CN110531465B - Optical circulator and single-fiber bidirectional optical module - Google Patents
Optical circulator and single-fiber bidirectional optical module Download PDFInfo
- Publication number
- CN110531465B CN110531465B CN201810504334.0A CN201810504334A CN110531465B CN 110531465 B CN110531465 B CN 110531465B CN 201810504334 A CN201810504334 A CN 201810504334A CN 110531465 B CN110531465 B CN 110531465B
- Authority
- CN
- China
- Prior art keywords
- beam splitter
- polarization
- polarization beam
- port
- optical
- 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.)
- Active
Links
Images
Classifications
-
- 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
- G02B6/2746—Optical coupling means with polarisation selective and adjusting means comprising non-reciprocal devices, e.g. isolators, FRM, circulators, quasi-isolators
-
- 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
- G02B6/2766—Manipulating the plane of polarisation from one input polarisation to another output polarisation, e.g. polarisation rotators, linear to circular polarisation converters
-
- 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
-
- 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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4287—Optical modules with tapping or launching means through the surface of the waveguide
Abstract
The invention provides an optical circulator which comprises a collimating lens, a Faraday rotator, a first port, a second port, a third port, a first polarization beam splitter, a second polarization beam splitter, a third polarization beam splitter, a first polarization rotator and a second polarization rotator. Correspondingly, the invention also provides a single-fiber bidirectional optical module. The optical circulator provided by the invention has the advantages of small size, simple packaging, low cost and the like, and is easy to integrate with other photonic integrated devices on a large scale.
Description
Technical Field
The invention relates to an optical transceiver module in an optical fiber communication technology, in particular to an optical circulator and a single-fiber bidirectional optical module.
Background
In optical communication, optical signals need to be transmitted and received by optical fibers, and laying of long-distance optical fibers is a huge project. Generally, the same transmission distance requires two different optical fibers to transmit and receive optical signals, respectively. Despite the great amount of multiplexing research to increase the channel capacity of optical fiber to increase the utilization of optical fiber resources, it is far from keeping up with the huge demand of optical fiber resources for optical communication development.
The single-fiber bidirectional optical module can realize the receiving and transmitting of optical signals only by using one optical fiber, and half of optical fiber resources are saved. The traditional single-fiber bidirectional optical module utilizes a wavelength division multiplexing technology, different central wavelengths are needed to be used for sending and receiving optical signals in two directions, the module manufacturing difficulty is increased, and the technical cost is high. Further, it is considered that an optical circulator is used in a single-fiber bidirectional optical module, and the optical circulator is used for separating forward transmission optical signals and backward transmission optical signals in the same optical fiber, so as to implement transmission and reception of optical signals with the same central wavelength or different central wavelengths. Therefore, integrating optical circulators in optical devices and optical modules is a solution to effectively save fiber resources.
A general optical circulator has three ports, namely a first port, a second port and a third port, and its basic function is to realize transmission of optical signals from the first port to the second port, and signals from the second port cannot return to the first port, but can realize transmission from the second port to the third port. Optical circulators are fundamental devices in the fields of optical communications, optical sensing, and optical information processing, and have found very important applications in these fields. In the field of optical communication, the use of the optical circulator can also enable a common double-port optical transceiver module to realize single-optical-fiber bidirectional transmission.
The optical circulator in the prior art has the problems of large size, complex packaging, high cost and the like, and the reason is that the optical circulator in the prior art has a relatively complex internal structure, including a wave plate array or a birefringent crystal array, and is not beneficial to improving the integration level of the optical circulator.
Disclosure of Invention
In order to overcome the above-mentioned defects in the prior art, the present invention provides an optical circulator, which includes a collimating lens, a faraday rotator, a first port, a second port, a third port, a first polarization beam splitter, a second polarization beam splitter, a third polarization beam splitter, a first polarization rotator, and a second polarization rotator, wherein:
parallel polarized light incident from the first port sequentially passes through the third polarization beam splitter, the second polarization rotator, the collimating lens, the Faraday rotator, the collimating lens and the first polarization beam splitter to reach the second port;
the mixed polarized light incident from the second port enters the first polarization beam splitter and is decomposed into first polarized light and second polarized light which are perpendicular to each other, the first polarized light sequentially passes through the collimating lens, the Faraday rotator, the collimating lens, the second polarization rotator, the third polarization beam splitter and the second polarization beam splitter to reach the third port, and the second polarized light sequentially passes through at least the collimating lens, the Faraday rotator, the collimating lens, the first polarization rotator and the second polarization beam splitter to reach the third port.
