CN107887784B - A kind of nanosecond pulse optical fiber laser - Google Patents
A kind of nanosecond pulse optical fiber laser Download PDFInfo
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- CN107887784B CN107887784B CN201711089617.5A CN201711089617A CN107887784B CN 107887784 B CN107887784 B CN 107887784B CN 201711089617 A CN201711089617 A CN 201711089617A CN 107887784 B CN107887784 B CN 107887784B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4018—Lasers electrically in series
Abstract
The invention belongs to laser technology fields, disclose a kind of nanosecond pulse optical fiber laser, the nanosecond pulse optical fiber laser includes: first order pulse laser generator, second level pulse laser generator, third level pulse laser generator and continuous laser diode, first order pulse laser generator includes laser diode, the output end of the first order pulse laser generator is connected to the input terminal of the second level pulse laser generator, the output end of the second level pulse laser generator and the continuous laser diode are connected to one of input terminal of two input terminals of the third level pulse laser generator, constitute tandem cascade structure.The 1.55 microns of pulse lasers generated using the laser diode can directly generate 3.47 microns of ps pulsed laser and ns pulsed lasers as initial pump source.The nanosecond pulse optical fiber laser has the advantages that low-loss, compact and integrated.
Description
Technical field
The present invention relates to laser technology field more particularly to a kind of nanosecond pulse optical fiber lasers.
Background technique
Middle nanosecond infrared laser has in fields such as nonmetallic materials mark, environmental monitoring, biological detections greatly answers
Use prospect.In recent years, along with the development of laser material, pump technology and optical component, middle nanosecond infrared laser
Performance obtains significant progress.Currently, the method for nanosecond infrared laser mainly includes rare earth ion doped consolidates in generating
Body or optical fiber laser, quantum cascade laser, nonlinear frequency conversion etc..Wherein, optical fiber laser has that structure is simple,
It is compact, the advantages that the optical quality and high conversion efficiency of nearly diffraction limit.Therefore, in recent years, middle nanosecond infrared optical fiber
Laser has won more and more concerns.
In the prior art, the optical maser wavelength directly obtained by middle nanosecond infrared optical fiber laser is limited in 3 microns more
And 3 microns hereinafter, the middle nanosecond infrared laser of more long wavelength has strong application demand multi-field.
Summary of the invention
The main purpose of the present invention is to provide a kind of nanosecond pulse optical fiber lasers, for solving nanosecond in the prior art
The optical maser wavelength that pulse optical fiber directly obtains is limited in 3 microns and 3 microns or less of technical problem more.
To achieve the above object, the present invention provides a kind of nanosecond pulse optical fiber laser, the nanosecond pulse optical-fiber laser
Device includes: first order pulse laser generator, second level pulse laser generator, third level pulse laser generator and continuously swashs
Optical diode includes laser diode in the first order pulse laser generator, the first order pulse laser generator
Output end is connected to the input terminal of the second level pulse laser generator, the output end of the second level pulse laser generator
One of them of two input terminals of the third level pulse laser generator is connected to the continuous laser diode
Input terminal constitutes tandem cascade structure；
The laser diode, for generating 1.55 microns of pulse lasers and defeated from the first order pulse laser generator
Outlet exports the pumping source to the second level pulse laser generator as the second level pulse laser generator；
The second level pulse laser generator, for generating and exporting 1.97 microns of pulse lasers to the third level arteries and veins
Impulse optical generator；
The third level pulse laser generator is used for two pole of 1.97 microns of pulse lasers and the continuous laser
Pumping source after the high power continuous laser coupling of pipe output as the third level pulse laser generator, generates and exports
3.47 micron pulse laser.
