CN110908149A - Free space circulator - Google Patents
Free space circulator Download PDFInfo
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- CN110908149A CN110908149A CN201811081612.2A CN201811081612A CN110908149A CN 110908149 A CN110908149 A CN 110908149A CN 201811081612 A CN201811081612 A CN 201811081612A CN 110908149 A CN110908149 A CN 110908149A
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- 230000003287 optical effect Effects 0.000 claims abstract description 44
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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
- G02F1/093—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 used as non-reciprocal devices, e.g. optical isolators, circulators
-
- 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
- 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
- G02F1/0955—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 used as non-reciprocal devices, e.g. optical isolators, circulators
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
Abstract
The invention discloses a free space circulator, which comprises a first polarization beam splitting and combining prism, a first half wave plate, a second half wave plate, a first Faraday rotator, a second polarization beam splitting and combining prism, a second Faraday rotator, a third half wave plate, a fourth half wave plate and a third polarization beam splitting and combining prism which are sequentially arranged along an optical path, wherein the first polarization beam splitting and combining prism, the second polarization beam splitting and combining prism and the third polarization beam splitting and combining prism respectively comprise two polarization beam splitting prisms or one polarization beam splitting prism and a high reflecting mirror, the first polarization beam splitting and combining prism and the third polarization beam splitting and combining prism of the invention have the functions of splitting and combining light as the traditional birefringent crystal, but can realize the length shorter than the traditional birefringent crystal under the condition of realizing the same effect as the traditional birefringent crystal, have obvious advantages, and simultaneously, the second polarization splitting and combining prism can replace the traditional wedge angle pair to be used as a loop part, and the size of the circulator is further reduced.
Description
Technical Field
The invention relates to the field of optical communication devices, in particular to a free space circulator.
Background
The optical circulator is an important passive optical device in the field of optical communication, the conventional optical fiber circulator mainly adopts a birefringent crystal as a light splitting element, the length of the birefringent crystal is generally longer due to the limited light splitting angle of the birefringent crystal, and meanwhile, the conventional circulator has a relatively large volume due to the complex structure and numerous elements, so that the requirement of the optical element on increasing miniaturization in an optical communication network is difficult to meet.
In particular, in a high-speed optical transceiver module, in order to reduce the complexity of a link, an optical circulator needs to be used to realize a single-fiber bidirectional transmission function, and a conventional circulator is difficult to package and integrate into a housing of an optical module due to a large size and a large volume.
Disclosure of Invention
In view of the prior art, the present invention provides an optical circulator with reliable implementation, excellent performance and compact structure.
In order to achieve the technical purpose, the invention adopts the technical scheme that:
a free space circulator comprises a first polarization beam splitting and combining prism, a first half-wave plate, a second half-wave plate, a first Faraday rotator, a second polarization beam splitting and combining prism, a second Faraday rotator, a third half-wave plate, a fourth half-wave plate and a third polarization beam splitting and combining prism which are arranged along a light path in sequence, wherein the first polarization beam splitting and combining prism, the second polarization beam splitting and combining prism and the third polarization beam splitting and combining prism respectively comprise two polarization beam splitting prisms or a polarization beam splitting prism and a high reflecting mirror which are parallel to each other and divide an emergent surface and an incident surface into two parts, when light enters from one port of the first polarization beam splitting and combining prism, the light sequentially passes through the first half-wave plate, the second half-wave plate, the first Faraday rotator, the second polarization beam splitting and combining prism, the second Faraday rotator, the third half-wave plate and the fourth half-wave plate, and the light is output from one port of the third polarization beam splitting and combining prism, and conversely, the light is output from the other port of the first polarization beam splitting and combining prism after entering from the output port of the third polarization beam splitting and combining prism.
Further, the first half wave plate and the second half wave plate are fixedly connected and used for rotating the polarization direction of the passing light by 45 degrees, the first Faraday rotator is used for rotating the polarization direction of the passing light by 45 degrees, and the first half wave plate and the second half wave plate can be arranged in front of or behind the first Faraday rotator.
Further, the third half-wave plate and the fourth half-wave plate are fixedly connected and used for rotating the polarization direction of the passing light by 45 degrees, the second Faraday rotator is used for rotating the polarization direction of the passing light by 45 degrees, and the third half-wave plate and the fourth half-wave plate can be arranged in front of or behind the second Faraday rotator.
Further, the first Faraday rotator or/and the second Faraday rotator is/are latching type Faraday rotator.
Further, the first Faraday rotator or/and the second Faraday rotator is/are non-latching Faraday rotator, and one or more magnetic blocks or magnetic rings are arranged on the outer side of the non-latching Faraday rotator.