According to one aspect of the invention, the optical circulator further includes a fourth polarizing beam splitter and a fifth polarizing beam splitter; the mixed polarized light incident from the first port enters the third polarization beam splitter and is decomposed into third polarized light and fourth polarized light which are perpendicular to each other, the third polarized light sequentially passes through the fifth polarization beam splitter, the second polarization rotator, the collimating lens, the faraday rotator, the collimating lens and the first polarization beam splitter to reach the second port, and the fourth polarized light sequentially passes through the fourth polarization beam splitter, the first polarization rotator, the collimating lens, the faraday rotator, the collimating lens and the first polarization beam splitter to reach the second port.
According to another aspect of the present invention, the optical circulator is disposed on an integrated chip in any combination of the first polarization beam splitter, the second polarization beam splitter, the third polarization beam splitter, the fourth polarization beam splitter, the fifth polarization beam splitter, the first polarization rotator, and the second polarization rotator.
According to another aspect of the invention, four optical ports coupled with the collimating lens are arranged on the integrated chip in the optical circulator, and the four optical ports are arranged in central symmetry.
According to another aspect of the invention, the first port, the second port and the third port are disposed on the integrated chip.
According to another aspect of the invention, a mirror is arranged on the exit optical surface of the Faraday rotator, and the mirror is positioned on the focal plane of the collimating lens to form a telecentric stop system.
According to another aspect of the present invention, the reflecting mirror in the optical circulator is a reflecting film formed on the exit optical surface.
According to another aspect of the invention, the integrated chip in the optical circulator is a silicon-based integrated chip.
According to another aspect of the present invention, the optical polarization rotation angle of the first and second polarization rotators in the optical circulator is set to minus 45 degrees; the angle of rotation of the optical polarization of the faraday rotator is set to positive 22.5 degrees.
Correspondingly, the invention also provides a single-fiber bidirectional optical module, which comprises a light emitting device and a light receiving device, and further comprises the optical circulator, wherein the optical circulator is optically coupled with the light emitting device and the light receiving device.
The optical circulator provided by the invention depends on a reflection type light path formed by the collimating lens and the Faraday rotator, and combines three polarization beam splitters and two polarization rotators to realize the function of the optical circulator.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
FIG. 1 is a schematic structural diagram of one embodiment of an optical circulator according to the present invention;
FIG. 2 is a schematic structural diagram of a preferred embodiment of an optical circulator according to the present invention;
the same or similar reference numbers in the drawings identify the same or similar elements.
Detailed Description
For a better understanding and explanation of the present invention, reference will now be made in detail to the present invention as illustrated in the accompanying drawings. The present invention is not limited to these specific embodiments only. Rather, modifications and equivalents of the invention are intended to be included within the scope of the claims.
It should be noted that numerous specific details are set forth in the following detailed description. It will be understood by those skilled in the art that the present invention may be practiced without these specific details. In the following detailed description of various embodiments, structures and components well known in the art are not described in detail in order to not unnecessarily obscure the present invention.
Referring to fig. 1, a schematic structural diagram of an embodiment of an optical circulator according to the present invention includes a collimating lens 20, a faraday rotator 30, a first port 11, a second port 12, a third port 13, a first polarization beam splitter 101, a second polarization beam splitter 102, a third polarization beam splitter 103, a first polarization rotator 111, and a second polarization rotator 112. In addition, it should be noted that the dashed lines representing the optical signals in fig. 1 have different labels respectively, and are used to show the optical paths of various types of optical signals in the optical circulator. Wherein the dotted line corresponding to the reference numeral "1" refers to mixed polarized light in the waveguide, the dotted line corresponding to the reference numeral "2" refers to P polarized light in the waveguide, the dotted line corresponding to the reference numeral "3" refers to S polarized light in the waveguide, and the dotted line corresponding to the reference numeral "4" refers to mixed polarized light in free space.
