CN110289545A - A kind of double light comb preparation methods of miniaturization of double frequency output - Google Patents
A kind of double light comb preparation methods of miniaturization of double frequency output Download PDFInfo
- Publication number
- CN110289545A CN110289545A CN201910528839.5A CN201910528839A CN110289545A CN 110289545 A CN110289545 A CN 110289545A CN 201910528839 A CN201910528839 A CN 201910528839A CN 110289545 A CN110289545 A CN 110289545A
- Authority
- CN
- China
- Prior art keywords
- output
- double
- frequency
- laser
- temperature
- 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.)
- Pending
Links
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
- H01S3/105—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
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
- H01S3/109—Frequency multiplication, e.g. harmonic generation
-
- 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
- H01S3/1305—Feedback control systems
-
- 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
- H01S3/131—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
- H01S3/1317—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation by controlling the temperature
-
- 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
- H01S3/139—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Automation & Control Theory (AREA)
- Nonlinear Science (AREA)
- Lasers (AREA)
Abstract
The invention discloses a kind of double light comb preparation methods of the miniaturization of double frequency output, it include: building " L " type laser ring cavity: on optics bread board, the laser of light comb is emitted by launching fiber collimator, it is divided into two bundles through the first quarter wave plate, the one 1/2 wave plate, the first polarizing beam splitter mirror, it is a branch of to be used as output laser through the 2nd 1/2 wave plate, another beam is reflected through spatial light isolator through optical filter, the second quarter wave plate, by the first reflecting mirror, is coupled into the first reception optical fiber collimator；The design of double frequency optical output: single centre frequency output light is divided into parallel two beam via the second polarizing beam splitter mirror by output laser, and directly to export, the output of the second tunnel is that frequency multiplication exports for first via output；Temperature Control System Design: in several ceramic heating flakes of each side of optics bread board arrangement；One temperature value is preset to table top temperature by feedback loop temperature control system, ceramic heating flake can be made to heat when the sensor that temperature control system is equipped with detects that temperature is less than preset value, stop heating when temperature is higher than preset value.
Description
Technical field
The present invention relates to the double light combs of miniaturization that double optics frequency comb instrument preparation field more particularly to a kind of double frequency export
Preparation method.
Background technique
Optical frequency com is that one kind can be based on the new type light source that optical fiber mode-locking technique is prepared.In frequency domain, it is by numerous
Frequency component composition, and be distributed adjacent component between frequency interval having the same, as shown in Figure 1.Due to optical frequency
Numerous frequency contents that comb includes can be locked to clock source by precision, and frequency stability (i.e. wavelength stability) can reach
To 10-12Magnitude realizes magnitude tracing.In time domain, it is a succession of burst pulse with extremely stable time interval, arteries and veins
Rushing width can be narrow to femtosecond (10-15Second).Wherein, the time interval between two adjacent pulses is T, and corresponding in frequency domain, two is adjacent
Frequency interval between mode is frep, repetition rate frep=1/T.Preparating mechanism of double light combs based on optical frequency com, passes through
The repetition rate of two optical frequency coms is adjusted, so that the repetition rate f of two light combsr1And fr2There is fine difference, difference is
Δfr。
The advantage for having single optical frequency com incomparable based on double light comb rangings and measuring equipment.It is primarily based on double light
The measuring equipment of comb can form optical sampling by the repetition difference between two light combs, can obtain interference fringe as shown in Figure 2, be not necessarily to
The scanning devices such as displacement platform are installed additional for system, while guaranteeing system high-precision and stability, reduce equipment volume.Secondly
Scanning mode based on optical sampling, achievable light velocity measurement.
But it is directed to the preparation method of double light combs at present, there is also certain rooms for improvement.It is primarily based on optical fiber mode locking
The geometrical light-path design that double light comb preparation methods of mode mostly use linear type to be distributed, such mode cannot effectively utilize
Design space causes equipment volume excessively huge.In addition universal double light combs are single centre frequency, but it cannot expire simultaneously
The different applications environment such as sufficient atmosphere, underwater, and seriously affecting in view of temperature on fiber, but also double light combs are actually being answered
It is interfered vulnerable to ambient enviroment in.