Furthermore, the first polarization beam splitting and combining prism, the first half-wave plate, the second half-wave plate, the first Faraday rotator, the second polarization beam splitting and combining prism, the second Faraday rotator, the third half-wave plate, the fourth half-wave plate and the third polarization beam splitting and combining prism are connected into a whole by deepening optical cement.
Furthermore, the first polarization light-splitting combination prism, the first half-wave plate, the second half-wave plate, the first Faraday rotator, the second polarization light-splitting combination prism, the second Faraday rotator, the third half-wave plate, the fourth half-wave plate and the third polarization light-splitting combination prism are glued and connected into a whole, and the refractive index of glue used for gluing is matched and corresponds to the refractive index of a corresponding joint surface.
By adopting the technical scheme, the invention has the beneficial effects that: although the first polarization beam splitting and combining prism and the third polarization beam splitting and combining prism of the scheme of the invention have the functions of splitting and combining light as the traditional birefringent crystal, under the condition that the effects of the first polarization beam splitting and combining prism and the second polarization beam splitting and combining prism are the same as those of the traditional birefringent crystal, the lengths of the first polarization beam splitting and combining prism and the second polarization beam splitting and combining prism are shorter than that of the traditional birefringent crystal, so that the advantages are obvious, and meanwhile, the second polarization beam splitting and combining prism can replace the traditional wedge angle pair to be used as a loop part, so that the size of the circulator is further reduced.
Drawings
The invention will be further elucidated with reference to the following description and embodiments in which:
fig. 1 is a side view of an optical circulator embodiment 1 of the present invention;
fig. 2 is a top view of an optical circulator 1 according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a change of polarization state of port 1 to port 2 optical transmission in embodiment 1 of the optical circulator of the present invention;
fig. 4 is a schematic diagram illustrating a change of polarization states of port 2 to port 3 optical transmissions according to embodiment 1 of the optical circulator of the present invention;
fig. 5 is a three-dimensional schematic diagram of the combined body of the embodiment 1 of the optical circulator of the invention;
fig. 6 is a side view of an optical circulator embodiment 2 of the present invention;
fig. 7 is a top view of an optical circulator embodiment 2 of the present invention;
fig. 8 is a schematic diagram illustrating a change of polarization state of port 1 to port 2 optical transmission in embodiment 2 of the optical circulator of the present invention;
fig. 9 is a schematic diagram illustrating a change of polarization states of port 2 to port 3 optical transmissions according to embodiment 2 of the optical circulator of the present invention;
fig. 10 is a three-dimensional schematic diagram of the combined body of the embodiment 2 of the optical circulator of the invention.
Detailed Description
Example 1
As shown in fig. 1 or 2, the optical circulator of the present invention includes a first polarization beam-splitting and combining prism 100, a first half-wave plate 101, a second half-wave plate 102, a first faraday rotator 103, a second polarization beam-splitting and combining prism 104, a third half-wave plate 105, a fourth half-wave plate 106, a second faraday rotator 107, and a third polarization beam-splitting and combining prism 108, which are sequentially disposed along an optical path, wherein each of the first polarization beam-splitting and combining prism 100, the second polarization beam-splitting and combining prism 104, and the third polarization beam-splitting and combining prism 108 may be formed by combining one polarization beam- splitting prism 100a, 104a, and 108a high reflection mirror 100b, 104b, and 108b, or by replacing the high reflection mirror 100b, 104b, and 108b with polarization beam-splitting prisms, the first half-wave plate 101 and the second half-wave plate 102 are fixedly connected to correspond to two end surfaces of the first polarization beam-splitting and combining prism 100a polarization beam-splitting prism 100a one by one, when light enters from one port of the first polarization beam splitting and combining prism 100, the light passes through the first half-wave plate 101, the second half-wave plate 102, the first faraday rotator 103, the second polarization beam splitting and combining prism 104, the second faraday rotator 105, the third half-wave plate 106 and the fourth half-wave plate 107 in sequence and is output through one port of the third polarization beam splitting and combining prism 108, and conversely, when light enters from one port of the third polarization beam splitting and combining prism 108, the light is output through the other port of the first polarization beam splitting and combining prism 100.
Although the first polarization splitting/combining prism 100 and the third polarization splitting/combining prism 108 perform the splitting and combining functions as a conventional birefringent crystal, the length of the polarization splitting/combining (PBS) prism is generally short, for example: the PBS combination prism with a length of 0.5mm can separate the P light and the S light by 0.5mm, whereas the conventional birefringent crystal (such as YVO 4) needs a length of 5mm to separate the O light and the E light by 0.5mm, so the length of the PBS combination prism has a significant advantage over the conventional birefringent crystal.