Those skilled in the art will appreciate that the design of the optical circulator is intended to achieve that the optical signal injected into the optical circulator can enter from the first port 11 and then exit from the second port 12, and that the optical signal injected into the second port 12 exits from the third port 13.
When the optical signal entering the first port 11 is single-polarization P-ray, in the optical circulator provided in this embodiment, the parallel-polarization light (i.e., the single-polarization P-ray) incident from the first port 11 sequentially passes through the third polarization beam splitter 103, the second polarization rotator 112, the collimating lens 20, the faraday rotator 30, the collimating lens 20, and the first polarization beam splitter 101 to reach the second port 12, and specifically, the parallel-polarization light passing through the optical device forms a first optical path from the first port 11 to the second port 12.
The mixed polarized light (including P-polarized light and S-polarized light) incident from the second port 12 enters the first polarization beam splitter 101 and is split into first polarized light and second polarized light which are perpendicular to each other, specifically, for example, the first polarized light is P-polarized light and the second polarized light is S-polarized light. The first polarized light sequentially passes through the collimating lens 20, the faraday rotator 30, the collimating lens 20, the second polarization rotator 112, the third polarization beam splitter 103, and the second polarization beam splitter 102 to reach the third port 13, and the first polarized light passing through the optical device forms a second light path; the second polarized light sequentially passes through the collimating lens 20, the faraday rotator 30, the collimating lens 20, the first polarization rotator 111, and the second polarization beam splitter 102 to reach the third port 13, and the second polarized light passing through the optical device forms a third optical path. Since both the first polarized light and the second polarized light pass through the second polarization beam splitter 102, one of the functions of the second polarization beam splitter 102 is to perform polarization beam combination on the first polarized light and the second polarized light incident therein to obtain mixed polarized light, so that the optical signal emitted from the third port 13 is still mixed polarized light.
In more application scenarios, the optical signal entering the first port 11 may not only be single-polarization P light, but also mixed-polarization light. In order to make the mixed polarized light normally enter from the first port 11 and then exit from the second port 12, the internal structure of the optical circulator shown in fig. 1 needs to be expanded accordingly, and two polarization beam splitters may be added to the structure of the optical circulator shown in fig. 1. Referring to fig. 2, which is a schematic structural diagram of a preferred embodiment of the optical circulator according to the present invention, compared to the structure of the optical circulator shown in fig. 1, the optical circulator shown in fig. 2 further includes a fourth polarization beam splitter 104 and a fifth polarization beam splitter 105. The mixed polarized light entering from the first port enters the third polarization beam splitter and is split into third polarized light and fourth polarized light perpendicular to each other, specifically, for example, the third polarized light is P-polarized light, and the fourth polarized light is S-polarized light. The third polarized light sequentially passes through the fifth polarization beam splitter 105, the second polarization rotator 112, the collimating lens 20, the faraday rotator 30, the collimating lens 20, and the first polarization beam splitter 101 to reach the second port 12, and a fourth light path is formed by the third polarized light of the optical device; the fourth polarized light sequentially passes through the fourth polarization beam splitter 104, the first polarization rotator 111, the collimator lens 20, the faraday rotator 30, the collimator lens 20, and the first polarization beam splitter 101 to reach the second port 12, and a fifth light path is formed by the fourth polarized light passing through the optical device. Since both the third polarized light and the fourth polarized light pass through the fourth polarization beam splitter 104, one of the functions of the fourth polarization beam splitter 104 is to perform polarization beam combination on the third polarized light and the fourth polarized light incident therein to obtain mixed polarized light, so that the optical signal emitted from the second port 12 is still mixed polarized light.
In the first to fifth optical paths, in order to return the optical signal emitted from the collimator lens 20 to the collimator lens 20 after passing through the faraday rotator 30 and then passing through the faraday rotator 30 again, it is considered that an appropriate reflection optical device is disposed behind the faraday rotator 30. A mirror 31 is arranged, for example, on the exit optical face of the faraday rotator 30, which mirror 31 is typically located in the focal plane of the collimator lens 20 to form a telecentric stop system. For cost reduction and simplification of the structure, it is typically considered in a preferred embodiment that the reflecting mirror 31 is designed as a reflecting film formed on the exit optical surface.
