CN207764413U - A kind of new pattern laser device assembly of anti-reflective string interference - Google Patents
A kind of new pattern laser device assembly of anti-reflective string interference Download PDFInfo
- Publication number
- CN207764413U CN207764413U CN201721340134.3U CN201721340134U CN207764413U CN 207764413 U CN207764413 U CN 207764413U CN 201721340134 U CN201721340134 U CN 201721340134U CN 207764413 U CN207764413 U CN 207764413U
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- laser
- path
- isolator
- polarization
- wedge piece
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Abstract
The utility model is related to a kind of new pattern laser device assemblies of anti-reflective string interference.Including laser, terminal, negative lens, free space isolator, single fiber collimator and the unrelated isolator of polarization, the unrelated isolator of polarization includes the angle of wedge piece of reflecting surface, the angle of wedge piece of Faraday rotator and the plane of incidence, laser enters the optical fiber of the single fiber collimator after laser transmitting, the light path of the optical fiber includes path 1 and path 2, laser is along 1 incoming terminal of the path, fraction of laser light is launched the reflecting surface angle of wedge piece for reaching the unrelated isolator of polarization along the path 2 back, the laser is divided into two bundles by the reflecting surface angle of wedge piece, light beam deviation along the path 2 without being reflected into the laser after the Faraday rotator.The beneficial effects of the utility model are effectively to reduce noise, cost-effective, volume production easy to implement.
Description
Technical field
The utility model is related to the new pattern laser device assemblies that optical-fibre communications field more particularly to a kind of anti-reflective string interfere.
Background technology
The development of many decades, high-power semiconductor laser performance increasingly matureization and diversification are experienced, people are to height
The demand of power semiconductor laser is also being continuously increased.With the increase of power, corresponding laser anti-interference ability
It is required that higher and higher.The stability and reliability of signal are most importantly transmitted for analog laser, i.e., we are usual
Described bottom makes an uproar, light reflection, CSO/CTB.And it is wherein particularly important with bottom index of making an uproar.The scheme largely used at present on the market
It is between laser and tail optical fiber plus a free space isolator, for preventing to play a reversed role, light enters in chip of laser.It is many
Well known free space isolator has the function of one-way transmission, can effectively reduce optical fiber light of playing a reversed role in this way and enter laser
In device chip, the noise floor of laser can be reduced in this way.
It is conventionally used on the market between laser and optical fiber and adds a free space isolator, be isolated using free space
The unidirectional thang-kng principle of device reduces part light of playing a reversed role and directly moves back in chip of laser, improves the property of chip of laser
Energy.But since the isolation of isolator is limited, it is sharp that powerful laser still has the light of sub-fraction to be fed back to through isolator
On light device chip, also the noise floor of laser can be caused bigger than normal to a certain extent.
Invention content
In view of the above-mentioned problems, the utility model provides a kind of new pattern laser device assembly of anti-reflective string interference.
In order to achieve the above object, the technical solution of the utility model is：A kind of new laser group of anti-reflective string interference
Part, it is characterised in that including laser, terminal, negative lens, free space isolator, single fiber collimator and the unrelated isolation of polarization
Device, the unrelated isolator of the polarization include the angle of wedge piece of the angle of wedge piece of reflecting surface, Faraday rotator and the plane of incidence, and laser is from institute
The optical fiber for entering the single fiber collimator after laser emits is stated, the light path of the optical fiber includes path 1 and path 2, laser edge
1 incoming terminal of the path, fraction of laser light is launched reaches the anti-of the unrelated isolator of polarization along the path 2 back
Face angle of wedge piece is penetrated, the laser is divided into two bundles by the reflecting surface angle of wedge piece, the light beam deviation after the Faraday rotator
Without being reflected into the laser along the path 2.Further, the laser is laser diode.
Further, the free space isolator is polarization-dependent isolator.
Further, the directional light of the single fiber collimator can be pooled convergent point light by the negative lens.
Further, the unrelated isolator of the polarization is positioned in tube body, with the optical fiber of single fiber collimator coupling each other
It closes.
The beneficial effects of the utility model are effectively to reduce noise, cost-effective, volume production easy to implement.
Description of the drawings
Fig. 1 is the principles of the present invention schematic diagram.
