CN110412772A - A kind of optical circulator - Google Patents
A kind of optical circulator Download PDFInfo
- Publication number
- CN110412772A CN110412772A CN201810401784.7A CN201810401784A CN110412772A CN 110412772 A CN110412772 A CN 110412772A CN 201810401784 A CN201810401784 A CN 201810401784A CN 110412772 A CN110412772 A CN 110412772A
- Authority
- CN
- China
- Prior art keywords
- pbs
- combined prism
- faraday rotator
- light
- pbs combined
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
Abstract
The invention discloses a kind of optical circulators, including the first PBS combined prism being set in sequence along optical path, Faraday rotator and the 2nd PBS combined prism, the PBS that the first PBS combined prism is oppositely arranged by two is formed, the 2nd PBS combined prism is oppositely arranged by PBS and high reflective mirror or a PBS, half-wave plate is additionally provided between the first PBS combined prism and Faraday rotator or between Faraday rotator and the 2nd PBS combined prism, the structure forms 3 ports, wherein, the light of port 1 is exported after optical circulator by port 2, the light of port 2 is exported after circulator by port 3, the present invention program is designed using free space micro-optics principle, component number is few, it is simple and compact for structure, it is easily integrated one, it can be widely applied to height In fast optical transceiver module, have a good application prospect.
Description
Technical field
The present invention relates to optical communication device field, especially a kind of optical circulator.
Background technique
Optical circulator is the important optical passive component in optical communication field, and traditional fiber optical circulator mainly uses birefringent crystalline substance
Body is as beam splitter, due to the light splitting limited angle of birefringece crystal, so that the length of birefringece crystal is generally partially long, simultaneously
Due to circulator structures complexity, number of elements is numerous, so that traditional circulator volume is relatively large, is difficult circulator and its
Its optical device or module are integrated together, and are generally used as individual optical device and other optical devices or module and are connected by optical fiber
It connects, so that the huge structure and complexity of entire optical fiber link.
Recently as the increasingly developed of communication field, the optical device and module number for needing to use are more and more, light device
The integration and miniaturization of part becomes inevitable trend, especially in High Speeding Optical Transmitter-receiver Circuit, in order to reduce the complexity of link
Property, need to be realized the transfer function of single fiber bi-directional with optical circulator, since optical module is large number of, external fiber optical circulator is not only
It will increase biggish volume, cost is also higher.
Summary of the invention
The case where for the prior art, it is simple, small in size and be easily integrated that the purpose of the present invention is to provide a kind of structures
It is assembled to the optical circulator of the free space inside optical module.
In order to realize above-mentioned technical purpose, the technical solution adopted by the present invention are as follows:
A kind of optical circulator comprising the first PBS combined prism, Faraday rotator and the 2nd PBS being set in sequence along optical path
Combined prism, the PBS that the first PBS combined prism is oppositely arranged by two are formed, the 2nd PBS combined prism by
One PBS and high reflective mirror or a PBS are oppositely arranged, the first PBS combined prism and Faraday rotator
Between or Faraday rotator and the 2nd PBS combined prism between be additionally provided with half-wave plate.
Further, the first PBS combined prism, Faraday rotator, half-wave plate and the 2nd PBS combined prism be according to
Sequence setting.
Further, the first PBS combined prism, half-wave plate, Faraday rotator and the 2nd PBS combined prism be according to
Sequence setting.
Further, 45 ° of the polarization direction rotation for the light that the Faraday rotator is used to pass through from it, described half
The optical axis of wave plate and the angle of side are 22.5 or 67.5 degree, are set as needed, and light polarization direction is also rotated 45 by it
Degree.
Further, the polarization direction for the light that the half-wave plate is used to pass through from it rotates 45 °.
Further, structure of the invention forms three-port circulator, and the incident light of middle port 1 is single linearly polarized light, end
The incident light of mouth 2 does not limit polarization state.
Further, the Faraday rotator is latching type Faraday rotator.
Further, the Faraday rotator is non-latching type Faraday rotator, the non-latching
One or more magnetic patch or magnet ring are provided on the outside of type Faraday rotator.
Further, the first PBS combined prism, Faraday rotator, half-wave plate and the 2nd PBS combined prism are deep
Change optical cement to be connected as one.
Further, the first PBS combined prism, Faraday rotator, half-wave plate and the 2nd PBS combined prism are glue
Close be connected as one and gluing used in refractive index and the refractive index of corresponding mating surface of glue match correspondence.
Using above-mentioned structure, compared with prior art, optical path of the invention is simple, it is compact-sized, be easily assembled, not only
There is good optical property, and be able to achieve low cost, in addition, can integrate and be assembled to due to volume very little of the present invention
Space and the cost of module-external connection circulator are saved inside optical module.
