CN105610043B - The design method and solid laser amplifier of small-signal gain solid laser amplifier - Google Patents
The design method and solid laser amplifier of small-signal gain solid laser amplifier Download PDFInfo
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- CN105610043B CN105610043B CN201610140694.8A CN201610140694A CN105610043B CN 105610043 B CN105610043 B CN 105610043B CN 201610140694 A CN201610140694 A CN 201610140694A CN 105610043 B CN105610043 B CN 105610043B
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- 239000007787 solid Substances 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000005086 pumping Methods 0.000 claims abstract description 100
- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 239000004065 semiconductor Substances 0.000 claims description 11
- 230000003685 thermal hair damage Effects 0.000 claims description 11
- 239000013078 crystal Substances 0.000 claims description 9
- 239000013307 optical fiber Substances 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 230000003321 amplification Effects 0.000 claims description 4
- 230000006378 damage Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000000087 laser glass Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 claims description 2
- 239000000835 fiber Substances 0.000 description 8
- 229910017502 Nd:YVO4 Inorganic materials 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/102—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
- H01S3/1022—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation by controlling the optical pumping
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Abstract
The present invention relates to the design methods and solid laser amplifier of a kind of small-signal gain solid laser amplifier.This method comprises: according to the rate equation of solid laser amplifier, the first pumping radius and the first pumping laser beam quality M2The factor carries out sliding-model control to gain media, obtains small-signal gain, the relational graph of gain media doping concentration and pump power；According to required small-signal gain and the relational graph, obtain and the first pumping radius and the first pump light beam quality M2The corresponding gain media doping concentration of the factor, gain media length and pump power；According to the first pumping radius, the first pumping laser beam quality M2The factor and corresponding gain media doping concentration, gain media length, the small-signal gain solid laser amplifier of pump power design.The present invention provides a kind of design methods of small-signal gain solid laser amplifier, and the solid laser amplifier of required small-signal gain is devised according to this method.
Description
Technical field
The present invention relates to the design methods of laser technology field more particularly to small-signal gain solid laser amplifier and solid
Volumetric laser amplifier.
Background technique
Since laser is born, the attention that laser power and energy are just constantly subjected to people how has been improved.Laser is put
Big device is exactly the emphasis studied both at home and abroad as the main means for improving laser power and energy all the time.In recent years, due to
The convenience that high efficiency, high power and the fiber coupling of semiconductor laser diode (LD) export, LD are increasingly becoming mainstream
Laser pumping source.Due to the advantage that end pumping mode is high-efficient, pattern match is good, Wavelength matched, in recent years in laser generation
It is widely used in terms of device and amplifier.It is past in order to amplify the seed light for inputting laser amplifier to required multiple
Toward needs according to required one practical laser amplifier of gain design.Required gain by amplifier small-signal gain and
The parameter for inputting laser determines.For laser amplifier, a major parameter for measuring its performance is small-signal gain.
It is existing it is a kind of design fiber amplifier method, include how selection certain power pumping LD number and
How correcting algorithm raising spectrum flatness is passed through.The method of another existing design fiber amplifier, including it is based on light
Fine effectively spot size and effective fiber action length setting stimulated Brillouin scattering threshold value and brillouin gain.
However lack the design method of small-signal gain solid laser amplifier in the prior art.
Summary of the invention
The technical problems to be solved by the present invention are: how to provide a kind of design of small-signal gain solid laser amplifier
The problem of method.
In order to solve the above technical problems, one aspect of the present invention proposes a kind of setting for small-signal gain solid laser amplifier
Meter method, this method comprises:
S1: according to the rate equation of solid laser amplifier, the first pumping radius and the first pumping laser beam quality M2
The factor carries out sliding-model control to gain media, obtains small-signal gain, the relationship of gain media doping concentration and pump power
Figure；
S2: if the maximum value of small-signal gain is more than or equal to required small-signal gain in the relational graph, according to institute
The small-signal gain and the relational graph needed obtains and the first pumping radius and the first pump light beam quality M2Factor pair
Gain media doping concentration, gain media length and the pump power answered；
S3: if the maximum value of small-signal gain is less than required small-signal gain in the relational graph, increase pumping function
The first pumping laser beam quality M of rate and/or the first pumping radius of change and/or reduction doping concentration and/or reduction2The factor,
Repeat step S1, S2；
S4: according to the first pumping radius, the first pumping laser beam quality M2The factor and corresponding gain media are mixed
Miscellaneous concentration, gain media length, the small-signal gain solid laser amplifier of pump power design；
Wherein, the first pumping radius that changes includes increasing or reducing the first pumping radius.
Optionally, in the rate equation, the first pumping radius and the first pumping laser according to solid laser amplifier
Beam quality M2The factor, before gain media progress sliding-model control, further includes:
Establish the rate equation of solid laser amplifier.
Optionally, described according to the first pumping radius, the first pumping laser beam quality M2The factor and corresponding
Before gain media doping concentration, gain media length, the small-signal gain solid laser amplifier of pump power design,
Further include:
The size of thermal damage's threshold power of the pump power and gain media is judged, if the pump power is greater than institute
Thermal damage's threshold power is stated, then reduce gain media doping concentration and/or increases the first pumping radius, repetition step S1, S2,
S3.
Optionally, described according to the first pumping radius, the first pumping laser beam quality M2The factor and corresponding
Before gain media doping concentration, gain media length, the small-signal gain solid laser amplifier of pump power design,
Further include:
If what is obtained pumps radius and the first pump light beam quality M with described first2The corresponding gain media of the factor is mixed
Miscellaneous concentration, gain media length and pump power are multiple groups, then long to the multiple groups gain media doping concentration of acquisition, gain media
Degree and pump power are screened, and are obtained and the first pumping radius and the first pump light beam quality M2The factor is corresponding most
Excellent gain media doping concentration, gain media length and pump power.
