CN105406329A - 2um q-switched pulse thulium-doped fiber laser - Google Patents
2um q-switched pulse thulium-doped fiber laser Download PDFInfo
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- CN105406329A CN105406329A CN201510807519.5A CN201510807519A CN105406329A CN 105406329 A CN105406329 A CN 105406329A CN 201510807519 A CN201510807519 A CN 201510807519A CN 105406329 A CN105406329 A CN 105406329A
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Abstract
The invention is applicable to the technical field of fiber lasers, and provides a 2um q-switched pulse thulium-doped fiber laser. The laser comprises a circuit module and a light path module; the light path module comprises a seed source module, at least a first optical fiber amplifying apparatus, at least a second optical fiber amplifying apparatus, a photoelectric protection apparatus and a collimation output optoisolator that are arranged in sequence along the same optical axis; the seed source module comprises a first pump laser, a high reflectance fiber bragg grating, a low reflectance fiber bragg grating, a first beam combiner, a first gain optical fiber and a modulator; the light path module is provided with an optical passive device; the optical passive device comprises preserving polarization fibers; and the output laser of the 2um q-switched pulse thulium-doped fiber laser comprises a random polarization mode or a linear polarization mode. Therefore, the 2um q-switched pulse thulium-doped fiber laser can realize random polarization output as well as linear polarization output.
Description
Technical field
The present invention relates to fiber laser technology field, particularly relate to a kind of 2um Q impulse thulium-doped fiber laser.
Background technology
The thulium laser of mixing operating in 2 micron waveband scope eye-safe spectral regions all has fabulous researching value and huge application prospect in fields such as operation, laser radar, remote sensing, propagation in atmosphere, military affairs and industrial processes, is be all the direction received much concern all the time.These application nearly all need the pulse thulium doped optical fiber laser of high-peak power, and thulium-doped fiber laser majority is export continuously at present, and the thulium-doped fiber laser power output that a few pulses exports is lower, and pulse duration is wider, and peak power is lower.In addition, current thulium-doped fiber laser mostly is random polarization and exports, and cannot meet the requirement of application as laser radar, non-linear wavelength convert etc. of some needs linearly polarized lasers.On the other hand, with mix all-fiber laser compared with thulium solid state laser there is the advantages such as small-sized, compact, good stability, become an important trend of fiber laser development, such as 1.94mm is can by the useful wavelength absorbed in a large number in tissue, it can rapid cleaning cutting and bleed less.In urology field, the light source of a large amount of research institutes application is at present all Ho:YAG (mixing holmium yttrium-aluminium-garnet) laser.And thulium-doped fiber laser launches in the clinical practice of cutting tissue and prostate excision.It is the potential replacer of Ho:YAG laser.Because it can continuously and pulsing operation, this is concerning very important a lot of application, and in addition, it also has very high light beam quality and high laser-conversion efficiency.So, realize high-average power, narrow spaces, high-peak power can the high stability that exports of random polarization or linear polarization to mix thulium pulse optical fiber significant.
In summary, obviously there is inconvenience and defect in actual use in prior art, so be necessary to be improved.
Summary of the invention
For above-mentioned defect, the object of the present invention is to provide a kind of 2um Q impulse thulium-doped fiber laser, object be to realize a kind of can random polarization export also can the pulse optical fiber of high stability that exports of linear polarization, and can high-average power, narrow spaces, high-peak power.
To achieve these goals, the invention provides a kind of 2um Q impulse thulium-doped fiber laser, comprise circuit module and light path module, described light path module comprises seed resource module, at least one first optical fiber amplifying device, at least one the second optical fiber amplifying device, photoelectric protector and collimation output optical isolator that same optical axis connects successively;
Described seed resource module comprises the first pump laser, high reflectance fiber grating, antiradar reflectivity fiber grating, the first bundling device, the first gain fibre and modulator; Described first optical fiber amplifying device comprises the first online optical isolator, the first fiber amplifier, the second gain fibre, the second pump laser, the second bundling device; Described second optical fiber amplifying device comprises the second online optical isolator, the second fiber amplifier, the 3rd pump laser, the 3rd bundling device and the 3rd gain fibre; Arrange optical passive component in described light path module, described optical passive component comprises polarization maintaining optical fibre, and the Output of laser of described 2um Q impulse thulium-doped fiber laser also comprises random polarization pattern or linear polarization pattern.
