CN102957084A - Phase noise compensative amplification system - Google Patents
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- CN102957084A CN102957084A CN2012104668126A CN201210466812A CN102957084A CN 102957084 A CN102957084 A CN 102957084A CN 2012104668126 A CN2012104668126 A CN 2012104668126A CN 201210466812 A CN201210466812 A CN 201210466812A CN 102957084 A CN102957084 A CN 102957084A
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Abstract
The invention discloses a phase noise compensative amplification system, and the phase noise compensative amplification system comprises an oscillator (1) for outputting a seed light source, and the phase noise compensative amplification system is characterized in that the output end of the oscillator (1) is provided with an acoustic-optic frequency shifter (2) for outputting zero-order light (LO) and first-order light (L1) after processing the seed light source, wherein the output end of the first-order light (L1) of the acoustic-optic frequency shifter (2) is provided with a stretcher (3), the output end of the stretcher (3) is provided with a cascade amplifier (4), the output end of the cascade amplifier (4) is provided with a compressor (5), the output end of the compressor (5) is provided with a number one beam splitting sheet (BS1), the reflection light of the number one beam splitting sheet (BS1) is communicated with a compensative amplification system (12), and the compensative amplification system (12) is connected with the acoustic-optic frequency shifter (2) and supplies a control signal to the acoustic-optic frequency shifter (2).
Description
[technical field]
The invention belongs to ultrafast high field laser technology field, especially the noise reducing amplification system.
[background technology]
High-power fiber light comb has a wide range of applications in high-order harmonic generation, precise light spectrometry, micro/nano-scale material processing and other fields.Along with the development of doubly clad optical fiber manufacture craft and high-brightness semiconductor laser pumping technology, pulse laser output average power has reached near kilowatt, has promoted the development of high-power fiber optical frequency com.The method that realizes at present high-power fiber light comb carrier envelope stable phase mainly contains two kinds: phase servo PHASE-LOCKED LOOP PLL TECHNIQUE and difference frequency production method.The phase servo PHASE-LOCKED LOOP PLL TECHNIQUE is vulnerable to the feedback bandwidth restriction, often causes power unstable to pump modulation in the feedback procedure, destroys the mode-lock status of oscillation source, affects high power light comb system stable operation.The carrier envelope shifted signal of difference frequency production method can be subject to the impact of a large amount of 1/f noises and other low-frequency noise, has limited the precision of locking.
Yb dosed optical fiber light comb is vulnerable to the negative effect of high-order nonlinear effect and high-order dispersion paired pulses space-time characterisation in amplification process, in pulse strength enhancing process, high-order nonlinear effect and high-order dispersion effect can be destroyed the room and time distribution character of pulse, cause pulse shape that serious distortion and division occur.Moreover the spontaneous radiation effect has not only reduced the utilization ratio of amplification system to pump energy in the amplification process, also can introduce additive phase noise and parasitic spectral component by paired pulses simultaneously, and then have a strong impact on the amplification effect of amplifier.
In sum, although have at present system and the equipment that multiple realization high power pulse amplifies, all exist various shortcomings and deficiencies.
[summary of the invention]
In order to solve deficiency of the prior art, provide the amplification system of the phase noise that thermal effect, non-linear integral, pump light intensities shake, Raman scattering and spontaneous amplification radiological equivalent should be introduced in a kind of establishment high power amplification process.
The technical solution adopted in the present invention is:
A kind of phase noise compensation formula amplification system, include the oscillator of output seed light source, be provided with the acousto-optic frequency shifter of seed light source being processed rear output zero order light and one grade of light at described oscillator output end, output at one grade of light of described acousto-optic frequency shifter is provided with stretcher, be provided with cascade amplifier at described stretcher output, be provided with compressor reducer at described cascade amplifier output, be provided with beam splitting chip No. one at described compressor reducer output, the reverberation of a described beam splitting chip is communicated with the compensation amplification system, and described compensation amplification system is connected with the acousto-optic frequency shifter and provides control signal for the acousto-optic frequency shifter.