Summary of the invention
The present invention provides a kind of double light comb preparation methods of the miniaturization of double frequency output, and the present invention is by geometrical light-path and system
The improvement of standby device effectively improves double light comb portability, practicability and stability on engineer application, high-precision same in guarantee
When, it realizes instrument miniaturization, promotes engineering practicability, expand the application scenarios of double light combs, described below:
A kind of double light comb preparation methods of miniaturization of double frequency output, the described method comprises the following steps:
1) " L " type laser ring cavity is constructed:
On optics bread board, the laser of light comb is emitted by launching fiber collimator, through the first quarter wave plate, the one 1/2 wave
Piece, the first polarizing beam splitter mirror are divided into two bundles, and a branch of to be used as output laser through the 2nd 1/2 wave plate, another beam is through optical filter, the 2nd 1/
4 wave plates are reflected through spatial light isolator by the first reflecting mirror, are coupled into the first reception optical fiber collimator；
2) double frequency optical output designs
Single centre frequency output light is divided into parallel two beam, first via output via the second polarizing beam splitter mirror by output laser
Directly to export, the output of the second tunnel is that frequency multiplication exports；
3) Temperature Control System Design
On optics bread board, the dry plate ceramic heating flake if each side is arranged；By feedback loop temperature control system to platform
Face temperature presets a temperature value, can make ceramic heat when the sensor that temperature control system is equipped with detects that temperature is less than preset value
Piece heating, stops heating when temperature is higher than preset value.
Wherein, described to be directly output as:
Output laser is divided into two bundles by the second polarizing beam splitter mirror, wherein it is a branch of via the second reflecting mirror reflection coupling into the
Two reception optical fiber collimators are with original rate-adaptive pacemaker；
The frequency multiplication output are as follows:
Another beam of laser on frequency-doubling crystal, then passes through the second lens and beam-expanding collimation microscope group by the first lens focus
It is exported with double-frequency laser.
Further, the ceramic heating flake is equidistantly arranged.
The beneficial effect of the technical scheme provided by the present invention is that:
1, for double light comb miniature requirements, geometrical light-path is designed as " L " type laser ring cavity, reduces original by the present invention
The longitudinal length of this linear type geometrical light-path, equipment volume and quality reduce about 1/2；
2, in signal output, the way of output of two-way reflection is taken, while exporting double frequency optical frequency com.Wherein
Frequency-doubling crystal is introduced in one reflected light path, by the infrared signal frequency multiplication generation wavelength for being 1060nm by the wavelength of pumping input
Two-frequency signal for the green optical signal of 530nm, therefore the double light combs of realization exports simultaneously in two parallel light paths；
3, double light combs are coped with to temperature controlled strict demand, the present invention is double light combs by PID control ceramic heating flake
Stable operating temperature is provided, in order to keep the stabilization of double light comb repetition rates by piezoelectric ceramics (PZT), control precision is
±0.1℃；
4, the problem of present invention overcomes traditional double light comb equipment instruments huge, can not adapt to a variety of operative scenarios simultaneously be
Double light comb commercialization and preparation method provide new thinking, meet high-precision, high practicability and high stability in industry measurement
Etc. domestic demands, also will provide technological reserve for the preparation and application for being related to double optics frequency comb；
5, guarantee the instrument of its portability, practicability and stability on engineering metering and the manufacturing for double light combs
The demand of preparation gets rid of linear type geometrical light-path design framework, utilizes the anti-of geometrical light-path on double light comb device arrangement modes
Penetrating property improves space efficiency utilization, realizes instrument and equipment miniaturization, promotes its engineer application potentiality；
6, around the adaptability of different application scene, single-frequency output is improved to double frequency output, improves instrument and equipment
Practicability.Influence of the temperature to double light comb stability is considered simultaneously, by the way of real-time temperature control.
Detailed description of the invention
Fig. 1 is the time domain of optical frequency com and the schematic diagram of frequency domain characteristic；
Fig. 2 is that double light combs interfere schematic diagram；
Fig. 3 is " L " type geometrical light-path schematic diagram；
Fig. 4 is " L " type geometrical light-path installation diagram；
Fig. 5 is double frequency doubleway output schematic diagram；
Fig. 6 is the combination diagram of " L " type laser ring cavity and double frequency output.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, embodiment of the present invention is made below further
Ground detailed description.