According to 2um Q impulse thulium-doped fiber laser of the present invention, described circuit module comprises:
Pumping drive circuit, for driving described first pump laser, described second pump laser, described 3rd pump laser generation continuous laser;
Modulator driver circuit, for driving described modulator and by the quality factor changing resonant cavity, continuous laser being become pulse laser, described modulator driver circuit changes the repetition rate exporting pulse laser by the signal of telecommunication;
Control circuit, for regulating powering on and power-off sequential of described seed resource module, described first optical fiber amplifying device and described second optical fiber amplifying device, described control circuit passes through the setup parameter of man-machine interface to control power and the repetition rate of Output of laser;
Protective circuit, for monitoring and the protection on the temperature and light road of described 2um Q impulse thulium-doped fiber laser.
According to 2um Q impulse thulium-doped fiber laser of the present invention, described seed resource module comprises forward pumping structure or counter-pumping configuration;
The described seed resource module of forward pumping vibrational power flow comprises the described high reflectance fiber grating connected successively, described first pump laser, described first bundling device, described first gain fibre, described modulator and antiradar reflectivity fiber grating, the signal input part of described first bundling device is connected to described high reflectance fiber grating, the signal output part of described first bundling device is connected to the first gain fibre, and the pumping end of described first bundling device is connected to described first pump laser; Or
The described seed resource module that counter-pumping configuration is arranged comprises the described high reflectance fiber grating connected successively, described modulator, described first gain fibre, described first pump laser, described first bundling device and described antiradar reflectivity fiber grating, described first bundling device signal input part is connected to described antiradar reflectivity fiber grating, the signal output part of described first bundling device is connected to described first gain fibre, and the pumping end of described first bundling device is connected to described first pump laser.
According to 2um Q impulse thulium-doped fiber laser of the present invention, described seed resource module comprises pumping configuration outside intracavity pump structure or chamber;
The described seed resource module of intracavity pump structure comprises the described high reflectance fiber grating connected successively, described first pump laser, described first bundling device, described first gain fibre, described modulator and described antiradar reflectivity fiber grating, described first bundling device signal input part is connected to described high reflectance fiber grating, the signal output part of described first bundling device is connected to described first gain fibre, and the pumping end of described first bundling device is connected to the first pump laser; Or
Outside chamber, the described seed resource module of pumping configuration comprises described first pump laser connected successively, described first bundling device, described high reflectance fiber grating, described first gain fibre, described modulator and described antiradar reflectivity fiber grating, described first bundling device signal input part is not connected with other devices, the signal output part of described first bundling device is connected to described high reflectance fiber grating, and the pumping end of described first bundling device is connected to described first pump laser.
According to 2um Q impulse thulium-doped fiber laser of the present invention, described first fiber amplifier comprises forward pumping structure or counter-pumping configuration;
Described second pump laser, described second bundling device and described second gain fibre that described first fiber amplifier of forward pumping structure connects successively, the signal input part of described second bundling device is connected with the described first online optical isolator output, the signal output part of described second bundling device is connected with described second gain fibre, and the pumping end of described second bundling device is connected to described second pump laser; Or
Described second gain fibre, described second pump laser and described second bundling device that described first fiber amplifier of counter-pumping configuration connects successively, the signal input part of described second bundling device is connected with the input of the described first online optical isolator of described first optical fiber amplifying device of rear stage or the input of the online isolator of described second light of described second optical fiber amplifying device, the signal output part of described second bundling device is connected with described second gain fibre, and the pumping end of described second bundling device is connected to described second pump laser.
