CN107946878A - A kind of 0.9 mu m waveband ultra-low noise narrow-linewidth single frequency fiber laser light source - Google Patents

A kind of 0.9 mu m waveband ultra-low noise narrow-linewidth single frequency fiber laser light source Download PDF

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Publication number
CN107946878A
CN107946878A CN201711474001.XA CN201711474001A CN107946878A CN 107946878 A CN107946878 A CN 107946878A CN 201711474001 A CN201711474001 A CN 201711474001A CN 107946878 A CN107946878 A CN 107946878A
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laser
frequency
light source
low noise
linewidth
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杨昌盛
徐善辉
杨中民
黄振鹏
冯洲明
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Hengqin Donghui Technology Co Ltd
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Hengqin Donghui Technology Co Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES 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
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/005Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
    • H01S3/0057Temporal shaping, e.g. pulse compression, frequency chirping
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES 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
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06Construction or shape of active medium
    • H01S3/063Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067Fibre lasers
    • H01S3/06791Fibre ring lasers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES 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
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/08Construction or shape of optical resonators or components thereof
    • H01S3/081Construction or shape of optical resonators or components thereof comprising three or more reflectors
    • H01S3/083Ring lasers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES 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
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/10007Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES 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
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/10084Frequency control by seeding
    • H01S3/10092Coherent seed, e.g. injection locking
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES 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
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/11Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
    • H01S3/1106Mode locking
    • H01S3/1112Passive mode locking
    • H01S3/1115Passive mode locking using intracavity saturable absorbers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES 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
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/131Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
    • H01S3/1315Stabilisation 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 gain saturation
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES 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
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/136Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling devices placed within the cavity
    • H01S3/137Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling devices placed within the cavity for stabilising of frequency

Abstract

The invention discloses a kind of 0.9 mu m waveband ultra-low noise narrow-linewidth single frequency fiber laser light source, the light source includes:0.9 μm of single-frequency laser resonator of operation wavelength, wavelength division multiplexer, single mode semiconductor pump laser, photo-coupler, reflective optical system, optoisolator, laser saturation amplifying device, light filter module.A part of single-frequency laser injection that the present invention is exported 0.9 mu m waveband laser resonator by reflective optical system is returned in resonator, can suppress to export the intensity noise of laser in the range of broad frequency band, and realize the significantly compression of output laser linewidth;The intensity noise of output laser is further reduced by laser saturation amplifying device again, while realizes the power amplification of output laser, it is final to produce 0.9 μm of operation wavelength, ultra-low noise, narrow linewidth, the output of high-power single frequency fiber laser.The laser light source can not only be further used for obtaining high-performance single-frequency blue laser, but also may be used as the high-performance optical fiber laser pumping source of rare earth ion doped glass or optical fiber.