This system adopts feed-forward phase noise compensation technology, and described feed-forward phase noise compensation technology refers to utilize the phase noise of introducing in the phase noise compensation function inhibition high power amplification process of acousto-optic frequency shifter (AOFS).Specifically refer to, modulating driving frequency without the laser oscillator output light of locking through one is f
DAcousto-optic frequency shifter (AOFS), zero level and one grade of two-way output light will appear in the output of this frequency shifter.Wherein, zero order light does not obtain the shift frequency of frequency shifter (AOFS), still keeps original frequency characteristic; The situation of the one grade of output in another road light is then different, and according to acousto-optic crystal shift frequency principle, one order diffraction light of this frequency shifter will obtain frequency shift amount-f
DIf this moment the driving frequency of frequency shifter is set to the carrier wave zero-frequency of laser, i.e. f
D=f
0, then one grade of output light will obtain-f
0Frequency displacement, this frequency displacement just will be offset the f that incident light contains
0And follow f
0Phase noise, so one grade of output of acousto-optic frequency shifter (AOFS) is accurate light comb.
Described compensation amplification system includes the self-reference detection system that is communicated with beam splitting chip reverberation, be provided with the circuit filtering amplifier at described self-reference detection system output, described circuit filtering amplifier out is connected with the acousto-optic frequency shifter and provides control signal for the acousto-optic frequency shifter.
Described self-reference zero-frequency Detection Techniques refer to utilize the radio-frequency component (2mfr+f0) of laser pulse and the frequency multiplication 2(mfr+f0 of low-frequency component) carry out beat frequency, wherein m is the longitudinal mode number of laser, be positive integer, f0 is the carrier envelope phase zero-frequency, and fr is the repetition rate of pulse.The low-frequency component fB=2 (mfr+f0)-(2mfr+f0) of beat signal=f0, just laser carrier envelope phase zero-frequency.Wherein, adopt self-reference zero-frequency Detection Techniques that the detection of carrier envelope phase (CEP) zero frequency signal f0 is carried out in the pulse of amplifying after the compression, and with this signal feedback to acousto-optic frequency shifter acousto-optic frequency shifter (AOFS).
Described compensation amplification system includes the beat frequency system that is communicated with the zero order light of acousto-optic frequency shifter output with beam splitting chip reverberation connected sum, output is provided with filter amplifier in described beat frequency system, and described filter amplifier output is connected with the acousto-optic frequency shifter and provides control signal for the acousto-optic frequency shifter.
Also establish ramp system at described beam splitting chip transmitted light one end, described ramp system output is provided with rising tone optical frequency shift device, output at one grade of light of described rising tone optical frequency shift device is provided with the second stretcher, be provided with the second cascade amplifier at described the second stretcher output, be provided with the second compressor reducer at described the second cascade amplifier out, be provided with beam splitting chip No. three at the second described compressor reducer output, described No. three beam splitting chip reverberation and the second beat frequency system connectivity, described the second beat frequency system also is communicated with the zero order light of rising tone optical frequency shift device output, be provided with the second filter amplifier at described the second beat frequency system output, described the second filter amplifier output is connected with rising tone optical frequency shift device and for rising tone optical frequency shift device provides control signal, and described the second filter amplifier output also is connected with ramp system and provides control signal for ramp system.
This system is the combination of two kinds of embodiment, enter the system among the second embodiment after by ramp system take the output light of the first embodiment as seed light source, wherein, a beat signal part is used for driving the acousto-optic frequency shifter, and another part is used for the relative spacing on control slope.The slope spacing directly affects the insertion dispersion measure on slope, thereby can affect the group velocity of pulse, and reaches the function of control impuls carrier envelope phase.Because the response speed on slope is slower, but the control successful, the slowly change noise that therefore can be used for paired pulses carrier envelope phase (CEP) is controlled.Acousto-optic frequency shifter (AOFS) fast response time can be used for the fast changed signal of carrier envelope phase (CEP) is controlled.
The advantage of this embodiment is: 1, can reduce amplification process to the requirement of vibration light source, can realize just that by using common mode-locked laser the stable high power pulse of carrier envelope phase (CEP) amplifies.2, reduced system's degree of being responsible in the multistage amplification process, whole process only need to adopt a self-reference zero-frequency to survey the high power pulse that just can obtain by the mode of beat frequency the accurate control of carrier envelope phase (CEP) and export.3, the control precision of carrier envelope phase (CEP) zero-frequency is high, not only establishment the fast variable of zero-frequency, and the slowly change of zero-frequency drift realized accurate control.