Detailed description of the invention
The present invention is further elaborated with reference to the accompanying drawings and detailed description:
Fig. 1 is that the implementation structure of optical circulator embodiment 1 of the present invention and its forward direction pass light schematic diagram；
Implementation structure and its reversed biography light schematic diagram of the Fig. 2 for optical circulator embodiment 1 of the present invention；
Fig. 3 is the schematic three dimensional views when implementation structure of optical circulator embodiment 1 of the present invention is combined as a whole；
Fig. 4 is that the implementation structure of optical circulator embodiment 2 of the present invention and its forward direction pass light schematic diagram；
Implementation structure and its reversed biography light schematic diagram of the Fig. 5 for optical circulator embodiment 2 of the present invention；
Fig. 6 is a wherein application schematic diagram for optical circulator of the present invention.
Specific embodiment
Embodiment 1
As shown in the figures 1 and 2, the present embodiment includes the first PBS combined prism 10, the Faraday rotator being set in sequence along optical path
11, half-wave plate 12 and the 2nd PBS combined prism 13, the first PBS combined prism 10 by two PBS101 being oppositely arranged,
102 compositions, the 2nd PBS combined prism 13 be oppositely arranged by PBS131 and high reflective mirror 132 or a PBS and
It is formed at, the present embodiment structure for inputting or three ports of output light, port 1 respectively shown in fig. 1 or fig. 2, port 2
With port 3.
Fig. 1 shows the positive of the present embodiment and passes light light path schematic diagram, the single linearly polarized light (P light) incident from port 1
Enter Faraday rotator 11 after the PBS101 of the first PBS combined prism 10, Faraday rotator 11 is inclined by incident P light
Vibration direction rotates 45 degree and enters half-wave plate 12, and half-wave plate 12 along reversely rotating 45 degree, enters the polarization direction of incident light in this way
Light is penetrated before entering the 2nd PBS combined prism 13 and has become P light again, from end after the PBS131 of the 2nd PBS combined prism 13
Mouth 2 is emitted.
Fig. 2 shows the reversed biography light light path schematic diagram of the present embodiment, the backward beam (P Guang &S light) incident from port 2
P light and S light are separated after the PBS131 of the 2nd PBS combined prism 13, P light level is transferred into half-wave plate 12, half-wave plate
12 will enter Faraday rotator 11 after 45 degree of light polarization rotation, and Faraday rotator 11 is by incident light polarization state along half-wave
45 degree of rotation is continued in the identical direction of rotation of piece 12, and such light beam becomes S light before entering the first PBS combined prism 10, the S
Light is reflected to PBS102 after entering PBS101, exports after PBS102 reflects from port 3.The backward beam S incident from port 2
Light is reflected to PBS or high reflection mirror 132 after the PBS131 of the 2nd PBS combined prism 13, and S light is through PBS or high reflection mirror
Half-wave plate 12 is transferred into after 132 reflections, half-wave plate 12 enters Faraday rotator 11, method after light polarization is rotated 45 degree
Draw rotator 11 that incident light polarization state is continued 45 degree of rotation along the identical direction of rotation of half-wave plate 12, such light beam is entering
Become P light before first PBS combined prism 10, transmission is exported from port 3 after which enters PBS102.It is incident from port 2 in this way
Backward beam (P Guang &S light) after optical circulator from port 3 export.
Wherein, in the implementation structure (Fig. 1 or Fig. 2) of the present embodiment, the position of Faraday rotator 11 and half-wave plate 12 can
Mutually to turn (i.e. the position of Faraday rotator 11 and half-wave plate 12 can be exchanged), the optical axis of half-wave plate 12 and the angle of side are
It 22.5 or 67.5 degree, is set as needed, light polarization direction is also rotated 45 degree by it.
Fig. 3 is schematic three dimensional views when the present embodiment implementation structure is combined as a whole, and passes through in-depth optical cement or light refraction
Rate matching glue can connect the first PBS combined prism 10, Faraday rotator 11, half-wave plate 12 and the 2nd PBS combined prism 13
It is connected together to form an assembly, forms a compact structure, further, the first PBS combined prism 10, Faraday rotation
When device 11, half-wave plate 12 and the 2nd PBS combined prism 13 are connected as one for gluing, the refractive index of glue used in gluing is tied with corresponding
The refractive index for closing surface matches correspondence.
Embodiment 2
As shown in fig. 4 or 5, the present embodiment includes the first PBS combined prism 20, the Faraday rotator being set in sequence along optical path
21, half-wave plate 22 and the 2nd PBS combined prism 23, the first PBS combined prism 20 by two PBS201 being oppositely arranged,
202 compositions, the 2nd PBS combined prism 23 be oppositely arranged by PBS231 and high reflective mirror 232 or a PBS and
At the formation of the present embodiment structure is used to input or three ports of output light, respectively Fig. 4 or port shown in fig. 51, port 2
With port 3.