Description

A kind of 0.9 mu m waveband ultra-low noise narrow-linewidth single frequency fiber laser light source
Technical field
The present invention relates to the noise suppressed and linewidth compression technology of optical fiber laser, and in particular to a kind of 0.9 μ of operation wavelength M, ultra-low noise, narrow linewidth, high-power single frequency fiber laser light source.
Background technology
In recent years, since single frequency optical fiber laser has high line width, signal-to-noise ratio, excellent stability and the vibration of single longitudinal mode Many advantages, such as output, make one of research hotspot of laser field.Single frequency optical fiber laser closes beam, height in coherent laser The fields such as precision spectrum analysis, Fibre Optical Sensor and nonlinear frequency conversion have very high application value.Swash currently for single-frequency The research of light device is mainly focused on the lifting to performances such as its line width, power scale, noises, wherein noise and laser linewidth conduct The important indicator of optical fiber laser is weighed, is the key point place for restricting its application level.Such as in high-precision sensing, in laser Noise can be mixed with detectable signal and be changed into system noise, so as to influence its detection accuracy and sensitivity;And in microwave photon The very narrow long coherence length light source of line width is then needed Deng field.
Ytterbium single frequency optical fiber laser is mixed less than 1 μm particularly with operation wavelength, nonlinear frequency conversion can be combined and produced Raw single-frequency blue laser.Compared with existing Several problems of evaluating laser beam quality of unstable, the former can possess good beam quality, volume at the same time The advantages that small, long lifespan.Further, since mix ytterbium single frequency optical fiber laser(Wavelength<1μm)Excellent properties, low noise can be used as Sound pumping source, fibre laser oscillator and fiber amplifier for fibre core pumping doping with rare-earth ions.Thus, there is an urgent need to send out Open up a kind of ultra-low noise, narrow linewidth, high power, the single frequency fiber laser light source of 0.9 μm of operation wavelength.
The scheme of currently acquired low noise single-frequency laser is more, and common implementation method has based on mode cleaner and photoelectricity The mode of feedback.Coupling exports a part of light after laser beam is by mode cleaner with filtering characteristic, then is visited through photoelectricity The processes such as device detection, power amplification, feedback control are surveyed, finally realize noise suppressed.But the program causes whole laser structure It is complicated, while the requirement to external environment is very high.Electro-optical feedback be then by introduce an electro-optical feedback circuit come Optimization of the Pump Drive current so as to fulfill output laser noise is controlled, but the program is limited to the responsive bandwidth of reponse system And response speed, actual result are unsatisfactory.And the compression for laser linewidth then mainly uses brillouin gain spectral line width pressure Contracting;Or by way of interfering with injection photomixing outside chamber and to form refractive-index grating and gain grating modeling, and then obtain narrow Line width single-frequency laser exports.It is less than 1 μm of single frequency fiber for obtaining ultra-low noise, narrow linewidth, high power, operation wavelength at the same time Laser result of study, is reported less at present.
The content of the invention
It is an object of the invention to overcome deficiency of the prior art, a kind of 0.9 mu m waveband ultra-low noise narrow linewidth is proposed Single frequency fiber laser light source.In 0.9 μm of operation wavelength(Short-wave band)On the basis of single-frequency laser resonator, pass through self-injection locking Mode combination laser saturation enlarge-effect, while laser linewidth is compressed, on the one hand realizes that the intensity in broad frequency range is made an uproar Sound suppresses;On the other hand power amplification is carried out to single-frequency laser, so as to obtain ultra-low noise, narrow linewidth, the single-frequency of relatively high power Optical-fiber laser exports.
The purpose of the present invention is achieved through the following technical solutions.
A kind of 0.9 mu m waveband ultra-low noise narrow-linewidth single frequency fiber laser light source, the single-frequency laser of 0.9 μm of its operation wavelength Resonator, wavelength division multiplexer, single mode semiconductor pump laser, photo-coupler, reflective optical system, optoisolator, laser saturation are put Big device and light filter module;Single-frequency laser resonator, wavelength division multiplexer, photo-coupler, optoisolator, laser saturation amplification dress Put and be sequentially connected with light filter module;Single mode semiconductor pump laser is by the pump ports of wavelength division multiplexer to single-frequency laser Resonator carries out fibre core pumping, and the single-frequency laser of single-frequency laser resonator output is entered by the signal port of wavelength division multiplexer After photo-coupler, a part of single-frequency laser returns to single-frequency laser resonator by reflective optical system injection, and another part single-frequency swashs Light enters laser saturation amplifying device by optoisolator, and last single frequency fiber laser is defeated by the output terminal of light filter module Go out.
Described 0.9 μm of single-frequency laser resonator of operation wavelength includes but not limited to the structure types such as linear cavity, annular chamber.
The laser working medium of the single-frequency laser resonator is fibre core Uniform Doped Yb3+Or Nd3+Light emitting ionic it is more Component glass optical fiber, matrix material of optic fibre include but not limited to phosphate glass, germanate glass, tellurate glass, silicate The component glass such as glass.