According to 2um Q impulse thulium-doped fiber laser of the present invention, described second fiber amplifier comprises forward pumping structure or counter-pumping configuration;
Described second fiber amplifier of forward pumping structure connects described 3rd pump laser, described 3rd bundling device and described 3rd gain fibre successively, the signal input part of described 3rd bundling device is connected with the described second online optical isolator output, the signal output part of described 3rd bundling device is connected with described 3rd gain fibre, and described 3rd bundling device pumping end is connected to described 3rd pump laser;
Described second fiber amplifier of counter-pumping configuration connects described 3rd gain fibre, described 3rd pump laser and described 3rd bundling device successively, the input that the input of the signal input part of described 3rd bundling device and the described second online optical isolator of described second optical fiber amplifying device of rear stage or described collimation export optical isolator is connected, the signal output part of described 3rd bundling device is connected with the 3rd gain fibre, and the pumping end of described 3rd bundling device is connected to described 3rd pump laser.
According to 2um Q impulse thulium-doped fiber laser of the present invention; described photoelectric protector is arranged on described 3rd gain fibre and describedly collimates the fusion point place exporting optical isolator, and described photoelectric protector comprises coupler, band optical fiber electric explorer that splitting ratio is 99.9%:0.1% and is not with optical fiber electric explorer.
According to 2um Q impulse thulium-doped fiber laser of the present invention, the reflectivity of described high reflectance fiber grating is 99.9%, described antiradar reflectivity fiber grating reflectivity is 15%-20%, the centre wavelength 793nm of described first pump laser, described second pump laser centre wavelength 793nm.
According to 2um Q impulse thulium-doped fiber laser of the present invention, described linear polarization pattern comprises first kind of way, described first kind of way comprises: described high reflectance fiber grating and described antiradar reflectivity fiber grating are single polarization associated fiber grating, described first gain fibre, described second gain fibre and described 3rd gain fibre are also all polarization maintaining optical fibre and for mixing thulium doubly clad optical fiber, the signal optical fibre of the described optical passive component in described light path module is polarization maintaining optical fibre.
According to 2um Q impulse thulium-doped fiber laser of the present invention, described linear polarization pattern comprises first kind of way, the described second way comprises: described seed resource module and described first optical fiber amplifying device directly add the optical fiber polarizer, and described optical passive component and the thulium doped fiber of described first optical fiber amplifying device, described second optical fiber amplifying device and described collimation output optical isolator are all polarization maintaining optical fibre.
The present invention mixes the setting of thulium doubly clad optical fiber and the structural design of light path module by adopting, and realizes the Q impulse fiber laser of random polarization or linear polarization, and can high-average power, narrow spaces, high-peak power, has using value.
Accompanying drawing explanation
Fig. 1 is the structural representation of 2um Q impulse thulium-doped fiber laser first embodiment of the present invention;
Fig. 2 is pumping configuration schematic diagram outside 2um Q impulse thulium-doped fiber laser seed resource module chamber of the present invention;
Fig. 3 is 2um Q impulse thulium-doped fiber laser seed resource module counter-pumping configuration schematic diagram of the present invention;
Fig. 4 is 2um Q impulse thulium-doped fiber laser first optical fiber amplifying device counter-pumping configuration schematic diagram of the present invention;
Fig. 5 is 2um Q impulse thulium-doped fiber laser second optical fiber amplifying device counter-pumping configuration schematic diagram of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Composition graphs diagram 1 ~ Fig. 5 explanation, see Fig. 1, the invention provides a kind of 2um Q impulse thulium-doped fiber laser, comprise circuit module 2 and light path module 1, described light path module 1 comprises seed resource module 3, at least one first optical fiber amplifying device 4, at least one second optical fiber amplifying device 5, photoelectric protector 6 and the collimation output optical isolator 7 that same optical axis connects successively;
Described seed resource module 3 comprises the first pump laser 13, high reflectance fiber grating 12, antiradar reflectivity fiber grating 17, first bundling device 14, first gain fibre 15 and modulator 16; Described first optical fiber amplifying device 4 comprises the first online optical isolator 18, first fiber amplifier 19, second gain fibre 22, second pump laser 20, second bundling device 21; Described second optical fiber amplifying device 5 comprises the second online optical isolator 23, second fiber amplifier 24, the 3rd pump laser 25, the 3rd bundling device 26 and the 3rd gain fibre 27; Arrange optical passive component in described light path module 1, described optical passive component comprises polarization maintaining optical fibre, and the Output of laser of described 2um Q impulse thulium-doped fiber laser comprises random polarization pattern or linear polarization pattern.Described modulator 16 is acousto-optic modulator or electrooptic modulator.
