CN108828719A - A kind of optical isolator - Google Patents
A kind of optical isolator Download PDFInfo
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- CN108828719A CN108828719A CN201810779686.7A CN201810779686A CN108828719A CN 108828719 A CN108828719 A CN 108828719A CN 201810779686 A CN201810779686 A CN 201810779686A CN 108828719 A CN108828719 A CN 108828719A
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- pbs prism
- optical
- prism
- pbs
- optical fiber
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/27—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
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
The invention discloses a kind of optical isolators comprising along double optical fiber mechanisms, the first PBS prism, optically-active mechanism, the 2nd PBS prism and the reflecting mirror of optical path setting；Double optical fiber mechanisms include input optical fibre and output optical fibre；Equal polarization beam splitter in first PBS prism and the 2nd PBS prism, the upper surface and lower end surface of the first PBS prism and the 2nd PBS prism are additionally provided with high-reflecting film；Reflecting mirror is opposite with the top of the 2nd PBS prism exit facet or lower part；After optical signals input optical fibre is incident, sequentially after the first PBS prism, optically-active mechanism and the 2nd PBS prism, it is emitted to reflecting mirror and is reflected back optical signal by reflecting mirror, and sequentially after the 2nd PBS prism, optically-active mechanism and the first PBS prism, it is emitted to output optical fibre, and is exported optical signal by output optical fibre；After optical signals output optical fibre is incident, sequentially after the first PBS prism, optically-active mechanism and the 2nd PBS prism, mirror reflection is directly projected and is not reflected, this programme is low in cost, isolation is high and has both compact-sized feature.
Description
Technical field
The present invention relates to the optical passive component field of Fiber Optical Communication System, especially a kind of optical isolator.
Background technique
In optical communication system transmission line, there are many sections to have different degrees of reflected light along optical fiber reverse transfer,
Cause to generate self-coupling effect between light path system, causes laser works unstable, and this backlight can also cause system
Transmission performance deteriorates, and light amplifier gain changes and generate autoexcitation, and eventually leads to the generation of error code.And optoisolator
It is only to allow light one-way transmission, isolation inhibits the passive device of backlight.
Optoisolator development in, pursue compact, high-isolation, low cost structure be that main development becomes in recent years
Gesture.
Summary of the invention
It is the case where based on the prior art, high the purpose of the present invention is to provide a kind of low in cost, isolation and can be simultaneous
The optical isolator of lamps structure compact nature.
In order to realize that above-mentioned technical purpose, the technical solution adopted by the present invention be：
A kind of optical isolator comprising double optical fiber mechanisms for being set in sequence along optical path, the first PBS prism, optically-active mechanism, second
PBS prism and reflecting mirror；
Double optical fiber mechanisms include at least an input optical fibre and an output optical fibre；
Be equipped in the first PBS prism and the 2nd PBS prism by its plane of incidence and exit facet be divided into up and down it is two-part
Polarization beam splitter, the upper surface and lower end surface of the first PBS prism and the 2nd PBS prism are additionally provided with high-reflecting film；
The reflecting mirror is opposite with the top of the 2nd PBS prism exit facet or lower part；
After optical signals input optical fibre is incident, sequentially after the first PBS prism, optically-active mechanism and the 2nd PBS prism, outgoing
Optical signal is reflected back to reflecting mirror and by reflecting mirror, and sequentially passes through the 2nd PBS prism, optically-active mechanism and the first PBS prism
Afterwards, it is emitted to output optical fibre, and is exported optical signal by output optical fibre；
After optical signals output optical fibre is incident, sequentially after the first PBS prism, optically-active mechanism and the 2nd PBS prism, directly
It projects and is not reflected mirror and receive and reflect.
As a kind of preferred embodiment of double optical fiber mechanisms, double optical fiber mechanisms are by a double-fiber collimator and one
Roof prism is constituted, and a wherein optical fiber for the optical fiber cable collimator is input optical fibre, and another optical fiber is output optical fibre, described
Roof prism is set between double-fiber collimator and the first PBS prism.
