CN103001118A - Gain narrowing controlled all-fiber laser amplifier for high-power picosecond pulses - Google Patents
Gain narrowing controlled all-fiber laser amplifier for high-power picosecond pulses Download PDFInfo
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Abstract
The invention discloses a gain narrowing controlled all-fiber laser amplifier for high-power picosecond pulses. The laser amplifier comprises an all-fiber picosecond seed resource. An optical fiber amplifier is connected to an output end of the all-fiber picosecond seed resource, and an output module is connected to an output end of the optical fiber amplifier; the all-fiber picosecond seed resource is a mode-locked laser in an all-fiber ring cavity structure and comprises a pump laser, a wavelength division multiplexer, a gain optical fiber, an output coupler, a first polarization controller, a polarization beam splitter, a second polarization controller and a polarization independent isolator; and a polarization-maintaining output end of the polarization beam splitter serves as an output end of the all-fiber picosecond seed resource, a non polarization-maintaining output end of the polarization beam splitter is connected with an input end of the polarization independent isolator, the second polarization controller is fixed on an optical fiber between the polarization beam splitter and the polarization independent isolator, and an output end of the polarization independent isolator is connected with the other input end of the wavelength division multiplexer, accordingly, an all-fiber ring structure is formed. By means of the gain narrowing controlled all-fiber laser amplifier for high-power picosecond pulses, long-term stable high-power picosecond pulse laser is obtained easily, and the manufacture cost of a high-power optical fiber laser system can be reduced.
Description
Technical field
The present invention relates to a kind of full optical fiber high power picosecond pulse laser amplifier of gain narrowing control.
Background technology
High-power picopulse has that pulse duration is narrow, peak power is high, monochromaticjty is good, with the material effects time greater than advantages such as thermal effect diffusion times, being widely used in micro-nano processing, medical treatment, precise distance measurement, high-speed communication and national defence field, is one of forward position research direction of field of lasers.Especially in application scenarios such as nonlinear optics frequency inverted, high-power laser pulse can obtain higher conversion efficiency.At present the method for generation picopulse commonly used mainly contains three kinds: directly modulation fast response semiconductor laser, adopt the material with saturated absorption character to realize picopulse output as optical switch and by the nonlinear polarization rotation mode-locking effect.
By producing on the electricity electric pulse less than 1 nanosecond, the semiconductor laser that drives fast response produces picopulse, its pulse duration is generally in hundreds of psecs, power output is hundreds of microwatts only, be subject to the response speed of semiconductor laser, adopt the method can't produce the pulse that pulsewidth is narrower, average power is higher.The method that adopts saturable absorbing mirror to produce ultrashort pulse is used comparatively extensive, select suitable saturable absorption material, can produce the ultrashort pulse of pulse duration from several psecs to hundreds of psecs, but adopt this method, laser long duration of action and saturable absorber, device lifetime is shorter, the power that also needs simultaneously accurate control chamber inside-pumping light, otherwise be easy to surpass the anti-damage threshold of saturable absorption material, burn device, especially in the high power laser of passive mode locking, the damage of absorber is the bottleneck problem of the output of restriction high power laser and high life mode-locked laser.
For obtaining high-power picopulse, method commonly used is to add narrow band filter spare in the chamber or outside the chamber at present, such as fiber grating, and narrow band filter etc.But all be to intercept the sub-fraction energy out from very wide spectrum on these device principles, the average power of seed laser is low after the filtering, and the locked mode of corresponding optical-fiber laser is difficult to stable control; And, needing more amplifier during follow-up the amplification, this method has increased the complexity of system on the one hand, has also significantly improved product cost.
Summary of the invention
For solving above-mentioned problems of the prior art, the present invention proposes a kind of full optical fiber high power picosecond pulse laser amplifier of gain narrowing control, this amplifier adopts all optical fibre structure, be easy to obtain high power picosecond pulse laser steady in a long-term, also can reduce the cost of manufacture of high power optical fibre laser system.