The embodiment of the present invention is based on optical fiber mode-locking technique and generates optical frequency com, by means of piezoelectric ceramics controller output one
A voltage drive signals control piezoelectric ceramics (PZT) movement can offset the environment such as external temperature, humidity during PZT is flexible
Influence of the factor to entire laser ring cavity length, so that length of ring cavity keeps stablizing, so as to repeat frequency to double light combs
Rate carries out accurate lock.Used laser designs as shown in figure 3, preparation step is as follows:
Step 1: " L " type laser ring cavity design
As shown in figure 3, free space optical is directed toward by arrow in figure and is passed in using optics bread board 11 as double light combs of carrying
Broadcast, by by quarter wave plate 2,1/2 wave plate 3, optical filter 5 and quarter wave plate 6 clamping system, among these by the first reflecting mirror
7, the free space optical for adjusting reflection carries out pitching and beat within the preset angle range, so that light beam coupling is into receiving the
One optical fiber collimator 10 constitutes laser ring cavity, completes the reflection to mode locking optical path and extends.
Wherein, complete optical path is described as follows: on the optics bread board 11 carried, there is 2 tunnel light combs, wherein light all the way
The laser of comb is emitted by launching fiber collimator 1, via quarter wave plate 2,1/2 wave plate 3, is then passed through the first polarizing beam splitter mirror 4 and is divided
For two beams, wherein a branch of be used as output laser via 1/2 wave plate 8, another beam passes through optical filter 5, quarter wave plate 6, anti-via first
It penetrates mirror 7 and is reflected through spatial light isolator 9, be coupled into the first reception optical fiber collimator 10.
Wherein, the structure of 2 tunnel light combs is all the same, and the embodiment of the present invention does not repeat them here this.
Structural assembly diagram as shown in Figure 4 reduces system longitudinal direction volume under the premise of guaranteeing that optical frequency com generates,
Effectively improve horizontal space utilization efficiency.
Wherein, above-mentioned predetermined angle may range from -4 °~+4 °, can also need to carry out according in practical application
Setting, the embodiment of the present invention are without limitation.
Step 2: double frequency optical output design
As shown in figure 5, double light combs are improved to optical path double frequency doubleway output as shown by arrows in figure, by 1/2 wave in Fig. 5
Single centre frequency output light is divided into parallel two beam via the second polarizing beam splitter mirror 12 by the output laser that piece 8 is emitted, wherein one
Beam passes through the second lens after 14 frequency multiplication of frequency-doubling crystal by the first lens 13 that focal position is 14 center of frequency-doubling crystal
15 and beam-expanding collimation microscope group 16 expand shaping and obtain double frequency and export double light combs.
Wherein, complete optical path is described as follows:
First via output is directly output, it may be assumed that output laser is divided into two bundles by the second polarizing beam splitter mirror 12, wherein a branch of
Via 17 reflection coupling of the second reflecting mirror into the second reception optical fiber collimator 18 with original rate-adaptive pacemaker；
The output of second tunnel is that frequency multiplication exports, it may be assumed that another beam of laser focuses on frequency-doubling crystal 14 by the first lens 13, with
It is exported afterwards by the second lens 15 and beam-expanding collimation microscope group 16 with double-frequency laser.
Step 3: Temperature Control System Design
According to fiber distribution situation in double light combs, on the optics bread board 11 of carrying laser, between each side is to wait
Away from form arrange 3 ceramic heating flakes, four sides amount to arrangement 12, and that accomplishes entire double light comb loading floors stablizes control
Temperature.Such as 26 DEG C of a temperature value is preset to table top temperature by feedback loop (PID) temperature control system simultaneously, and is supervised in real time
Control.Ceramic heating flake can be made to heat rapidly when the sensor that temperature control system is equipped with detects temperature less than 26 DEG C, when temperature height
It can stop heating when 26 DEG C, thus make laser. operating temperature keep stablizing by PID temperature control system.Stable work temperature
Degree meets the adjustable range (19 μm) of PZT, therefore can be realized the length of repetition rate so that the long mobility scale of annular chamber is smaller
Time lock is to meet measuring requirement.