Reference numeral：01 laser；02 free space isolator；03 negative lens；The 04 unrelated isolator of polarization；041 polarization
The Faraday rotator 043 that the angle of wedge piece 042 of the reflecting surface of unrelated isolator polarizes unrelated isolator polarizes unrelated isolator
05 collimator optical fiber of angle of wedge piece, the 06 novel isolator tube body of the plane of incidence.
Specific implementation mode
With reference to the accompanying drawings and detailed description, the utility model is described further.
A kind of new pattern laser device assembly of anti-reflective string interference as shown in Figure 1, including laser 01, negative lens 04, freely sky
Between isolator 02, single fiber collimator optical fiber 05 and the unrelated isolator 04 of polarization, the unrelated isolator of polarization includes reflecting surface
The angle of wedge piece 043 of angle of wedge piece 041, Faraday rotator 042 and the plane of incidence.The light reflected on circuit is reached by path 2 and is polarized
The directional light of the angle of wedge piece 041 of the reflecting surface of unrelated isolator 04, single beam is divided into two beams, the light beam after Faraday rotator
Deviation, due to the difference of refractive index, this two-beam can not possibly again close in the angle of wedge piece 043 for polarizing the unrelated isolator plane of incidence
At a branch of directional light, light beam can be reflected into other places, to be reflected into chip of laser along route 2, to laser
Device chip not will produce extra light of playing a reversed role, to effectively reduce the noise floor of laser.
Those skilled in the art, which should be understood that, is not departing from the utility model defined by the appended claims
In spirit and scope, the various change made in the form and details to the utility model is the protection of the utility model
Range.
Claims (5)
1. a kind of new pattern laser device assembly of anti-reflective string interference, it is characterised in that including laser, terminal, negative lens, freely sky
Between isolator, single fiber collimator and the unrelated isolator of polarization, the unrelated isolator of polarization includes angle of wedge piece, the farad of reflecting surface
The angle of wedge piece of circulator and the plane of incidence, laser enters the optical fiber of the single fiber collimator after laser transmitting, described
The light path of optical fiber includes path 1 and path 2, and along 1 incoming terminal of the path, fraction of laser light is launched back along institute laser
The reflecting surface angle of wedge piece that path 2 reaches the unrelated isolator of polarization is stated, the laser is divided into two by the reflecting surface angle of wedge piece
Beam, light beam deviation along the path 2 without being reflected into the laser after the Faraday rotator.
2. the new pattern laser device assembly of anti-reflective string interference as described in claim 1, it is characterised in that the laser is laser two
Pole pipe.
3. the new pattern laser device assembly of anti-reflective string interference as described in claim 1, it is characterised in that the free space isolator
For polarization-dependent isolator.
4. the new pattern laser device assembly of anti-reflective string as described in claim 1 interference, it is characterised in that the negative lens can will be described
The directional light of single fiber collimator pools convergent point light.
5. the new pattern laser device assembly that the anti-reflective string as described in Claims 1-4 is any interferes, it is characterised in that the polarization is unrelated
Isolator is positioned in tube body, is coupled each other with the optical fiber of the single fiber collimator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721340134.3U CN207764413U (en) | 2017-10-18 | 2017-10-18 | A kind of new pattern laser device assembly of anti-reflective string interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721340134.3U CN207764413U (en) | 2017-10-18 | 2017-10-18 | A kind of new pattern laser device assembly of anti-reflective string interference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207764413U true CN207764413U (en) | 2018-08-24 |
Family
ID=63179087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721340134.3U Expired - Fee Related CN207764413U (en) | 2017-10-18 | 2017-10-18 | A kind of new pattern laser device assembly of anti-reflective string interference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207764413U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212689A (en) * | 2018-10-26 | 2019-01-15 | 厦门市贝莱通信设备有限公司 | A kind of one hair BOSA optical transceiver module of the receipts of adjacent wavelength one |
-
2017
- 2017-10-18 CN CN201721340134.3U patent/CN207764413U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212689A (en) * | 2018-10-26 | 2019-01-15 | 厦门市贝莱通信设备有限公司 | A kind of one hair BOSA optical transceiver module of the receipts of adjacent wavelength one |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180824 Termination date: 20191018 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |