CN109494558A - The 589nm sodium beacon laser device of optical-fiber laser pumped solid Raman frequency shift - Google Patents
The 589nm sodium beacon laser device of optical-fiber laser pumped solid Raman frequency shift Download PDFInfo
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- CN109494558A CN109494558A CN201811172548.9A CN201811172548A CN109494558A CN 109494558 A CN109494558 A CN 109494558A CN 201811172548 A CN201811172548 A CN 201811172548A CN 109494558 A CN109494558 A CN 109494558A
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- 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
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- 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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06716—Fibre compositions or doping with active elements
-
- 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
- H01S3/30—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects
Abstract
The present invention provides a kind of 589nm sodium beacon laser device of optical-fiber laser pumped solid Raman frequency shift, stokes light resonator mirror is anti-reflection to fundamental frequency light, high to stokes light anti-, and two panels or multi-disc stokes light resonator mirror constitute Stokes optical cavity；Based on optical fiber basic frequency laser light source vibration-enlarged structure or be single oscillator structure so that fundamental frequency optical linewidth be less than Raman frequency shift breadth of spectrum line；Basic frequency laser incidence Raman crystal, when Raman gain is greater than loss, generation stimulated Raman scattering forms Stokes light generation under the feedback effect of Stokes optical cavity；Fundamental frequency light wavelength is selected according to the Raman frequency shift of Raman crystal, being allowed to the Stokes optical wavelength obtained after Raman frequency shift is 1178.318nm；In conjunction with Raman gain without hole burning characteristic, the stokes light of single longitudinal mode is obtained；1178.318nm stokes light exports 589.159nm sodium beacon yellow light by frequency-doubling crystal frequency multiplication.
Description
Technical field
The present invention relates to a kind of 589nm sodium of field of lasers more particularly to optical-fiber laser pumped solid Raman frequency shift letters
Mark laser.
Background technique
The narrow linewidth of sodium beacon yellow light, also known as Sodium guide star yellow light, i.e. wavelength 589.159nm, corresponding sodium ion D2 transition is yellow
Radiant has the important use that can not be substituted in adaptive optics field.Sodium beacon yellow light relies primarily on Nd:YAG and swashs at present
1064nm the and 1319nm laser of light device and frequency and 1120nm optical-fiber laser pumping optical fiber Ramar laser frequency multiplication both sides
Method all refers to the factors such as multistage amplification and AGC, and system is complicated, and technical threshold is very high.
The Raman frequency shift main peak of most crystal is all in 800-1000cm-1It, can be by 1.06 μm of the most mature laser in range
Efficient frequency displacement is multiplied near sodium beacon wavelength 589nm in turn to 1.18 μm, therefore is based on crystal medium stimulated Raman scattering
(SRS) solid Roman laser of frequency displacement is considered as the potential technological approaches of sodium beacon yellow light for a long time.However, being based on the party
The 589.159nm single longitudinal mode light source of method has not been reported always, and reason essentially consists in following two aspect:
1, the Raman line of crystal is made of a plurality of discrete frequency displacement, and the line width of every spectral line is all very narrow, in several waves
Several magnitudes, thus be difficult to carry out continuous tuning, to make laser output precisely align required wavelength, often it is forced using specific
The combination of laser gain medium and raman gain medium, such as the 1062nm fundamental frequency light combination BaWO of Nd:GGG crystal4Crystal
925cm-1Raman frequency shift[1]Or Nd:YVO4The 1064nm fundamental frequency light combination CaWO of crystal4The 910cm of crystal-1Raman frequency shift[2]Deng,
Due to the limitation of particular crystal combination, not only the availability, maturity and quality of crystal are difficult to ensure, during laser is realized
The characteristics such as polarizability, gain, hot property are also difficult to optimize, and limit the performance of Raman yellow light.
2, the line-width of sodium ion D2 transition is~2GHz, therefore needs single longitudinal mode yellow light that could match line-width, but
SRS process will lead to line width broadening in Ramar laser, so that laser is difficult to obtain narrow-linewidth laser output, to realize Dan Zong
Mould Ramar laser need to carry out multistage amplification to single-frequency seed light using the pulse fundamental frequency light of peak value[3]Or use multi-disc inner cavity
Etalon frequency-selecting[1]Loss is big, low efficiency, at high cost, it is difficult to practical.
Bibliography
[1] a kind of single-frequency solid Roman laser, publication number CN105552709A, publication date 2016.05.04.
[2]C.H.Li and Y.C.Huang,Pulsed Intracavity Frequency-doubled CaWO4
Raman Laser for Narrow-line Sodium-yellow Radiation,CLEO,JTuD112(2010).
[3] a kind of pulsed high-energy single-frequency 589nm laser based on crystal Raman amplifiction technology, publication number
CN107565361A, publication date 2018.01.09.
Summary of the invention
The present invention provides a kind of 589nm sodium beacon laser device of optical-fiber laser pumped solid Raman frequency shift, present invention benefits
Narrow linewidth is realized with the SRS frequency displacement of the wide gain spectra characteristic of doped fiber glassy matrix, binding crystal Raman medium
589.159nm single longitudinal mode sodium beacon laser device, overcomes the wavelength of existing solid Roman yellow light sources to be difficult to tune, line width is not easy to press
The problem of contracting, thus can not accurately matching the energy level and Absorber Bandwidth of sodium beacon D2 transition, described below:
The 589nm sodium beacon laser device of optical-fiber laser pumped solid Raman frequency shift, the sodium beacon Yellow light laser include:
Optical fiber basic frequency laser light source, Raman crystal, stokes light resonator mirror, frequency-doubling crystal, condenser lens.
Wherein, the Raman crystal is coated with to basic frequency laser and stokes light anti-reflection film system, and the frequency-doubling crystal is coated with
Stokes light and yellow light anti-reflection film, the stokes light resonator mirror is anti-reflection to fundamental frequency light, high to stokes light anti-, and two
Piece or multi-disc stokes light resonator mirror constitute Stokes optical cavity.
The optical fiber basic frequency laser light source is using ytterbium (Yb) or neodymium-doped (Nd) Active Optical Fiber is mixed, due to fiber glass state matrix
Characteristic, Active Optical Fiber can provide higher gain in the wider range near 1.06 μm of emission peaks, therefore can pass through frequency-selecting
The output wavelength of measure tuning basic frequency laser；The incident Raman crystal of basic frequency laser, generates Raman gain, Raman gain is with base
Frequency laser power rise and increase, when gain be greater than loss after, occur under the feedback effect of the Stokes optical cavity
Stimulated Raman scattering (SRS) forms Stokes light generation；Fundamental frequency is selected according to the type (Raman frequency shift) of the Raman crystal
Optical wavelength, being allowed to the Stokes optical wavelength obtained after Raman frequency shift is 1178.318nm；(such as by the control of seed source line width
Vibration-enlarged structure based on optical fiber basic frequency laser light source) or fiber grating bandwidth control (such as optical fiber basic frequency laser light source be single vibration
Swing device structure) make fundamental frequency optical linewidth (without single longitudinal mode, its line width only be needed to be less than Raman line less than the breadth of spectrum line of Raman frequency shift
Width), since SRS gain is without hole burning characteristic, the stokes light of single longitudinal mode can be obtained；1178.318nm Stokes
Light obtains required 589.159nm sodium beacon yellow light output by the frequency-doubling crystal frequency multiplication.
The optical fiber basic frequency laser light source can use main vibration-enlarged structure, realize output by changing seed source wavelength
Single oscillator structure can also be used in wavelength tuning, realizes wavelength tuning by grating or other dispersion elements.
The Raman crystal may is that BaWO4The common Raman crystals such as (barium tungstate), vanadate (vanadate).
The frequency-doubling crystal may is that LBO (three lithium borates), BBO (barium metaborate), PPLN (periodically poled lithium niobate) etc.
The common nonlinear crystal of the wave band.
The tunable fiber basic frequency laser light source may is that the modes such as continuous wave, modulation, Q impulse operate.
The beneficial effect of the technical scheme provided by the present invention is that:
1) present invention passes through fundamental frequency light wavelength tuning using Yb or Nd-doped fiber is mixed in 1.06 μm of wider characteristics of gain spectral
The accurate matching for realizing frequency multiplication Raman yellow wavelengths and sodium beacon wavelength 589.159nm, overcomes existing solid Roman laser defeated
Wavelength is difficult to the defect of wavelength needed for resonance matching out；
2) present invention obtains the stokes light of single longitudinal mode, to narrow yellow spectrum using SRS gain without hole burning characteristic
Width realizes the matching with sodium beacon Absorber Bandwidth；
3) present invention avoids the single longitudinal mode requirement for basic frequency laser, therefore compared with existing sodium beacon yellow light technology
Structure is simple, cost economy；
4) SRS frequency conversion process of the invention is space optical path, and inner cavity frequency-doubling mode, high conversion efficiency can be used.
Detailed description of the invention
Fig. 1 is that the structure of the 589nm sodium beacon laser device of optical-fiber laser pumped solid Raman frequency shift provided by the invention is shown
It is intended to；
Fig. 2 is another knot of the 589nm sodium beacon laser device of optical-fiber laser pumped solid Raman frequency shift provided by the invention
Structure schematic diagram.
