CN102882108A - Network coherent amplification method for all-fiber chirped pulses - Google Patents
Network coherent amplification method for all-fiber chirped pulses Download PDFInfo
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- CN102882108A CN102882108A CN2012103456708A CN201210345670A CN102882108A CN 102882108 A CN102882108 A CN 102882108A CN 2012103456708 A CN2012103456708 A CN 2012103456708A CN 201210345670 A CN201210345670 A CN 201210345670A CN 102882108 A CN102882108 A CN 102882108A
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Abstract
The invention discloses a network coherent amplification method for all-fiber chirped pulses. The method comprises the following steps of: pre-amplifying seed light by utilizing a low-noise fiber amplifier; splitting pre-amplified laser pulses into a plurality of paths by using a fiber beam splitter, wherein each path of light passes through a zero-frequency pre-compensation type cascade amplification system and a pulse width compression system respectively; and coherently synthesizing a plurality of paths of light into a path of high-power laser by using a fiber beam combiner. By a coherent amplification network, the problems of thermal effect, pulse deformation, noise and the like of direct amplification of light pulses are solved; and in addition, by a pre-compensation technology, carrier-envelope phase locking is stable and high in accuracy and output power compared with the conventional method of performing amplification, measuring a carrier phase by using an f-to-2f system and controlling a laser by using the feedback of a phase-locked circuit.
Description
Technical field
The present invention relates to laser science and technical field, what be specifically related to is amplification, carrier envelope phase control and the Laser coherent combining technology of high power ultra-short laser pulse.
Background technology
High Power Femtosecond Laser frequency comb technology (being called for short the high power light comb) is the physical important means of Research foundation, is advancing people for the time, frequency, and there is vital effect the certainty of measurement aspect of the fundamental physical quantities such as length.Simultaneously, as a basic technology, the high power light comb is significant for the development of many high and new technologies, and for example, light comb spectrum high-resolution characteristic can well be applied to accurate spectrum, light clock, frequency synthesis and measurement; The precise and stable characteristic of its phase place can be used for large molecular imaging, quantum coherent control, accurate imaging, accurate timing location, etc.; Its high power, the high-energy characteristic can be used for the generation of ultraviolet comb and excite high-order harmonic generation Ah second ultrashort pulse, etc.
This high power light comb technology is mainly based on the locking (f to the repetition rate of laser pulse
rLocking) technology, to carrier envelope phase (CEP, i.e. the zero-frequency f of laser of laser pulse
0) accurate control technique, and the power amplifier technology of laser pulse.Since nearly ten years, light comb technology (namely to the repetition rate of laser pulse and CEP time locking) has obtained huge progress.2004, realize that at fiber laser live width is about the Er-doped fiber light comb of 10mHz.2005, reported that the Yb dosed optical fiber light of phase place long-term stability is combed.Aspect the high power light comb, current scheme is that 1. usefulness double clad ytterbium optical fiber are as the gain media of light comb oscillator, directly output high-power pulse at present.2008, the JILA laboratory of University of Colorado utilized this method to obtain the near infrared light comb of 10W.But there is serious deficiency in this method aspect the light comb that obtains high power more (near hectowatt).Oscillator inner laser pulse power is too high, can cause laser pulse after multiple oscillation, distorted and division, thus the restriction people are to the control precision of laser repetition rate and CEP.2. adopt fiber amplifier technology or chirped pulse amplification, the seed light of light comb oscillator output is directly amplified, thereby obtain power light comb.2010, IMRA America Inc. obtained the near infrared light comb of 80W by this method.This method can be avoided the division of high energy pulse in laser cavity, but CEP can be subject to the impact of the additional noise of power amplifier.These noises comprise that the stability of a system that thermal effect causes is poor, and the dispersion interaction that high-order nonlinear causes makes the serious broadening of pulse duration, etc.So the scheme of existing acquisition high power light comb mainly is subject to the laser amplifier process to the negative effect of light comb carrier envelope phase control precision, and to the restriction of the time width of laser pulse.
In sum, although the generation scheme of superlaser light comb is a lot, all there are more or less technical deficiency and defective.
Summary of the invention
The method that provides a kind of full optical fiber laser pulse coherence network to amplify is provided for above-mentioned the deficiencies in the prior art part.