As can be seen from fig. 2, the second polarization splitting and combining prism 104, which is a loop portion of the optical circulator, can further reduce the size of the whole device compared to the conventional wedge angle pair.
With reference to fig. 1 or fig. 2, fig. 3 and fig. 4 are polarization state changes of the optical circulator of the present embodiment transmitted from port 1 to port 2 and from port 2 to port 3.
FIG. 3 is a schematic diagram illustrating polarization state changes of light transmitted from port 1 to port 2 of the optical circulator of the present invention, ① shows polarization directions of P light and S light after the incident light passing through port 1 passes through a first PBS (polarization splitting light) combining prism 100, the two polarization states are orthogonal to each other, ② shows polarization directions of the two polarization states after the two light passes through a first half-wave plate 101 and a second half-wave plate 102, the two light is rotated 45 degrees in opposite directions and then becomes light in the same polarization direction, ③ shows polarization directions of the two polarization states after the two light passes through a first Faraday rotator 103, the two light both become light in vertical polarization direction after rotating 45 degrees in counterclockwise direction, ④ shows polarization directions of the two light after passing through a second PBS (polarization splitting light) combining prism 104 and remaining in vertical polarization direction, ⑤ shows polarization directions of the two light in vertical polarization states after passing through a second Faraday rotator 105, the two light in horizontal polarization states rotate 45 degrees in counterclockwise direction, ⑥ shows polarization directions of the two light passing through a third PBS 106 and a fourth half-wave plate 106, and after the two light passes through a second Faraday rotator 107 and after the two light passes through the second PBS and the last polarization state, the two light passes through the second PBS and the second Faraday polarization state, and the two light passes through the second PBS 108, and the last polarization state, and the two light passes through the second PBS, and the polarization.
FIG. 4 is a schematic diagram showing the polarization state change of the optical circulator from port 2 to port 3, ⑥ is the polarization directions of the P light and the S light after the incident light from port 2 passes through the third PBS (polarized light splitting) combination prism 108, the two polarization states are mutually orthogonal, ⑤ is the polarization state direction of the two polarized light after passing through the third half-wave plate 106 and the fourth half-wave plate 107, the two light are changed into the light with the same polarization direction after rotating 45 degrees in opposite directions, ④ is the polarization state direction of the two polarized light after passing through the second Faraday rotator 105, the two light are changed into the light with the horizontal polarization direction after rotating 45 degrees in counterclockwise direction, ③ is the polarization state direction of the two light after passing through the second PBS (polarized light) combination prism 104, the two light are still in the horizontal polarization direction, ② is the polarization state direction of the two light with the two horizontal polarization states after passing through the first Faraday rotator 103, the two light with the horizontal polarization states are rotated 45 degrees in counterclockwise direction, ① is the two light after passing through the PBS and the second half-wave plate 101 and the second light after passing through the first half-wave plate 102, the two light are changed into the light with the polarization state of the polarization state after passing through the first PBS 100, and the two light after passing through the two light are combined in counterclockwise direction, and the first light with the.
The first faraday rotator 103 and the second faraday rotator 105 may be latching type faraday rotators or non-latching type faraday rotators, and when the faraday rotator is a non-latching type faraday rotator, one or more magnetic blocks or magnetic rings are arranged outside the faraday rotator.
Fig. 5 is a three-dimensional schematic diagram of the combined body of this embodiment, and the first polarization splitting and combining prism 100, the first half-wave plate 101, the second half-wave plate 102, the first faraday rotator 103, the second polarization splitting and combining prism 104, the second faraday rotator 105, the third half-wave plate 106, the fourth half-wave plate 107, and the third polarization splitting and combining prism 108 may be connected together by deepening optical cement or optical refractive index matching cement to form a combined body, so as to form a compact structure.
Example 2
As shown in fig. 6 or 7, the optical circulator of the present embodiment has a structure substantially the same as that of embodiment 1, wherein the first polarization splitting/combining prism 200, the first half-wave plate 201, the second half-wave plate 202, the first faraday rotator 203, the second polarization splitting/combining prism 204, the second faraday rotator 205, the third half-wave plate 206, the fourth half-wave plate 207, and the third polarization splitting/combining prism 208 are all the same as that of embodiment 1, the first polarization splitting/combining prism 200, the second polarization splitting/combining prism 204, and the third polarization splitting/combining prism 208 each include one polarization splitting prism 200a, 204a, and 208a combined with one high reflection mirror 200b, 204b, and 208b, and the high reflection mirrors 200b, 204b, and 208b can be replaced with polarization splitting prisms, which is different from embodiment 1 in that the direction of the second polarization splitting/combining prism is different from embodiment 1, the optical splitting position of the loop part of the circulator in embodiment 1 is parallel to the port 1, while the optical splitting position of the loop part of the circulator in embodiment 2 is parallel to the port 3, and in addition, the optical axis direction of the corresponding half-wave plate needs to be adjusted correspondingly.
FIG. 8 is a schematic diagram illustrating polarization state changes of light transmitted from port 1 to port 2 of the optical circulator of the present invention, ① shows polarization directions of P light and S light after incident light passing through port 1 passes through a first PBS (polarization splitting) combining prism 200, the two polarization states are orthogonal to each other, ② shows polarization directions of the two polarization states after the two light passes through a first half-wave plate 201 and a second half-wave plate 202, the two light is rotated 45 degrees in opposite directions and then becomes light in the same polarization direction, ③ shows polarization directions of the two polarization states after the two light passes through a first Faraday rotator 203, the two light both become light in horizontal polarization direction after being rotated 45 degrees in counterclockwise direction, ④ shows polarization directions of the two light after passing through a second PBS (polarization splitting) combining prism 204 and remaining in horizontal polarization direction, ⑤ shows polarization directions of the two light in horizontal polarization states after passing through a second Faraday rotator 205, the two light in horizontal polarization states rotate 45 degrees in counterclockwise direction, ⑥ shows polarization directions of the two light passing through a third PBS and a fourth PBS 206, and after the two light passes through a second Faraday prisms and outputs the two polarization states after the two light passes through a second PBS and the half-wave plates 207 and after being rotated mutually orthogonal to the two S light.
FIG. 9 is a schematic diagram showing polarization state changes of light transmission from port 2 to port 3 of the optical circulator of the present invention, ⑥ shows polarization directions of P light and S light after incident light from port 2 passes through a third PBS (polarization splitting) combining prism 208, the two polarization states are orthogonal to each other, ⑤ shows polarization directions of two polarization states after the two light passes through a third half-wave plate 206 and a fourth half-wave plate 207, the two light changes to light with the same polarization direction after rotating 45 degrees in opposite directions, ④ shows polarization directions of two polarization states after the two light passes through a second Faraday rotator 205, the two light changes to light with vertical polarization direction after rotating 45 degrees in counterclockwise direction, ③ shows polarization directions of two light after passing through a second PBS (polarization splitting) combining prism 204 and remaining in vertical polarization direction, ② shows polarization directions of two light with horizontal polarization state after passing through a first Faraday rotator 203, the two light with vertical polarization state rotates 45 degrees in counterclockwise direction, and ① shows polarization states after passing through a second PBS and a second half-wave plate 202, the two light changes to light passes through a second PBS and the first P light changes to light and the last polarization state after passing through a second PBS, the two light changes to light passes through a second PBS and the polarization state, and the light changes to light outputting the light with the polarization state after rotating counterclockwise direction, and the two light passing through the first half-wave plate 202.
Fig. 10 is a three-dimensional schematic diagram of the combined body of this embodiment, and similar to embodiment 1, this embodiment may also connect the first polarization splitting/combining prism 200, the first half-wave plate 201, the second half-wave plate 202, the first faraday rotator 203, the second polarization splitting/combining prism 204, the second faraday rotator 205, the third half-wave plate 206, the fourth half-wave plate 207, and the third polarization splitting/combining prism 208 together by using deepening optical cement or optical refractive index matching cement to form a combined body, so as to form a compact structure.
While only the preferred embodiments of the invention have been disclosed, it is to be understood that variations and modifications of the disclosed embodiments may be possible, and that alternative and equivalent various components of the embodiments may be known to those skilled in the art, and it will be apparent to those skilled in the art that the invention may be embodied in other forms, structures, arrangements, proportions, and with the use of specific elements thereof, without departing from the spirit or essential characteristics thereof.
Claims (8)
1. A free-space circulator, comprising: the polarization beam splitting and combining device comprises a first polarization beam splitting and combining prism, a first half-wave plate, a second half-wave plate, a first Faraday rotator, a second polarization beam splitting and combining prism, a second Faraday rotator, a third half-wave plate, a fourth half-wave plate and a third polarization beam splitting and combining prism which are sequentially arranged along a light path, wherein the first polarization beam splitting and combining prism, the second polarization beam splitting and combining prism and the third polarization beam splitting and combining prism respectively comprise two polarization beam splitting prisms or a polarization beam splitting prism and a high reflecting mirror which are parallel to each other and divide an emergent surface and an incident surface into two parts, when light enters from one port of the first polarization beam splitting and combining prism, the light sequentially passes through the first half-wave plate, the second half-wave plate, the first Faraday rotator, the second polarization beam splitting and combining prism, the second Faraday rotator, the third half-wave plate and the fourth half-wave plate and is output from one port of the third polarization beam splitting and combining prism, on the contrary, after the light enters from the output port of the third polarization beam splitting and combining prism, the light is output from the other port of the first polarization beam splitting and combining prism.