As another preferred embodiment of double optical fiber mechanisms, double optical fiber mechanisms are by a pair of of single optical fiber calibrator
It constitutes, wherein a single optical fiber calibrator is output optical fibre, another single optical fiber calibrator is output optical fibre.
Further, the optically-active mechanism includes set on the Faraday rotation between the first PBS prism and the 2nd PBS prism
Device and wave plate.
Preferably, the Faraday rotator and wave plate are sequentially set along the first PBS prism to the 2nd PBS prism direction
It sets.
Preferably, the wave plate and Faraday rotator are sequentially set along the first PBS prism to the 2nd PBS prism direction
It sets.
Further, the reflecting mirror be glued or optical cement or in-depth optical cement in the top of the 2nd PBS prism exit facet or
Lower part.
Further, the reflecting mirror is that plating is set to the top of the 2nd PBS prism exit facet or the highly reflecting films of lower part.
Further, the plane of incidence of the first PBS prism and the 2nd PBS prism is towards identical.
A kind of optical communication transmission line system, application have above-mentioned optical isolator.
Using above-mentioned technical solution, beneficial effects of the present invention are：By using double optical fiber mechanisms, the first PBS prism,
The combinations of pairs of optically-active mechanism, the 2nd PBS prism and reflecting mirror forms the optical isolator with tight structure, so that input
The input optical fibre at end in incident optical signal, can be via the first PBS prism, optically-active mechanism, the 2nd PBS prism and reflecting mirror after
It is reflected back, and is exported from the output optical fibre of output end；And the optical signals of output optical fibre incidence are by reflecting mirror in not received,
Therefore it is suppressed isolation, realizes the positive transmission of isolator, the function of reverse isolation.
Detailed description of the invention
The present invention program is further elaborated with reference to the accompanying drawings and detailed description：
Fig. 1 is the brief implementation structural schematic diagram of the embodiment of the present invention 1；
Fig. 2 is the positive optical path simplified diagram of the embodiment of the present invention 1, and reflected light path is not shown；
Fig. 3 is the righting reflex optical path simplified diagram of the embodiment of the present invention 1；
Fig. 4 is the reverse optical path simplified diagram of the embodiment of the present invention 1.
Specific embodiment
A kind of optical isolator comprising double optical fiber mechanisms for being set in sequence along optical path, the first PBS prism, optically-active mechanism,
2nd PBS prism and reflecting mirror；
Double optical fiber mechanisms include at least an input optical fibre and an output optical fibre；
Be equipped in the first PBS prism and the 2nd PBS prism by its plane of incidence and exit facet be divided into up and down it is two-part
Polarization beam splitter, the upper surface and lower end surface of the first PBS prism and the 2nd PBS prism are additionally provided with high-reflecting film；
The reflecting mirror is opposite with the top of the 2nd PBS prism exit facet or lower part；
After optical signals input optical fibre is incident, sequentially after the first PBS prism, optically-active mechanism and the 2nd PBS prism, outgoing
Optical signal is reflected back to reflecting mirror and by reflecting mirror, and sequentially passes through the 2nd PBS prism, optically-active mechanism and the first PBS prism
Afterwards, it is emitted to output optical fibre, and is exported optical signal by output optical fibre；
After optical signals output optical fibre is incident, sequentially after the first PBS prism, optically-active mechanism and the 2nd PBS prism, directly
It projects and is not reflected mirror and receive and reflect.
As a kind of preferred embodiment of double optical fiber mechanisms, double optical fiber mechanisms are by a double-fiber collimator and one
Roof prism is constituted, and a wherein optical fiber for the optical fiber cable collimator is input optical fibre, and another optical fiber is output optical fibre, described
Roof prism is set between double-fiber collimator and the first PBS prism.
As another preferred embodiment of double optical fiber mechanisms, double optical fiber mechanisms are by a pair of of single optical fiber calibrator
It constitutes, wherein a single optical fiber calibrator is output optical fibre, another single optical fiber calibrator is output optical fibre.
Further, the optically-active mechanism includes set on the Faraday rotation between the first PBS prism and the 2nd PBS prism
Device and wave plate.
