584A CN 202110397344 A CN202110397344 A CN 202110397344A CN 113156584 A CN113156584 A CN 113156584A
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- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 2
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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
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29331—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by evanescent wave coupling
- G02B6/29335—Evanescent coupling to a resonator cavity, i.e. between a waveguide mode and a resonant mode of the cavity
- G02B6/29338—Loop resonators
-
- 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
- G02B6/2773—Polarisation splitting or combining
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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
- G02F1/095—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 in an optical waveguide structure
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a single-fiber bidirectional three-port circulator which comprises a trapezoidal polarization beam splitter prism, at least one Faraday magnetic rotation plate, at least one half-wave plate, a parallelogram polarization beam splitter prism and a magnet, wherein joint light-passing surfaces of the trapezoidal polarization beam splitter prism, the Faraday magnetic rotation plate, the half-wave plate and the parallelogram polarization beam splitter prism are all bonded with glue coating films to form a whole, and the whole is bonded on the magnet.
Description
Technical Field
The invention relates to the field of optical communication, in particular to a single-fiber bidirectional three-port circulator.
Background
The three-port circulator in the market generally adopts the magnetic ring assembly, all has the assembly gap between every crystal, and spare part is in large quantity, and assembly process is complicated, and the assembly degree of difficulty is higher, and the whole size of this type of project organization is difficult for reducing, and the interval of output and input is adjusted the difficulty, appears the error easily in the assembling process, and the light path is far away, and optical signal easily loses. In addition, in the prior art, the optical path coupling is performed by adhering the components to the third carrying platform, and the light-transmitting component has a gap in the middle, which has poor stability, poor performance, poor optical signal effect and high cost. And, wavelength division multiplexing filter is needed to be used for the prior WDM wavelength division multiplexing bid optical module, the WDM wavelength division multiplexing bid optical module must be used in pairs, and the operating wavelengths of the two WDM duplexers must be complementary and matched, which limits the use.
Disclosure of Invention
One advantage of the present invention is to provide a single-fiber bidirectional three-port circulator, wherein the circulator adopts a mode that an optical path has glue, and a light-passing surface is directly filled with glue, so that stability is good.
Another advantage of the present invention is to provide a single fiber, bidirectional three-port circulator in which the circulator is simplified in assembly, reduces the number of polarization splitting prisms, and achieves a compact design.
Another advantage of the present invention is to provide a single fiber bidirectional three-port circulator, wherein the circulator can be adapted to more products, has expanded applications, and can be applied to optical devices such as fiber optic circulators.
Another advantage of the present invention is to provide a single fiber, bi-directional three-port circulator wherein the circulator is assembled using magnetic plates, the plates are bonded to the sides, the magnetic plates and the crystal are filled with glue, and the crystal voids are filled.
Another advantage of the present invention is to provide a single fiber, bidirectional three-port circulator in which the circulator is capable of coating an adhesive.
Another advantage of the present invention is to provide a single fiber bidirectional three-port circulator, wherein the length of the polarization splitting prism of the circulator can be changed, so as to match the spacing between different chips, thereby better serving different needs of users.
To achieve the above object, the present invention provides a single-fiber bidirectional three-port circulator, comprising:
a trapezoidal polarization beam splitter prism;
at least one Faraday rotator plate;
at least one half-wave plate;
a polarization beam splitting prism assembly; and
and the joint light-passing surfaces of the trapezoidal polarization beam splitter prism, the Faraday magneto-rotation plate, the half-wave plate and the polarization beam splitter prism assembly are all bonded with the glue coating film to form a whole, and the whole is bonded on the magnetic block.
According to one embodiment of the present invention, the polarization splitting prism assembly includes two parallelogram polarization splitting prisms.
According to one embodiment of the invention, the polarization splitting prism assembly comprises two triangular polarization splitting prisms and one parallelogram polarization splitting prism.
According to one embodiment of the invention, the trapezoidal polarization beam splitter prism, the Faraday magnetic rotation plate, the half-wave plate and the joint light-passing surfaces of the two parallelogram polarization beam splitter prisms are bonded into a whole by adopting glue with matched refractive index, and the whole is bonded onto the magnetic block.
According to an embodiment of the invention, the number of the faraday magnetic rotation plates is two, the number of the half-wave plates is two, and the trapezoidal polarization beam splitter prism, the two faraday magnetic rotation plates, the two half-wave plates, the two triangular polarization beam splitters and the joint light-passing surfaces of the quadrangular polarization beam splitter prism are bonded into a whole by adopting glue with matched refractive index, and the whole is bonded onto the magnetic block.