Described stretcher is identical with the second stretcher structure all to be the chirp spread device, described cascade amplifier is identical with the second cascade amplifier architecture all to be the connection stage power amplifier of warbling, and it once includes a prime amplifier, an optical isolator, No. two prime amplifiers, No. two optical isolators, a main power amplifier, No. three optical isolators and No. two main power amplifiers along the light path trend from the input to the output.
The chirp spread method has solved the negative effect of high-order nonlinear effect paired pulses characteristic in the amplification process.The mode of utilizing the multilevel cascade to amplify, the spontaneous emission noise in the establishment amplification process improves the pump light coupling efficiency.Also utilize simultaneously the balanced compensated method of feed-forward, improved the time-frequency domain control precision, solved the difficult problem of ultrafast high field laser accurate control.
Described multi-stage cascade chirped pulse amplification refers to by the high-dispersive fibre lower powered seed pulse be carried out time domain broadening, when making pulse produce linear chrip on time-domain by the femtosecond broadening to hundreds of psecs.Broadening on the time scale has reduced the peak power of pulse, can effectively weaken the negative effect of nonlinear effect in the pulse amplification process.Simultaneously, adopt a plurality of double-clad photon crystal optical fibre amplifiers progressively seed light to be carried out power amplification, namely multi-stage cascade amplifies, and reaches the spontaneous emission noise in the establishment amplification process and takes full advantage of the purpose of pumping source energy.
Described compressor reducer is identical with the second compressor configuration all to be pulse shortener, it once by the 4th reflective mirror, a grating, No. two gratings, No. two speculums of transmissive incident light, is back to the output of the 4th mirror reflects through the former road of the 5th speculum again from the incident light to the output.
Described self-reference detection system includes the first microcobjective, lithium columbate crystal, the second microcobjective, filter, photodetector successively from incident light one side.
Described beat frequency system is identical with the second beat frequency system configuration, include the delay time delayed time system that is formed by the several piece reflective mirror of control of incident light, also include the 3rd speculum to the zero order light reflection, and No. two beam splitting chips that the incident light after zero order light and the time-delay is crossed, be provided with photodetector at No. two beam splitting chip outputs.
Be provided with the first speculum that the reverberation of the first beam splitting chip is imported the compensation amplification system in described the first beam splitting chip one side.
Export a side in acousto-optic frequency shifter zero order light and be provided with the second speculum that zero order light is imported the beat frequency system, export a side in rising tone optical frequency shift device zero order light and be provided with the 6th speculum that zero order light is imported the second beat frequency system.
The technical scheme that adopts the present invention to propose is compared with traditional high power light comb, and have the following advantages: 1) locking process does not need to intervene the oscillator operation, and the stability of a system is good; 2) the carrier envelope deviation frequency is determined by acousto-optic frequency shifter driving frequency after the locking, can realize that any deviation frequency light comb is synthetic; 3) without any need for phase lock circuitry, simplied system structure; 4) fast response time, compensating band is roomy, and the locking precision is high.
[description of drawings]
Fig. 1 is total system figure of the present invention.
Fig. 2 is the embodiment of the invention 1 system diagram.
Fig. 3 is the embodiment of the invention 2 system diagrams.
Fig. 4 is the embodiment of the invention 3 system diagrams.
Fig. 5 is the cascade amplifier system diagram.
Fig. 6 is for providing with reference to detection system figure.
Fig. 7 is the beat frequency system diagram.
Fig. 8 is compressor installation figure.
[embodiment]
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technical staff's of the same trade understanding:
Total system figure of the present invention produces the seed light that amplification needs by oscillator 1 as shown in Figure 1, and this seed light should have the pulse repetition frequency of locking, or stabilized carrier envelope phase zero-frequency.
Then, seed light is sent into acousto-optic frequency shifter (AOFS) 2, its driving frequency is provided by follow-up compensation amplification system 12; Simultaneously its one grade of (diffraction) light L1 is sent into pulse stretcher 3, paired pulses carries out the broadening of time domain and makes pulse with linear chrip.