For achieving the above object, the present invention adopts following technical scheme:
A kind of full optical fiber high power picosecond pulse laser amplifier of gain narrowing control comprises full optical fiber psec seed source, is connected with fiber optic power amplifier at full optical fiber psec seed source output, and the fiber optic power amplifier output is connected with output module; Described full optical fiber psec seed source is the mode-locked laser of all optical fiber ring cavity structure, and full optical fiber psec seed source comprises pump laser, wavelength division multiplexer, gain fibre, output coupler, the first Polarization Controller, polarization beam apparatus, the second Polarization Controller, polarization irrelevant isolator; The continuous pump light of pump laser output enters all optical fiber ring cavity through wavelength division multiplexer, the wavelength division multiplexer output links to each other with an end of gain fibre, the other end of gain fibre links to each other with an end of output coupler, the end that described output coupler coupling ratio is higher links to each other with an end of polarization beam apparatus, and the lower end of coupling ratio is as the inclined to one side output of non-guarantor; The first Polarization Controller is fixed on the optical fiber between output coupler and the polarization beam apparatus, the inclined to one side output of the guarantor of described polarization beam apparatus is as the output of full optical fiber psec seed source, the non-guarantor of polarization beam apparatus partially end links to each other with the input of polarization irrelevant isolator, the second Polarization Controller is fixed on the optical fiber between polarization beam apparatus and the polarization irrelevant isolator, the output of described polarization irrelevant isolator links to each other with another input of wavelength division multiplexer, consists of full fiber annular structure.
Described the first Polarization Controller, the second Polarization Controller are manual Polarization Controller.
Described full optical fiber psec seed source also comprises full fibre-optical probe, described the first Polarization Controller is electronic Polarization Controller, the output of described output coupler is input to full fibre-optical probe, also be connected with the full fibre-optical probe feedack of basis at full fibre-optical probe and locked mode carried out on the control circuit of Real Time Monitoring, the output of control circuit is connected with electronic Polarization Controller; Described the second Polarization Controller is manual Polarization Controller
A kind of scheme of described fiber optic power amplifier is to comprise isolator, amplifier pumping source, bundling device or wavelength division multiplexer, amplifier gain optical fiber; The seed pulse of full optical fiber psec seed source output is input on the isolator, output pump light in amplifier pumping source is coupled to amplifier gain optical fiber with the seed laser that sees through isolator through wavelength division multiplexer or bundling device, described output module adopts output coupler, the picopulse that the output of amplifier gain optical fiber is amplified is through output coupler, the high light end of described output coupler is as final output, and low light level end is as the monitoring side.
Described fiber optic power amplifier comprises that the another kind of scheme of isolator is to comprise isolator, amplifier pumping source, bundling device or wavelength division multiplexer, amplifier gain optical fiber; The seed pulse of full optical fiber psec seed source output is input on the isolator, be input to amplifier gain optical fiber through the pulse behind the isolator, the pump light of amplifier pumping source output is coupled in the amplifier gain optical fiber through wavelength division multiplexer or bundling device, described output module adopts output coupler, the picopulse of the amplification of wavelength division multiplexer or bundling device output is through output coupler, the high light end of described output coupler is as final output, and low light level end is as the monitoring side.
Described fiber optic power amplifier also comprises filter, and filter is connected on the output of full optical fiber psec seed source.
Described output module adopts output coupler, and the picopulse that the output of fiber optic power amplifier output is amplified is through output coupler, and the splitting ratio of described output coupler is 1:99, and the high light end is as final output, and low light level end is as the monitoring side.
Described amplifier pumping source is single mode or multimode, the continuous conductor laser of power output between 0.5-10W.Amplifier gain optical fiber is for mixing ytterbium phosphate single mode or doubly clad optical fiber.