According to an embodiment of the present invention, the trapezoidal polarization splitting prism includes a polarization splitting right-angle triangular prism and a polarization splitting parallelogram prism, wherein the polarization splitting right-angle triangular prism and the polarization splitting parallelogram prism are glued to form the trapezoidal polarization splitting prism.
According to one embodiment of the invention, the angle of rotation of the faraday magneto-rotation plate is 45 °.
According to one embodiment of the invention the optical axis of the half-wave plate is 22.5 °.
According to one embodiment of the invention, the bonding surface of the magnetic block is polished, and the effective magnetic field intensity of the magnetic block is 1000 gauss.
According to one embodiment of the invention, the material of the magnetic block is neodymium iron boron magnet or similar permanent magnet.
Additional advantages and features of the invention will be set forth in the detailed description which follows and in part will be apparent from the description, or may be learned by practice of the invention as set forth hereinafter.
Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.
These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, the accompanying drawings and the claims.
Drawings
Fig. 1 is a perspective view of a single fiber, bidirectional three-port circulator according to one embodiment of the invention.
FIG. 2 is a partial detail view of a trapezoidal polarization splitting prism of the single fiber, two-way, three-port circulator according to the above-described embodiment of the invention.
FIG. 3 is a partial detail view of a parallelogram-shaped polarizing beam splitting prism of the single fiber, two-way, three-port circulator according to the above-described embodiment of the invention.
Figure 4 is a partial detail view of the faraday rotator plate of the single fiber, two-way, three-port circulator according to the above-described embodiment of the invention.
FIG. 5 is a partial detail view of the half-wave plate of the single fiber two-way three-port circulator according to the above-described embodiment of the invention.
FIG. 6 is a partial detailed view of the magnetic block of the single fiber bidirectional three-port circulator according to the above-described embodiment of the invention.
Fig. 7 is an optical schematic of a single fiber bidirectional three-port circulator according to the above-described embodiment of the invention.
Fig. 8 is a perspective view of a single fiber, bidirectional three-port circulator according to another embodiment of the invention.
FIG. 9 is a partial detail view of a square polarizing beam splitter prism of the single fiber, two-way three-port circulator according to the above-described embodiment of the invention.
Fig. 10 is an optical schematic of a single fiber bidirectional three-port circulator according to the above-described embodiment of the invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
As shown in fig. 1, which is a schematic perspective view of a single-fiber bidirectional three-port circulator according to an embodiment of the present invention, the single-fiber bidirectional three-port circulator includes a trapezoidal polarization beam splitter prism 1, a faraday magnetic rotation plate 2, a half-wave plate 3, a parallelogram polarization beam splitter prism 4, and a magnet block 5, wherein all of the joint light-transmitting surfaces of the trapezoidal polarization beam splitter prism 1, the faraday magnetic rotation plate 2, the half-wave plate 3, and the parallelogram polarization beam splitter prism 4 are bonded with glue films or are bonded with glue with a matched refractive index to form an integral, and then the integral is bonded to the magnet block 5.
Further, index-matching glue refers to glue that matches the index of refraction of the bonding material, which is the same as the index of refraction of the bonding material, to reduce loss when light passes through. The elements are glued together using index matching glue and the insertion loss is very small. In detail, the light-passing surface glue coating film is bonded again or glue with matched refractive index is adopted, so that the bonding is seamless, the stability is good, the transmittance of an optical signal is increased, the optical path loss is small, the insertion loss optical performance is improved, the reflection of the optical signal to the light of the air output surface is reduced, the return loss optical performance is improved, and the whole volume is reduced.
As shown in fig. 2, which is a partial detail view of the trapezoidal polarization splitting prism 1 of the single fiber bidirectional three-port circulator according to the above embodiment of the present invention, the trapezoidal polarization splitting prism 1 includes a polarization splitting right-angle triangular prism and a polarization splitting parallelogram prism, the polarization splitting right-angle triangular prism and the polarization splitting parallelogram prism are formed by gluing, the trapezoidal polarization splitting prism 1 as shown has an S1 light passing surface, an S2 total reflection surface, an S3 light passing surface, an S4 gluing surface/PBS surface, an S5 light passing surface and an S6/S7 combined surface, the S6 and the S7 are combined to form a bottom surface glued surface, further, the S1, the S2, the S3, the S8, the S5, the S6 and the S7 are polished, the S3 and the S5 form a plane, the S1 and the S5 are parallel, the S2 is parallel to the S4 surface, the S4 is plated with a PBS film, the PBS film is a polarization splitting film, P light is transmitted, and S light is reflected, the multilayer dielectric film meets the Brewster condition, P is transmitted and S is reflected, the S1 is plated with an AR film on air, the S3 and the S5 are bonded with glue films or are bonded by adopting glue with matched refractive index, and the S6 and the S7 form a plane bottom surface to be bonded with the magnetic block 5.