Fig. 4 shows the positive biography light schematic diagram that the present embodiment implements structure, the single linearly polarized light (P incident from port 1
Light) enter Faraday rotator 21 after the PBS201 of the first PBS combined prism 20, Faraday rotator 21 is by incident P
Light polarization direction rotates 45 degree and enters half-wave plate 22, and the polarization direction of incident light is rotated 45 by half-wave plate 22 in same direction
Degree, such incident light enter the 2nd PBS combined prism 23 before become S light, by the 2nd PBS combined prism 23 PBS or
Enter PBS232 after high reflection mirror 231, which is emitted after PBS232 reflects from port 2.
Fig. 5 is the reversed biography light schematic diagram that the present embodiment implements structure, the backward beam (P Guang &S light) incident from port 2
Say that P light and S light separate after the PBS232 of the 2nd PBS combined prism 23, P light level is transferred into half-wave plate 22, half-wave plate
22 will enter Faraday rotator 21 after 45 degree of light polarization rotation, and Faraday rotator 21 is by incident light polarization state along half-wave
The opposite direction of piece 22 rotates 45 degree, and such light beam remains as P light before entering the first PBS combined prism 20, which enters
It is transmitted after PBS201 and is exported from port 3.The backward beam S light incident from port 2 is by the 2nd PBS combined prism 23
PBS or high reflection mirror 231 are reflected to after PBS232, S light is transferred into half-wave plate 22 after PBS or high reflection mirror 231 reflect,
Half-wave plate 22 will light polarization rotate 45 degree after into Faraday rotator 21, Faraday rotator 21 is by incident light polarization state
45 degree are rotated along the opposite direction of half-wave plate 22, such light beam remains as S light before entering the first PBS combined prism 20, the S
Light is reflected into PBS202 after entering PBS201, exports after PBS202 reflects from port 3.In this way from 2 incidence of port
Backward beam (P Guang &S light) is exported from port 3 after optical circulator.
Wherein, in the implementation structure (Fig. 4 or Fig. 5) of the present embodiment, the position of Faraday rotator 21 and half-wave plate 22 can
To exchange, the optical axis of half-wave plate 22 and the angle of side are 22.5 or 67.5 degree, are set as needed, it is also by light polarization
Direction rotates 45 degree, can be by way of in-depth optical cement or light refractive index match glue by the first PBS combined prism 20, farad
Rotator 21, half-wave plate 22 and the 2nd PBS combined prism 23 are joined together to form an assembly, formed one it is compact
Structure, the first PBS combined prism 20, Faraday rotator 21, half-wave plate 22 and the 2nd PBS combined prism 23 are connected as gluing
It is integrally that refractive index and the refractive index of corresponding mating surface of glue used in gluing match correspondence.
In addition, the Faraday rotator 21 can be latching type Faraday rotator or non-latching type method
Draw rotator, wherein one or more magnetic patch or magnet ring are provided on the outside of non-latching type Faraday rotator, to provide
Required magnetic field.
Embodiment 3
Fig. 6 is optical circulator Application Example schematic diagram of the present invention, and optical circulator of the present invention can be applied to list
In the optical module of fine transmitted in both directions, which includes laser (LD) array or discrete lasers group 30, wavelength division multiplexer (MUX)
31, optical circulator 32 of the invention, optical interface 33, Wave decomposing multiplexer (DEMUX) 34, photodetector (PD) array or discrete
Photodetector group 35 and shell 36；The working principle of the module is: multipath light signal via laser array or it is discrete swash
Light device group 30 issues, and per a laser, the corresponding wavelength of each laser is corresponded to all the way, the multiple signals of different wave length are passed through
Wavelength division multiplexer 31 has synthesized signal all the way, and then the signal is inputted via the port 1 of optical circulator 32 of the invention, from port
It is exported after 2 outputs from the optical interface 33 of module.On the other hand, the signal of the multi-wavelength of input is inputted through the optical interface 33 of module,
Port 2 through optical circulator 32 enters, and is output and then enter Wave decomposing multiplexer 34 from port 3, Wave decomposing multiplexer 34 will be each
The signal of road corresponding wavelength is transferred to photodetector array or each the corresponding photodetection of discrete photodetector group 35
In device.The transmitted in both directions function that module optical signal is thus realized with single optical interface, due to optical circulator of the invention
32 is simple and compact for structure, is desirably integrated into optical module, is assembled to the inside of optical module shell 36, realizes the small-sized of optical module
Change.
It should be noted that the deformation and change of embodiments disclosed herein be it is possible, for those this fields
The replacement of embodiment and equivalent various parts are well known for those of ordinary skill.It should be clear to a person skilled in the art that
Be, without departing from the spirit or essential characteristics of the invention, the present invention can in other forms, structure, arrangement, ratio
To realize.