The method is utilized the laser pulse synthetic technology that is concerned with, with the relevant synthetic high energy pulse of the laser pulse after amplifying separately.Simultaneously, the method is also carried out Real Time Monitoring and adjustment by zero-frequency precompensation technology to the carrier envelope phase that amplifies pulse, the zero-frequency noise of introducing to eliminate amplification system.This method has not only solved the difficulty of Sing plus power amplification, as amplifying division and the distortion of afterpulse, and has effectively suppressed the zero-frequency noise that high-order dispersion in the amplification process and amplifier are introduced.
The object of the invention realizes being finished by following technical scheme:
A kind of full fiber chirped pulse network amplification method that is concerned with, the method comprises the steps:
One, utilize optical fiber amplifier having low noise that seed light is amplified in advance;
One, the laser pulse after will amplifying in advance is divided into the N road by fiber optic splitter, and described N is the integer greater than 1;
Two, every road light is separately respectively through cascade amplification system and the pulse duration compressibility of a zero-frequency precompensation formula;
Three, multi-path light is by relevant synthetic one road high power laser light of optical-fiber bundling device.
As the improvement of technique scheme, further technical scheme of the present invention is as follows:
In above-mentioned steps four, use the relevant Shu Fangfa that closes of network type, the method is by the mode of pulse coherence, and the distribution of light intensity E of laser pulse is superposeed, and peak power P and field intensity E square are directly proportional, and the peak power of exporting at last pulse has been exaggerated N
2Doubly, increased N doubly than general peak power stack, in order to improve the power of laser pulse.
Adopted a kind of zero-frequency precompensation method based on acousto-optic frequency shifter (AOFS) in above-mentioned steps three, the zero-frequency noise in the amplifier is accurately controlled, its performing step is:
The modulating frequency of A, acousto-optic phase-modulator is f
n, get its 1 order diffraction light as output light, then exporting light frequency is f-f
n, wherein f is the incident light frequency of non-modulated;
B, laser pulse has obtained an additive phase noise frequency f in amplification process
0(zero-frequency), the frequency of laser becomes f-f after then amplifying
n+ f
0,
C, with f
0Signal extracts by the self-reference light path, and feeds back to the acousto-optic phase-modulator, as its modulating frequency (that is, f
n=f
0), just can offset in advance the zero-frequency noise that amplification system is introduced, obtain at last the Laser output of carrier envelope stable phase.
The course of work of the present invention is: utilize optical fiber amplifier having low noise that seed light is prevented greatly; Laser pulse after will amplifying in advance again is divided into the N road by fiber optic splitter, and every road light is separately respectively through cascade amplification system and the pulse duration compressibility of a zero-frequency precompensation formula; At last, N road light is by relevant synthetic one road high power laser light of optical-fiber bundling device.
Described zero-frequency precompensation amplifying technique refers to by the acousto-optic phase-modulator frequency of incident laser be modulated.The modulating frequency of acousto-optic phase-modulator is f
n, and the 1 order diffraction light of getting it is as output light, then exporting light frequency is f-f
n, wherein f is the incident light frequency of non-modulated.Be amplified to high power state after the laser process cascaded optical fiber amplification system after the modulation.Pulse in amplification process is owing to be subject to the impact of thermal effect and effect of dispersion in the amplifier, and the laser after the amplification will obtain an additive phase noise frequency f
0(zero-frequency), the frequency of laser becomes f-f after amplifying this moment
n+ f
0Now with f
0Signal extracts by the self-reference light path, and feeds back to the acousto-optic phase-modulator, as its modulating frequency (that is, f
n=f
0), just can offset in advance the zero-frequency noise that amplification system is introduced, obtain at last the Laser output of carrier envelope stable phase.
Describedly relevant close the bundle technology, refer to that multi beam (two bundles and more than two bundles) pulse laser carries out the stack of distribution of light intensity by relevant mode, exports a stable high power pulse at last.The stack of general pulse is the stack of luminous intensity.Because in the constant situation of other condition, the peak power of light pulse is proportional to luminous intensity I, so the stack of intensity can be understood as the stack of peak power.Suppose that wherein the peak power of every light beam is P, after N bundle light directly closed bundle, pulse peak power became N * P; And after closing bundle by relevant mode, the electric field strength A of pulse superposes.Consider the identical situation of phase place of N bundle light, then passable is the Shu Guang that closes of N * A to electric field strength.At this moment, the distribution of light intensity of pulse is (N * A)
2=N
2* I, corresponding peak power is N
2* P.So relevant synthetic method is conducive to improve the power of laser pulse, guarantee simultaneously the phase stabilization of each frequency content in the pulse.
