CN106911068A - The method of the spuious light beam of laser stabilization of eliminating the effects of the act work - Google Patents
The method of the spuious light beam of laser stabilization of eliminating the effects of the act work Download PDFInfo
- Publication number
- CN106911068A CN106911068A CN201710102218.1A CN201710102218A CN106911068A CN 106911068 A CN106911068 A CN 106911068A CN 201710102218 A CN201710102218 A CN 201710102218A CN 106911068 A CN106911068 A CN 106911068A
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- China
- Prior art keywords
- light
- laser
- laser emitting
- emitting light
- optical filter
- 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.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/101—Lasers provided with means to change the location from which, or the direction in which, laser radiation is emitted
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/105—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
A kind of method for eliminating the spuious light beam of laser emitting light disclosed by the invention, it is desirable to provide a kind of method is simple, it is easy to accomplish, with low cost, the method that the spuious light beam of laser emitting light can be eliminated.The technical scheme is that：45 ° of bottom interior walls of optical filter lower-lying metal housing are placed in laser emitting light and fiber coupling end prepare a clinohedral for triangle at an acute angle, when laser emitting light is propagated downwards by 45 ° of optical filters, optical filter reflected light is after the slant reflection of above-mentioned clinohedral, deviate the vertical reflected light of optical filter, it is no longer along original reversible vertical reflected light path and is reflected back chip of laser, ensures the steady operation of laser.The present invention solves prior art laser emergent light and can return to chip of laser along laser emitting light light path by 45 ° of filter plate reflective reversible light, cause laser works unstable, there is luminous power saltus step, while touching the great degradation problems such as rejection ratio variation.
Description
Technical field
The present invention relates to a kind of method for eliminating spuious light beam influence laser stabilization work.
Background technology
When laser normal work, if identical outgoing polarization, stable phase potential difference, the light of co-wavelength is reflected back sharp
When light device, internally interference situation can occur by excitation cavity, so that the work appearance of laser is unstable.Such as light work(
Rate saltus step, while touching the great hydraulic performance declines such as rejection ratio variation.Traditional way is to increase isolator before laser, but this
Sample does can increase cost, and product complex structure.Prior art in the light path shown in Fig. 3, actual laser work
When direction along arrow from left to right of the light launched transmit.Because optical filter and chip of laser are all fixed on a housing
On, inwall flat smooth, laser emitting light is coupled to optical fiber by 45 ° of optical filters, and the light part that laser sends can edge
Downward arrow light path to beat in inner walls.Reversible according to light path, these light can be along original laser emitting light light path
Chip of laser is returned to, so as to laser works can be caused unstable, luminous power saltus step occurs, while touching the weights such as rejection ratio variation
Big hydraulic performance decline.
The content of the invention
The weak point that the present invention exists for above-mentioned prior art, there is provided one kind is easily achieved, and low cost, can
The method for eliminating the spuious light beam of laser emitting light.
Above-mentioned purpose of the invention can be reached by following measures, a kind of elimination spuious light beam of laser emitting light
Method, it is characterised in that comprise the following steps, light-absorbing coating is coated with the metal shell inwall of laser, and in laser emitting
Light places 45 ° of bottom interior walls of optical filter lower-lying metal housing and prepares an inclined-plane for triangle at an acute angle with fiber coupling end
Body, when laser emitting light is propagated downwards by 45 ° of optical filters, optical filter reflected light through above-mentioned clinohedral slant reflection
Afterwards, deviate the vertical reflected light of optical filter, be no longer along original reversible vertical reflected light path and be reflected back chip of laser, to ensure
The steady operation of laser.
The present invention has the advantages that compared to prior art.
It is easily achieved.The present invention is coated with light absorbent in laser metal shell inwall.So that the light of filter plate reflection is not
Laser can be reflected back by metal inside again.The present invention increases a clinohedral below 45 ° of filter plates so that the light of reflection is kept away
The light path that Kaiyuan is come.So reflected light can not enter laser again.
Low cost.The present invention places 45 ° of bottoms of optical filter lower-lying metal housing in laser emitting light and fiber coupling end
Portion's inwall prepares a clinohedral for triangle at an acute angle, the spuious light beam of laser emitting light is eliminated, below 45 ° of optical filters
The such reflected light of inwall bevel deviates original reversible light path will not be reflected back chip of laser.Prior art is solved to swash
Light device emergent light can return to chip of laser by 45 ° of filter plate reflective reversible light along laser emitting light light path, cause
Laser works are unstable, luminous power saltus step occur, while touching the great degradation problems such as rejection ratio variation.For transceiver
Or the design of multiport optical device reduces influence of the reflected light to chip of laser.
Brief description of the drawings
Fig. 1 is that laser metal shell of the present invention smears the light path principle schematic diagram that light absorbent eliminates inwall reflected light.
Fig. 2 is that invention prepares the light path principle schematic diagram of acute triangle clinohedral in laser metal shell bottom.
Fig. 3 is that part semiconductor laser shows through the light path principle that inwall reflexes to laser when prior art laser works
It is intended to.
Specific embodiment
Refering to Fig. 1, Fig. 2.The light intensity that minus more than ten dBm is had when laser emitting light is by 45 ° of optical filters can be anti-
90 ° are penetrated to propagate downwards.According to the present invention, light-absorbing coating is coated with the metal shell inwall of laser, inner walls have applied extinction
Material, the light of so reflection can not be reflected back laser along original light path again, make the laser can be with steady operation.Extinction is applied
Layer can be coated on the base plate of laser metal shell inwall.
The light of laser transmitting is coupled into optical fiber normal through 45 ° of optical filters.Had when light is by 45 ° of optical filters
The light intensity of minus more than ten dBm can reflect 90 ° and propagate downwards.Therefore 45 ° of filters can be placed in laser emitting light and fiber coupling end
The bottom interior wall of mating plate lower-lying metal housing prepares a clinohedral for triangle at an acute angle, when laser emitting light passes through
45 ° of optical filters are propagated downwards, and optical filter reflected light deviates the vertical reflected light of optical filter after the slant reflection of above-mentioned clinohedral,
It is no longer along original reversible vertical reflected light path and is reflected back chip of laser, ensures the steady operation of laser.Laser
The light of transmitting is coupled into optical fiber normal through 45 ° of optical filters.Oblique angle has been done in housing.At this time reflected light by inwall inclined-plane
Laser can not be reflected back after reflection along original light path again.Make the laser can be with steady operation.
Claims (3)
1. it is a kind of eliminate the spuious light beam of laser emitting light method, it is characterised in that comprise the following steps, in laser emitting
Light places 45 ° of bottom interior walls of optical filter lower-lying metal housing and prepares an inclined-plane for triangle at an acute angle with fiber coupling end
Body, when laser emitting light is propagated downwards by 45 ° of optical filters, optical filter reflected light through above-mentioned clinohedral slant reflection
Afterwards, deviate the vertical reflected light of optical filter, be no longer along original reversible vertical reflected light path and be reflected back chip of laser, to ensure
The steady operation of laser.
2. the method for eliminating the spuious light beam of laser emitting light as claimed in claim 1, it is characterised in that：In the gold of laser
Category inner walls coating light-absorbing coating.
3. the method for eliminating the spuious light beam of laser emitting light as claimed in claim 1, it is characterised in that：Light-absorbing coating is coated with
On the base plate of laser metal shell inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710102218.1A CN106911068A (en) | 2017-02-24 | 2017-02-24 | The method of the spuious light beam of laser stabilization of eliminating the effects of the act work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710102218.1A CN106911068A (en) | 2017-02-24 | 2017-02-24 | The method of the spuious light beam of laser stabilization of eliminating the effects of the act work |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106911068A true CN106911068A (en) | 2017-06-30 |
Family
ID=59208620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710102218.1A Pending CN106911068A (en) | 2017-02-24 | 2017-02-24 | The method of the spuious light beam of laser stabilization of eliminating the effects of the act work |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106911068A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110716188A (en) * | 2018-07-13 | 2020-01-21 | 深圳市速腾聚创科技有限公司 | Coaxial laser radar for inhibiting leading signal and method for inhibiting leading signal |
| WO2020142919A1 (en) * | 2019-01-09 | 2020-07-16 | 深圳市大疆创新科技有限公司 | Ranging device and mobile platform |
| CN112513669A (en) * | 2020-01-03 | 2021-03-16 | 深圳市速腾聚创科技有限公司 | Laser transceiver module and laser radar |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441301A (en) * | 2006-11-21 | 2009-05-27 | 古河电气工业株式会社 | Optical module |
| CN202433089U (en) * | 2012-01-19 | 2012-09-12 | 杭州远方光电信息股份有限公司 | Low-stray light polychromator |
| JP2013242280A (en) * | 2012-05-23 | 2013-12-05 | Shimadzu Corp | Spectrometer |
| CN204881851U (en) * | 2015-07-10 | 2015-12-16 | 安徽宝龙环保科技有限公司 | Ultralow stray bare grating spectrograph |
| CN106099636A (en) * | 2014-12-17 | 2016-11-09 | 恩耐公司 | Optical loss management in high power diode laser encapsulation |
-
2017
- 2017-02-24 CN CN201710102218.1A patent/CN106911068A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441301A (en) * | 2006-11-21 | 2009-05-27 | 古河电气工业株式会社 | Optical module |
| CN202433089U (en) * | 2012-01-19 | 2012-09-12 | 杭州远方光电信息股份有限公司 | Low-stray light polychromator |
| JP2013242280A (en) * | 2012-05-23 | 2013-12-05 | Shimadzu Corp | Spectrometer |
| CN106099636A (en) * | 2014-12-17 | 2016-11-09 | 恩耐公司 | Optical loss management in high power diode laser encapsulation |
| CN204881851U (en) * | 2015-07-10 | 2015-12-16 | 安徽宝龙环保科技有限公司 | Ultralow stray bare grating spectrograph |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110716188A (en) * | 2018-07-13 | 2020-01-21 | 深圳市速腾聚创科技有限公司 | Coaxial laser radar for inhibiting leading signal and method for inhibiting leading signal |
| WO2020142919A1 (en) * | 2019-01-09 | 2020-07-16 | 深圳市大疆创新科技有限公司 | Ranging device and mobile platform |
| CN111670375A (en) * | 2019-01-09 | 2020-09-15 | 深圳市大疆创新科技有限公司 | Distance measuring device and mobile platform |
| CN112513669A (en) * | 2020-01-03 | 2021-03-16 | 深圳市速腾聚创科技有限公司 | Laser transceiver module and laser radar |
| WO2021051723A1 (en) * | 2020-01-03 | 2021-03-25 | 深圳市速腾聚创科技有限公司 | Laser transceiving module and lidar |
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Application publication date: 20170630 |