Adopt above technical scheme, the present invention compares with the high power picosecond laser that has at present narrow spectrum width output characteristic, has the following advantages:
1) effectively utilize amplification process gain narrowing effect, do not need to add the narrow bandwidth filter part, simple in structure;
2) inject the wide spectrum picopulse at the preliminary gain narrowing that produces of cascade amplification process, be easy to effectively suppress the adverse effect of stimulated Brillouin scattering in the fiber amplifier process, excited Raman amplification, improve the pulse contrast of amplifying pulse;
3) automatically realize spectral filtering in the picopulse amplification process, lifting with the pulse amplified energy, pulse frequency spectrum does not progressively narrow, and can reduce easily the time waveform distortion of pulse in the amplification process, possible time domain division and the impact of modulational instability in the suppressor pulse amplification process;
4) can farthest utilize the seed laser energy, avoid narrow-band filtering after power output significantly reduce, need the problem of amplifying again;
5) inject seed optical fiber picosecond pulses by frequency spectrum and be chosen near the gain centre wavelength of amplifier optical fiber, be conducive to improve the light-light conversion efficiency of amplifier;
6) the pulse frequency spectrum gain narrowing is amplified in cascade, is easy to control that pulse frequency spectrum does not produce division in the amplification process, also is easy to optimal control and obtains narrow frequency spectrum picopulse near the Fourier diffraction limit;
7) gain fibre of employing high-dopant concentration, fiber lengths is short, and the modal dispersion of introducing is few, amplifies pulse and does not produce the time domain waveform distortion;
8) gain fibre of employing phosphate material has smooth absorption coefficient in wider spectral region, and power output is more stable, and is low to the wavelength requirement of pumping semiconductor laser, saves cost;
9) whole device adopts all optical fibre structure, and simple compact, stable performance is easy to be integrated on the large-scale instrument of different application occasion.
Description of drawings
Accompanying drawing 1 is principle of the invention structure chart;
Accompanying drawing 2 is one of structural representation of full optical fiber psec seed source of the present invention;
Accompanying drawing 3 be full optical fiber psec seed source of the present invention structural representation two;
Accompanying drawing 4 forward pumping of the present invention arrowband picopulses produce schematic diagram;
Accompanying drawing 5 backward pumping of the present invention arrowband picopulses produce schematic diagram;
Accompanying drawing 6 high power of the present invention arrowband picopulses produce schematic diagram.
Embodiment
The present invention is described in further detail by embodiment below in conjunction with accompanying drawing, so that understand better the present invention:
Such as Fig. 1, the present invention introduces a kind of full optical fiber high power picosecond pulse laser amplifier of gain narrowing control, comprise full optical fiber psec seed source 1, be connected with the fiber optic power amplifier of 1 fiber optic power amplifier 2 or a plurality of cascades at full optical fiber psec seed source 1 output, fiber optic power amplifier 2 outputs are connected with output module 3.
Described full optical fiber psec seed source 1 is the mode-locked laser of all optical fiber ring cavity structure, pump laser is arranged, wavelength division multiplexer, gain fibre, output coupler, Polarization Controller, polarization irrelevant isolator, polarization beam apparatus in the chamber.Regulate Polarization Controller, change the polarization state of pulse in the chamber, under the effect of nonlinear polarization rotation effect, realize the output of locked mode picopulse.Pulse duration is 10-20ps, and repetition rate is 5-80MHz, and average power is 10-50mW.
Regulate the Polarization Controller in full optical fiber psec seed source 1 chamber, the centre wavelength that makes the picopulse output spectrum is corresponding with the spectral line of emission peak value of one or more levels follow-up fiber optic power amplifier 2 selected gain fibres, in amplification process, the gain narrowing effect can not effectively be amplified the spectrum component at the place, two edges of pulse, and the centre frequency composition is exaggerated, and the effect of gain narrowing effect is equivalent to introduce in the laser amplifier process narrow band filter that bandwidth constantly narrows down; Pulse is through casacade multi-amplifier, spectrum is constantly narrowed, the final arrowband high power picopulse that obtains near the Fourier diffraction limit, in the amplification process, the time meta-spectrum waveform of pulse can not produce the division cascade, the quantity of amplifier is more, and the spectrum narrowing effect is more obvious, and the spectrum of output picopulse is narrower.In the practical application, can be according to the quantity that requires the flexible choice amplifier of power output and spectral line width.
Through the high power pulse process output module 3 that fiber optic power amplifier 2 obtains, filtering pumping laser composition adjusts to spot size simultaneously, and use convenient various application scenarios.Output module can also add magneto-optical crystal, prevents the return bad device of light loss in the environment.
As shown in Figure 2, for the full optical fiber psec of passive-type seed source, comprise pump laser 11, wavelength division multiplexer 12, gain fibre 13, output coupler 14, the first Polarization Controllers 15, polarization beam apparatus 16, the second Polarization Controllers 17, polarization irrelevant isolator 18.Described pump laser 11 is semiconductor single mode pump laser, and semiconductor single mode pump laser peak power output is 480mW, and centre wavelength is 976nm, and the output tail optical fiber of semiconductor single mode pump laser is 105/125 energy-transmission optic fibre.Wavelength division multiplexer 12 adopts the 980/1030nm wavelength division multiplexer.The continuous pump light of the 980nm of pump laser 11 outputs enters all optical fiber ring cavity through wavelength division multiplexer 12, the output of wavelength division multiplexer 12 links to each other with an end of gain fibre 13, described gain fibre 13 adopts the YbDF350 single-mode ytterbium-doping optical fiber of OFS company, and this optical fiber has the absorption coefficient of 350dB/m at 976nm.The other end of gain fibre 13 links to each other with an end of output coupler 14, described output coupler 14 draws tapered low-power fiber coupler for what HI1060 optical fiber was made, the maximum continuous light power that can bear is 300mW, output coupling ratio with 2:8 or 3:7 or 4:6, the end that coupling ratio is higher links to each other with an end of the polarization beam apparatus 16 of 1030nm, and the lower end of coupling ratio is as the inclined to one side output 9 of non-guarantor.The first Polarization Controller 15 adopts manual Polarization Controller, it is fixed on the optical fiber between output coupler 14 and the polarization beam apparatus 16, the inclined to one side output 10 of the guarantor of described polarization beam apparatus 16 is PM980 optical fiber, and this protects the monitoring side that inclined to one side output 10 also can be used as full optical fiber psec oscillator.The non-guarantor of polarization beam apparatus 16 partially end links to each other with the input of the polarization irrelevant isolator 18 of 1030nm, the manual Polarization Controller of the second Polarization Controller 17 employings, and it is fixed on the optical fiber between polarization beam apparatus 16 and the polarization irrelevant isolator 18.Described polarization irrelevant isolator 18 has the anti-damage threshold that maximum is born the 300mW continuous light.The output of polarization irrelevant isolator 18 links to each other with the 1030nm input of wavelength division multiplexer, consists of full fiber annular structure.The good annular chamber of welding is opened pump laser 11, regulates two Polarization Controllers, and the inclined to one side output 9 of the non-guarantor of output coupler 14 can obtain average power 20-50mW, pulse duration 10-20ps, repetition rate 5-50MHz, the seed pulse of spectrum halfwidth 5-6nm.The inclined to one side output 10 of the guarantor of polarization beam apparatus 16 can obtain average power 10-20mW, pulse duration 10-20ps, repetition rate 5-50MHz, the seed pulse of spectrum halfwidth 5-6nm.
As shown in Figure 3, for the full optical fiber psec of ACTIVE CONTROL type seed source, comprise pump laser 11, wavelength division multiplexer 12, gain fibre 13, output coupler 14, the first Polarization Controllers 15, polarization beam apparatus 16, the second Polarization Controller 17, polarization irrelevant isolator 18, full fibre-optical probe 101, control circuit 102.Compare with the full optical fiber psec of the passive-type seed source of Fig. 2, difference is that the first Polarization Controller 15 adopts automatically controlled Polarization Controller.The good annular chamber of welding, open pump laser 11, regulate two Polarization Controllers, realize after the locked mode, be input to full fibre-optical probe 101 after the signal attenuation with the inclined to one side output 9 of non-guarantor, full fibre-optical probe 101 is received on the control circuit 102, and control circuit 102 carries out Real Time Monitoring according to full fibre-optical probe 101 feedacks to locked mode, if pattern losing lock or shakiness, control automatically controlled Polarization Controller, regulate polarization state, again locked mode in the chamber.
The inclined to one side output 9 of the non-guarantor of output coupler 14 can obtain average power 20-50mW, pulse duration 10-20ps, repetition rate 5-50MHz, the seed pulse of spectrum halfwidth 5-6nm.The inclined to one side output 10 of the guarantor of polarization beam apparatus 16 can obtain average power 10-20mW, pulse duration 10-20ps, repetition rate 5-50MHz, the seed pulse of spectrum halfwidth 5-6nm.
As shown in Figure 4, produce structure for forward pumping arrowband picopulse.
The structure of described full optical fiber psec seed source is the full optical fiber psec of passive-type seed source.