Quantity, arrangement and the table top temperature preset value of above-mentioned ceramic heating flake are all in accordance in practical application
It is set, the embodiment of the present invention is without limitation.
Above-mentioned PID temperature control system is known to those skilled in the art, and the PID temperature control such as model XH-W2023 may be selected
System, the embodiment of the present invention to the model of the device with no restrictions.
The embodiment of the present invention to the model of each device in addition to doing specified otherwise, the model of other devices with no restrictions,
As long as the device of above-mentioned function can be completed.
It will be appreciated by those skilled in the art that attached drawing is the schematic diagram of a preferred embodiment, the embodiments of the present invention
Serial number is for illustration only, does not represent the advantages or disadvantages of the embodiments.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (3)
1. a kind of double light comb preparation methods of miniaturization of double frequency output, which is characterized in that the described method comprises the following steps:
1) " L " type laser ring cavity is constructed:
On optics bread board, the laser of light comb is emitted by launching fiber collimator, through the first quarter wave plate, the one 1/2 wave plate,
First polarizing beam splitter mirror is divided into two bundles, and a branch of to be used as output laser through the 2nd 1/2 wave plate, another beam is through optical filter, the 2nd 1/4 wave
Piece is reflected through spatial light isolator by the first reflecting mirror, is coupled into the first reception optical fiber collimator；
2) double frequency optical output designs
Single centre frequency output light is divided into parallel two beam via the second polarizing beam splitter mirror by output laser, and first via output is straight
Output is connect, the output of the second tunnel is that frequency multiplication exports；
3) Temperature Control System Design
On optics bread board, the dry plate ceramic heating flake if each side is arranged；By feedback loop temperature control system to table top temperature
It spends and presets a temperature value, ceramic heating flake can be made to add when the sensor that temperature control system is equipped with detects that temperature is less than preset value
Heat stops heating when temperature is higher than preset value.
2. a kind of double light comb preparation methods of miniaturization of double frequency output according to claim 1, which is characterized in that
It is described to be directly output as:
Output laser is divided into two bundles by the second polarizing beam splitter mirror, wherein a branch of connect via the second reflecting mirror reflection coupling into second
Optical fiber collimator is received with original rate-adaptive pacemaker；
The frequency multiplication output are as follows:
Another beam of laser on frequency-doubling crystal, passes through the second lens and beam-expanding collimation microscope group then by the first lens focus with again
Frequency laser output.
3. a kind of double light comb preparation methods of miniaturization of double frequency output according to claim 1, which is characterized in that
The ceramic heating flake is equidistantly arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910528839.5A CN110289545A (en) | 2019-06-18 | 2019-06-18 | A kind of double light comb preparation methods of miniaturization of double frequency output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910528839.5A CN110289545A (en) | 2019-06-18 | 2019-06-18 | A kind of double light comb preparation methods of miniaturization of double frequency output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110289545A true CN110289545A (en) | 2019-09-27 |
Family
ID=68004526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910528839.5A Pending CN110289545A (en) | 2019-06-18 | 2019-06-18 | A kind of double light comb preparation methods of miniaturization of double frequency output |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110289545A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111906306A (en) * | 2020-06-10 | 2020-11-10 | 上海航天设备制造总厂有限公司 | Multi-wavelength laser processing optical path system of melting additive manufacturing equipment |
| CN112485222A (en) * | 2020-10-10 | 2021-03-12 | 中国科学院西安光学精密机械研究所 | High-integration ultra-high-resolution mid-infrared double-optical-comb spectrum measuring device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101436753A (en) * | 2008-12-26 | 2009-05-20 | 北京工业大学 | Laser cavity external frequency multiplication system |