As shown in fig. 3, a parallelogram polarization splitting prism 4 of the single-fiber bidirectional three-port circulator of the above embodiment of the present invention, the parallelogram polarization splitting prism 4 includes two polarization splitting parallelogram prisms, the two polarization splitting parallelogram prisms are glued to form the parallelogram polarization splitting prism 4, the parallelogram polarization splitting prism 4 includes an S1 light-passing surface, an S2 total reflection surface, an S3 light-passing surface, an S4 glue surface/PBS surface, an S5 light-passing surface, an S6 total reflection surface, an S7 light-passing surface, and an S8/S9 combined surface, the S8 and the S9 are combined to form a bottom surface, the S1, the S2, the S3, the S4, the S5, the S6, the S7, the S8, the S9 are polished, the S1 and the S7 form a plane, the S3 and the S5 form a plane, the S1 and the S7 are parallel to the S3 and the S5, the S2 is parallel to the S4 and the S6, the S4 is plated with a PBS (phosphate-buffered saline) film, the PBS film is a polarization splitting film, P light is transmitted, and S light is reflected, the multilayer dielectric film meets the Brewster condition, the P light is transmitted and S is reflected, the S2 and the S6 are plated with a total reflection film, the S3 and the S5 are plated with an AR (argon) film, the S1 and the S7 are bonded with glue films facing to the glue films or bonded with glue with matched refractive index, and the S8 and the S9 form a plane, and the bottom surface of the S8 and the magnetic block 5 are bonded.
As shown in fig. 4, a partial detail view of the faraday rotator 2 of the single fiber bidirectional three-port circulator according to the above embodiment of the present invention is shown, wherein the faraday rotator 2 has an S1 light passing surface, an S2, an S3 light passing surface and an S4 bottom surface bonding surface, the S1 and the S3 are bonded to the glue coating film or bonded by using a glue with matched refractive index, and the rotation angle of the faraday rotator 2 is: and 45 degrees, and the S4 is adhered to the magnetic block 5.
As shown in fig. 5, which is a partial detail view of the half-wave plate 3 of the single fiber bidirectional three-port circulator of the above embodiment of the present invention, wherein the half-wave plate 3 has an S1 light-passing surface, an S2, an S3 light-passing surface and an S4 bottom bonding surface, the S1 and the S3 are polished, the S2 and the S4 are ground, the S1 and the S3 are bonded again with a glue film or with a glue with a matched refractive index, and the optical axis: 22.5 degrees, and the bottom surface of the S4 is adhered to the magnetic block 5.
As shown in fig. 6, which is a partial detail view of the magnetic block 5 of the single fiber bidirectional three-port circulator of the above embodiment of the present invention, wherein the magnetic block 5 has an S1, an S2 bonding surface, an S3 and an S4 bonding surface, the S2 and the S4 are polished, ndfeb magnet or similar permanent magnet, effective magnetic field strength: 1000 gauss.
As shown in fig. 7, an optical schematic diagram of the single-fiber bidirectional three-Port circulator according to the above embodiment of the present invention includes an optical signal P light, an optical signal S light, a Port1, a Port2 and a Port3, the optical signal P light is incident to the Port2 from the Port1 optical transmission Port, the P light is transmitted through the S4 polarization splitting plane of the parallelogram polarization splitting prism 4, the optical signal is changed to be normal by the rotation of the half-wave plate 3 and the faraday magneto-rotation plate 2, the S light reaches the S2 total reflection plane of the trapezoidal polarization splitting prism 1 for reflection, and then reaches the S4 polarization splitting plane for reflection, and is output from the Port 2; if the optical signal P light is input from the Port2, the P light is transmitted through the S4 surface of the trapezoidal polarization beam splitter prism 1, passes through the Faraday magneto-rotation plate 2 and the half-wave plate 3, does not change the polarization state, reaches the S6 total reflection surface of the parallelogram beam splitter prism after being reflected, passes through the S4 polarization beam splitting surface, and then passes through the S2 total reflection surface to be reflected to reach the Port3, at this time, the optical signal can not be output from the Port 1; if the optical signal S light is incident from the Port2 optical transmission Port, the S light is reflected by the S4 polarization splitting surface of the trapezoidal polarization splitting prism 1, reaches the S2 total reflection surface of the trapezoidal polarization splitting prism, is reflected and exits from the S3 surface, passes through the faraday magneto-rotatory plate 2 and the half-wave plate 3, does not change the normal state, reaches the S4 polarization splitting surface of the parallelogram polarization splitting prism, is reflected, passes through the S2 total reflection surface, is reflected and is output from the Port3, and the optical signal cannot be output from the Port 1.
Further, the optical signal inputted from the Port2 can be outputted only from the Port3, but not from the Port1, thereby achieving the purpose of unidirectional transmission of the optical signal.
Further, the magnetic block 5 has a width of 3.20 mm, a length of 2.50 mm and a thickness of 0.80 mm.
Further, the size of the trapezoidal polarization beam splitter prism 1 is 0.60 mm in width, 1.20 mm in length on one side, 0.60 mm in length on the other side, and 0.65 mm in thickness.
Further, the size of the parallelogram polarization beam splitter prism 4 is 0.60 mm in width, 1.20 mm in length on one side, 1.20 mm in length on the other side, and 0.65 mm in thickness.
Further, the size of the optical rotation sheet 2 is 1.18 mm in width, 0.65 mm in length, and 0.6 mm in effective clear aperture.
Further, the half-wave plate 3 has the size of 1.20 mm in width, 0.65 mm in length and 0.6 mm in effective clear aperture.
In another embodiment of the present invention, only the differences between the present embodiment and the above-mentioned embodiments are described, and it should be noted that, only the differences between the present embodiment and the above-mentioned embodiments are described for brevity and understanding, and should not be construed as any limitation to the present invention.
As shown in fig. 8, the single-fiber bidirectional three-port circulator includes a trapezoidal polarization beam splitter prism 1, two faraday magnetic rotation plates 2A, two half-wave plates 3A, a square polarization beam splitter prism 4A and a magnet block 5, wherein the trapezoidal polarization beam splitter prism 1, the two faraday magnetic rotation plates 2A, the two half-wave plates 3A and the joint light-passing surface of the square polarization beam splitter prism 4 are all bonded to a glue coating film or are bonded to the magnet block 5 integrally by adopting glue with matched refractive index, and therefore, no separated gap exists, the loss of the light path is small, the assembly difficulty is small, the reliability and stability are good, and the overall size is reduced. In this embodiment, the magnetic field direction of the magnetic block 5 is opposite to the magnetic field direction of the magnetic block 5 of the previous embodiment.
As shown in fig. 9, which is a partial detail view of the square polarization splitting prism of the single fiber bidirectional three-port circulator of the above embodiment of the invention, wherein the square polarization splitting prism 4A is formed by gluing two polarization splitting right-angle triangular prisms and one polarization splitting parallelogram prism, as shown, the S1, S2, S3, S4, S5, S6, S7, S8, S9 faces are polished, the S1 and S6 are in a plane, the S3 and S5 are in a plane, the S1 and S6 are parallel to the S3 and S5 faces, the S2 is parallel to the S4 faces, the S2 and S4 faces are plated with PBS film, i.e., polarization splitting film, P light transmission, S light reflection, the multilayer dielectric film meets the Brewster condition, P is transparent and S is reverse, S3 and S5 face air to be coated with AR films, S1 and S6 face glue coating films to be bonded or are bonded by adopting glue with matched refractive index, and S7, S8 and S9 form a plane bottom surface to be bonded with the magnetic block 5.
Further, the magnetic block 5 has a width of 3.20 mm, a length of 2.50 mm and a thickness of 1.00 mm.
Further, in the present embodiment, the magnetic pole direction of the magnetic block 5 is opposite to the magnetic pole direction of the magnetic block 5 of the previous embodiment.
Further, the size of the trapezoidal polarization beam splitter prism 1 is 1.00 mm in width, 2.50 mm in length on one side, 1.50 mm in length on the other side, and 1.00 mm in thickness.
Further, the size of the quadrangular polarization splitting prism 4A is 1.00 mm in width, 2.50 mm in length, and 1.0 mm in thickness.
Further, the size of the optical rotation sheet 2A is 1.00 mm in width, 1.00 mm in length, and 0.8 mm in effective clear aperture.
Further, the half-wave plate 3A has a width of 1.00 mm, a length of 1.00 mm, and an effective clear aperture of 0.8 mm.