It was found from the nanosecond pulse optical fiber laser that aforementioned present invention provides, on the one hand, the nanosecond pulse optical fiber laser
Including three-level pulse laser generator be in tandem cascade structure, therefore, compared with prior art, nanosecond provided by the invention
Pulse optical fiber has the advantages that compact-sized and integrated；On the other hand, three-level pulse laser generator generates respectively
1.55 microns of pulse lasers, 1.97 microns of pulse lasers and 3.47 microns of pulse lasers, realize the optical maser wavelength of pulse laser
Micron again to 3.47 microns of continuous conversion from 1.55 microns to 1.97, therefore, nanosecond pulse optical-fiber laser provided by the invention
Device can not only export pulsed infrared laser in 3.47 microns of typical case, meet multi-field application demand, and only need to be with wherein
1.55 microns of pulse lasers generating of laser diode 3.47 microns of nanosecond arteries and veins can be directly generated as initial pump source
Impulse light, centre are not necessarily to the conversion of external device, and therefore, nanosecond pulse optical fiber laser provided by the invention also has loss low
The advantages of.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those skilled in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of nanosecond pulse optical fiber laser provided in an embodiment of the present invention；
Fig. 2 is the energy diagram that Er provided in an embodiment of the present invention adulterates ZBLAN optical fiber；
Fig. 3 is the pulsewidth of 3.47 microns of pulse lasers provided in an embodiment of the present invention and the change that peak power is delayed at any time
Change curve；
Fig. 4 is the pulsewidth of 3.47 microns of pulse lasers under the conditions of different pumping peak power provided in an embodiment of the present invention
With the change curve of peak power.
Specific embodiment
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, and not all embodiments.Based on the embodiments of the present invention, those skilled in the art
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The present invention proposes a kind of nanosecond pulse optical fiber laser, and the nanosecond pulse optical fiber laser is for generating 3.47 microns
Ps pulsed laser and ns pulsed laser.
Referring to Fig. 1, being a kind of structural schematic diagram of nanosecond pulse optical fiber laser provided in an embodiment of the present invention, this is received
Pulse per second (PPS) optical fiber laser includes:
First order pulse laser generator 1, second level pulse laser generator 2, third level pulse laser generator 3 and company
Continuous laser dual-laser pipe 4, first order pulse laser generator include laser diode 5, first order pulse laser generator 1 it is defeated
Outlet is connected to the input terminal of second level pulse laser generator 2, and the output end of second level pulse laser generator 2 swashs with continuous
Optical diode 4 is connected to one of input terminal of two input terminals of third level pulse laser generator 3, constitutes tandem
Cascade structure, it is compact-sized and integrated that this cascade structure has the advantages that the nanosecond pulse optical fiber laser；
Laser diode 5, for generating 1.55 microns of pulse lasers and defeated from 1 output end of first order pulse laser generator
Pumping source to second level pulse laser generator 2 as second level pulse laser generator 2 out；
Second level pulse laser generator 2, for generating and exporting 1.97 microns of pulse lasers to third level pulse laser
Generator 3；
Third level pulse laser generator 3, the height for exporting 1.97 microns of pulse lasers and continuous laser diode 4
Pumping source after the coupling of power continuous laser as third level pulse laser generator 3 generates and exports 3.47 microns of pulses and swashs
Light.
Wherein, laser diode 5 is for generating 1.55 microns of pulse lasers and from the defeated of first order pulse laser generator 1
Outlet is output to pumping source of the second level pulse laser generator 2 as second level pulse laser generator 2.Second level pulse swashs
Optical generator 2 is generated due to the input of pumping source and is exported 1.97 microns of pulse lasers to third level pulse laser generator 3
In.Third level pulse is inputted after the high power continuous laser coupling that 1.97 microns of pulse lasers and continuous laser diode 4 export
Pumping source of the laser generator 3 as third level pulse laser generator 3 generates and exports 3.47 microns of pulse lasers.This is received
Pulse per second (PPS) optical fiber laser realizes the optical maser wavelength of pulse laser from 1.55 microns to 1.97 micron again to 3.47 microns of company
Continuous conversion, therefore, nanosecond pulse optical fiber laser provided by the invention can not only export infrared pulse in 3.47 microns of typical case
Laser meets multi-field application demand, and the 1.55 microns of pulse lasers that need to be only generated with laser diode therein are made
3.47 microns of ps pulsed laser and ns pulsed laser can be directly generated for initial pump source, centre is not necessarily to the conversion of external device, therefore, this
The nanosecond pulse optical fiber laser that invention provides also has the advantages that loss is low.
It should be noted that pulse laser caused by the nanosecond pulse optical fiber laser is all ps pulsed laser and ns pulsed laser,
3.47 microns of ps pulsed laser and ns pulsed laser belongs to one kind of middle nanosecond infrared laser, and middle nanosecond infrared laser is nonmetallic
There is great application prospect in the fields such as material mark, environmental monitoring, biological detection, therefore 3.47 microns of ps pulsed laser and ns pulsed laser exists
There is very big application prospect in these fields.
Further, as shown in Figure 1, third level pulse laser generator 3 includes that pump light bundling device 6 and Er are adulterated
ZBLAN fibre laser oscillator 7, the output end and continuous laser diode 4 of second level pulse laser generator 2 are separately connected pump
One of input terminal of two input terminals of Pu combiner device 6, pump combiner 6 connect 1.97 microns of pulse lasers and high power
Continuous laser coupled is input to together in Er doping ZBLAN fibre laser oscillator 7, and Er adulterates ZBLAN fibre laser oscillator 7
Generate 3.47 microns of pulse lasers.
Wherein, 1.97 microns of pulse lasers are coupled with high power continuous laser and are input to by pump light bundling device 6
Er adulterates the pumping source in ZBLAN fibre laser oscillator 7 as Er doping ZBLAN fibre laser oscillator 7, Er doping
ZBLAN fibre laser oscillator 7 generates 3.47 microns of pulse lasers, realizes the pulse output of laser.
Further, continuous laser diode 4 is 975 nanometers of high power continuous laser diodes, 975 nanometers of high powers
Continuous laser diode generates 975 nanometers of high power continuous lasers.
Wherein, 975 nanometers of high power continuous lasers and 1.97 microns of pulse lasers are coupled as by pump light bundling device 6
Pumping source is input in Er doping ZBLAN fibre laser oscillator 7,975 nanometers of high power continuous lasers and 1.97 microns of pulses
The time delays (pulse interval of i.e. 1.97 microns pulse lasers) of laser adulterate ZBLAN fibre laser oscillator 7 to Er
Output result have a major impact.
Further, as shown in Figure 1, Er doping ZBLAN fibre laser oscillator 7 includes Er doping ZBLAN optical fiber 8, the
One high reflective mirror 9 and the first output coupling mirror 10, the first high reflective mirror 9 are connected to the input of Er doping ZBLAN fibre laser oscillator 7
End, the first output coupling mirror 10 are connected to the output end of Er doping ZBLAN fibre laser oscillator 7.
Wherein, Er adulterates ZBLAN optical fiber 8 in the mixing of 975 nanometers of high power continuous lasers and 1.97 microns of pulse lasers
Energy level transition occurs under pumping condition, realizes the output of 3.47 microns of pulse lasers.
Specifically, referring to Fig. 2, Fig. 2 is the energy diagram that Er provided in an embodiment of the present invention adulterates ZBLAN optical fiber, in figure
Main energy level transition under the conditions of mixing pumps is marked.Wherein, N1To N7It respectively indicates4I15/2Energy level arrives4F7/2The atom of energy level
Number density.W13Indicate excited absorption probability caused by 975 nanometers of continuous pump lights.W35Indicate that 1.97 microns of pulse pump light are made
At excited absorption probability.W54Indicate by4F9/2Energy level arrives4I9/2The stimulated radiation transfer rate of energy level.W37、W47And W57It is
Excited state absorption probability.As shown in Figure 2, the process for mixing pumping is as follows: 975 nanometers of continuous pump lights store pump energy
In4I11/2Energy level reduces the oscillation threshold of pulse laser with this.At the same time, 1.97 microns of nanosecond pulse pump light excitation
By4I11/2Energy level arrives4F9/2The violent energy level transition of energy level.Finally,4F9/2Exciton in energy level is to low-lying level4I9/2Stimulated radiation
Transition, and generate 3.47 microns of pulse lasers.Due to4I9/2The life time of the level of energy level will be much smaller than4I11/2Energy level, therefore, this
Process can see the gain switch in valid band.
Wherein, during hybrid gain switchs, it is necessary first to which continuous pump light is in the long-life4I11/2Energy level accumulation
Enough atomicities, then, then by the stimulated radiation transition between pulse pump laser excitation energy level.Therefore, 975 nanometers of high powers
The time delays (pulse interval of i.e. 1.97 microns pulse lasers) of continuous laser and 1.97 microns of pulse lasers mix Er
The output result of miscellaneous ZBLAN fibre laser oscillator 7 has a major impact.
Specifically, as shown in figure 3, Fig. 3 is the pulsewidth and peak of 3.47 microns of pulse lasers provided in an embodiment of the present invention
The change curve that value power is delayed at any time.Wherein, the pulsewidth of 1.97 microns of pulse pump light was 300 nanoseconds, and peak power is
0.5kW, from figure 3, it can be seen that stable laser output can be formed when time delays are greater than 140 microseconds.With the increasing of delay
Add, pulse laser becomes increasingly stronger, and then, near general 400 microsecond, optical fiber laser enters saturation state.It is saturated arteries and veins
It is wide in or so 190 nanoseconds, the peak power of corresponding about 93W.
Further, as shown in figure 4, under the conditions of Fig. 4 is different pumping peak power provided in an embodiment of the present invention
The pulsewidth of 3.47 microns of pulse lasers and the change curve of peak power.Wherein, 1.97 microns of pulse pump light and 975 nanometers of companies
The time delays of continuous pump light are 600 microseconds.As it can be seen that when pump light peak power is 0.5kW, the arteries and veins of 3.47 microns of pulse lasers
Width is or so 200 nanoseconds.With gradually increasing for pump light peak power, pulsewidth can constantly narrow, gradually stable in 70 nanoseconds
Near.It is different from pulsewidth, within the scope of the peak power provided, although rate of rise becomes more and more slowly, 3.47 microns of arteries and veins
The peak power of impulse light still can be with the increase sustainable growth of pump light peak power.
Based on above-mentioned as a result, 1.97 microns of pulse lasers of peak power 0.5 to 2kW, Er is adulterated using 300 nanoseconds
The exportable pulsewidth of ZBLAN fibre laser oscillator 7 most short 70 nanosecond, corresponding peak power are more than receiving for 3.47 microns of 0.9kW
Pulse per second (PPS) laser.
Further, as shown in Figure 1, first order pulse laser generator 1 further includes pulse signal generator 11, the first light
Isolator 12 and laser amplifier 13, pulse signal generator 11 are connect with laser diode 5, and pulse signal generator 11 is used for
Control the pulsewidth and repetition rate of 1.55 microns of pulse lasers that laser diode 5 exports, the output end of laser diode 5 and the
The input terminal of one optoisolator 12 connects, and the output end of the first optoisolator 12 is connect with the input terminal of laser amplifier 13, swashs
Image intensifer 13 be used for improve laser diode 5 generation 1.55 microns of pulse lasers peak power, laser amplifier it is defeated
Outlet is the output end of first order pulse laser generator 1.
Wherein, on the one hand, since the nanosecond pulse optical fiber laser is designed using tandem gain switch, 1.55 microns
The pulsewidth and repetition rate of pulse laser have been largely fixed 1.97 microns of arteries and veins of the output of second level pulse laser generator 2
The pulsewidth and repetition rate for 3.47 microns of pulse lasers that impulse light and third level pulse laser generator 3 export.1.55 micro-
The pulsewidth and repetition rate for 1.55 microns of pulse lasers that rice laser diode 5 exports can be direct by pulse signal generator 11
Control.It is designed based on such tandem, it can be by adjusting the pulsewidth and repetition rate of 1.55 microns of pulse lasers, dynamic regulation
Time between the 1.97 microns of pulse pump light and 975 nanometers of continuous pump lights of Er doping ZBLAN fibre laser oscillator 7 prolongs
When, achieve the purpose that 3.47 microns of pulse laser outputs of optimization.On the other hand, due to laser diode 5 directly obtain 1.55
The peak power of micron pulse laser is very limited, need to amplify the peak value of 1.55 microns of pulse lasers by laser amplifier 13
Power.
Further, as shown in Figure 1, second level pulse laser generator 2 includes: the second optoisolator 14 and Tm doping stone
English fibre laser oscillator 15, the input terminal of the second optoisolator 14 are the input terminal of second level pulse laser generator 2, second
The output end of optoisolator 14 is connect with the input terminal of Tm doping silica fibre laser oscillator 15, has improved peak power
Pumping source of 1.55 microns of pulse lasers as Tm doping silica fibre laser oscillator 15, Tm adulterate silica fibre laser generation
Device 15 generates 1.97 microns of pulse lasers.
Further, as shown in Figure 1, Tm doping silica fibre laser oscillator 15 includes Tm doping silica fibre 16, the
Two high reflective mirrors 17 and the second output coupling mirror 18, the second high reflective mirror 17 be connected to Tm doping silica fibre 16 input terminal, second
Output coupling mirror 18 is connected to the output end of Tm doping silica fibre 16, and Tm doping silica fibre laser oscillator 15 is enable to send out
Raw oscillation generates laser.
It should be noted that the setting of the first optoisolator 12 and the second optoisolator 14 is in order to avoid unwanted oscillation
Occur, and when optical maser wavelength is greater than 2.3 microns, the transmission loss of Tm doping silica fibre can steeply rise, thus Tm adulterates stone
Between English fibre laser oscillator 15 and Er doping ZBLAN fibre laser oscillator 7 do not need that optoisolator is added.
Further, the first high reflective mirror 9, the first output coupling mirror 10, the second high reflective mirror 17 and the second output coupling mirror 18
It is optical fiber Bragg Bragg grating, the first high reflective mirror 9, the first output coupling mirror 10, the second high reflective mirror 17 and second of setting
Output coupling mirror 18 is that optical fiber Bragg Bragg grating and is made to make the nanosecond pulse optical fiber laser be easier to prepare
With the first high reflective mirror 9 of optical fiber Bragg Bragg grating, the first output coupling mirror 10, the second high reflective mirror 17 and the second output coupling
The effect for closing mirror 18 is preferable.
Further, laser amplifier 13 is Er/Yb co-doped fiber laser amplifier, which puts
Big device is used to improve the peak power of 1.55 microns of pulse lasers.
Further, Tm adulterates silica fibre laser oscillator 15 and Er adulterates 7 connection side of ZBLAN fibre laser oscillator
Formula is series connection, because Tm doping silica fibre laser oscillator 15 and Er doping ZBLAN fibre laser oscillator 7 are second respectively
The pith of grade pulse laser generator 2 and third level pulse laser generator 3, makes 2 He of second level pulse laser generator
Connection type between third level pulse laser generator 3 is also series connection, second level pulse laser generator 2 and third level pulse
Connection type between laser generator 3 is that series connection is an important factor for three-level pulse laser generator constitutes cascade structure.
From the nanosecond pulse optical fiber laser provided in an embodiment of the present invention of attached drawing 1, on the one hand, the nanosecond pulse optical fiber
The three-level pulse laser generator that laser includes is in tandem cascade structure, and therefore, compared with prior art, the present invention provides
Nanosecond pulse optical fiber laser have the advantages that it is compact-sized and integrated；On the other hand, three-level pulse laser generator point
Not Chan Sheng 1.55 microns of pulse lasers, 1.97 microns of pulse lasers and 3.47 microns of pulse lasers, realize pulse laser swash
Optical wavelength from 1.55 microns to 1.97 micron again to 3.47 microns of continuous conversion, therefore, nanosecond pulse light provided by the invention
Fibre laser can not only export pulsed infrared laser in 3.47 microns of typical case, meet multi-field application demand, and only need
The 1.55 microns of pulse lasers generated using laser diode therein can directly generate 3.47 microns as initial pump source
Ps pulsed laser and ns pulsed laser, centre are not necessarily to the conversion of external device, and therefore, nanosecond pulse optical fiber laser provided by the invention also has
Low advantage is lost.
The above are to a kind of description of nanosecond pulse optical fiber laser provided by the present invention, for those skilled in the art
Member, thought according to an embodiment of the present invention, there will be changes in the specific implementation manner and application range, to sum up, this theory
Bright book content should not be construed as limiting the invention.
Claims (10)
1. a kind of nanosecond pulse optical fiber laser, which is characterized in that the nanosecond pulse optical fiber laser includes: first order pulse
Laser generator, second level pulse laser generator, third level pulse laser generator and continuous laser diode, described first
It include laser diode in grade pulse laser generator, the output end of the first order pulse laser generator is connected to described the
The input terminal of second level pulse laser generator, two pole of output end and the continuous laser of the second level pulse laser generator
Pipe is connected to one of input terminal of two input terminals of the third level pulse laser generator, constitutes tandem grade
It is coupled structure；
The laser diode, for generating 1.55 microns of pulse lasers and from the first order pulse laser generator output end
Export the pumping source to the second level pulse laser generator as the second level pulse laser generator；
The second level pulse laser generator swashs for generating and exporting 1.97 microns of pulse lasers to the third level pulse
Optical generator, the second level pulse laser generator include: Tm doping silica fibre laser oscillator, the Tm doping quartz
Fibre laser oscillator includes Tm doping silica fibre, the second high reflective mirror and the second output coupling mirror；
The third level pulse laser generator, for 1.97 microns of pulse lasers and the continuous laser diode is defeated
Pumping source as the third level pulse laser generator after high power continuous laser coupling out, generates and to export 3.47 micro-
Meter pulse laser, the third level pulse laser generator include Er doping ZBLAN fibre laser oscillator, the Er doping
ZBLAN fibre laser oscillator includes Er doping ZBLAN optical fiber, the first high reflective mirror and the first output coupling mirror.
2. nanosecond pulse optical fiber laser according to claim 1, which is characterized in that the third level pulse laser occurs
Device further includes pump light bundling device；
It is photosynthetic that the output end of the second level pulse laser generator and the continuous laser diode are separately connected the pumping
One of input terminal in two input terminals of beam device, the output end and the Er of the pump light bundling device adulterate ZBLAN light
The input terminal of fine laser oscillator connects, and the pump light bundling device connects 1.97 microns of pulse lasers and the high power
Continuous laser coupled is input to together in the Er doping ZBLAN fibre laser oscillator, and the Er adulterates ZBLAN optical-fiber laser
Oscillator generates 3.47 microns of pulse lasers.
3. nanosecond pulse optical fiber laser according to claim 1 or 2, which is characterized in that the continuous laser diode
For 975 nanometers of high power continuous laser diodes, 975 nanometers of high powers continuous laser diode generates 975 nanometers of Gao Gong
Rate continuous laser.
4. nanosecond pulse optical fiber laser according to claim 2, which is characterized in that first high reflective mirror is connected to institute
The input terminal of Er doping ZBLAN optical fiber is stated, first output coupling mirror is connected to the output of the Er doping ZBLAN optical fiber
End.
5. nanosecond pulse optical fiber laser according to claim 4, which is characterized in that the first order pulse laser occurs
Device further includes pulse signal generator, the first optoisolator and laser amplifier；
The pulse signal generator is connect with the laser diode, and the pulse signal generator is for controlling the laser
The pulsewidth and repetition rate of 1.55 microns of pulse lasers of diode output；
The output end of the laser diode is connect with the input terminal of first optoisolator, first optoisolator it is defeated
Outlet is connect with the input terminal of the laser amplifier, and the laser amplifier is for improving 1.55 microns of pulse lasers
Peak power, the output end of the laser amplifier are the output end of the first order pulse laser generator.
6. nanosecond pulse optical fiber laser according to claim 5, which is characterized in that the second level pulse laser occurs
Device further includes the second optoisolator；
The second optoisolator input terminal is the input terminal of the second level pulse laser generator, second optoisolator
The input terminal of output end and the Tm doping silica fibre laser oscillator connect, improved peak power described 1.55 are micro-
Pumping source of the meter pulse laser as Tm doping silica fibre laser oscillator, the Tm adulterate silica fibre laser generation
Device generates 1.97 microns of pulse lasers.
7. nanosecond pulse optical fiber laser according to claim 6, which is characterized in that second high reflective mirror is connected to institute
The input terminal of Tm doping silica fibre is stated, second output coupling mirror is connected to the output end of the Tm doping silica fibre.
8. nanosecond pulse optical fiber laser according to claim 7, which is characterized in that first high reflective mirror, described
One output coupling mirror, second high reflective mirror and second output coupling mirror are optical fiber Bragg Bragg grating.
9. according to nanosecond pulse optical fiber laser described in claim 5 to 8 any one, which is characterized in that the laser is put
Big device is Er/Yb co-doped fiber laser amplifier.
10. according to nanosecond pulse optical fiber laser described in claim 6 to 8 any one, which is characterized in that the Tm doping
Silica fibre laser oscillator and Er doping ZBLAN fibre laser oscillator connection type are series connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711089617.5A CN107887784B (en) | 2017-11-08 | 2017-11-08 | A kind of nanosecond pulse optical fiber laser |
| PCT/CN2018/071146 WO2019090957A1 (en) | 2017-11-08 | 2018-01-04 | Nanosecond pulsed fiber laser device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711089617.5A CN107887784B (en) | 2017-11-08 | 2017-11-08 | A kind of nanosecond pulse optical fiber laser |
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| CN107887784A CN107887784A (en) | 2018-04-06 |
| CN107887784B true CN107887784B (en) | 2019-08-16 |
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| US5621749A (en) * | 1995-09-06 | 1997-04-15 | Hewlett-Packard Company | Praseodymium-doped fluoride fiber upconversion laser for the generation of blue light |
| KR100744546B1 (en) * | 2005-12-12 | 2007-08-01 | 한국전자통신연구원 | Mid-infrared Raman fiber laser system |
| WO2011009198A1 (en) * | 2009-07-22 | 2011-01-27 | UNIVERSITé LAVAL | All-fiber erbium-doped fluoride fiber laser |
| CN103078243B (en) * | 2013-01-30 | 2016-05-04 | 上海交通大学 | Mix 2 microns of high pulse energy thulium-doped fiber lasers of pumping |
| CN103825164A (en) * | 2013-12-03 | 2014-05-28 | 上海交通大学 | High average power full optical fiber intermediate infrared supercontinuum light source |
| CN104934843B (en) * | 2015-07-14 | 2018-07-31 | 电子科技大学 | The infrared passive Q-adjusted optical fiber laser of high energy in a kind of all-fiber |
| CN105720465B (en) * | 2016-04-20 | 2018-06-19 | 成都瀚辰光翼科技有限责任公司 | A kind of 4 ~ 8 μm of pulse Raman full-optical-fiber lasers |
| CN106374327B (en) * | 2016-08-25 | 2019-05-10 | 电子科技大学 | In infrared multiband all -fiber soft glass laser and obtain laser method |
| CN107275917A (en) * | 2017-08-10 | 2017-10-20 | 电子科技大学 | Infrared super continuum source in ultra wide band all -fiber |
-
2017
- 2017-11-08 CN CN201711089617.5A patent/CN107887784B/en active Active
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2018
- 2018-01-04 WO PCT/CN2018/071146 patent/WO2019090957A1/en active Application Filing
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| CN107887784A (en) | 2018-04-06 |
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