Then, scheme adopts full optical fiber type chirped pulse cascade amplifying technique paired pulses to carry out the high power amplification.Use cascade amplifier 4, in multistage amplification process, adopt first monomode fiber as pre-gain amplifier medium, carry out small-power and amplify in advance, make the pulse of enough energy can be coupled into the double-clad photon crystal optical fibre amplifier, to suppress the spontaneous amplification radiated noise in the amplification process; Adopt simultaneously large mould area double-cladding Yb-doped photon crystal optical fiber as main amplification gain medium, the chirped pulse amplifier paired pulses by two-stage cascade carries out high power and amplifies.Amplify afterpulse and carry out dispersion compensation by pulse shortener 5, thereby realize High power ultra-short pulse output.
At last, adopt the additive phase noise in the phase noise precompensation technology paired pulses amplification process to control effectively.After the cascade amplification system, by the drift value f0+ Δ of self-reference carrier phase measurement systematic survey high-power output laser pulse carrier envelope phase place, wherein f0 is pulse carrier envelope phase (CEP) zero-frequency, and Δ is the additional noise in the amplification process.With the acousto-optic frequency shifter (AOFS) that is used for behind this signal circuit filter and amplification before the drive amplification system, make it produce in advance a branch of seed light with-(f0+ Δ) characteristic at one grade of light output end, compensate the phase drift that whole amplification system will produce.Thereby reach and effectively suppress gain competition and the purpose of amplifying pulse strength-phase shift noise in the high repetition frequency high power amplification process.
Execute example 1:
As shown in Figure 2, adopt nonlinear polarization rotation locked mode femto-second laser as seed source, the precompensation phase noise is realized high-power fiber light comb.
Its implementation detail:
(1) selects the nonlinear polarization rotation ytterbium-doping optical fiber laser to make the ultrashort pulse oscillation source, it is characterized in that the repetition rate fr of pulse is accurately locked.
(2) the output light of oscillator 1 is through an acousto-optic frequency shifter 2, and its driving frequency is fd, the frequency shift amount of its one grade of (diffraction) light L1 generation-fd, and as output light.
(3) carry out broadening with monomode fiber as the time domain width of 3 pairs of seed lasers of chirp pulse stretcher, the pulse distortion of avoiding damage that superelevation peak power in the ultrashort pulse amplification process causes optics and nonlinear effect to cause.
(4) adopt 4 pairs of seed light of cascade amplifier (multistage ytterbium doped optical fiber amplifier) to carry out power amplification.The structure of case cascade amplifier 4 as shown in Figure 5.
As shown in Figure 5:
(a) the first prime amplifier 41 and the second prime amplifier 42, gain media is selected single-mode ytterbium-doping optical fiber, and adopts the forward pumping working method.
(b) the first main amplifier 43 and the second main amplifier 44, gain media is selected large die face ytterbium-doped double-cladded-layer photonic crystal fiber, adopts simultaneously the backward pumping working method.
(c) place optical isolator ISO between every grade of amplifier, prevent backpropagation bad pre-amplifier of light loss and oscillator.
(5) realization of compressor reducer 5, its structure is as shown in Figure 8: adopt a pair of transmission-type grating in the scheme, its structure as shown in Figure 8, light pulse is returned along former direction after being reflected mirror (high reflective mirror) M5 reflection after through the two sides transmission-type grating, and reflects output by another 45 ° of speculums (high reflective mirror) M4.One of them grating is positioned on the adjustable moving platform, by changing the mode of grating pair spacing, the GVD (Group Velocity Dispersion) of coming accurate compensated amplifier to introduce.
(6) self-reference detection system: the detection of zero-frequency noise signal, adopt the self-reference zero-frequency interference device of conllinear that carrier envelope phase (CEP) zero-frequency that amplifies pulse is surveyed in the scheme.Its structure chart is as shown in Figure 6: amplify after pulse is coupled into the lithium columbate crystal (PPLN) of block period modulation by a microcobjective MO, produce the super continuous spectrums that covers a frequency multiplication layer, in the PPLN crystal, produce simultaneously the frequency doubled light 2(nfr+f0 of low-frequency component); Then pass through another microcobjective MO and bandpass filter, realize the radio-frequency component (2nfr+f0) and frequency doubled light 2(nfr+f0 of continuous spectrum at detector) beat frequency, beat frequency fB=2 (nfr+f0)-(2nfr+f0)=f0, wherein n is the longitudinal mode number of laser, be positive integer, f0 is the carrier envelope phase zero-frequency, and fr is the repetition rate of pulse, and fB is the zero frequency signal of pulse.