The number of described fiber optic power amplifier 2 is one, and fiber optic power amplifier 2 comprises isolator 21, amplifier pumping source 22, bundling device 23 or wavelength division multiplexer, amplifier gain optical fiber 24.The seed pulse of full optical fiber psec seed source 1 output is input on the isolator 21, and isolator 21 effects are to prevent the return light loss cur of follow up amplifier component, and the transmitance of isolator is more than 80%.The pump light of the centre wavelength 915-976nm of amplifier pumping source 22 outputs is coupled in the amplifier gain optical fiber 24 through wavelength division multiplexer or the bundling device 23 of 980/1030nm with the seed laser that sees through isolator 21.Described amplifier pumping source 22 is single mode or multimode, the continuous conductor laser of power output between 0.5-10W.Amplifier gain optical fiber 24 adopts the mode of Pumped for mixing ytterbium phosphate single mode or doubly clad optical fiber, and noise figure is less, and the pulse signal to noise ratio is higher.The picopulse that 24 outputs of amplifier gain optical fiber are amplified, its spectral width is narrower than the seed light of input, according to using needs, regulate the energy of pump laser and the length of gain fibre, can regulate the degree of gain narrowing, obtain live width at 0.5-1.0nm, the picopulse of average power 0.2-5W.
For paired pulses spectrum tentatively narrows, fiber optic power amplifier 2 also comprises filter 20, and filter 20 is connected on the inclined to one side output 9 of non-guarantor, and the centre wavelength of described filter is 1036nm, and bandwidth is 2-4nm.The seed pulse of full optical fiber psec seed source 1 is through behind the filter 20, depart from centre wavelength composition far away in the spectral component by filtering, because full optical fiber psec seed source 1 has identical centre wavelength with filter, most energy of seed light can both see through filter, after seeing through filter, pulse spectrum halfwidth 2-4nm.
Described output module 3 adopts output coupler 31, the picopulse that 24 outputs of amplifier gain optical fiber are amplified is through output coupler 31, the splitting ratio of described output coupler is 1:99, the high light end is as final output, low light level end is as the monitoring side, the Real-Time Monitoring output pulse width, repetition rate, the performance parameters such as spectral line width.
As shown in Figure 5, produce structure for backward pumping arrowband picopulse.
The structure of described full optical fiber psec seed source is the full optical fiber psec of passive-type seed source.
The quantity of described fiber optic power amplifier 2 is one, and fiber optic power amplifier 2 comprises isolator 21, amplifier pumping source 22, bundling device 23 or wavelength division multiplexer, amplifier gain optical fiber 24.The seed pulse of full optical fiber psec seed source 1 output is input on the isolator 21, and isolator 21 effects are to prevent the return light loss cur of follow up amplifier component, and the transmitance of isolator is more than 80%.Be input to amplifier gain optical fiber 24 through the pulse behind the isolator 21, described amplifier gain optical fiber 24 is for mixing ytterbium phosphate single mode or doubly clad optical fiber.The pump light of the centre wavelength 915-976nm of amplifier pumping source 22 outputs is coupled in the amplifier gain optical fiber 24 through wavelength division multiplexer or the bundling device 23 of 980/1030nm; described amplifier pumping source 22 is single mode or multimode, the continuous conductor laser of power output between 0.5-10W; adopt the mode of backward pump; can farthest utilize pump energy, obtain higher power output.Picopulse through amplifier gain optical fiber 24 is exported through bundling device 23, its spectral width is narrower than the seed light of input, according to using needs, regulate the energy of pump laser and the length of gain fibre, can regulate the degree of gain narrowing, obtain live width at 0.5-1nm, the picopulse of average power 0.2-5W.
For paired pulses spectrum tentatively narrows, fiber optic power amplifier 2 also comprises filter 20, and filter 20 is connected on the inclined to one side output 9 of non-guarantor of full optical fiber psec seed source 1, and the centre wavelength of described filter is 1036nm, and bandwidth is 2-4nm.The seed pulse of full optical fiber psec seed source 1 is through behind the filter 20, depart from centre wavelength composition far away in the spectral component by filtering, because full optical fiber psec seed source 1 has identical centre wavelength with filter, most energy of seed light can both see through filter, after seeing through filter, pulse spectrum halfwidth 2-4nm.
Described output module 3 adopts output coupler 31, the picopulse that bundling device 23 outputs are amplified is through output coupler 31, the splitting ratio of described output coupler is 1:99, the high light end is as final output, low light level end is as the monitoring side, the Real-Time Monitoring output pulse width, repetition rate, the performance parameters such as spectral line width.
Such as Fig. 6, for adopting passive-type all optical fiber ring cavity psec seed source, amplify the schematic diagram of realizing high power arrowband picopulse by two-stage.
The structure of described full optical fiber psec seed source is the full optical fiber psec of passive-type seed source.
Described fiber optic power amplifier 2 is two, is connected between full optical fiber psec seed source and the output module after 2 grades of two fiber optic power amplifiers are linked togather.
Described fiber optic power amplifier 2 comprises isolator 21, amplifier pumping source 22, bundling device 23 or wavelength division multiplexer, amplifier gain optical fiber 24.Isolator 21 effects are to prevent the return light loss cur of follow up amplifier component, and the transmitance of isolator is more than 80%.The pump light of the centre wavelength 915-976nm of amplifier pumping source 22 outputs is coupled in the amplifier gain optical fiber 24 through wavelength division multiplexer or the bundling device 23 of 980/1030nm with the seed laser that sees through isolator 12.Described amplifier pumping source 22 is single mode or multimode, the continuous conductor laser of power output between 0.5-10W.Amplifier gain optical fiber 24 adopts the mode of Pumped for mixing ytterbium phosphate single mode or doubly clad optical fiber, and noise figure is less, and the pulse signal to noise ratio is higher.The picopulse that 24 outputs of amplifier gain optical fiber are amplified, its spectral width is narrower than the seed light of input, according to using needs, regulate the energy of pump laser and the length of gain fibre, can regulate the degree of gain narrowing, so that the fine power amplifier output linewidth of the first order is at 0.5-1.0nm, the picopulse of average power 0.2-5W.
For avoiding crosstalking between the dual-stage amplifier, prevent return bad device of light loss, between amplifier, add high-power isolator 21, it has the anti-damage ability of maximum isolation 2W continuous light.The full fiber amplifier in the described second level has the anti-damage ability of the continuous return light of maximum isolation 2W.Wavelength 915-976nm centered by the pump laser of second level amplifier, the semiconductor laser of peak power output 25W.Picopulse after the amplification is through output coupler 31 outputs.
For adapting to the requirement of spot size under the different application occasion, obtain more excellent beam quality, high-power picopulse is input to the spacing shaping module 4 that set of lenses consists of, the realization picopulse is exported from the Optical Fiber Transmission to the space, can also in the spacing shaping module, add faraday's crystal, prevent the pump laser of the return bad amplifier of light loss in the environment.
Claims (9)
1. the full optical fiber high power picosecond pulse laser amplifier of gain narrowing control, it is characterized in that comprising full optical fiber psec seed source (1), be connected with fiber optic power amplifier (2) at full optical fiber psec seed source (1) output, fiber optic power amplifier (2) output is connected with output module (3); Described full optical fiber psec seed source (1) is the mode-locked laser of all optical fiber ring cavity structure, full optical fiber psec seed source (1) comprises pump laser (11), wavelength division multiplexer (12), gain fibre (13), output coupler (14), the first Polarization Controller (15), polarization beam apparatus (16), the second Polarization Controller (17), polarization irrelevant isolator (18); The continuous pump light of pump laser (11) output enters all optical fiber ring cavity through wavelength division multiplexer (12), wavelength division multiplexer (12) output links to each other with an end of gain fibre (13), the other end of gain fibre (13) links to each other with an end of output coupler (14), the end that described output coupler (14) coupling ratio is higher links to each other with an end of polarization beam apparatus (16), and the lower end of coupling ratio is as the inclined to one side output of non-guarantor (9); The first Polarization Controller (15) is fixed on the optical fiber between output coupler (14) and the polarization beam apparatus (16), the inclined to one side output of guarantor (10) of described polarization beam apparatus (16) is as the output of full optical fiber psec seed source (1), the non-guarantor of polarization beam apparatus (16) partially end links to each other with the input of polarization irrelevant isolator (18), the second Polarization Controller (17) is fixed on the optical fiber between polarization beam apparatus (16) and the polarization irrelevant isolator (18), the output of described polarization irrelevant isolator (18) links to each other with another input of wavelength division multiplexer, consists of full fiber annular structure.
2. the full optical fiber high power picosecond pulse laser amplifier of a kind of gain narrowing control according to claim 1 is characterized in that described the first Polarization Controller (15), the second Polarization Controller (17) are manual Polarization Controller.