Described 2um Q impulse thulium-doped fiber laser, preferred, described circuit module comprises:
Pumping drive circuit 9, produces continuous laser for driving described first pump laser 13, described second pump laser 20, described 3rd pump laser 25;
Modulator driver circuit 8, for driving described modulator 16 and by the quality factor changing resonant cavity, continuous laser being become pulse laser, described modulator driver circuit 8 changes the repetition rate exporting pulse laser by the signal of telecommunication; Acousto-optic modulator or electrooptic modulator is adopted to mate according to modulator 16.
Control circuit 10, for regulating powering on and power-off sequential of described seed resource module, described first optical fiber amplifying device 4 and described second optical fiber amplifying device 5, described control circuit 10 passes through the setup parameter of man-machine interface to control power and the repetition rate of Output of laser;
Protective circuit 11, for monitoring and the protection on the temperature and light road of described 2um Q impulse thulium-doped fiber laser.
Further, described linear polarization pattern comprises first kind of way, described first kind of way comprises: described high reflectance fiber grating 12 and described antiradar reflectivity fiber grating 17 are single polarization associated fiber grating, described first gain fibre 15, described second gain fibre 22 and described 3rd gain fibre 27 are also all polarization maintaining optical fibre and for mixing thulium doubly clad optical fiber, the signal optical fibre of the described optical passive component in described light path module 1 is polarization maintaining optical fibre.Described optical passive component is distinguished with the optical passive component not arranging polarization maintaining optical fibre, herein, described optical passive component refers to the optical passive component in described light path module 1 except described high reflectance fiber grating 12 and described antiradar reflectivity fiber grating 17, described first gain fibre 15, described second gain fibre 22 and described 3rd gain fibre 27.
Relative to first kind of way, can alternative be, described linear polarization pattern comprises the second way, the described second way comprises: directly add the optical fiber polarizer at described seed resource module 3 and described first optical fiber amplifying device 4 place, described first optical fiber amplifying device 4, described second optical fiber amplifying device 5 and described collimation export optical isolator 7 and are provided with described optical passive component and thulium doped fiber, and described optical passive component and described thulium doped fiber are all polarization maintaining optical fibre.
Further, described 2um Q impulse thulium-doped fiber laser, described seed resource module 3 comprises forward pumping structure or counter-pumping configuration;
As shown in Figure 1, the described seed resource module 3 of forward pumping vibrational power flow comprises the high reflectance fiber grating 12 connected successively, first pump laser 13, first bundling device 14, first gain fibre 15, modulator 16 and antiradar reflectivity fiber grating 17, the signal input part of described first bundling device 14 is connected to described high reflectance fiber grating 12, the signal output part of described first bundling device 14 is connected to the first gain fibre 15, the pumping end of described first bundling device 14 is connected to described first pump laser 13, M bar pumping end is connected to N number of first pump laser 13 (M >=N >=1), or
The described seed resource module 3 that counter-pumping configuration is arranged comprises the described high reflectance fiber grating 12 connected successively, described modulator 16, described first gain fibre 15, described first pump laser 13, described first bundling device 14 and described antiradar reflectivity fiber grating 17, described first bundling device 14 signal input part is connected to described antiradar reflectivity fiber grating 17, the signal output part of described first bundling device 14 is connected to described first gain fibre 15, the pumping end of described first bundling device 14 is connected to described first pump laser 13, M bar pumping end is connected to N number of first pump laser 13 (M >=N >=1).