Claims (9)
1. a kind of optical circulator, it is characterised in that: it includes the first PBS combined prism being set in sequence along optical path, faraday's rotation
Turning device and the 2nd PBS combined prism, the PBS that the first PBS combined prism is oppositely arranged by two is formed, and described second
PBS combined prism is oppositely arranged by PBS and high reflective mirror or a PBS, the first PBS combined prism with
Half-wave plate is additionally provided between Faraday rotator or between Faraday rotator and the 2nd PBS combined prism.
2. a kind of optical circulator according to claim 1, it is characterised in that: the first PBS combined prism, faraday
Rotator, half-wave plate and the 2nd PBS combined prism are to be set in sequence.
3. a kind of optical circulator according to claim 1, it is characterised in that: the first PBS combined prism, half-wave
Piece, Faraday rotator and the 2nd PBS combined prism are to be set in sequence.
4. a kind of optical circulator according to claim 1, it is characterised in that: the Faraday rotator is used for will be from it
By light polarization direction rotate 45 °.
5. a kind of optical circulator according to claim 1, it is characterised in that: the half-wave plate is used to pass through from it
The polarization direction of light rotates 45 °.
6. a kind of optical circulator according to claim 1, it is characterised in that: the Faraday rotator is latching
Type Faraday rotator.
7. a kind of optical circulator according to claim 1, it is characterised in that: the Faraday rotator is non-
Latching type Faraday rotator, the non-latching type Faraday rotator outside are provided with one or more magnetic patch
Or magnet ring.
8. a kind of optical circulator according to claim 1, it is characterised in that: the first PBS combined prism, faraday
Rotator, half-wave plate and the 2nd PBS combined prism are that in-depth optical cement is connected as one.
9. a kind of optical circulator according to claim 1, it is characterised in that: the first PBS combined prism, faraday
Rotator, half-wave plate and the 2nd PBS combined prism be gluing be connected as one and gluing used in glue refractive index with it is corresponding combination
The refractive index on surface matches correspondence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810401784.7A CN110412772A (en) | 2018-04-28 | 2018-04-28 | A kind of optical circulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810401784.7A CN110412772A (en) | 2018-04-28 | 2018-04-28 | A kind of optical circulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110412772A true CN110412772A (en) | 2019-11-05 |
Family
ID=68357098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810401784.7A Pending CN110412772A (en) | 2018-04-28 | 2018-04-28 | A kind of optical circulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110412772A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110824733A (en) * | 2019-11-18 | 2020-02-21 | 昂纳信息技术（深圳）有限公司 | Optical circulator |
-
2018
- 2018-04-28 CN CN201810401784.7A patent/CN110412772A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110824733A (en) * | 2019-11-18 | 2020-02-21 | 昂纳信息技术（深圳）有限公司 | Optical circulator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7031574B2 (en) | Plug-in module for providing bi-directional data transmission | |
| CN108873199B (en) | Single-fiber bidirectional converter structure | |
| CN207051530U (en) | A kind of optical circulator and OTDR optical module | |
| CN110554463B (en) | Optical integration device and circulator | |
| JP7169708B2 (en) | Single core bi-directional optical transceiver assembly | |
| CN104656286A (en) | Miniature identical-wavelength single-core two-way optical transceiver module | |
| CN104459904A (en) | Single-fiber bidirectional BOSA structure | |
| US7039278B1 (en) | Single-fiber bi-directional transceiver | |
| CN105891956B (en) | Reflective optical circulator array | |
| WO2023236679A1 (en) | Optical transceiving module | |
| CN104391361A (en) | Single-fiber bidirectional receiving and transmitting module component | |
| CN208795949U (en) | A kind of optical circulator | |
| CN211603625U (en) | Small-sized integrated optical assembly for high-speed BOSA device | |
| CN215297755U (en) | Four-port circulator for single-fiber bidirectional communication and optical module | |
| CN112799185A (en) | Four-port circulator for single-fiber bidirectional communication and optical module | |
| CN204331200U (en) | Miniature co-wavelength uni-core bidirectional optical transceiver module | |
| CN110412772A (en) | A kind of optical circulator | |
| CN110412780A (en) | A kind of integrated free space optical circulator | |
| CN111856655B (en) | High-isolation polarization-independent micro free space circulator | |
| CN102937753A (en) | Optical isolator and optical assembly comprising same | |
| JPH03144602A (en) | Two-way light emission and reception module | |
| CN110462491B (en) | Low-crosstalk single-core bidirectional optical assembly | |
| CN217156860U (en) | Wavelength division multiplexing single-fiber bidirectional optical transceiver | |
| CN208984906U (en) | A kind of integrated free space optical circulator | |
| CN216696770U (en) | Four-port annular core and silicon light coherent BIDI optical module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |