CN208849224U - THz high repetition frequency high power femto second optical fiber laser based on dispersive wave - Google Patents
THz high repetition frequency high power femto second optical fiber laser based on dispersive wave Download PDFInfo
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Abstract
The utility model relates to a kind of THz high repetition frequency high power femto second optical fiber laser based on dispersive wave, including erbium doped fiber laser seed source, frequency upgrading part, amplifier section and Pulse Compression part；The output end of erbium doped fiber laser seed source is connect by highly nonlinear optical fiber with frequency upgrading part, the output end of frequency upgrading part is connected to amplifier section, amplifier section includes pre-amplification part and the main amplifier section of two-stage, and the output end of amplifier section is connected with Pulse Compression part；Nonlinear frequency conversion of the laser signal through highly nonlinear optical fiber that erbium doped fiber laser seed source generates, and pass through frequency upgrading part for its frequency upgrading to THz high repetition frequency, the laser signal of THz high repetition frequency carries out power amplification through pre-amplification part and the main amplifier section of two-stage, using Pulse Compression part, the high power femtosecond pulse signal of THz high repetition frequency is exported.The utility model mounting structure is simple, it is easy to accomplish, it is low in cost, convenient for promoting.
Description
Technical field
The utility model relates to laser technology fields, and in particular to a kind of THz high repetition frequency Gao Gong based on dispersive wave
Rate femto second optical fiber laser.
Background technique
High power femto second optical fiber laser have beam quality is high, thermal stability is good, peak power is high, it is compact-sized, at
The advantages that this is low, environmental stability is good, Maintenance free, in Precision Machining, waveguide etching, supercontinuum generation and laser sensing etc.
Field is using more and more extensive, gradually by the concern of researcher.Currently, the Er-doped fiber of 1550nm wave band is due to having just
It is humorous can preferably to control optical fiber laser by selecting the optical fiber of different length, different dispersions for the optical fiber of dispersion and negative dispersion
Shake intracavitary dispersion values, realizes the output of femtosecond laser signal.And for 1064nm wave band, optical fiber is all in the dispersion values of this wave band
Positive value, chirped fiber Bragg gratings, the photonic crystal fiber that dispersion compensation is carried out to it require to customize, expensive, because
And the ytterbium-doping optical fiber laser of 1064nm wave band obtains femto-second laser pulse and exports difficulty with higher.It is high-power to obtain one
As be using MOPA structure the lower-wattage pulse laser output that mode locking obtains femto second optical fiber laser, amplified by MOPA,
It can be achieved to export compared with high pulse energy and the laser signal of mean power.
It is by higher hamonic wave mode locking and shortening that the main method of high repetition frequency is obtained in passive mode-locking fiber laser
The length of resonant cavity of fibre-optical laser.Higher hamonic wave mode locking needs significantly promote pump laser on the basis of fundamental frequency mode locking
Pump power, since it is not fundamental frequency working condition, uniformity and the stability for exporting laser signal are all poor；And it pumps
The promotion of power will increase the intracavitary pulse energy of entire laser resonator, will affect the service life of passive mode-locking element in this way
And generate multiple-pulse phenomenon.Length for shortening resonant cavity can effectively promote the repetition rate of mode locking pulse, but chamber is shorter
The mode for participating in mode locking is fewer, and mode locking difficulty can also be increase accordingly.In addition, being all difficult to reach for harmonic mode locking and short cavity mode locking
To extra high repetition rate, this is limited by the mechanism of itself, and the repetition rate of THz is extremely difficult to using this two methods.
And needing mode locked fiber laser that there is higher repetition rate in the application of optical frequency com, the high of optical fiber laser repeats
Frequency can increase comb teeth interval, and the requirement of frequency measurement application is met with this；The high-precision radial velocity is fixed in astronomical observation
The scientific researches such as mark problem, accurate distance measurement, precision lidar, national defence, which are also required to optical fiber laser, has high repeat frequently
Rate.
Utility model content
In view of this, it is necessary to provide a kind of stable light beam qualities, the high THz high repetition based on dispersive wave of output power
Frequency high power femto second optical fiber laser.
A kind of THz high repetition frequency high power femto second optical fiber laser based on dispersive wave, including erbium doped fiber laser
Seed source, frequency upgrading part, amplifier section and Pulse Compression part；The output end of the erbium doped fiber laser seed source is logical
It crosses highly nonlinear optical fiber to connect with the frequency upgrading part, the output end of the frequency upgrading part is connected to the enlarging section
Point, the amplifier section includes pre-amplification part and the main amplifier section of two-stage, the output end of the amplifier section and the pulsewidth
Compression section is connected；The laser signal that the erbium doped fiber laser seed source generates is through the non-linear of the highly nonlinear optical fiber
Frequency conversion, and pass through the frequency upgrading part for its frequency upgrading to THz high repetition frequency, the THz high repetition frequency
Laser signal carry out power amplification through the pre-amplification part of the amplifier section and the main amplifier section of two-stage, using the arteries and veins
Wide compression section exports the high power femtosecond pulse signal of THz high repetition frequency.
Further, the erbium doped fiber laser seed source includes laser seed source and Erbium-doped fiber amplifier part,
The laser seed source includes sequentially connected light reflection mirror, the first er-doped gain fibre, the first wavelength division multiplexer and first
Optoisolator；Two input terminals of first wavelength division multiplexer are connected separately with the first er-doped gain fibre and the first list
The output end of mould pump laser and its driving circuit, two output ends of first wavelength division multiplexer are respectively connected to described
The input terminal of first optoisolator and a saturable absorber SESAM module.
Further, first wavelength division multiplexer include sequentially connected first optical fiber collimator, optically filtering piece, partially
Shake piece, Wollaston prism and the second optical fiber collimator；The input terminal of first optical fiber collimator passes through first er-doped
Gain fibre is connected to the light reflection mirror.
Further, the Erbium-doped fiber amplifier part include the second wavelength division multiplexer, the second mode pump laser device and
Its driving circuit and the second er-doped gain fibre, the input terminal of second wavelength division multiplexer are connected to first optoisolator
Output end and the second mode pump laser device and its driving circuit output end, the output end of second wavelength division multiplexer connects
It is connected to the second er-doped gain fibre, the Erbium-doped fiber amplifier part is for promoting the defeated of the erbium doped fiber laser seed source
Power out.
Further, the input terminal of the highly nonlinear optical fiber is connected to the second er-doped gain fibre, the Gao Fei
The output end of linear optical fiber is connected to the frequency upgrading part, the highly nonlinear optical fiber be used for the laser signal of input into
Row nonlinear frequency transformation.
Further, the frequency upgrading part includes cascade 50/50 fiber coupler, cascade 50/50 light
Fine coupler includes the sequentially connected one 1 × 2nd 50/50 fiber coupler, multiple 2 × 2 50/50 fiber coupler and
21 × 2 50/50 fiber coupler, the described one 1 × 2nd 50/50 fiber coupler and the multiple 2 × 2 50/50 light
It is connected between fine coupler using optical fiber, the multiple 2 × 2 50/50 fiber coupler and the described 21 × 2nd 50/50 light
It is connected between fine coupler using optical delay line；The frequency upgrading part is inputted using frequency multiplication step by step for fast lifting
The repetition rate of laser signal.
Further, the pre-amplification part includes first order pre-amplification part and second level pre-amplification part, and described
Level-one pre-amplification part includes third wavelength division multiplexer, third mode pump laser device and its driving circuit, first mixes ytterbium gain
Optical fiber and the second optoisolator, the input terminal of the third wavelength division multiplexer be connected to the frequency upgrading part output end and
Third mode pump laser device and its driving circuit, the third wavelength division multiplexer output end mix ytterbium gain fibre company by first
It is connected to the second optoisolator；Second level pre-amplification part include the 4th wavelength division multiplexer, the 4th mode pump laser device and
Its driving circuit, second mix ytterbium gain fibre and third optoisolator, and the input terminal of the 4th wavelength division multiplexer is connected to institute
State the output end and the 4th mode pump laser device and its driving circuit of first order pre-amplification part, the 4th wavelength division multiplexer
Output end mixes ytterbium gain fibre by second and is connected to third optoisolator.
Further, the main amplifier section includes the main amplifier section in the main amplifier section of the first order and the second level, and described
The main amplifier section of level-one includes (2+1) × 1 combiner device, a pair of of multimode pump laser and its driving circuit, the first double clad
Yb dosed optical fiber and the first high power light isolator, the input terminal of (2+1) × 1 combiner device are connected to the second level and put in advance
Most output end and a pair of of multimode pump laser and its driving circuit, the output end of (2+1) × 1 combiner device are logical
It crosses the first Double Cladding Ytterbium Doped Fiber and is connected to the first high power light isolator；The main amplifier section in the second level includes (6+1) × 1
It is combiner device, two groups of multimode pump lasers and its driving circuit, the second Double Cladding Ytterbium Doped Fiber, leakage of pumping device, second high
The input terminal of power optoisolator and end cap, (6+1) × 1 combiner device is connected to the defeated of the main amplifier section of the first order
The output end of outlet and two groups of multimode pump lasers and its driving circuit, (6+1) × 1 combiner device passes through the second double-contracting
Layer Yb dosed optical fiber is sequentially connected to leakage of pumping device, the second high power light isolator and end cap.
Further, the leakage of pumping device is for filtering out residual pump light；The end cap be used for output signal light into
Row expands, and causes to damage to avoid to fiber end face；The first high power light isolator and second high power light isolation
Device is used for the one-way transmission of laser signal.
Further, the Pulse Compression part includes collimating mirror, diffraction grating to, reflecting mirror and outgoing mirror, described to spread out
Grating is penetrated to for compressing to the high power femtosecond pulse signal of output, realizes the laser pulse signal of more burst pulse
Output；After laser signal passes through the collimating mirror, compressed by the diffraction grating to the reflecting mirror, then through described defeated
Appearance output.
In the above-mentioned THz high repetition frequency high power femto second optical fiber laser based on dispersive wave, using Erbium doped fiber laser
Device seed source generates the femtosecond pulse signal of higher repetitive frequency, by after the amplification of this signal by the non-of one section of highly nonlinear optical fiber
Linear frequency conversion, then the multiple stage frequency lift portion being made up of coupler obtain the femtosecond pulse letter of THz high repetition frequency
Number, then pass through the MOPA structure of Yb dosed optical fiber pre-amplification and the main amplification of two-stage yb-doped double-clad fiber, by the Gao Chong of low-power
Complex frequency femtosecond pulse signal is amplified to tens watts of laser signal output, and carries out Pulse Compression outside chamber to it, to obtain
The high-power laser signal of THz high repetition frequency exports.The mounting structure of this method is simple, it is easy to accomplish, it is low in cost, just
In popularization.
Detailed description of the invention
Fig. 1 is THz high repetition frequency high power femto second optical fiber laser of the utility model embodiment based on dispersive wave
Structural schematic diagram.
Specific embodiment
The utility model is described in detail below with reference to specific embodiments and the drawings.
Referring to Fig. 1, showing a kind of THz high repetition frequency high power femto second optical fiber laser 100 based on dispersive wave, wrap
Include erbium doped fiber laser seed source 13, frequency upgrading part 27, amplifier section and Pulse Compression part 56；The Er-doped fiber
The output end of laser seed source 13 is connect by highly nonlinear optical fiber 19 with the frequency upgrading part 27, the frequency upgrading
The output end of part 27 is connected to the amplifier section, and the amplifier section includes pre-amplification part 37 and the main amplifier section of two-stage
50, the output end of the amplifier section is connected with the Pulse Compression part 56；The erbium doped fiber laser seed source 13 produces
Nonlinear frequency conversion of the raw laser signal through the highly nonlinear optical fiber 19, and by the frequency upgrading part 27 by its
Frequency upgrading is to THz high repetition frequency, and the laser signal of the THz high repetition frequency is through the pre-amplification part of the amplifier section
37 and the main amplifier section 50 of two-stage carry out power amplification, using the Pulse Compression part 56, export THz high repetition frequency
The output of high power femtosecond pulse signal.
Further, the erbium doped fiber laser seed source 13 includes laser seed source and Erbium-doped fiber amplifier part
18, the laser seed source includes sequentially connected light reflection mirror 1, the first er-doped gain fibre 2, the first wavelength division multiplexer 10
With the first optoisolator 7；Two input terminals of first wavelength division multiplexer 10 are connected separately with the first er-doped gain light
The output end of fibre 2 and the first mode pump laser device 9 and its driving circuit, two outputs of first wavelength division multiplexer 10
End is respectively connected to the input terminal of first optoisolator 7 and a saturable absorber SESAM module 11.The first wave
Division multiplexer 10 includes sequentially connected first optical fiber collimator 3, optically filtering piece 4, polarizing film 5,12 and of Wollaston prism
Second optical fiber collimator 6；The input terminal of first optical fiber collimator 3 is connected to institute by the first er-doped gain fibre 2
State light reflection mirror 1.The Erbium-doped fiber amplifier part 18 is used to be promoted the output work of the erbium doped fiber laser seed source 13
Rate, the Erbium-doped fiber amplifier part 18 include the second wavelength division multiplexer 16, the second mode pump laser device 15 and its driving electricity
Road and the second er-doped gain fibre 17, the input terminal of second wavelength division multiplexer 16 are connected to first optoisolator 7
The output end of output end and the second mode pump laser device 15 and its driving circuit, the input terminal of second wavelength division multiplexer 16
It is connected to the second er-doped gain fibre 17.
Specifically, in the present embodiment, first wavelength division multiplexer 10 and second wavelength division multiplexer 16 use four
980/1550 wavelength division multiplexer of port.The reflection input terminal of one end of the light reflection mirror 1 and first wavelength division multiplexer 10
One section of high concentration erbium doped fiber is shared, the signal output end and collimator of first wavelength division multiplexer 10 pass through one section of short-tail fibre
Connection, the chamber that resonant cavity can be effectively reduced are long.
Specifically, the adjustable output power of output percentage of first wavelength division multiplexer 10, but it exports percentage
Than that need to cooperate with the length of the first er-doped gain fibre 2 and tail optical fiber in resonant cavity, to choose intra-cavity dispersion appropriate；The light
Integration packaging filter plate in reflecting mirror 1, the filter plate are used to control the central wavelength and spectral bandwidth of output signal, with
Reduce entire seed source system noise.First optical fiber collimator 3, the light reflection mirror 1 have carried out optical fiberization encapsulation, described
Second optical fiber collimator 6 uses modularized encapsulation with saturable absorber SESAM module 11, to guarantee the stability and knot of system
The compactedness of structure.
Preferably, the erbium doped fiber laser seed source 13 carries out mode locking using saturable absorber SESAM module 11,
It selects the parameters such as saturation flux, modulation depth and relaxation time appropriate to match with laser resonant cavity intrinsic parameter and realizes femtosecond arteries and veins
Punching output；To prevent 11 thermal damage of saturable absorber SESAM module, SESAM can be pasted onto the heat dissipation material such as copper product or aluminium
Expect on pedestal, and is encapsulated by glass tube.
In order to guarantee in system operation not by the interference of external environment, in the erbium doped fiber laser seed source 13
Each component is all made of polarization-maintaining device, and the femtosecond erbium doped fiber laser seed source 13 is made to have self-starting and Low threshold
Energy.
Further, the input terminal of the highly nonlinear optical fiber 19 is connected to the second er-doped gain fibre 17, described
The output end of highly nonlinear optical fiber 19 is connected to the frequency upgrading part 27, and the highly nonlinear optical fiber 19 is used for input
Laser signal carries out nonlinear frequency transformation.
Specifically, using the performance of the nonlinear frequency conversion of the highly nonlinear optical fiber 19 by spectrum from 1550 nanometer waves
For Duan Tuokuan to 1064 nano wavebands, 19 length of highly nonlinear optical fiber is shorter, by the light of itself and the frequency upgrading part 27
The tail optical fiber of fine coupler connects, and since subsequent device and tail optical fiber are all 1064nm wave bands, can filter out to obtain required
The laser signal of 1064nm wave band.
Further, the frequency upgrading part 27 include cascade 50/50 fiber coupler, described cascade 50/50
Fiber coupler includes the sequentially connected one 1 × 2nd 50/50 fiber coupler 20, multiple 2 × 2 50/50 fiber coupler
22 and the 21 × 2nd 50/50 fiber coupler 26, the described one 1 × 2nd 50/50 fiber coupler 20 and the multiple 2 ×
It is connected between 2 50/50 fiber coupler 22 using optical fiber 21, the multiple 2 × 2 50/50 fiber coupler 22 and described
It is connected between 21 × 2nd 50/50 fiber coupler 26 using optical delay line 25；The frequency upgrading part 27 using by
Grade frequency multiplication, the repetition rate for fast lifting input laser signal.
Specifically, the tail optical fiber of the fiber coupler uses 1060 optical fiber of HI, the lower fiber coupler two of repetition rate
The arm length difference of port is obtained by the tail optical fiber length of control two-port, and need to be with the repetition frequency for the femtosecond pulse signal for entering this grade
Rate matching.
Preferably, when entering repetition rate higher what last fiber coupler two-port arm length difference already below milli
Meter level, is difficult to control by tail optical fiber length difference, and optical delay line 25 can be used at this time to pulse signal and provide delay, obtain THz
The femtosecond pulse of the 1064nm wave band of high repetition frequency.
Further, the pre-amplification part 37 includes first order pre-amplification part and second level pre-amplification part, described
First order pre-amplification part includes third wavelength division multiplexer 29, third mode pump laser device 57 and its driving circuit, first mixes
Ytterbium gain fibre 30 and the second optoisolator 31, the input terminal of the third wavelength division multiplexer 29 are connected to the frequency upgrading portion
Points 27 output end and third mode pump laser device 57 and its driving circuit, 29 output end of third wavelength division multiplexer are logical
It crosses first and mixes ytterbium gain fibre 30 and be connected to the second optoisolator 31；Second level pre-amplification part includes the 4th wavelength-division multiplex
Device 33, the 4th mode pump laser device 32 and its driving circuit, second mix ytterbium gain fibre 35 and third optoisolator 36, described
The input terminal of 4th wavelength division multiplexer 33 is connected to the output end and the 4th mode pump laser of first order pre-amplification part
Device 32 and its driving circuit, 33 output end of the 4th wavelength division multiplexer mix ytterbium gain fibre 35 by second and are connected to third light
Isolator 36.
Further, the main amplifier section 50 includes the main amplifier section in the main amplifier section of the first order and the second level, described
The main amplifier section of the first order includes (2+1) × 1 combiner device 40, a pair of of multimode pump laser 38,39 and its driving circuit, the
The input terminal of one Double Cladding Ytterbium Doped Fiber 41 and the first high power light isolator 42, (2+1) × 1 combiner device 40 is connected to
The output end of second level pre-amplification part and a pair of of multimode pump laser 38,39 and its driving circuit, (2+1) ×
The output end of 1 combiner device 40 is connected to the first high power light isolator 42 by the first Double Cladding Ytterbium Doped Fiber 41；Described
The main amplifier section of second level includes 45, two groups of multimode pump lasers 43,44 of (6+1) × 1 combiner device and its driving circuit, second
Double Cladding Ytterbium Doped Fiber 46, leakage of pumping device 47, the second high power light isolator 48 and end cap 49, (6+1) × 1 combiner
The input terminal of device 4545 be connected to the main amplifier section of the first order output end and two groups of multimode pump lasers 43,44 and its
The output end of driving circuit, (6+1) × 1 combiner device 45 is sequentially connected to pump by the second Double Cladding Ytterbium Doped Fiber 46
Leak artifact 47, the second high power light isolator 48 and end cap 49.The leakage of pumping device 47 is for filtering out residual pump light；It is described
End cap 49 causes to damage for expanding output signal light to avoid to fiber end face；The first high power light isolation
Device 42 and the second high power light isolator 48 are used for the one-way transmission of laser signal.
Specifically, described (2+1) × 1 optical-fiber bundling device and (6+1) × 1 combiner device 45 are by multimode pump laser
Coupling pump light enter in first Double Cladding Ytterbium Doped Fiber 41 and second Double Cladding Ytterbium Doped Fiber 46, make to mix ytterbium from
Sub- transition, thus amplified signal light.The first high power light isolator 42 and the second original text power optoisolator can be effective
Backward spontaneous radiation amplification is controlled, improves quality of output signals, while also functioning to certain protective effect to device.
Further, the Pulse Compression part 56 include collimating mirror 51, diffraction grating to 53,54, reflecting mirror 55 and defeated
Appearance 52, the diffraction grating, for compressing to the high power femtosecond pulse signal of output, are realized narrower to 53,54
The laser pulse signal of pulse exports；After laser signal passes through the collimating mirror 51, by the diffraction grating to 53,54 and described
Reflecting mirror 55 is compressed, then is exported through the outgoing mirror 52.
The utility model has the advantage that one, the utility model passes through one end and described first of the light reflection mirror 1
The reflection input terminal of wavelength division multiplexer 10 is directly connected by the first er-doped gain fibre 2, first wavelength division multiplexer
10 signal output end is connected with the first collimator by one section of short-tail fibre, and erbium doped fiber laser seed is effectively reduced
The chamber of 13 resonant cavity of source is long.Two, the utility model generates the femtosecond pulse of 1550nm wave band using erbium doped fiber laser mode locking
Seed source, avoids using Yb dosed optical fiber the complexity of dispersion compensation when as seed source, and passes through one section of highly nonlinear optical fiber
The 19 simple laser signals for obtaining 1064nm wave band.Three, the utility model erbium doped fiber laser femtosecond seed source use compared with
Short cavity length of the resonator chamber can reduce the quantity of 27 cascaded optical fiber coupler of frequency upgrading part.Four, the utility model is close
Tail optical fiber length difference used is replaced using optical delay line 25 when THz repetition rate, so that THz high repetition frequency femtosecond can be realized
Pulse laser output.Four, the utility model uses the MOPA structure of two-stage pre-amplification part 37 and the main amplifier section 50 of two-stage, can
Preferably control nonlinear interaction realizes the output of high power femtosecond pulse.Five, the component all-fiber of the utility model
Encapsulation and modularization, keep whole system compact-sized, and insertion loss is less, and system reliability is high.
In the above-mentioned THz high repetition frequency high power femto second optical fiber laser 100 based on dispersive wave, swashed using Er-doped fiber
Light device seed source 13 generates the femtosecond pulse signal of higher repetitive frequency, by one section of highly nonlinear optical fiber after this signal is amplified
19 nonlinear frequency conversion, then the multiple stage frequency lift portion 27 being made up of coupler obtain flying for THz high repetition frequency
Then second pulse signal passes through the MOPA of Yb dosed optical fiber pre-amplification part 37 and the main amplifier section 50 of two-stage yb-doped double-clad fiber
The laser signal that the high repetition frequency femtosecond pulse signal of low-power is amplified to tens watts is exported, and carries out chamber to it by structure
Outer Pulse Compression, to obtain the high-power laser signal output of THz high repetition frequency.The mounting structure of this method is simple,
It is easily achieved, it is low in cost, convenient for promoting.
It should be noted that the utility model is not limited to above embodiment, creation essence according to the present utility model
Mind, those skilled in the art can also make other variations, these variations done according to the creative spirit of the utility model, all
Should be included in the utility model it is claimed within the scope of.
Claims (10)
1. a kind of THz high repetition frequency high power femto second optical fiber laser based on dispersive wave, which is characterized in that including er-doped light
Fibre laser seed source, frequency upgrading part, amplifier section and Pulse Compression part；The erbium doped fiber laser seed source
Output end is connect by highly nonlinear optical fiber with the frequency upgrading part, and the output end of the frequency upgrading part is connected to institute
State amplifier section, the amplifier section includes pre-amplification part and the main amplifier section of two-stage, the output end of the amplifier section with
The Pulse Compression part is connected；The laser signal that the erbium doped fiber laser seed source generates is through the highly nonlinear optical fiber
Nonlinear frequency conversion, and by the frequency upgrading part by its frequency upgrading to THz high repetition frequency, the THz high
The laser signal of repetition rate carries out power amplification through the pre-amplification part of the amplifier section and the main amplifier section of two-stage, then passes through
The Pulse Compression part is crossed, the high power femtosecond pulse signal of THz high repetition frequency is exported.
2. the THz high repetition frequency high power femto second optical fiber laser based on dispersive wave, feature exist as described in claim 1
In the erbium doped fiber laser seed source includes laser seed source and Erbium-doped fiber amplifier part, the laser seed
Source includes sequentially connected light reflection mirror, the first er-doped gain fibre, the first wavelength division multiplexer and the first optoisolator；Described
Two input terminals of one wavelength division multiplexer be connected separately with the first er-doped gain fibre and the first mode pump laser device and
The output end of its driving circuit, two output ends of first wavelength division multiplexer be respectively connected to first optoisolator and
The input terminal of one saturable absorber SESAM module.
3. the THz high repetition frequency high power femto second optical fiber laser based on dispersive wave, feature exist as claimed in claim 2
In first wavelength division multiplexer includes sequentially connected first optical fiber collimator, optically filtering piece, polarizing film, Wollaston
Prism and the second optical fiber collimator；The input terminal of first optical fiber collimator is connected to by the first er-doped gain fibre
The light reflection mirror.
4. the THz high repetition frequency high power femto second optical fiber laser based on dispersive wave, feature exist as claimed in claim 2
In, the Erbium-doped fiber amplifier part include the second wavelength division multiplexer, the second mode pump laser device and its driving circuit and the
Two er-doped gain fibres, the input terminal of second wavelength division multiplexer are connected to the output end and second of first optoisolator
The output end of mode pump laser device and its driving circuit, the output end of second wavelength division multiplexer are connected to the second er-doped increasing
Beneficial optical fiber, the Erbium-doped fiber amplifier part are used to be promoted the output power of the erbium doped fiber laser seed source.
5. the THz high repetition frequency high power femto second optical fiber laser based on dispersive wave, feature exist as claimed in claim 4
In the input terminal of the highly nonlinear optical fiber is connected to the second er-doped gain fibre, the output of the highly nonlinear optical fiber
End is connected to the frequency upgrading part, and the highly nonlinear optical fiber is used to carry out non-linear frequency change to the laser signal of input
It changes.
6. the THz high repetition frequency high power femto second optical fiber laser based on dispersive wave, feature exist as described in claim 1
In, the frequency upgrading part includes cascade 50/50 fiber coupler, cascade 50/50 fiber coupler include according to
The one 1 × 2nd 50/50 fiber coupler, multiple 2 × 2 50/50 fiber coupler and the 50/50 of the 21 × 2nd of secondary connection
Fiber coupler is adopted between the described one 1 × 2nd 50/50 fiber coupler and the multiple 2 × 2 50/50 fiber coupler
It is connected with optical fiber, is adopted between the multiple 2 × 2 50/50 fiber coupler and the described 21 × 2nd 50/50 fiber coupler
It is connected with optical delay line；Repetition of the frequency upgrading part using frequency multiplication step by step, for fast lifting input laser signal
Frequency.
7. the THz high repetition frequency high power femto second optical fiber laser based on dispersive wave, feature exist as described in claim 1
In the pre-amplification part includes first order pre-amplification part and second level pre-amplification part, first order pre-amplification part
Including third wavelength division multiplexer, third mode pump laser device and its driving circuit, first mix ytterbium gain fibre and the second light every
From device, the input terminal of the third wavelength division multiplexer is connected to the output end of the frequency upgrading part and third mode pump swashs
Light device and its driving circuit, the third wavelength division multiplexer output end mix ytterbium gain fibre by first and are connected to the second optical isolation
Device；Second level pre-amplification part includes the 4th wavelength division multiplexer, the 4th mode pump laser device and its driving circuit, second
Ytterbium gain fibre and third optoisolator are mixed, the input terminal of the 4th wavelength division multiplexer is connected to first order pre-amplification portion
The output end and the 4th mode pump laser device and its driving circuit divided, the 4th wavelength division multiplexer output end are mixed by second
Ytterbium gain fibre is connected to third optoisolator.
8. the THz high repetition frequency high power femto second optical fiber laser based on dispersive wave, feature exist as claimed in claim 7
In the main amplifier section includes the main amplifier section in the main amplifier section of the first order and the second level, the main amplifier section of the first order
Including (2+1) × 1 combiner device, a pair of of multimode pump laser and its driving circuit, the first Double Cladding Ytterbium Doped Fiber and first
The input terminal of high power light isolator, (2+1) × 1 combiner device is connected to the output end of second level pre-amplification part
It is mixed with the output end of a pair of of multimode pump laser and its driving circuit, (2+1) × 1 combiner device by the first double clad
Ytterbium optical fiber is connected to the first high power light isolator；The main amplifier section in the second level includes (6+1) × 1 combiner device, two groups
Multimode pump laser and its driving circuit, the second Double Cladding Ytterbium Doped Fiber, leakage of pumping device, the second high power light isolator and
End cap, the input terminal of (6+1) × 1 combiner device are connected to the output end and two groups of multimodes of the main amplifier section of the first order
The output end of pump laser and its driving circuit, (6+1) × 1 combiner device passes through the second Double Cladding Ytterbium Doped Fiber successively
It is connected to leakage of pumping device, the second high power light isolator and end cap.
9. the THz high repetition frequency high power femto second optical fiber laser based on dispersive wave, feature exist as claimed in claim 8
In the leakage of pumping device is for filtering out residual pump light；The end cap is for expanding output signal light, to avoid right
Fiber end face causes to damage；The first high power light isolator and the second high power light isolator are for laser signal
One-way transmission.
10. the THz high repetition frequency high power femto second optical fiber laser based on dispersive wave as described in claim 1, feature
It is, the Pulse Compression part includes collimating mirror, diffraction grating to, reflecting mirror and outgoing mirror, and the diffraction grating is to being used for
The high power femtosecond pulse signal of output is compressed, realizes the laser pulse signal output of more burst pulse；Laser letter
Number by being compressed by the diffraction grating to the reflecting mirror, then exported through the outgoing mirror after the collimating mirror.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113314932A (en) * | 2021-06-11 | 2021-08-27 | 中国科学院上海光学精密机械研究所 | 760nm high-stability all-fiber frequency-doubled laser |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113314932A (en) * | 2021-06-11 | 2021-08-27 | 中国科学院上海光学精密机械研究所 | 760nm high-stability all-fiber frequency-doubled laser |
| CN113314932B (en) * | 2021-06-11 | 2024-05-17 | 中国科学院上海光学精密机械研究所 | 760Nm high-stability all-fiber frequency doubling laser |
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