In order to realize the first to fifth optical paths, it should be understood by those skilled in the art that suitable optical polarization rotation angles should be selected for the first polarization rotator 111, the second polarization rotator 112, and the faraday rotator 30. Typically, in the present embodiment, it is considered that the optical polarization rotation angle of the first polarization rotator 111 and the second polarization rotator 112 is set to negative 45 degrees, and the optical polarization rotation angle of the faraday rotator 30 is set to positive 22.5 degrees.
Based on the selected parameters, referring to fig. 1 and 2, the mixed polarized light composed of the P-polarized light and the S-polarized light entering from the first port 11 is divided into the P-polarized light and the S-polarized light after passing through the third polarization beam splitter 103, wherein the P-polarized light enters the fifth polarization beam splitter 105, and then enters the second polarization rotator 112 to implement-45 degree polarization rotation, and then is collimated after passing through the collimating lens 20, enters the faraday rotator 30 to generate +22.5 degree polarization rotation, and is reflected after reaching the mirror 31 to pass through the faraday rotator 30 again and generate +22.5 degree polarization rotation, so that the P-polarized light reaches the first polarization beam splitter 101 through the collimating lens 20; the S polarized light enters the fourth polarization beam splitter 104, and then enters the first polarization rotator 111 to realize-45 degree polarization rotation, and is collimated after passing through the collimating lens 20, enters the faraday rotator 30 to generate +22.5 degree polarization rotation, and is reflected after reaching the reflector 31 to pass through the faraday rotator 30 again and generate +22.5 degree polarization rotation, so that the S polarized light reaches the first polarization beam splitter 101 after passing through the collimating lens 20; the P-polarized light and the S-polarized light are polarized and combined by the first polarization beam splitter 101, and finally emitted from the second port 12.
The mixed polarized light composed of the P polarized light and the S polarized light entering from the second port 12 is divided into the P polarized light and the S polarized light after passing through the first polarization beam splitter 101, wherein the P polarized light is collimated after passing through the collimating lens 20, enters the faraday rotator 30 to undergo +22.5 degree polarization rotation, reaches the mirror 31, is reflected to pass through the faraday rotator 30 again and undergo +22.5 degree polarization rotation, then passes through the second polarization rotator 112 to undergo +45 degree polarization rotation to form the S polarized light, and reaches the second polarization beam splitter 102 through the fifth polarization beam splitter 105; the S polarized light is collimated after passing through the collimating lens 20, enters the Faraday rotator 30 to be subjected to + 22.5-degree polarization rotation, is reflected after reaching the reflector 31 to pass through the Faraday rotator 30 again and to be subjected to + 22.5-degree polarization rotation, is subjected to + 45-degree polarization rotation through the first polarization rotator 111 to form P polarized light, and reaches the second polarization beam splitter 102 through the fourth polarization beam splitter 104; the P-polarized light and the S-polarized light are polarized and combined by the second polarization beam splitter 102, and finally emitted from the second port 12.
With the development of processing technology, and in particular the advent of silicon photonics, it is preferably considered to integrate multiple optical devices in the optical circulator shown in fig. 1 or 2 using silicon photonics. Preferably, any combination of the first polarization beam splitter 101, the second polarization beam splitter 102, the third polarization beam splitter 103, the fourth polarization beam splitter 104, the fifth polarization beam splitter 105, the first polarization rotator 111 and the second polarization rotator 112 is disposed on the integrated chip 10. Further, it may also be preferable to provide the first port 11, the second port 12 and the third port 13 on the integrated chip 10. Even the collimator lens 20, the faraday rotator 30 and the mirror 31 are disposed on the integrated chip 10. Wherein the integrated chip 10 is a silicon-based integrated chip. The size of the optical circulator can be greatly reduced by the arrangement, so that the structure of the optical circulator is more compact, and the integration level of the optical circulator is improved.
In addition, the integrated chip 10 and the collimating lens 20 need to be optically coupled. For the coupling to be simple and convenient, the light ports of the integrated chip 10 coupled to the collimating lens 20 may be disposed on the same plane or even on the same straight line. The number of the optical ports coupled to the collimating lens 20 on the integrated chip 10 is 4, and the optical ports are arranged in a central symmetry manner. Therefore, at least part of interfaces are shared by the outgoing light and the incoming light, so that the cost is saved and the coupling difficulty is reduced.