Preferably, the Faraday rotator and wave plate are sequentially set along the first PBS prism to the 2nd PBS prism direction
It sets.
Preferably, the wave plate and Faraday rotator are sequentially set along the first PBS prism to the 2nd PBS prism direction
It sets.
Further, the reflecting mirror be glued or optical cement or in-depth optical cement in the top of the 2nd PBS prism exit facet or
Lower part.
Further, the reflecting mirror is that plating is set to the top of the 2nd PBS prism exit facet or the highly reflecting films of lower part.
Further, the plane of incidence of the first PBS prism and the 2nd PBS prism is towards identical.
A kind of optical communication transmission line system, application have above-mentioned optical isolator.
Embodiment 1
As shown in Fig. 1 to one of 4, this implementation includes the double-fiber collimator 101 being set in sequence along optical path, roof prism 102,
One PBS prism 103, Faraday rotation piece 104, wave plate 105, the 2nd PBS prism 106 and reflecting mirror 107；
The double-fiber collimator 101 includes an input optical fibre and an output optical fibre；
It is equipped in the first PBS prism 103 and the 2nd PBS prism 106 and its plane of incidence and exit facet is divided into upper and lower two
Partial polarization beam splitter 1031,1061, the upper surface and lower end surface of the first the PBS prism 103 and the 2nd PBS prism 106
It is additionally provided with high-reflecting film；
The reflecting mirror 107 is opposite with the lower part of 106 exit facet of the 2nd PBS prism；
As shown in Fig. 2, being retrodeviated when signal light tilts down injection roof prism 102 by the input optical fibre of double-fiber collimator 101
Folding is horizon light, after horizon light is first injected on the high-reflecting film of the lower end surface of the first PBS prism 103, is reflected into its polarization beam splitter
On 1031, then divided by polarization beam splitter 1031 for the orthogonal P light of polarization state and S light, wherein S light passes through polarization spectro
Film 1031 reflects, and exports from the exit facet lower horizontal of the first PBS prism 103, and P light is simultaneously saturating by polarization beam splitter 1031
After being incident upon the high-reflecting film of the first PBS prism upper surface, exported from the exit facet upper level of the first PBS prism 103；Horizontal output
P light and S light sequentially after Faraday rotation piece 104 and wave plate 105, polarization state remains unchanged, and is then again incident on
Two PBS prisms, wherein after S light is incident on the 2nd PBS prism 106, by 106 lower end surface of the 2nd PBS prism high-reflecting film reflection and
It is incident to after the polarization beam splitter 1061 of the 2nd PBS prism 106 and is again reflected to form the level from the 2nd PBS prism 106
Project, after P light is incident on the 2nd PBS prism 106, from 1061 horizontal transmission of polarization beam splitter of the 2nd PBS prism 106 go out and with
S is photosynthetic to be incident on reflecting mirror 107 for light beam.
As shown in figure 3, its reflected light path schematic diagram for optical path shown in Fig. 2, the signal projected from the 2nd PBS prism 106
After light is received by reflecting mirror 107, it is reflected back toward the 2nd PBS prism 106, then passes through the polarization beam splitter of the 2nd PBS prism 106
After 1061, it is divided into the orthogonal P light of polarization state and S light, wherein S light occurs reflection and is incident under the 2nd PBS prism 106
On the high-reflecting film of end face, then exported from 106 lower horizontal of the 2nd PBS prism, polarization spectro of the P light from the 2nd PBS prism 106
1061 horizontal transmission of film goes out, the P light and S light of horizontal output sequentially after wave plate 105 and Faraday rotation piece 104, due to by
Nonreciprocity to Faraday rotation piece 104 influences, and the polarization state of P light, which is rotated by 90 °, becomes S light, the polarization state rotation of S light
90 degree have become P light；Then S light is incident on the first PBS prism 103, and is reflected by the high-reflecting film of the first PBS prism 103, so
It is incident on the polarization beam splitter 1031 of the first PBS prism and is reflected afterwards, then from 103 horizontal output of the first PBS prism, P
After light is incident on the first PBS prism 103, by the first PBS prism polarization beam splitter 1031 and transmit, then from first
The output of 103 upper level of PBS prism, P light and S through the output of the first PBS prism are photosynthetic to be a branch of, then reenter and are incident upon ridge rib
On mirror 102, the signal light of glancing incidence is corrected into the light tilted down by roof prism 102 and is incident on double-fiber collimator
In 101 output optical fibre, and positive transmission is realized by output optical fibre.