As shown in fig. 10, which is an optical schematic diagram of the single-fiber bidirectional three-Port circulator according to the above embodiment of the present invention, the optical signal P light is incident to the Port2 from the Port1 optical transmission Port, the P light is transmitted through the S4 polarization splitting plane of the square polarization splitting prism, passes through the half-wave plate 3A and the faraday magnetic rotation plate 2A, without changing the polarization state of the light, reaches the S4 polarization splitting plane of the trapezoidal polarization splitting prism 1, and is transmitted from the Port 2; if the P optical signal is input from the Port2 in reverse, after the P light is transmitted through the S4 polarization splitting plane of the trapezoidal polarization splitting prism 1, the polarization state is changed into S light by the rotation of the faraday magnetic rotation plate 2A and the half wave plate 3A, the S optical signal is reflected from the S4 polarization splitting plane of the square polarization splitting prism and then reaches the Port3 by the reflection of the S2 polarization splitting plane, and the optical signal cannot be output from the Port 1; if the optical signal S light is incident from the Port2 optical transmission Port, the S light is reflected by the S4 polarization splitting surface of the trapezoidal polarization splitting prism 1, then reflected by the S2 total reflection surface of the trapezoidal polarization splitting prism, and then emitted from the S3 surface, and then optically rotated by the faraday magnetic rotation plate 2A and the half-wave plate 3A, so as to change the polarization state of the light to P light, and the P light signal is transmitted by the S2 surface of the square polarization splitting prism, and output from the Port3, and the optical signal cannot be output from the Port 1.
Further, the optical signal inputted from the Port2 can be outputted only from the Port3, but not from the Port1, thereby achieving the purpose of unidirectional transmission of the optical signal.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.
Claims (9)
1. A single fiber, two-way, three-port circulator, comprising:
a trapezoidal polarization beam splitter prism;
at least one Faraday rotator plate;
at least one half-wave plate;
a polarization beam splitting prism assembly, wherein the polarization beam splitting prism assembly comprises two parallelogram polarization beam splitting prisms; and
and the joint light-passing surfaces of the trapezoidal polarization beam splitter prism, the Faraday magneto-rotation plate, the half-wave plate and the polarization beam splitter prism assembly are all bonded with the glue coating film to form a whole, and the whole is bonded on the magnetic block.
2. The single-fiber, two-way, three-port circulator of claim 1 wherein said polarization splitting prism assembly comprises two triangular polarization splitting prisms and one parallelogram polarization splitting prism.
3. The single-fiber bidirectional three-port circulator of claim 2, wherein said trapezoidal polarization beam splitter prism, said faraday rotator, said half-wave plate, and the coupling light-passing surfaces of said two parallelogram polarization beam splitter prisms are bonded together by an index-matching glue, and said whole is bonded to said magnetic block.
4. The single-fiber bidirectional three-port circulator of claim 3, wherein the number of the Faraday polarization plates is two, the number of the half-wave plates is two, and the joint light-passing surfaces of the trapezoidal polarization beam splitter prism, the two Faraday polarization plates, the two half-wave plates, the two triangular polarization beam splitter prisms and the parallelogram polarization beam splitter prism are bonded into a whole by using an index-matched glue, and the whole is bonded to the magnetic block.
5. The single fiber, two-way, three-port circulator of claim 4 or 5, wherein said trapezoidal polarization splitting prism comprises a polarization splitting right-angle triangular prism and a polarization splitting parallelogram prism, wherein said polarization splitting right-angle triangular prism and said polarization splitting parallelogram prism are glued to form said trapezoidal polarization splitting prism.
6. The single fiber, bidirectional three-port circulator of claim 6, wherein an angle of rotation of said faraday disk is 45 °.
7. The single fiber, bidirectional three-port circulator of claim 7, wherein an optical axis of the half-wave plate is 22.5 °.
8. The single fiber bidirectional three-port circulator of claim 8, wherein the bonding surface of the magnetic block is polished, and the effective magnetic field strength of the magnetic block is 1000 gauss.
9. The single fiber bidirectional three-port circulator of claim 9, wherein the magnetic block is made of neodymium iron boron magnet or similar permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110397344.0A CN113156584A (en) | 2021-04-14 | 2021-04-14 | Single-fiber bidirectional three-port circulator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110397344.0A CN113156584A (en) | 2021-04-14 | 2021-04-14 | Single-fiber bidirectional three-port circulator |
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| CN113156584A true CN113156584A (en) | 2021-07-23 |
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| CN202110397344.0A Pending CN113156584A (en) | 2021-04-14 | 2021-04-14 | Single-fiber bidirectional three-port circulator |
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Application publication date: 20210723 |