In addition, described 2um Q impulse thulium-doped fiber laser, described seed resource module 3 comprises pumping configuration outside intracavity pump structure or chamber;
As shown in Figure 1, the described seed resource module 3 of intracavity pump structure comprises the described high reflectance fiber grating 12 connected successively, described first pump laser 13, described first bundling device 14, described first gain fibre 15, described modulator 16 and described antiradar reflectivity fiber grating 17, described first bundling device 14 signal input part is connected to described high reflectance fiber grating 12, the signal output part of described first bundling device 14 is connected to described first gain fibre 15, the pumping end of described first bundling device 14 is connected to the first pump laser 13, M1 bar pumping end is connected to N1 the first pump laser 13 (M1 >=N1 >=1), or
As shown in Figure 2, outside chamber, the described seed resource module 3 of pumping configuration comprises described first pump laser 13 connected successively, described first bundling device 14, described high reflectance fiber grating 12, described first gain fibre 15, described modulator 16 and described antiradar reflectivity fiber grating 17, described first bundling device 14 signal input part is not connected with other devices, the signal output part of described first bundling device 14 is connected to described high reflectance fiber grating 12, the pumping end of described first bundling device 14 is connected to described first pump laser 13, M1 bar pumping end is connected to N1 the first pump laser 13 (M1 >=N1 >=1).
Further, described 2um Q impulse thulium-doped fiber laser, described first fiber amplifier 4 comprises forward pumping structure or counter-pumping configuration;
As shown in Figure 1, described second pump laser 20, described second bundling device 21 and described second gain fibre 22 that described first fiber amplifier 4 of forward pumping structure connects successively, the signal input part of described second bundling device 21 is connected with the described first online optical isolator 18 output, the signal output part of described second bundling device 21 is connected with described second gain fibre 22, the pumping end of described second bundling device 21 is connected to described second pump laser 20, M2 bar pumping end and is connected to N2 the second pump laser 20 (M2 >=N2 >=1); Or
As shown in Figure 4, described second gain fibre 22 that described first fiber amplifier 19 of counter-pumping configuration connects successively, described second pump laser 20 and described second bundling device 21, the signal input part of described second bundling device 21 is connected with the input of the described first online optical isolator 18 input of described first optical fiber amplifying device 4 of rear stage or the described second online optical isolator 23 of described second optical fiber amplifying device 5, the signal output part of described second bundling device 21 is connected with described second gain fibre 22, the pumping end of described second bundling device 21 is connected to described second pump laser 20, M2 bar pumping end is connected to N2 the second pump laser 20 (M2 >=N2 >=1), the advantage of the first fiber amplifier 19 of forward pumping structure is that the signal to noise ratio of amplifier out is higher than counter-pumping configuration, and the advantage of the first fiber amplifier 19 of counter-pumping configuration is that the gain ability of amplifier is higher than forward pumping structure.
Described 2um Q impulse thulium-doped fiber laser further, described second fiber amplifier 24 comprises forward pumping structure or counter-pumping configuration;
As shown in Figure 1, described second fiber amplifier 24 of forward pumping structure connects described 3rd pump laser 25, described 3rd bundling device 26 and described 3rd gain fibre 27 successively, the signal input part of described 3rd bundling device 26 is connected with the described second online optical isolator 23 output, the signal output part of described 3rd bundling device 26 is connected with described 3rd gain fibre 27, the pumping end of described 3rd bundling device 26 is connected to described 3rd pump laser 25, M3 articles of pumping ends and is connected to N3 the 3rd pump laser 25 (M3 >=N3 >=1); Or
As shown in Figure 5, described second fiber amplifier 24 of counter-pumping configuration connects described 3rd gain fibre 27 successively, described 3rd pump laser 25 and described 3rd bundling device 26, the input that the input of the signal input part of the 3rd bundling device 26 and the described second online optical isolator 23 of described second optical fiber amplifying device 5 of rear stage or described collimation export optical isolator 7 is connected, the signal output part of described 3rd bundling device 26 is connected with the 3rd gain fibre 27, the pumping end of described 3rd bundling device 26 is connected to described 3rd pump laser 25, M3 article pumping end is connected to N3 the 3rd pump laser 25 (M3 >=N3 >=1), the advantage of the first fiber amplifier 19 of forward pumping structure is that the signal to noise ratio of amplifier out is higher than backward pumping, and the advantage of the first fiber amplifier 19 of counter-pumping configuration is that the gain ability of amplifier is higher than forward pumping.