3. the full optical fiber high power picosecond pulse laser amplifier of a kind of gain narrowing control according to claim 1, it is characterized in that described full optical fiber psec seed source (1) also comprises full fibre-optical probe (101), described the first Polarization Controller (15) is electronic Polarization Controller, the output (9) of described output coupler (14) is input to full fibre-optical probe (101), also be connected with full fibre-optical probe (101) feedack of basis at full fibre-optical probe (101) and locked mode carried out on the control circuit (102) of Real Time Monitoring, the output of control circuit (102) is connected with electronic Polarization Controller; Described the second Polarization Controller (17) is manual Polarization Controller.
4. according to claim 2 or the full optical fiber high power picosecond pulse laser amplifier of 3 described a kind of gain narrowings controls, it is characterized in that described fiber optic power amplifier (2) comprises isolator (21), amplifier pumping source (22), bundling device (23) or wavelength division multiplexer, amplifier gain optical fiber (24); The seed pulse of full optical fiber psec seed source (1) output is input on the isolator (21), output pump light in amplifier pumping source (22) is coupled to amplifier gain optical fiber (24) with the seed laser that sees through isolator (21) through wavelength division multiplexer or bundling device (23), described output module (3) adopts output coupler (31), the picopulse that amplifier gain optical fiber (24) output is amplified is through output coupler (31), the high light end of described output coupler is as final output, and low light level end is as the monitoring side.
5. according to claim 2 or the full optical fiber high power picosecond pulse laser amplifier of 3 described a kind of gain narrowings controls, it is characterized in that described fiber optic power amplifier (2) comprises isolator (21), amplifier pumping source (22), bundling device (23) or wavelength division multiplexer, amplifier gain optical fiber (24); The seed pulse of full optical fiber psec seed source (1) output is input on the isolator (21), be input to amplifier gain optical fiber (24) through the pulse behind the isolator (21), the pump light of amplifier pumping source (22) output is coupled in the amplifier gain optical fiber (24) through wavelength division multiplexer or bundling device (23), described output module (3) adopts output coupler (31), the picopulse of the amplification of wavelength division multiplexer or bundling device (23) output is through output coupler (31), the high light end of described output coupler is as final output, and low light level end is as the monitoring side.
6. the full optical fiber high power picosecond pulse laser amplifier of a kind of gain narrowing control according to claim 4, it is characterized in that described fiber optic power amplifier (2) also comprises filter (20), filter (20) is connected on the inclined to one side output of non-guarantor (9) of full optical fiber psec seed source (1).
7. the full optical fiber high power picosecond pulse laser amplifier of a kind of gain narrowing control according to claim 1, it is characterized in that described output module (3) adopts output coupler (31), the picopulse that the output of fiber optic power amplifier (2) output is amplified is through output coupler (31), the splitting ratio of described output coupler is 1:99, the high light end is as final output, and low light level end is as the monitoring side.
8. the full optical fiber high power picosecond pulse laser amplifier of a kind of gain narrowing control according to claim 4 is characterized in that described amplifier pumping source (22) is single mode or multimode, the continuous conductor laser of power output between 0.5-10W.
9. the full optical fiber high power picosecond pulse laser amplifier of a kind of gain narrowing control according to claim 4 is characterized in that amplifier gain optical fiber (24) is for mixing ytterbium phosphate single mode or doubly clad optical fiber.
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| CN108879300B (en) * | 2018-06-04 | 2024-04-05 | 华南师范大学 | Supercontinuum light source system and method based on double-constraint mode-locked pulse pumping |
| CN109687269A (en) * | 2019-01-24 | 2019-04-26 | 中国科学院西安光学精密机械研究所 | A kind of 1.7 based on thulium-doped silica fib μm mode locked fiber laser |
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| CN112582865B (en) * | 2020-10-26 | 2021-10-08 | 上海交通大学 | Self-mode-locking single-frequency all-fiber laser |
| CN112582865A (en) * | 2020-10-26 | 2021-03-30 | 上海交通大学 | Self-mode-locking single-frequency all-fiber laser |
| CN113036584A (en) * | 2021-03-02 | 2021-06-25 | 江苏科技大学 | Ultrashort pulse vortex light beam generating device |
| CN113708203A (en) * | 2021-08-25 | 2021-11-26 | 吉林大学 | Stable high-power ultrashort pulse generation system |
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