The reflective optical system includes but not limited to high reflectance grating, fiber reflector, fiber optic loop etc..
The laser saturation amplifying device includes but not limited to semiconductor optical amplifier, gain fibre amplifier, non-thread Property power amplifier etc..
The light filter module includes but not limited to the combination of one or several devices, as optical fiber narrow band filter, Wave filter that F-P wave filters, optical circulator are formed together with fiber grating etc..
Compared with prior art, the solution have the advantages that:The list of 0.9 μm of single-frequency laser resonator output of operation wavelength Frequency laser is returned to a part of Laser feedback in resonator by way of self seeding, can realize output laser linewidth at the same time Compression and intensity noise suppression, in conjunction with laser saturation amplifying device, to the intensity noise in broad frequency range into traveling The suppression of one step, and improve its laser output power scale.Self-injection locking and the amplification of laser saturation are combined by the present invention, are carried A kind of effective means for realizing 0.9 mu m waveband ultra-low noise narrow-linewidth single frequency fiber laser light source is supplied.
Brief description of the drawings
Fig. 1 is 0.9 mu m waveband ultra-low noise narrow-linewidth single frequency fiber laser light source principle schematic in the embodiment of the present invention.
In figure:1-operation wavelength, 0.9 μm of single-frequency laser resonator, 2-wavelength division multiplexer, the pumping of 3-single mode semiconductor swash Light device, 4-photo-coupler, 5-reflective optical system, 6-optoisolator, 7-laser saturation amplifying device, 8-light filter module.
Embodiment
The embodiment of the present invention is further described, it is necessary to which what is illustrated is with specific example below in conjunction with the accompanying drawings The scope of protection of present invention is not limited to the scope of embodiment statement.
As shown in Figure 1, a kind of 0.9 mu m waveband ultra-low noise narrow-linewidth single frequency fiber laser light source, including operation wavelength 0.9 μm single-frequency laser resonator 1, wherein resonator is generally by mixing Yb3+Or Nd3+0.9 μ of rare earth ion high-gain optical fiber and centre wavelength The linear short cavity that m fiber gratings are formed together, wavelength division multiplexer 2, single mode semiconductor pump laser 3, photo-coupler 4, light is anti- Emitter 5, optoisolator 6, laser saturation amplifying device 7, light filter module 8.Structural relation between each component is:Single mode is partly led Body pump laser 3 carries out fibre core pumping by the pump ports of wavelength division multiplexer 2 to single-frequency laser resonator 1, and resonator is defeated After the single-frequency laser gone out enters photo-coupler 4 by the signal port of wavelength division multiplexer 2, a part of laser passes through reflective optical system 5 injections are returned in resonator, and another part laser enters laser saturation amplifying device 7, last single-frequency light by optoisolator 6 Fine laser is exported by the output terminal of light filter module 8.The laser working medium of single-frequency laser resonator 1 is to mix Nd in this example3+ Phosphate glass optical fiber, single mode semiconductor pump laser 3 are 808nm single mode semiconductor lasers.Single mode semiconductor laser Backward pump is carried out to 930nm single-frequency lasers resonator 1 by the wavelength division multiplexer 2 of a 800/930nm.From wavelength division multiplexer The laser center wavelength of 2 signal ports output is 930.15nm, then passes through one 10:90 photo-coupler 4, wherein optical coupling The reflective optical system 5 that 10% port of device 4 is formed with by fiber reflector is connected, and a part is exported laser self seeding return laser light In resonator, realize intensity noise suppression and laser linewidth compression to exporting laser, pass through and be appropriately extended and optimization optical coupling Fiber lengths between device 4 and reflective optical system 5, can obtain the narrow linewidth list of Asia kHz magnitudes in 90% port of photo-coupler 4 Frequency laser exports.
Although self seeding mode can realize intensity noise inhibition by a relatively large margin in broad frequency range, its The relaxation oscillation peak of laser can not effectively be suppressed, and a series of harmonic peaks occur in high band, influence making an uproar for whole laser Acoustic performance.In order to further suppress to export the intensity noise of laser and obtain the single-frequency laser output of relatively high power, from coupler The laser of 90% end output is entered among laser saturation amplifying device 7 after a 930nm optoisolator 6 again, in this example The laser saturation amplifying device 7 used is a high efficiency, the semiconductor optical amplifier of high bandwidth.Put by adjusting semiconductor light The driving current of big device, is allowed to work in the saturated condition, then can effectively suppress high band relaxation oscillation peak and by Harmonic peaks caused by self seeding, and realize that overall intensity noise suppresses in nearly 50MHz or even higher band limits.This Outside, semiconductor optical amplifier can introduce obvious amplified spontaneous emission light during the work time(ASE), make the noise of output laser Than deteriorating, then by light filter module 8, the light filter module 8 used in this example is the band logical of a three dB bandwidth about 1nm Type optical fiber filter, for filtering out the ASE of generation.Finally realize that ultra-low noise, narrow linewidth, high power 930nm single frequency fibers swash Light output.