As shown in figure 4, injecting roof prism 102 when signal light is tilted upwards by the output optical fibre of double-fiber collimator 101
Deviation is horizon light afterwards, and horizon light is first injected on the polarization beam splitter 1031 of the first PBS prism 103, then by polarization beam splitter
1031 points are the orthogonal P light of polarization state and S light, wherein S light is reflected by polarization beam splitter 1031, then again by
The high-reflecting film of first PBS prism, 103 upper surface reflects, and then exports from the upper level of 103 exit facet of the first PBS prism, P light
It is transmitted by polarization beam splitter 1031, from the exit facet horizontal output of the first PBS prism 103；The P light and S of horizontal output
Sequentially after Faraday rotation piece 104 and wave plate 105, polarization state remains unchanged light, is then again incident on the 2nd PBS rib
Mirror, wherein after P light is incident on the 2nd PBS prism 106, is reflected by the high-reflecting film of 106 lower end surface of the 2nd PBS prism, then pass through again
After crossing the polarization beam splitter 1061 of the 2nd PBS prism 106, generation transmission is simultaneously anti-by the high-reflecting film of 106 upper surface of the 2nd PBS prism
It penetrates, then from 106 horizontal output of the 2nd PBS prism, after S light is incident on the 2nd PBS prism 106, by the 2nd PBS prism 106
Polarization beam splitter 1061 reflects, then again by the high-reflecting film reflection of 106 upper surface of the 2nd PBS prism it is horizontal project and with P light
It is combined into light beam injection, since reflecting mirror 107 is not opposite with 106 top of the 2nd PBS prism, the 2nd PBS prism 106
The light of injection will not be received and be reflected by reflecting mirror 107, realize reverse isolation.
The above is the embodiment of the present invention, for the ordinary skill in the art, religion according to the present invention
Lead, without departing from the principles and spirit of the present invention all equivalent changes done according to scope of the present invention patent, repair
Change, replacement and variant, is all covered by the present invention.
Claims (10)
1. a kind of optical isolator, it is characterised in that：It include the double optical fiber mechanisms being set in sequence along optical path, the first PBS prism,
Optically-active mechanism, the 2nd PBS prism and reflecting mirror；
Double optical fiber mechanisms include at least an input optical fibre and an output optical fibre；
Be equipped in the first PBS prism and the 2nd PBS prism by its plane of incidence and exit facet be divided into up and down it is two-part
Polarization beam splitter, the upper surface and lower end surface of the first PBS prism and the 2nd PBS prism are additionally provided with high-reflecting film；
The reflecting mirror is opposite with the top of the 2nd PBS prism exit facet or lower part；
After optical signals input optical fibre is incident, sequentially after the first PBS prism, optically-active mechanism and the 2nd PBS prism, outgoing
Optical signal is reflected back to reflecting mirror and by reflecting mirror, and sequentially passes through the 2nd PBS prism, optically-active mechanism and the first PBS prism
Afterwards, it is emitted to output optical fibre, and is exported optical signal by output optical fibre；
After optical signals output optical fibre is incident, sequentially after the first PBS prism, optically-active mechanism and the 2nd PBS prism, directly
It projects and is not reflected mirror and receive and reflect.
2. a kind of optical isolator according to claim 1, it is characterised in that：Double optical fiber mechanisms are by a pair of optical fiber
Collimator and a roof prism are constituted, and a wherein optical fiber for the optical fiber cable collimator is input optical fibre, and another optical fiber is output
Optical fiber, the roof prism are set between double-fiber collimator and the first PBS prism.
3. a kind of optical isolator according to claim 1, it is characterised in that：Double optical fiber mechanisms are by a pair of of monochromatic light
Fine collimator is constituted, wherein a single optical fiber calibrator is output optical fibre, another single optical fiber calibrator is output optical fibre.
4. a kind of optical isolator according to claim 1, it is characterised in that：The optically-active mechanism includes being set to first
Faraday rotator and wave plate between PBS prism and the 2nd PBS prism.
5. a kind of optical isolator according to claim 4, it is characterised in that：The Faraday rotator and wave plate edge
First PBS prism to the 2nd PBS prism direction is set in sequence.
6. a kind of optical isolator according to claim 4, it is characterised in that：The wave plate and Faraday rotator edge
First PBS prism to the 2nd PBS prism direction is set in sequence.
7. a kind of optical isolator according to claim 1, it is characterised in that：The reflecting mirror be glued or optical cement or
Deepen optical cement in the top or lower part of the 2nd PBS prism exit facet.
8. a kind of optical isolator according to claim 1, it is characterised in that：The reflecting mirror is that plating is set to second
The top of PBS prism exit facet or the highly reflecting films of lower part.
9. a kind of optical isolator according to claim 1, it is characterised in that：The first PBS prism and the 2nd PBS rib
The plane of incidence of mirror is towards identical.
10. a kind of optical communication transmission line system, it is characterised in that：It includes being optically isolated described in one of claim 1 to 9
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810779686.7A CN108828719A (en) | 2018-07-16 | 2018-07-16 | A kind of optical isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810779686.7A CN108828719A (en) | 2018-07-16 | 2018-07-16 | A kind of optical isolator |
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| Publication Number | Publication Date |
|---|---|
| CN108828719A true CN108828719A (en) | 2018-11-16 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810779686.7A Pending CN108828719A (en) | 2018-07-16 | 2018-07-16 | A kind of optical isolator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109407355A (en) * | 2018-12-28 | 2019-03-01 | 光越科技(深圳)有限公司 | Double-stage photo-insulator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1068895A (en) * | 1991-07-23 | 1993-02-10 | 华中理工大学 | A kind of optical isolator |
| JPH1138363A (en) * | 1997-07-17 | 1999-02-12 | Fuji Elelctrochem Co Ltd | 3 port type optical circulator |
| KR19990053044A (en) * | 1997-12-23 | 1999-07-15 | 윤종용 | Optical circulator |
| CN204143105U (en) * | 2014-10-13 | 2015-02-04 | 武汉锐科光纤激光器技术有限责任公司 | A kind of high power optical isolator of small size |
| CN204557003U (en) * | 2015-04-13 | 2015-08-12 | 福州腾景光电科技有限公司 | The online optical-fiber laser isolator of a kind of compact reflection-type |
| TWM520451U (en) * | 2015-12-02 | 2016-04-21 | Single Well Ind Corp | Packaging mold structure and product thereof |
-
2018
- 2018-07-16 CN CN201810779686.7A patent/CN108828719A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1068895A (en) * | 1991-07-23 | 1993-02-10 | 华中理工大学 | A kind of optical isolator |
| JPH1138363A (en) * | 1997-07-17 | 1999-02-12 | Fuji Elelctrochem Co Ltd | 3 port type optical circulator |
| KR19990053044A (en) * | 1997-12-23 | 1999-07-15 | 윤종용 | Optical circulator |
| CN204143105U (en) * | 2014-10-13 | 2015-02-04 | 武汉锐科光纤激光器技术有限责任公司 | A kind of high power optical isolator of small size |
| CN204557003U (en) * | 2015-04-13 | 2015-08-12 | 福州腾景光电科技有限公司 | The online optical-fiber laser isolator of a kind of compact reflection-type |
| TWM520451U (en) * | 2015-12-02 | 2016-04-21 | Single Well Ind Corp | Packaging mold structure and product thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109407355A (en) * | 2018-12-28 | 2019-03-01 | 光越科技(深圳)有限公司 | Double-stage photo-insulator |
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Application publication date: 20181116 |