Beneficial effect of the present invention is: utilize the relevant network that amplifies to overcome the problems such as the thermal effect that the direct amplification of light pulse faces, pulse distortion, noise, the precompensation technology also makes the first amplification in the past of carrier envelope phase locking ratio in addition, use again f-to-2f systematic survey carrier phase, method with phase lock circuitry FEEDBACK CONTROL laser is more steady, precision is higher, and the power of output also can be higher.
Description of drawings
Accompanying drawing 1 is flow chart of the present invention;
Accompanying drawing 2 is the flow chart of zero-frequency precompensation formula amplifying technique;
Accompanying drawing 3 is the relevant device schematic diagram that amplifies network of full fiber chirped pulse;
Accompanying drawing 4 is the schematic diagram of two-way pulsed light beam coherent superposition;
Embodiment
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing:
Shown in accompanying drawing 1-3, symbol is expressed as follows respectively among the figure: L is the optical fiber comb, and A is prime amplifier, B1 is the 1:6 beam splitter, and C is full optical fiber acousto-optic frequency shifter (AOFS), D1, D2 is fibre optic isolater, E1, E2 are large mould area double-cladding optical fiber (LMA-DCF), and F1, F2 are optical fiber type wavelength division multiplexer (WDM), and G1, G2 are the semiconductor laser pumping sources, the pulse shortener that H is comprised of grating pair, J is 1:99 coupling fiber follower, and B2 is the 6:1 coupler, and I represents self-referential system.
The related concrete technology of present embodiment is as described below:
At first be that network technology is amplified in cascade, first the seed light of the femtosecond magnitude of pre-amplification carried out beam splitting, be divided into the N bundle, the power of every Shu Guang is P; Through a cascade amplification system, this amplification system is comprised of multistage high-power fiber amplifier every bundle light respectively, and the power of every Shu Guang rises to P ' after amplifying; Then be the pulse shortener of η through diffraction efficiency respectively, make the width of laser pulse remain on the fs magnitude; With a bundling device N is restrainted the photosynthetic light beam that becomes at last, power is N η P '.
Next is zero-frequency precompensation technology, before every light beam enters separately amplification system, all places a full fiber type acousto-optic frequency shifter (AOFS), and every Shu Guang is divided into 1 grade and 0 grade of two-way, and wherein 0 grade of light is abandoned, and 1 grade of light is by frequency displacement-f
n, and be admitted to amplification system and carry out power amplification; Pulse after the amplification owing to be subject to the impact of amplifier noise, has produced the carrier envelope position f that drifts about mutually
0This drift value is detected after by the self-reference light path, and is fed to acousto-optic phase frequency shifter, like this modulating frequency f of frequency shifter
n=f
0, so that the frequency shift amount of 1 grade of light can offset with the zero-frequency drift value that amplifier noise is introduced, thereby realize amplifying the stable of pulse carrier envelope phase.
Be the relevant synthetic technology of pulse network at last, the multiple laser of carrier envelope stable phase is synthesized a branch of high power laser light by bundling device.Relative phase between each pulse before the key of this technology is to synthesize will reach a higher stability, also just needing to realize relevant synthesizing between the minimum light beam of carrier envelope phase noise, so the basis of the relevant synthetic technology of network is the precompensation technology.A key point in this technology is the pulse coherence stack.Provided the theoretical modeling result of pulse coherence stack among Fig. 4.Take two pulsed lights that pulse duration is identical, phase place is identical, amplitude is identical as example (Fig. 4 is upper left), this moment N=2, A=1, I=1.Mutually long phenomenon of electric field strength occurs after the two-beam coherent superposition, see that Fig. 4 is upper right, the electric field strength of composite pulse is A '=2.Because luminous intensity is the quadratic relationship of electric field strength, then the luminous intensity of composite pulse is I '=A '
2=4, see Fig. 4 bottom right.And after incoherent pulses closed bundle, the simple addition of luminous intensity was I ' '=2 * I=2, sees Fig. 4 lower-left.Because pulse peak power is proportional to luminous intensity, so the peak power after visible coherent pulse synthesizes is 2 times of incoherent composite pulse.