2. A free space circulator as claimed in claim 1, wherein: the first half-wave plate and the second half-wave plate are fixedly connected and used for rotating the polarization direction of the passing light by 45 degrees, and the first Faraday rotator is used for rotating the polarization direction of the passing light by 45 degrees.
3. A free space circulator as claimed in claim 1, wherein: the third half wave plate and the fourth half wave plate are fixedly connected and used for rotating the polarization direction of the passing light by 45 degrees, and the second Faraday rotator is used for rotating the polarization direction of the passing light by 45 degrees.
4. A free space circulator as claimed in claim 1, wherein: the first Faraday rotator or/and the second Faraday rotator is/are latching type Faraday rotator.
5. A free space circulator as claimed in claim 1, wherein: the first Faraday rotator or/and the second Faraday rotator is/are non-latching Faraday rotator, and one or more magnetic blocks or magnetic rings are arranged on the outer side of the non-latching Faraday rotator.
6. A free space circulator as claimed in claim 1, wherein: placing the first and second half-wave plates of the optical circulator of any of claims 1 to 9 after the first faraday rotator and the third and fourth half-wave plates before the second faraday rotator.
7. A free space circulator as claimed in claim 1, wherein: the first polarization light splitting and combining prism, the first half-wave plate, the second half-wave plate, the first Faraday rotator, the second polarization light splitting and combining prism, the second Faraday rotator, the third half-wave plate, the fourth half-wave plate and the third polarization light splitting and combining prism are connected into a whole by deepening optical cement.
8. A free space circulator as claimed in claim 1, wherein: the first polarization light-splitting combination prism, the first half-wave plate, the second half-wave plate, the first Faraday rotator, the second polarization light-splitting combination prism, the second Faraday rotator, the third half-wave plate, the fourth half-wave plate and the third polarization light-splitting combination prism are glued and connected into a whole, and the refractive index of glue used for gluing corresponds to the refractive index of a corresponding joint surface in a matching mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811081612.2A CN110908149A (en) | 2018-09-17 | 2018-09-17 | Free space circulator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811081612.2A CN110908149A (en) | 2018-09-17 | 2018-09-17 | Free space circulator |
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| CN110908149A true CN110908149A (en) | 2020-03-24 |
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| CN201811081612.2A Pending CN110908149A (en) | 2018-09-17 | 2018-09-17 | Free space circulator |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020168128A1 (en) * | 2001-02-26 | 2002-11-14 | Jds Uniphase Corporation | Optical circulator |
| US20030007244A1 (en) * | 2001-07-05 | 2003-01-09 | Oplink Communications, Inc. | Loop optical circulator |
| CN2609001Y (en) * | 2003-03-06 | 2004-03-31 | 珠海保税区光联通讯技术有限公司 | Three-port circulator |
| CN2648707Y (en) * | 2003-04-25 | 2004-10-13 | 珠海保税区光联通讯技术有限公司 | Closed circuit circulator |
| CN201072456Y (en) * | 2007-07-02 | 2008-06-11 | 珠海保税区光联通讯技术有限公司 | Four-port circulator |
| CN202025159U (en) * | 2011-05-04 | 2011-11-02 | 福州高意通讯有限公司 | Optical circulator with compact structure |
-
2018
- 2018-09-17 CN CN201811081612.2A patent/CN110908149A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020168128A1 (en) * | 2001-02-26 | 2002-11-14 | Jds Uniphase Corporation | Optical circulator |
| US20030007244A1 (en) * | 2001-07-05 | 2003-01-09 | Oplink Communications, Inc. | Loop optical circulator |
| CN2609001Y (en) * | 2003-03-06 | 2004-03-31 | 珠海保税区光联通讯技术有限公司 | Three-port circulator |
| CN2648707Y (en) * | 2003-04-25 | 2004-10-13 | 珠海保税区光联通讯技术有限公司 | Closed circuit circulator |
| CN201072456Y (en) * | 2007-07-02 | 2008-06-11 | 珠海保税区光联通讯技术有限公司 | Four-port circulator |
| CN202025159U (en) * | 2011-05-04 | 2011-11-02 | 福州高意通讯有限公司 | Optical circulator with compact structure |
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Application publication date: 20200324 |