Further; described photoelectric protector 6 is arranged on described 3rd gain fibre 27 and collimate with described the fusion point place exporting optical isolator 7, and described photoelectric protector 6 comprises coupler 28 that splitting ratio is 99.9%:0.1%, is with optical fiber electric explorer 29 and is not with optical fiber electric explorer 30 to form.Wherein coupler 28 and band optical fiber electric explorer 29 are for detecting light echo power, can power-off immediately avoid light echo oppositely to amplify damage optical fiber through the 3rd gain fibre 27 if light echo crosses forceful electric power road; Not being with optical fiber electric explorer 30 whether impaired for detecting light path, can power-off immediately preventing lasting light leak from bringing Continuous Damage to light path once optical fiber blows.The two collaborative work plays a protective role to laser light path part.
Described 2um Q impulse thulium-doped fiber laser specific embodiment, as shown in Figure 1, repetition rate is set to 30KHz, high reflectance fiber grating 12 reflectivity is 99.9% antiradar reflectivity fiber grating 17 reflectivity is 15%-20%, first pump laser centre wavelength 793nm, first gain fibre is for mixing thulium doubly clad optical fiber, modulator 16 adopts acousto-optic modulator, modulator 16 constantly changes the quality factor of the resonant cavity of seed resource module 3, continuous laser is become pulse laser, seed resource module 3 power output is 789mw, pulsewidth 90ns, repetition rate 30KHz.Flashlight enters the first fiber amplifier and prime amplifier after the online isolator 18 of the first light, second pump laser centre wavelength 793nm, second gain fibre 22 is for mixing thulium doubly clad optical fiber, after the first fiber amplifier, flashlight is enlarged into 3.4W, pulse duration is about 95ns, and repetition rate is 30KHz.Flashlight enters the second fiber amplifier 5 i.e. main power amplifier after the second online isolator, 3rd pump laser centre wavelength 793nm, 3rd gain fibre 27 is for mixing thulium doubly clad optical fiber, it is 31.3W that flashlight after amplifying exports isolator output valve from collimation, about pulsewidth 105ns, repetition rate 30KHz, obtaining peak power is as calculated 9.9KW.
In another specific embodiment, as shown in Figure 1, as shown in Figure 1, repetition rate is set to 25KHz, polarization high reflectance fiber grating 12 reflectivity of being correlated with is 99.9%, antiradar reflectivity fiber grating 17 reflectivity that single polarization is relevant is 15%-20%, first pump laser 13 centre wavelength 793nm, first gain fibre is for mixing thulium doubly clad optical fiber, modulator 16 is owing to adopting acousto-optic modulator, the quality factor of the resonant cavity of continuous change seed resource module 3, continuous laser is become pulse laser, seed resource module 3 power output is 846mW, pulsewidth 95ns, repetition rate 25000Hz, extinction ratio 23dB.Flashlight enters the first fiber amplifier and prime amplifier after the online isolator 18 of the first light, cardiac wave 793nm in second pump laser, second gain fibre 22 mixes thulium doubly clad optical fiber partially for protecting, after the first fiber amplifier, flashlight is enlarged into 2.8W, pulse duration is about 100ns, repetition rate is 25000Hz, extinction ratio 22dB.Flashlight enters the second fiber amplifier 5 i.e. main power amplifier after the second online isolator, 3rd pump laser centre wavelength 793nm, 3rd gain fibre mixes thulium doubly clad optical fiber partially for protecting, it is 25.8W that flashlight after amplifying exports isolator output valve from collimation, about pulsewidth 105ns, repetition rate 25000Hz, obtaining peak power is as calculated 9.8KW, extinction ratio 19dB.
In sum, the present invention is directed to the present invention and produce narrow spaces pulse light by adjusting Q seed resource module, large and the main power amplification by prevention multistage below, achieve more than average power 30W, the high-average power of about pulse duration 100ns, more than peak power 10KW, narrow spaces, high-peak power Laser output.Various application scenario can well be met, present invention also offers the specific implementation that two kinds of linearly polarized lasers export, further expanded the application of this kind of 2um wavelength band pulse optical fiber.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
Claims (10)
1. a 2um Q impulse thulium-doped fiber laser, comprise circuit module and light path module, it is characterized in that, described light path module comprises seed resource module, at least one first optical fiber amplifying device, at least one the second optical fiber amplifying device, photoelectric protector and collimation output optical isolator that same optical axis connects successively;
Described seed resource module comprises the first pump laser, high reflectance fiber grating, antiradar reflectivity fiber grating, the first bundling device, the first gain fibre and modulator; Described first optical fiber amplifying device comprises the first online optical isolator, the first fiber amplifier, the second gain fibre, the second pump laser, the second bundling device; Described second optical fiber amplifying device comprises the second online optical isolator, the second fiber amplifier, the 3rd pump laser, the 3rd bundling device and the 3rd gain fibre; Arrange optical passive component in described light path module, described optical passive component comprises polarization maintaining optical fibre, and the Output of laser of described 2um Q impulse thulium-doped fiber laser also comprises random polarization pattern or linear polarization pattern.
2. 2um Q impulse thulium-doped fiber laser according to claim 1, it is characterized in that, described circuit module comprises:
Pumping drive circuit, for driving described first pump laser, described second pump laser, described 3rd pump laser generation continuous laser;
Modulator driver circuit, for driving described modulator and by the quality factor changing resonant cavity, continuous laser being become pulse laser, described modulator driver circuit changes the repetition rate exporting pulse laser by the signal of telecommunication; Described modulator is acousto-optic modulator or electrooptic modulator;
Control circuit, for regulating powering on and power-off sequential of described seed resource module, described first optical fiber amplifying device and described second optical fiber amplifying device, described control circuit passes through the setup parameter of man-machine interface to control power and the repetition rate of Output of laser;
Protective circuit, for monitoring and the protection on the temperature and light road of described 2um Q impulse thulium-doped fiber laser.
3. 2um Q impulse thulium-doped fiber laser according to claim 1, it is characterized in that, described seed resource module comprises forward pumping structure or counter-pumping configuration;
The described seed resource module of forward pumping vibrational power flow comprises the described high reflectance fiber grating connected successively, described first pump laser, described first bundling device, described first gain fibre, described modulator and described antiradar reflectivity fiber grating, the signal input part of described first bundling device is connected to described high reflectance fiber grating, the signal output part of described first bundling device is connected to described first gain fibre, and the pumping end of described first bundling device is connected to described first pump laser; Or
The described seed resource module that counter-pumping configuration is arranged comprises the described high reflectance fiber grating connected successively, described modulator, described first gain fibre, described first pump laser, described first bundling device and described antiradar reflectivity fiber grating, described first bundling device signal input part is connected to described antiradar reflectivity fiber grating, the signal output part of described first bundling device is connected to described first gain fibre, and the pumping end of described first bundling device is connected to described first pump laser.
4. 2um Q impulse thulium-doped fiber laser according to claim 1, it is characterized in that, described seed resource module comprises pumping configuration outside intracavity pump structure or chamber;
The described seed resource module of intracavity pump structure comprises the described high reflectance fiber grating connected successively, described first pump laser, described first bundling device, described first gain fibre, described modulator and described antiradar reflectivity fiber grating, described first bundling device signal input part is connected to described high reflectance fiber grating, the signal output part of described first bundling device is connected to described first gain fibre, and the pumping end of described first bundling device is connected to described first pump laser; Or
Outside chamber, the described seed resource module of pumping configuration comprises described first pump laser connected successively, described first bundling device, described high reflectance fiber grating, described first gain fibre, described modulator and described antiradar reflectivity fiber grating, described first bundling device signal input part is not connected with other devices, the signal output part of described first bundling device is connected to described high reflectance fiber grating, and the pumping end of described first bundling device is connected to described first pump laser.
5. 2um Q impulse thulium-doped fiber laser according to claim 1, it is characterized in that, described first fiber amplifier comprises forward pumping structure or counter-pumping configuration;
Described second pump laser, described second bundling device and described second gain fibre that described first fiber amplifier of forward pumping structure connects successively, the signal input part of described second bundling device is connected with the described first online optical isolator output, the signal output part of described second bundling device is connected with described second gain fibre, and the pumping end of described second bundling device is connected to described second pump laser; Or
Described second gain fibre, described second pump laser and described second bundling device that described first fiber amplifier of counter-pumping configuration connects successively, the signal input part of described second bundling device is connected with the input of the described first online optical isolator of described first optical fiber amplifying device of rear stage or the input of the online isolator of described second light of described second optical fiber amplifying device, the signal output part of described second bundling device is connected with described second gain fibre, and the pumping end of described second bundling device is connected to described second pump laser.
6. 2um Q impulse thulium-doped fiber laser according to claim 1, it is characterized in that, described second fiber amplifier comprises forward pumping structure or counter-pumping configuration;
Described second fiber amplifier of forward pumping structure connects described 3rd pump laser, described 3rd bundling device and described 3rd gain fibre successively, the signal input part of described 3rd bundling device is connected with the described second online optical isolator output, the signal output part of described 3rd bundling device is connected with described 3rd gain fibre, and described 3rd bundling device pumping end is connected to described 3rd pump laser;
Described second fiber amplifier of counter-pumping configuration connects described 3rd gain fibre, described 3rd pump laser and described 3rd bundling device successively, the input that the input of the signal input part of described 3rd bundling device and the described second online optical isolator of described second optical fiber amplifying device of rear stage or described collimation export optical isolator is connected, the signal output part of described 3rd bundling device is connected with the 3rd gain fibre, and the pumping end of described 3rd bundling device is connected to described 3rd pump laser.
7. 2um Q impulse thulium-doped fiber laser according to claim 1; it is characterized in that; described photoelectric protector is arranged on described 3rd gain fibre and describedly collimates the fusion point place exporting optical isolator, and described photoelectric protector comprises coupler, band optical fiber electric explorer that splitting ratio is 99.9%:0.1% and is not with optical fiber electric explorer.
8. 2um Q impulse thulium-doped fiber laser according to claim 1, it is characterized in that, the reflectivity of described high reflectance fiber grating is 99.9%, described antiradar reflectivity fiber grating reflectivity is 15%-20%, the centre wavelength 793nm of described first pump laser, described second pump laser centre wavelength 793nm.
9. 2um Q impulse thulium-doped fiber laser according to any one of claim 1 ~ 8, it is characterized in that, described linear polarization pattern comprises first kind of way, described first kind of way comprises: described high reflectance fiber grating and described antiradar reflectivity fiber grating are single polarization associated fiber grating, described first gain fibre, described second gain fibre and described 3rd gain fibre are also all polarization maintaining optical fibre and for mixing thulium doubly clad optical fiber, the signal optical fibre of the described optical passive component in described light path module is polarization maintaining optical fibre.
10. 2um Q impulse thulium-doped fiber laser according to any one of claim 1 ~ 8, it is characterized in that, described linear polarization pattern comprises the second way, the described second way comprises: described seed resource module and described first optical fiber amplifying device directly add the optical fiber polarizer, described first optical fiber amplifying device, described second optical fiber amplifying device and described collimation export optical isolator and are provided with described optical passive component and thulium doped fiber, and described optical passive component and described thulium doped fiber are all polarization maintaining optical fibre.
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