(7) circuit filtering amplifier 7 is identical with filter amplifier 10 and the second filter amplifier 10-1 structure, formed by a band acceptor and low noise high-gain amplifier, wherein the centre frequency of band pass filter is f0, bandwidth 10MHz, amplifier gain coefficient〉50dB.
(8) realization of zero-frequency noise compensation.With the zero frequency signal f0 that detects, through behind the filter and amplification, be directly used in and drive acousto-optic frequency shifter (AOFS).At this moment, fd=f0, one order diffraction light generation frequency displacement-f0 of acousto-optic frequency shifter (AOFS), this frequency shift amount will with follow-up amplification process in f0 offset, be zero the stable high-power laser pulse output of carrier envelope phase (CEP) thereby obtain zero-frequency.Perhaps utilize frequency mixer with a standard signal f and f0 mixing, produce the mixed frequency signal of f+f0, and with this signal driver acousto-optic frequency shifter (AOFS), can obtain the output light that zero frequency signal is f at this moment.Because f comes the frequency source of self-stabilization, so carrier envelope phase (CEP) zero-frequency of output pulse is stable equally.
Example 2:
Adopt the light comb as seed source, utilize phase noise precompensation technology to realize that the zero-frequency in the femtosecond light comb pulse amplification process is become drift slowly carries out precision control, concrete scheme as shown in the figure.
As shown in Figure 3:
(1) oscillator 1 is light comb light source, it is characterized in that:
(a) laser repetition rate fr is accurately locked, locking precision＜1mHz;
(b) the carrier envelope phase frequency f 0 of pulse is accurately locked, locking precision＜10mHz.
(2) light comb seed light is through acousto-optic frequency shifter (AOFS) 2, its one order diffraction light is sent into stretcher 3, then utilize chirped pulse cascade amplifier 4 that it is carried out high power and amplify, and by compressor reducer 5 high power is amplified pulse compression to the femtosecond magnitude, at last output.
(3) control of carrier envelope phase (CEP) zero-frequency noise in the amplification process.
(a) the zero order light L0 of acousto-optic frequency shifter (AOFS) amplifies output light with part (1%) and carry out beat frequency in beat frequency system 8, and its beat signal has namely comprised the phase noise Δ in the amplification process.This signal is passed through filter amplifier 10, be directly used in and drive acousto-optic frequency shifter (AOFS), consequently one grade of light of acousto-optic frequency shifter (AOFS) produces the frequency shift amount that contains (Δ), can with follow-up amplification process in Δ offset, realize that the low noise high power laser light amplifies.
Its structure is as shown in Figure 7:
(b) amplify light through a delayed time system (time-delay control line) 81, close bundle with zero level (diffraction) light of acousto-optic frequency shifter (AOFS) at No. two beam splitting chip BS2, and by a photodetector detection 82, at this moment, detector will be exported the repetition rate signal of two-beam and beat signal each other, and by circuit filtering device amplifier 7 beat signal is extracted, be used for feedback and drive acousto-optic frequency shifter (AOFS) 2.
(4) under the zero-frequency noise compensation effect of acousto-optic frequency shifter (AOFS) 2, the annex phase noise that stretcher 3, cascade amplifier 4 and compressor reducer 5 produce has all obtained establishment, the carrier envelope phase locking of system's output pulse this moment is on the light comb light source, because zero level (diffraction) light L0 is the direct output light of light source, be not subject to the impact of subsequent process, kept the time-frequency domain stability of light comb light source.Amplify light and its beat frequency, in fact exactly take it as normative reference, the zero-frequency of amplification process is locked on zero level (diffraction) the light L0.
Example 3:
The compensation amplification of cascade noise.This example is on the basis of example 1 and 2, and the seed light source take the output light of example 1 as example 2 utilizes the structure of example 2 that further high power is carried out in output pulse on the example 1 and amplifies.Concrete scheme as shown in the figure.
As shown in Figure 4:
(1) seed light source 11 adopts the structure of embodiment 1, and wherein oscillator is common mode-locked laser, it is characterized in that the repetition rate of pulse accurately locks, locking precision＜1mHz.