Implementation is as follows:
In the present embodiment, the laser of optical fiber comb L output is mixed the ytterbium monomode fiber through one section and is amplified in advance A, through beam splitter B1 light beam is divided into 6 equal portions again, enters respectively 6 branches of fiber amplifier network.The structure of every light path is identical, here only wherein one the road to specifically describe as example.After laser enters the fiber amplifier network, be subject to first the modulating action of acousto-optic frequency shifter C, produce 1 grade of light, its frequency is f-f
nThen laser enters first order amplifier.This amplifier is by fibre optic isolater D1, and large mould area double-cladding photonic crystal fiber E1 and high-power semiconductor laser G1 form.Wherein the effect of fibre optic isolater D1 is after preventing that laser from running into minute surface, enters laser along the reflection of former road, destroys the mode-lock status of laser; The effect of large mould area double-cladding photonic crystal fiber E1 is the gain media that serves as laser; High-power semiconductor laser G1 is the pumping source of whole first order amplifier, for amplifier provides energy.Then, pulse enters second level amplifier, and its structure is identical with first order amplifier.Average power through single channel pulse after the dual-stage amplifier rises to P ', and laser frequency is f-f
n+ f
0Because in the amplification process, the width of laser pulse is broadened under the dispersion interaction of optical fiber, so the pulse after amplifying needs again through a pulse shortener that is comprised of grating pair, to guarantee that its pulse duration is in the fs magnitude.Compressed laser is through the fiber coupler H of a 1:99 afterwards, and wherein fraction light (1%) is admitted to self-referential system I(f-2f system) generation beat signal (zero-frequency noise f
0), this signal is fed to acousto-optic frequency shifter B, and as its modulating frequency, then f
nBe set to f
0, the carrier envelope phase noise of such 1 grade of light will be suppressed effectively; In addition after the bundling device B2 of most of laser (99%) through a 6:1, with relevant one road high power laser light that synthesizes of other 5 road light.
Thus, the relevant network technology of amplifying of the full fiber chirped pulse that whole scheme proposes not only can realize high-power femto-second laser pulse output, can also the carrier envelope phase of high-power laser pulse accurately be locked and control simultaneously.
The maximum characteristics of native system and advantage utilize the relevant network technology of amplifying of full fiber chirped pulse to overcome the problems such as the thermal effect that the direct amplification of light pulse faces, pulse distortion, noise with regard to being; Utilize the network type amplification, pulse is divided into multichannel, the independent amplification, and adopt the precompensation technology accurately to control the carrier envelope phase frequency (zero-frequency) of each road laser, so that it is relevant synthetic that each shunt laser can be realized at last smoothly.The method that the method is combed than realization high power light in the past more is conducive to reduce the negative effect that amplifier causes at time and frequency zone femto-second laser pulse, and the power of its output also is higher than the mode of direct amplification.
Of particular note: be a kind of execution mode that provides in conjunction with particular content as mentioned above, can not assert that implementation of the present invention is confined to these explanations.All and structure of the present invention, device etc. are approximate, identical, or conceive for the present invention and to make some technology deduction or replace under the prerequisite, all should be considered as protection scope of the present invention.
Claims (3)
1. the relevant amplification method of a full fiber chirped pulse network, it is characterized in that: the method comprises the steps:
One, utilize optical fiber amplifier having low noise that seed light is amplified in advance;
Two, the laser pulse after will amplifying in advance is divided into the N road by fiber optic splitter, and described N is the integer greater than 1;
Three, every road light is separately respectively through cascade amplification system and the pulse duration compressibility of a zero-frequency precompensation formula;
Four, multi-path light is by relevant synthetic one road high power laser light of optical-fiber bundling device.
2. the relevant amplification method of a kind of full fiber chirped pulse network according to claim 1, it is characterized in that: in above-mentioned steps four, use the relevant Shu Fangfa that closes of network type, the method is by the mode of pulse coherence, the distribution of light intensity E of laser pulse is superposeed, power P and field intensity E square are directly proportional, and the peak power of exporting at last pulse has been exaggerated N
2Doubly.