Claims (7)

  1. A kind of 1. 0.9 mu m waveband ultra-low noise narrow-linewidth single frequency fiber laser light source, it is characterised in that including:0.9 μ of operation wavelength The single-frequency laser resonator of m(1), wavelength division multiplexer(2), single mode semiconductor pump laser(3), photo-coupler(4), light reflection Device(5), optoisolator(6), laser saturation amplifying device(7)With light filter module(8);Single-frequency laser resonator(1), wavelength-division it is multiple Use device(2), photo-coupler(4), optoisolator(6), laser saturation amplifying device(7)With light filter module(8)It is sequentially connected with;It is single Mould semiconductor pump laser(3)Pass through wavelength division multiplexer(2)Pump ports to single-frequency laser resonator(1)Carry out fibre core pump Pu, the single-frequency laser of single-frequency laser resonator output pass through wavelength division multiplexer(2)Signal port enter photo-coupler(4)It Afterwards, a part of single-frequency laser passes through reflective optical system(5)Injection returns to single-frequency laser resonator, and another part single-frequency laser passes through light Isolator(6)Enter laser saturation amplifying device(7), last single frequency fiber laser passes through light filter module(8)Output terminal Output.
  2. 2. a kind of 0.9 mu m waveband ultra-low noise narrow-linewidth single frequency fiber laser light source according to claim 1, its feature exist In:The single-frequency laser resonator(1)For linear cavity or ring cavity structure.
  3. 3. a kind of 0.9 mu m waveband ultra-low noise narrow-linewidth single frequency fiber laser light source according to claim 1, its feature exist In:The single-frequency laser resonator(1)Laser working medium be fibre core Uniform Doped Yb3+Or Nd3+The multicomponent of light emitting ionic Glass optical fiber, matrix material of optic fibre are phosphate glass, germanate glass, tellurate glass or silicate glass.
  4. 4. a kind of 0.9 mu m waveband ultra-low noise narrow-linewidth single frequency fiber laser light source according to claim 1, its feature exist In:The reflective optical system(5)For high reflectance grating, fiber reflector or optical fiber ring structure.
  5. 5. a kind of 0.9 mu m waveband ultra-low noise narrow-linewidth single frequency fiber laser light source according to claim 1, its feature exist In:The laser saturation amplifying device(7)For semiconductor optical amplifier, gain fibre amplifier or nonlinear power amplifier.
  6. 6. a kind of 0.9 mu m waveband ultra-low noise narrow-linewidth single frequency fiber laser light source according to claim 1, its feature exist In:The smooth filter module(8)For the combination of one or more device.
  7. 7. a kind of 0.9 mu m waveband ultra-low noise narrow-linewidth single frequency fiber laser light source according to claim 6, its feature exist In:The smooth filter module(8)For optical fiber narrow band filter or F-P wave filters, or it is optical circulator structure together with fiber grating Into wave filter.
CN201711474001.XA 2017-12-29 2017-12-29 A kind of 0.9 mu m waveband ultra-low noise narrow-linewidth single frequency fiber laser light source Pending CN107946878A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110350388A (en) * 2019-06-05 2019-10-18 华南理工大学 A kind of 1.0 μm of ultra-low noise single frequency optical fiber lasers
CN110459939A (en) * 2019-07-16 2019-11-15 中国科学院合肥物质科学研究院 A kind of actively Q-switched optical fiber laser of narrow linewidth narrow spaces high repetition frequency
CN111541137A (en) * 2020-04-02 2020-08-14 华南理工大学 Low-noise high-power single-frequency fiber laser and method
CN112018587A (en) * 2020-07-27 2020-12-01 横琴东辉科技有限公司 System and method for inhibiting SBS (styrene-butadiene-styrene) to realize high-power single-frequency fiber laser output

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CN102306897A (en) * 2011-08-22 2012-01-04 华南理工大学 Ultra narrow linewidth low noise high power single frequency fiber laser
CN105529607A (en) * 2016-01-31 2016-04-27 华南理工大学 Broadband single-frequency fiber laser intensity noise suppression device for achieving nearly schottky noise limit

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CN105529607A (en) * 2016-01-31 2016-04-27 华南理工大学 Broadband single-frequency fiber laser intensity noise suppression device for achieving nearly schottky noise limit

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110350388A (en) * 2019-06-05 2019-10-18 华南理工大学 A kind of 1.0 μm of ultra-low noise single frequency optical fiber lasers
CN110459939A (en) * 2019-07-16 2019-11-15 中国科学院合肥物质科学研究院 A kind of actively Q-switched optical fiber laser of narrow linewidth narrow spaces high repetition frequency
CN110459939B (en) * 2019-07-16 2021-05-04 中国科学院合肥物质科学研究院 Active Q-switched fiber laser with narrow line width, narrow pulse width and high repetition frequency
CN111541137A (en) * 2020-04-02 2020-08-14 华南理工大学 Low-noise high-power single-frequency fiber laser and method
CN112018587A (en) * 2020-07-27 2020-12-01 横琴东辉科技有限公司 System and method for inhibiting SBS (styrene-butadiene-styrene) to realize high-power single-frequency fiber laser output

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Application publication date: 20180420