Correspondingly, the invention also provides a single-fiber bidirectional optical module which comprises a light emitting device, a light receiving device and the optical circulator provided by the application. The optical circulator is applied to the single-fiber bidirectional optical module as a light guide unit, is optically coupled with the light emitting device and the light receiving device, and is favorable for improving the integration level of the single-fiber bidirectional optical module and saving the inner space of the single-fiber bidirectional optical module. The light emitting device and the light receiving device can be integrated on the integrated chip 10 of the optical circulator or can be separate devices.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are, therefore, to be considered as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it will be obvious that the term "comprising" does not exclude other elements, units or steps, and the singular does not exclude the plural.
It should be understood that although the present description refers to particular embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can be appropriately combined to form other embodiments understood by those skilled in the art.
The optical circulator provided by the invention depends on a reflection type light path formed by the collimating lens and the Faraday rotator, and combines three polarization beam splitters and two polarization rotators to realize the function of the optical circulator.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. An optical circulator comprising a collimating lens, a Faraday rotator, a first port, a second port, and a third port, further comprising a first polarization beam splitter, a second polarization beam splitter, a third polarization beam splitter, a first polarization rotator, and a second polarization rotator, wherein:
parallel polarized light incident from the first port sequentially passes through the third polarization beam splitter, the second polarization rotator, the collimating lens, the Faraday rotator, the collimating lens and the first polarization beam splitter to reach the second port;
the mixed polarized light incident from the second port enters the first polarization beam splitter and is decomposed into first polarized light and second polarized light which are perpendicular to each other, the first polarized light sequentially passes through the collimating lens, the Faraday rotator, the collimating lens, the second polarization rotator, the third polarization beam splitter and the second polarization beam splitter to reach the third port, and the second polarized light sequentially passes through at least the collimating lens, the Faraday rotator, the collimating lens, the first polarization rotator and the second polarization beam splitter to reach the third port.
2. The optical circulator of claim 1, wherein:
the optical circulator also comprises a fourth polarization beam splitter and a fifth polarization beam splitter;
the mixed polarized light incident from the first port enters the third polarization beam splitter and is decomposed into third polarized light and fourth polarized light which are perpendicular to each other, the third polarized light sequentially passes through the fifth polarization beam splitter, the second polarization rotator, the collimating lens, the faraday rotator, the collimating lens and the first polarization beam splitter to reach the second port, and the fourth polarized light sequentially passes through the fourth polarization beam splitter, the first polarization rotator, the collimating lens, the faraday rotator, the collimating lens and the first polarization beam splitter to reach the second port.
3. The optical circulator of claim 2, wherein:
any combination of the first polarization beam splitter, the second polarization beam splitter, the third polarization beam splitter, the fourth polarization beam splitter, the fifth polarization beam splitter, the first polarization rotator, and the second polarization rotator is disposed on an integrated chip.
4. The optical circulator of claim 3, wherein:
the integrated chip is provided with four optical ports coupled with the collimating lens, and the four optical ports are arranged in central symmetry.
5. The optical circulator of claim 3, wherein,
the first port, the second port, and the third port are disposed on the integrated chip.
6. The optical circulator of claim 1, wherein:
and a reflector is arranged on the emergent optical surface of the Faraday rotation piece and is positioned on the focal plane of the collimating lens to form a telecentric diaphragm system.
7. The optical circulator of claim 6, wherein:
the reflecting mirror is a reflecting film formed on the exit optical surface.
8. The optical circulator of claim 3 or 5, wherein:
the integrated chip is a silicon-based integrated chip.
9. The optical circulator of claim 1 or 2, wherein:
the optical polarization rotation angles of the first polarization rotator and the second polarization rotator are set to be minus 45 degrees;
the angle of rotation of the optical polarization of the faraday rotator is set to positive 22.5 degrees.
10. A single fiber bi-directional optical module, wherein:
the bi-directional optical fiber module includes a light emitting device and a light receiving device, and further includes an optical circulator as claimed in any one of claims 1 to 9, the optical circulator optically coupled to the light emitting device and the light receiving device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810504334.0A CN110531465B (en) | 2018-05-24 | 2018-05-24 | Optical circulator and single-fiber bidirectional optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810504334.0A CN110531465B (en) | 2018-05-24 | 2018-05-24 | Optical circulator and single-fiber bidirectional optical module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110531465A CN110531465A (en) | 2019-12-03 |
| CN110531465B true CN110531465B (en) | 2021-06-18 |
Family
ID=68656572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810504334.0A Active CN110531465B (en) | 2018-05-24 | 2018-05-24 | Optical circulator and single-fiber bidirectional optical module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110531465B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115857098B (en) * | 2023-03-02 | 2023-05-09 | 北京航空航天大学 | Optical circulator on silicon substrate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5593120A (en) * | 1979-01-09 | 1980-07-15 | Nippon Telegr & Teleph Corp <Ntt> | Light circulator |
| CN1291287A (en) * | 1998-10-21 | 2001-04-11 | 保尔·G·邓肯 | Optic measuring method and device using optic wave front polarized rotation of rare earth iron garnet |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09258136A (en) * | 1996-03-18 | 1997-10-03 | Fuji Elelctrochem Co Ltd | Optical circulator and optical switch |
| JPH10239638A (en) * | 1996-12-26 | 1998-09-11 | Nec Corp | Optical circulator |
| US6795242B2 (en) * | 2002-02-06 | 2004-09-21 | Lightwaves 2020, Inc. | Miniature circulator devices and methods for making the same |
| US6785431B2 (en) * | 2002-02-06 | 2004-08-31 | Lightwaves 2020, Inc. | Miniature circulator array devices and methods for making the same |
| CN100516980C (en) * | 2006-09-14 | 2009-07-22 | 武汉光迅科技股份有限公司 | Multiple port closed-circuit light circulator |
| US9625650B2 (en) * | 2014-08-13 | 2017-04-18 | Finisar Corporation | Optical circulators integrated into transceivers |
| CN105891956B (en) * | 2014-11-07 | 2023-07-25 | 江苏旭海光电科技有限公司 | Reflective optical circulator array |
-
2018
- 2018-05-24 CN CN201810504334.0A patent/CN110531465B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5593120A (en) * | 1979-01-09 | 1980-07-15 | Nippon Telegr & Teleph Corp <Ntt> | Light circulator |
| CN1291287A (en) * | 1998-10-21 | 2001-04-11 | 保尔·G·邓肯 | Optic measuring method and device using optic wave front polarized rotation of rare earth iron garnet |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110531465A (en) | 2019-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203422496U (en) | Transmitter wavelength division multiplexing optical structure and optical transmitter module | |
| CN104459904B (en) | A kind of single fiber bi-directional BOSA structure | |
| CN104950407B (en) | A kind of single fiber bi-directional BOSA structures | |
| US7031574B2 (en) | Plug-in module for providing bi-directional data transmission | |
| CN104656286B (en) | Miniature co-wavelength uni-core bidirectional optical transceiver module | |
| CN106908912B (en) | Single fiber bi-directional BOSA optical textures for high speed receive-transmit system | |
| CN204925459U (en) | Two -way light transceiver module of multi -wavelength single fiber | |
| CN217639658U (en) | Optical transceiver module | |
| CN110531465B (en) | Optical circulator and single-fiber bidirectional optical module | |
| CN110531469B (en) | Single-fiber bidirectional optical module | |
| CN104838605B (en) | Optical transceiver and method for processing optical signal | |
| CN204331200U (en) | Miniature co-wavelength uni-core bidirectional optical transceiver module | |
| CN112799185A (en) | Four-port circulator for single-fiber bidirectional communication and optical module | |
| CN110412780A (en) | A kind of integrated free space optical circulator | |
| CN111856655B (en) | High-isolation polarization-independent micro free space circulator | |
| CN217639632U (en) | Circulator and optical module | |
| US11346988B2 (en) | Miniaturized optical circulator | |
| US6954307B2 (en) | Four-port PM circulator | |
| CN214954206U (en) | Optical circulator and optical system | |
| CN204496045U (en) | A kind of array type optical isolator | |
| CN112198592B (en) | Optical system | |
| CN212905793U (en) | Integrated optical circulator | |
| CN208984906U (en) | A kind of integrated free space optical circulator | |
| CN109814284B (en) | Ultra-miniature optical circulator | |
| CN210072249U (en) | Miniature optical circulator |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Sun Yuzhou Inventor before: Sun Yu |