In attached drawing 1, parts list represented by the reference numerals are as follows:
1-1: basic frequency laser seed source；1-2: fiber amplifier grade；
2: Raman crystal BaWO4；3-1: the first Stokes hysteroscope；
3-2: the second Stokes hysteroscope；4: frequency-doubling crystal LBO；
5: condenser lens.
In attached drawing 2, parts list represented by the reference numerals are as follows:
1: fundamental frequency lasers；
2: Raman crystal YVO4；3-1: the first Stokes hysteroscope；
3-2: the second Stokes hysteroscope；4: frequency-doubling crystal PPLN；
5-1: the first condenser lens；5-2: the second condenser lens.
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.
Embodiment 1:
The embodiment of the invention provides a kind of 589nm sodium beacon laser devices of optical-fiber laser pumped solid Raman frequency shift, should
Laser includes: basic frequency laser seed source 1-1, fiber amplifier grade 1-2, Raman crystal BaWO42, the first Stokes hysteroscope 3-
1, the second Stokes hysteroscope 3-2, frequency-doubling crystal LBO 4 and condenser lens 5；
Wherein, basic frequency laser seed source 1-1 is the semiconductor laser of Single-Mode Fiber Coupling, and wavelength is in 1060-1070nm
It is tunable in range, spectral line width < 0.1nm；Fiber amplifier grade 1-2 uses Yb-doped fiber for Active Optical Fiber, basic frequency laser seed
Source 1-1 and fiber amplifier grade 1-2 constitutes basic frequency laser light source (i.e. fundamental frequency lasers 1)；First Stokes hysteroscope 3-1 is coated with
Basic frequency laser is anti-reflection, the high anti-and 589nm yellow light high reflectivity film stack of stokes light；Second Stokes hysteroscope 3-2 is coated with Si Tuo
The curvature half of high anti-, the 589nm yellow light anti-reflection film system of Ke Si light, the first Stokes hysteroscope 3-1 and the second Stokes hysteroscope 3-2
Diameter is 100mm, and the two constitutes cavity length 190mm.Two panels or multi-disc stokes light resonator mirror constitute Stokes
Optical cavity.
Raman crystal BaWO42 cut for a, and specification is 4 × 4 × 20mm3, it is coated with basic frequency laser, stokes light and yellow light
Anti-reflection film system；Frequency-doubling crystal LBO 4 be θ=90 °,Cutting, specification are 4 × 4 × 10mm3, it is coated with basic frequency laser, stoke
This light and yellow light anti-reflection film system are heated up to~41 ° and meet noncritical phase matching condition；The focal length 100mm of condenser lens 5, plating
There is basic frequency laser anti-reflection film system.
Due to the characteristic of fiber glass matrix, Active Optical Fiber can provide in the wider range near 1.06 μm of emission peaks
Gain, therefore the output wavelength of basic frequency laser can be tuned by frequency-selecting measure；Basic frequency laser incidence Raman crystal BaWO42, it produces
Raw Raman gain, Raman gain increase with basic frequency laser power rise, after gain is greater than loss, in Stokes optical resonance
Stimulated Raman scattering (SRS) occurs under the feedback effect of chamber and forms Stokes light generation.According to the type (Raman of Raman crystal
Frequency displacement) selection fundamental frequency light wavelength.
When specific implementation, Raman crystal BaWO42 Raman main peak frequency displacement is 925cm-1, therefore tune basic frequency laser seed
The wavelength of source 1-1 is 1062.51nm, passes through condenser lens 5 through the amplified 1062.51nm basic frequency laser of fiber amplifier grade 1-2
Enter Raman crystal BaWO after focusing42, more than 1178.318nm stokes light is generated after SRS threshold value, in the first stoke
Oscillation in the resonant cavity that this hysteroscope 3-1 and the second Stokes hysteroscope 3-2 are constituted, since Raman gain is without hole burning characteristic, this
Lentor light is single longitudinal mode operating, and generates 589.159nm single-frequency sodium beacon yellow light by 4 frequency multiplication of frequency-doubling crystal LBO.
In conclusion the advantage of the embodiment of the present invention is, basic frequency laser light source uses main vibration-enlarged structure, wavelength tune
Humorous need to control seed optical wavelength, realize simply, and using inner-cavity structure, (i.e. frequency-doubling crystal LBO 4 is placed in stoke to frequency multiplication process
In this optical cavity), high conversion efficiency.
Embodiment 2:
The embodiment of the invention provides a kind of 589nm sodium beacon laser devices of optical-fiber laser pumped solid Raman frequency shift, should
Laser includes: fundamental frequency lasers 1, Raman crystal YVO42, the first Stokes hysteroscope 3-1, the second Stokes hysteroscope 3-
2, frequency-doubling crystal PPLN 4, the first condenser lens 5-1 and the second condenser lens 5-2.
Wherein, fundamental frequency lasers 1 select narrow band fiber bragg grating to make using Nd-doped fiber as the laser oscillator of gain media
Basic frequency laser line width is less than 0.1nm, and tuning fundamental laser wavelength can be controlled by the stress and temperature of fiber grating；First this support
Gram this hysteroscope 3-1 is coated with that basic frequency laser is anti-reflection, stokes light high reflectivity film stack；Second Stokes hysteroscope 3-2 is coated with Si Tuo
Ke Si light part exports membrane system, and the radius of curvature of the first Stokes hysteroscope 3-1 and the second Stokes hysteroscope 3-2 are
100mm, the two constitute cavity length 190mm；Raman crystal YVO42 cut for a, and specification is 4 × 4 × 20mm3, it is coated with fundamental frequency
Laser and stokes light anti-reflection film system；The specification of frequency-doubling crystal PPLN 4 is 1 × 2 × 20mm3, polarization cycle is 9.45 μm,
It is coated with stokes light and yellow light anti-reflection film system；The focal length of first condenser lens 5-1 is 100mm, is coated with basic frequency laser anti-reflection film
System；The focal length of second condenser lens 5-2 is 100mm, is coated with stokes light anti-reflection film system.
Raman crystal YVO42 Raman main peak frequency displacement is 890cm-1, therefore pass through the temperature or Stress Control of fiber grating
The a length of 1066.48nm of fundamental light wave is selected, 1066.48nm basic frequency laser enters Raman after the first condenser lens 5-1 focusing
Crystal YVO42, more than 1178.318nm stokes light is generated after SRS threshold value, in the first Stokes hysteroscope 3-1 and second
Oscillation in the resonant cavity that Stokes hysteroscope 3-2 is constituted, exports by the second Stokes hysteroscope 3-2, due to Raman gain
Without hole burning characteristic, it is single longitudinal mode operating that basic frequency laser line width, which is less than generated stokes light when Raman crystal Raman linewidth,
It exports 1178.318nm single-frequency stokes light and is focused through the second condenser lens 5-2 and entered by frequency-doubling crystal PPLN 4, frequency multiplication produces
Raw 589.159nm single-frequency sodium beacon yellow light.
In conclusion the advantage of the embodiment of the present invention is, basic frequency laser light source is single oscillator design, and structure is simple
It is at low cost；(i.e. single-frequency stokes light is through the second condenser lens using exocoel quasi-phase matched once-through frequency multiplication for frequency multiplication process
5-2 is focused, into the great frequency-doubling crystal PPLN 4 of effective nonlinear coefficient being placed in outside Stokes optical cavity), efficiency
Height, stable structure.
Embodiment 3
In above-described embodiment 1 and 2, the Active Optical Fiber of basic frequency laser light source 1 can be Yb-doped fiber, or mix Nd light
Fibre, as long as wider gain can be provided about at 1.06 μm, the embodiment of the present invention is without limitation.
Correspondingly, Raman crystal 2 can be BaWO4Or YVO4, it is also possible to CaWO4、BaNO3、GdVO4Etc. common Raman
Main peak frequency displacement is in 900cm-1Neighbouring Raman crystal when specific implementation, selects the fundamental frequency light wavelength to be according to the frequency displacement of Raman crystal
Can, the embodiment of the present invention is without limitation.
Wherein, frequency-doubling crystal 4 can be lbo crystal, PPLN crystal, or BBO, KTP etc. other commonly use it is non-linear
Crystal, when specific implementation, the embodiment of the present invention is without limitation.
In conclusion the purpose of the embodiment of the present invention is to solve the wavelength and line width of current solid Roman Yellow light laser
It is difficult to the problem of matching sodium beacon request, the present invention uses the optical-fiber laser of wide gain spectrum as basic frequency laser light source, in conjunction with nothing
The solid Roman frequency transformation of hole burning is realized the single longitudinal mode sodium beacon yellow light of wavelength 589.159nm, is met in practical application
It needs.