(2) seed light enters the low noise power amplifying system among the embodiment 2 through after a pair of ramp system 9.Wherein, the signal part after the second 8-1 of beat frequency system is amplified by the second filter amplifier 10-1 is used for driving rising tone optical frequency shift device 2-1, and another part is used for the relative spacing of control ramp system 9.The spacing of ramp system 9 directly affects the insertion dispersion measure of ramp system 9, thereby can affect the group velocity of pulse, and reaches the function of control impuls carrier envelope phase.Because the response speed on slope 9 is slower, but the control successful, the slowly change noise that therefore can be used for paired pulses carrier envelope phase (CEP) is controlled.Rising tone optical frequency shift device (AOFS) 2-1 fast response time can be used for the fast changed signal of carrier envelope phase (CEP) is controlled.
The advantage of this embodiment is: 1, can reduce amplification process to the requirement of vibration light source, can realize just that by using common mode-locked laser the stable high power pulse of carrier envelope phase (CEP) amplifies.2, reduced system's degree of being responsible in the multistage amplification process, whole process only need to adopt a self-reference zero-frequency to survey the high power pulse that just can obtain by the mode of beat frequency the accurate control of carrier envelope phase (CEP) and export.3, the control precision of carrier envelope phase (CEP) zero-frequency is high, not only establishment the fast variable of zero-frequency, and the slowly change of zero-frequency drift realized accurate control.
Claims (10)
1. phase noise compensation formula amplification system, include the oscillator (1) of output seed light source, it is characterized in that: be provided with the acousto-optic frequency shifter (2) of seed light source being processed rear output zero order light (L0) and one grade of light (L1) at described oscillator (1) output, output at described (2) one grades of light of acousto-optic frequency shifter (L1) is provided with stretcher (3), be provided with cascade amplifier (4) at described stretcher (3) output, be provided with compressor reducer (5) at described cascade amplifier (4) output, be provided with a beam splitting chip (BS1) at described compressor reducer (5) output, the reverberation of a described beam splitting chip (BS1) is communicated with compensation amplification system (12), and described compensation amplification system (12) is connected with acousto-optic frequency shifter (2) and provides control signal for acousto-optic frequency shifter (2).
2. a kind of phase noise compensation formula amplification system according to claim 1, it is characterized in that: described compensation amplification system includes the self-reference detection system (6) that is communicated with a beam splitting chip (BS1) reverberation, be provided with circuit filtering amplifier (7) at described self-reference detection system (6) output, described circuit filtering amplifier (7) output is connected with acousto-optic frequency shifter (2) and provides control signal for acousto-optic frequency shifter (2).
3. a kind of phase noise compensation formula amplification system according to claim 1, it is characterized in that: described compensation amplification system includes the beat frequency system (8) that is communicated with the zero order light (L0) of acousto-optic frequency shifter (2) output with a beam splitting chip (BS1) reverberation connected sum, output is provided with filter amplifier (10) in described beat frequency system (8), and described filter amplifier (10) output is connected with acousto-optic frequency shifter (2) and provides control signal for acousto-optic frequency shifter (2).
4. a kind of phase noise compensation formula amplification system according to claim 2, it is characterized in that: also establish ramp system (9) at a described beam splitting chip (BS1) transmitted light one end, described ramp system (9) output is provided with rising tone optical frequency shift device (2-1), output at one grade of light of described rising tone optical frequency shift device (2-1) (L1) is provided with the second stretcher (3-1), be provided with the second cascade amplifier (4-1) at described the second stretcher (3-1) output, be provided with the second compressor reducer (5-1) at described the second cascade amplifier (4-1) output, be provided with No. three beam splitting chips (BS1-1) at described the second compressor reducer (5-1) output, described No. three beam splitting chips (BS1-1) reverberation is communicated with the second beat frequency system (8-1), described the second beat frequency system (8-1) also is communicated with the zero order light (L0) of rising tone optical frequency shift device (2-1) output, be provided with the second filter amplifier (10-1) at described the second beat frequency system (8-1) output, described the second filter amplifier (10-1) output is connected with rising tone optical frequency shift device (2-1) and provides control signal for rising tone optical frequency shift device (2-1), and described the second filter amplifier (10-1) output also is connected with ramp system (9) and provides control signal for ramp system (9).