3. the relevant amplification method of a kind of full fiber chirped pulse network according to claim 1, it is characterized in that: in above-mentioned steps three, adopted a kind of zero-frequency precompensation method based on acousto-optic frequency shifter (AOFS), zero-frequency noise in the amplifier is accurately controlled, and its performing step is:
The modulating frequency of A, acousto-optic phase-modulator is f
n, get its 1 order diffraction light as output light, then exporting light frequency is f-f
n, wherein f is the incident light frequency of non-modulated;
B, laser pulse has obtained an additive phase noise frequency f in amplification process
0(zero-frequency), the frequency of laser becomes f-f after then amplifying
n+ f
0,
C, with f
0Signal extracts by the self-reference light path, and feeds back to the acousto-optic phase-modulator, as its modulating frequency (that is, f
n=f
0), just can offset in advance the zero-frequency noise that amplification system is introduced, obtain at last the Laser output of carrier envelope stable phase.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110895339A (en) * | 2019-11-01 | 2020-03-20 | 清华大学 | Double-optical-comb multi-pulse distance measuring system and application thereof |
| CN111725696A (en) * | 2020-06-16 | 2020-09-29 | 中国人民解放军国防科技大学 | Piston phase regulation and control system and method of laser coherent array |
| CN112213938A (en) * | 2020-10-12 | 2021-01-12 | 成都天奥电子股份有限公司 | Optical frequency atomic clock |
| CN112928591A (en) * | 2013-03-15 | 2021-06-08 | 伊雷克托科学工业股份有限公司 | Phased array steering for laser beam positioning system |
| CN115513756A (en) * | 2022-08-29 | 2022-12-23 | 武汉华锐超快光纤激光技术有限公司 | Acousto-optic beam combination high-power high-energy femtosecond laser and laser beam combination method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040017833A1 (en) * | 2000-03-30 | 2004-01-29 | Cundiff Steven T. | Mode-locked pulsed laser system and method |
| US20110235661A1 (en) * | 2008-12-02 | 2011-09-29 | Christian Grebing | Method and device for generating a self-referenced optical frequency comb |
| CN102244362A (en) * | 2011-06-14 | 2011-11-16 | 西北大学 | Three-level multi-channel principal oscillation-power amplification coherent compound myriawatt-level optical fiber laser |
| US20120205352A1 (en) * | 2011-02-14 | 2012-08-16 | Imra America, Inc. | Compact, coherent, high brightness light sources for the mid and far ir |
-
2012
- 2012-09-18 CN CN2012103456708A patent/CN102882108A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040017833A1 (en) * | 2000-03-30 | 2004-01-29 | Cundiff Steven T. | Mode-locked pulsed laser system and method |
| US20110235661A1 (en) * | 2008-12-02 | 2011-09-29 | Christian Grebing | Method and device for generating a self-referenced optical frequency comb |
| US20120205352A1 (en) * | 2011-02-14 | 2012-08-16 | Imra America, Inc. | Compact, coherent, high brightness light sources for the mid and far ir |
| CN102244362A (en) * | 2011-06-14 | 2011-11-16 | 西北大学 | Three-level multi-channel principal oscillation-power amplification coherent compound myriawatt-level optical fiber laser |
Non-Patent Citations (2)
| Title |
|---|
| ANDREI A. FOTIADI ET AL.: "All-fiber coherent combining of Er-doped amplifiers through refractive index control in Yb-doped fibers", 《OPTICS LETTERS》, vol. 34, no. 22, 15 November 2009 (2009-11-15), XP001550146, DOI: doi:10.1364/OL.34.003574 * |
| ARNO KLENKE ET AL.: "Coherently-combined two channel femtosecond fiber CPA system producing 3 mJ pulse energy", 《OPTICS EXPRESS》, vol. 19, no. 24, 21 November 2011 (2011-11-21) * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112928591A (en) * | 2013-03-15 | 2021-06-08 | 伊雷克托科学工业股份有限公司 | Phased array steering for laser beam positioning system |
| CN110895339A (en) * | 2019-11-01 | 2020-03-20 | 清华大学 | Double-optical-comb multi-pulse distance measuring system and application thereof |
| CN110895339B (en) * | 2019-11-01 | 2022-02-25 | 清华大学 | Double-optical-comb multi-pulse distance measuring system and application thereof |
| CN111725696A (en) * | 2020-06-16 | 2020-09-29 | 中国人民解放军国防科技大学 | Piston phase regulation and control system and method of laser coherent array |
| CN111725696B (en) * | 2020-06-16 | 2021-05-25 | 中国人民解放军国防科技大学 | Piston phase regulation and control system and method of laser coherent array |
| CN112213938A (en) * | 2020-10-12 | 2021-01-12 | 成都天奥电子股份有限公司 | Optical frequency atomic clock |
| CN112213938B (en) * | 2020-10-12 | 2022-02-01 | 成都天奥电子股份有限公司 | Optical frequency atomic clock |
| CN115513756A (en) * | 2022-08-29 | 2022-12-23 | 武汉华锐超快光纤激光技术有限公司 | Acousto-optic beam combination high-power high-energy femtosecond laser and laser beam combination method thereof |
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Application publication date: 20130116 |