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 (7)
1. a kind of 589nm sodium beacon laser device of optical-fiber laser pumped solid Raman frequency shift, which is characterized in that
Stokes light resonator mirror is anti-reflection to fundamental frequency light, high to stokes light anti-, two panels or multi-disc Stokes optical resonance
Hysteroscope constitutes Stokes optical cavity；
Based on optical fiber basic frequency laser light source vibration-enlarged structure or be single oscillator structure, the fundamental laser wavelength exported can
Tuning, spectral line width are less than the breadth of spectrum line of Raman crystal Raman frequency shift；
Basic frequency laser incidence Raman crystal, when Raman gain is greater than loss, under the feedback effect of Stokes optical cavity
Stimulated Raman scattering occurs and forms Stokes light generation；Fundamental frequency light wavelength is selected according to the Raman frequency shift of Raman crystal used,
Being allowed to the Stokes optical wavelength obtained after Raman frequency shift is 1178.318nm；
Since Raman gain is without hole burning characteristic, basic frequency laser line width is less than generated when Raman crystal Raman linewidth
1178.318nm stokes light is single longitudinal mode；1178.318nm stokes light is exported by frequency-doubling crystal frequency multiplication
589.159nm sodium beacon yellow light.
2. a kind of 589nm sodium beacon laser device of optical-fiber laser pumped solid Raman frequency shift according to claim 1, special
Sign is that the main vibration-enlarged structure constitutes basic frequency laser light source by basic frequency laser seed source and fiber amplifier grade:
The basic frequency laser seed source is the semiconductor laser of Single-Mode Fiber Coupling, and the fiber amplifier grade, which uses, mixes ytterbium or mix
The Active Optical Fiber of neodymium.
3. a kind of 589nm sodium beacon laser device of optical-fiber laser pumped solid Raman frequency shift according to claim 1, special
Sign is that the wavelength of the semiconductor laser is tunable within the scope of 1060-1070nm, spectral line width < 0.1nm.
4. a kind of 589nm sodium beacon laser device of optical-fiber laser pumped solid Raman frequency shift according to claim 1, special
Sign is that the single oscillator structure includes: fundamental frequency lasers；
The fundamental frequency lasers select narrow band fiber bragg grating to make to mix ytterbium or neodymium-doped fiber as the laser oscillator of gain media
Basic frequency laser line width is less than 0.1nm, passes through stress and temperature the control tuning fundamental laser wavelength of fiber grating.
5. a kind of 589nm sodium beacon laser device of optical-fiber laser pumped solid Raman frequency shift according to claim 1, special
Sign is, the Raman crystal are as follows: barium tungstate or vanadate.
6. a kind of 589nm sodium beacon laser device of optical-fiber laser pumped solid Raman frequency shift according to claim 1, special
Sign is, the frequency-doubling crystal are as follows: three lithium borates, barium metaborate or periodically poled lithium niobate.
7. a kind of 589nm sodium beacon laser device of optical-fiber laser pumped solid Raman frequency shift according to claim 1, special
Sign is, the optical fiber basic frequency laser light source are as follows: continuous wave, modulation or Q impulse mode operate.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111048975A (en) * | 2019-12-27 | 2020-04-21 | 河北工业大学 | LiNbO as blue light LD pump Pr3Sodium yellow Raman laser |
| CN113224629A (en) * | 2021-04-13 | 2021-08-06 | 华南理工大学 | Tunable single-frequency Raman laser |
| CN114512890A (en) * | 2022-02-21 | 2022-05-17 | 山东飞博赛斯光电科技有限公司 | Wide tuning single-frequency light source of new communication wave band |
| CN116979356A (en) * | 2023-08-14 | 2023-10-31 | 上海频准激光科技有限公司 | 589nm laser with compact structure |
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| US6704331B2 (en) * | 2001-04-11 | 2004-03-09 | The Regents Of The University Of California | Synthetic guide star generation |
| US20170179676A1 (en) * | 2004-12-07 | 2017-06-22 | Imra America, Inc. | Yb: and nd: mode-locked oscillators and fiber systems incorporated in solid-state short pulse laser systems |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111048975A (en) * | 2019-12-27 | 2020-04-21 | 河北工业大学 | LiNbO as blue light LD pump Pr3Sodium yellow Raman laser |
| CN113224629A (en) * | 2021-04-13 | 2021-08-06 | 华南理工大学 | Tunable single-frequency Raman laser |
| CN114512890A (en) * | 2022-02-21 | 2022-05-17 | 山东飞博赛斯光电科技有限公司 | Wide tuning single-frequency light source of new communication wave band |
| CN116979356A (en) * | 2023-08-14 | 2023-10-31 | 上海频准激光科技有限公司 | 589nm laser with compact structure |
| CN116979356B (en) * | 2023-08-14 | 2024-03-22 | 上海频准激光科技有限公司 | 589nm laser with compact structure |
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| CN109494558B (en) | 2020-10-23 |
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