5. the described a kind of phase noise compensation formula amplification system of any one in 4 according to claim 1, it is characterized in that: described stretcher (3) is identical with the second stretcher (3-1) structure all to be the chirp spread device, described cascade amplifier (4) is identical with the second cascade amplifier (4) structure all to be the connection stage power amplifier of warbling, and it once includes a prime amplifier (41) along the light path trend from the input to the output, an optical isolator (45), No. two prime amplifiers (42), No. two optical isolators (46), a main power amplifier (43), No. three optical isolators (47) and No. two main power amplifiers (44).
6. a kind of phase noise compensation formula amplification system according to claim 5, it is characterized in that: described compressor reducer (5) is identical with the second compressor reducer (5-1) structure all to be pulse shortener, it once by the 4th reflective mirror (M4), a grating (S1), No. two gratings (S2), No. two speculums (M5) of transmissive incident light, is back to the 4th speculum (M4) reflection output through the former road of the 5th speculum (M5) again from the incident light to the output.
7. a kind of phase noise compensation formula amplification system according to claim 4, it is characterized in that: described self-reference detection system (6) includes the first microcobjective (61), lithium columbate crystal (62), the second microcobjective (63), filter (64), photodetector (65) successively from incident light one side.
8. according to claim 3 or 4 described a kind of phase noise compensation formula amplification systems, it is characterized in that: described beat frequency system (8) is identical with the second beat frequency system (8-1) structure, include the delay time delayed time system (81) that is formed by the several piece reflective mirror of control of incident light, also include the 3rd speculum (M3) to zero order light (L0) reflection, and No. two beam splitting chips (BS2) that the incident light after zero order light (L0) and the time-delay is crossed, be provided with photodetector (82) at No. two beam splitting chips (BS2) output.
9. a kind of phase noise compensation formula amplification system according to claim 1 is characterized in that: be provided with the first speculum (M1) that the reverberation of the first beam splitting chip (BS1) is imported the compensation amplification system in described the first beam splitting chip (BS1) side.
10. according to claim 3 or 4 described a kind of phase noise compensation formula amplification systems, it is characterized in that: be provided with the second speculum (M2) that zero order light (L0) is imported beat frequency system (8) in acousto-optic frequency shifter (2) zero order light (L0) output one side, be provided with the 6th speculum (M6) that zero order light (L0) is imported the second beat frequency system (8-1) in rising tone optical frequency shift device (2-1) zero order light (L0) output one side.
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| CN104682187A (en) * | 2015-03-09 | 2015-06-03 | 北京航空航天大学 | Automatic compensation device of phase noise of Raman laser system based on closed loop feedback and method thereof |
| CN106017674A (en) * | 2016-05-11 | 2016-10-12 | 上海朗研光电科技有限公司 | Noise-immunity adaptive-compensation terahertz optical comb spectrum detection method |
| CN106950778A (en) * | 2017-05-27 | 2017-07-14 | 中国电子科技集团公司第四十研究所 | A kind of production method of the high-precision optical wavelength standard based on femtosecond light comb |
| CN107104739A (en) * | 2017-04-26 | 2017-08-29 | 长春理工大学 | A kind of ultra-broadband digital laser phase-locked loop device and phase-lock technique |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682187A (en) * | 2015-03-09 | 2015-06-03 | 北京航空航天大学 | Automatic compensation device of phase noise of Raman laser system based on closed loop feedback and method thereof |
| CN104682187B (en) * | 2015-03-09 | 2018-03-23 | 北京航空航天大学 | A kind of raman laser system phase noise autocompensation installation and method based on closed loop feedback |
| CN106017674A (en) * | 2016-05-11 | 2016-10-12 | 上海朗研光电科技有限公司 | Noise-immunity adaptive-compensation terahertz optical comb spectrum detection method |
| CN107104739A (en) * | 2017-04-26 | 2017-08-29 | 长春理工大学 | A kind of ultra-broadband digital laser phase-locked loop device and phase-lock technique |
| CN106950778A (en) * | 2017-05-27 | 2017-07-14 | 中国电子科技集团公司第四十研究所 | A kind of production method of the high-precision optical wavelength standard based on femtosecond light comb |
| CN106950778B (en) * | 2017-05-27 | 2019-06-18 | 中国电子科技集团公司第四十一研究所 | A kind of production method of the high-precision optical wavelength standard based on femtosecond light comb |
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