| US20120327960A1 (en) * | 2011-06-21 | 2012-12-27 | Frank Wise | Mode-locked fiber laser based on narrowband optical spectral filtering and amplifier similaritons |
| CN103022863A (en) * | 2012-12-11 | 2013-04-03 | 北京大学 | Ring cavity mode locking fiber laser |
| CN108873008A (en) * | 2018-06-12 | 2018-11-23 | 天津大学 | A kind of Underwater Range high-precision measuring method based on the interference of double light combs |
| CN109244805A (en) * | 2018-11-02 | 2019-01-18 | 中国科学院西安光学精密机械研究所 | Phase-change thermal control system and method for high-power laser diode pumping source array |
-
2019
- 2019-06-18 CN CN201910528839.5A patent/CN110289545A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101436753A (en) * | 2008-12-26 | 2009-05-20 | 北京工业大学 | Laser cavity external frequency multiplication system |
| US20120327960A1 (en) * | 2011-06-21 | 2012-12-27 | Frank Wise | Mode-locked fiber laser based on narrowband optical spectral filtering and amplifier similaritons |
| CN103022863A (en) * | 2012-12-11 | 2013-04-03 | 北京大学 | Ring cavity mode locking fiber laser |
| CN108873008A (en) * | 2018-06-12 | 2018-11-23 | 天津大学 | A kind of Underwater Range high-precision measuring method based on the interference of double light combs |
| CN109244805A (en) * | 2018-11-02 | 2019-01-18 | 中国科学院西安光学精密机械研究所 | Phase-change thermal control system and method for high-power laser diode pumping source array |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111906306A (en) * | 2020-06-10 | 2020-11-10 | 上海航天设备制造总厂有限公司 | Multi-wavelength laser processing optical path system of melting additive manufacturing equipment |
| CN112485222A (en) * | 2020-10-10 | 2021-03-12 | 中国科学院西安光学精密机械研究所 | High-integration ultra-high-resolution mid-infrared double-optical-comb spectrum measuring device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103746285B (en) | A kind of high stability laser frequency scanning means based on acousto-optic modulator | |
| CN107367734B (en) | Measuring device | |
| CN110289545A (en) | A kind of double light comb preparation methods of miniaturization of double frequency output | |
| CN108666862B (en) | A kind of infrared double-wave length is tunable from optical parametric oscillator | |
| CN107577015A (en) | Optical transmitting set and optical module | |
| CN107463007A (en) | A kind of binary channels phase jitter restraining device and method for raman laser system | |
| CN101446687A (en) | Collinear femto-second laser polarized pump detecting system | |
| CN105182674B (en) | The special LASER Light Source of laser projection | |
| CN105261922A (en) | A compact broadband-spectrum independently-tunable dual-wavelength parameter oscillator | |
| CN106646758B (en) | Single-mode fiber self-adaptive coupling system based on two-dimensional scanning of fiber end face | |
| CN101841122A (en) | Method of alkali metal gas electrodeless lamp pump to output alkali metal gas laser and laser device | |
| CN109038200A (en) | The medium-wave infrared laser of high brightness | |
| CN106911069A (en) | A kind of chamber adjustable optical fiber femtosecond laser long | |
| CN102769251B (en) | Resonant cavity device and use system and the device of this resonant cavity | |
| CN102832529A (en) | Dual-frequency-laser-based photoproduction tunable microwave source and frequency stabilization control method | |
| KR20220104810A (en) | Frequency converter for optimizing the properties of harmonics in lasers | |
| CN211955982U (en) | High-precision continuously adjustable stable output laser power attenuation device | |
| CN105446120A (en) | Optical fiber link time-frequency distribution device based on femtosecond laser and stabilizing method thereof | |
| CN108180997A (en) | A kind of Fourier transform spectrometer, based on DLP technologies | |
| CN102288120B (en) | Phase shifting interferometry-based sphere diameter absolutely-precise measuring system and method thereof | |
| CN113823986B (en) | Photo-induced microwave device | |
| US4890921A (en) | Scanning interferometer | |
| CN110289542A (en) | A kind of 2 based on pyramid annular chamber μm Gao Zhongying injection frequency locking laser | |
| CN114300918A (en) | Ultra-stable narrow linewidth laser system and coupling adjustment method | |
| CN103674487A (en) | Device and method for measuring backscattering of laser gyroscope ultra-smooth reflecting mirror |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190927 |
|
| RJ01 | Rejection of invention patent application after publication |