It is optionally, described that sliding-model control is carried out to gain media, comprising:
Sliding-model control is carried out using microtomy to gain media.
Optionally, the gain media is more than or equal to 80% to the absorption efficiency of pumping laser.
Another aspect of the present invention proposes a kind of solid laser amplifier using the above method, the solid laser amplifier
Include:
Semiconductor laser diode, coupling optical fiber, focusing system, dichroic mirror and gain media；
The semiconductor laser diode is for generating input laser；
The coupling optical fiber is used for the input laser coupled into the focusing system；
The focusing system is used to the input laser carrying out collimation focusing, and by the input laser of collimation focusing through institute
Dichroic mirror is stated to send to the gain media
The gain media carries out power amplification for laser.
Optionally, the shape of the doped region of the gain media is rectangle or ellipse.
Optionally, the solid amplifier is single-pass amplifier.
Optionally, the material of the gain media is laser crystal, laser glass, laser plastic or laser ceramics.
The design method and solid laser amplifier of small-signal gain solid laser amplifier provided by the invention, by obtaining
The relational graph of small-signal gain, gain media doping concentration and pump power is taken, is obtained corresponding with required small-signal gain
First pumping radius, the first pumping laser beam quality M2The factor, gain media doping concentration, gain media length and pumping function
Rate, and devise according to this method the solid laser amplifier of required small-signal gain.
Detailed description of the invention
The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, and attached drawing is schematically without that should manage
Solution is carries out any restrictions to the present invention, in the accompanying drawings:
The process that Fig. 1 shows the design method of the small-signal gain solid laser amplifier of one embodiment of the invention is shown
It is intended to；
Fig. 2 shows the principles of the design method of the small-signal gain solid laser amplifier of one embodiment of the invention
Figure；
Fig. 3 shows the small-signal gain of one embodiment of the invention and the pass of gain media doping concentration, pump power
It is the variation diagram of figure and thermal damage's power with gain media doping concentration；
Fig. 4 shows the structural schematic diagram of the solid laser amplifier of one embodiment of the invention.
Specific embodiment
Below in conjunction with attached drawing, embodiments of the present invention is described in detail.
The process that Fig. 1 shows the design method of the small-signal gain solid laser amplifier of one embodiment of the invention is shown
It is intended to.As shown in Figure 1, the design method of the small-signal gain solid laser amplifier of the embodiment, comprising:
S1: according to the rate equation of solid laser amplifier, the first pumping radius and the first pumping laser beam quality M2
The factor carries out sliding-model control to gain media, obtains small-signal gain, the relationship of gain media doping concentration and pump power
Figure；
S2: if the maximum value of small-signal gain is more than or equal to required small-signal gain in the relational graph, according to institute
The small-signal gain and the relational graph needed obtains and the first pumping radius and the first pump light beam quality M2Factor pair
Gain media doping concentration, gain media length and the pump power answered；
S3: if the maximum value of small-signal gain is less than required small-signal gain in the relational graph, increase pumping function
The first pumping laser beam quality M of rate and/or the first pumping radius of change and/or reduction doping concentration and/or reduction2The factor,
Repeat step S1, S2；
S4: according to the first pumping radius, the first pumping laser beam quality M2The factor and corresponding gain media are mixed
Miscellaneous concentration, gain media length, the small-signal gain solid laser amplifier of pump power design；
Wherein, the first pumping radius that changes includes increasing or reducing the first pumping radius.
It should be noted that pumping laser beam quality is by M2The factor is characterized, by the numerical aperture of coupling optical fiber
(N.A.) it is uniquely determined with the product of coupling fiber radius.
The design method of the small-signal gain solid laser amplifier of the embodiment of the present invention, by obtain small-signal gain,
The relational graph of gain media doping concentration and pump power, acquisition the first pumping radius corresponding with required small-signal gain,
First pumping laser beam quality M2The factor, gain media doping concentration, gain media length and pump power, and according to the party
Method devises the solid laser amplifier of required small-signal gain.
Further, swashed described according to the rate equation, the first pumping radius and the first pumping of solid laser amplifier
Light beam quality M2The factor, before gain media progress sliding-model control, further includes:
Establish the rate equation of solid laser amplifier.
It should be noted that the physical model in rate equation is related with gain media, the corresponding speed of different gains medium
Rate equation form can be different.
In order to avoid there is a situation where hot tearings in the case where pump power is too big for gain crystal in practical application, described
According to the first pumping radius, the first pumping laser beam quality M2The factor and corresponding gain media doping concentration, gain
Medium length, pump power design small-signal gain solid laser amplifier before, further includes:
The size of thermal damage's threshold power of the pump power and gain media is judged, if the pump power is greater than institute
Thermal damage's threshold power is stated, then reduce gain media doping concentration and/or increases the first pumping radius, repetition step S1, S2,
S3。
Since there may be the qualified parameter combinations of multiple groups, described according to the first pumping radius, the first pump
Pu laser beam quality M2The factor and corresponding gain media doping concentration, gain media length, pump power design
Before small-signal gain solid laser amplifier, further includes:
If what is obtained pumps radius and the first pump light beam quality M with described first2The corresponding gain media of the factor is mixed
Miscellaneous concentration, gain media length and pump power are multiple groups, then long to the multiple groups gain media doping concentration of acquisition, gain media
Degree and pump power are screened, and are obtained and the first pumping radius and the first pump light beam quality M2The factor is corresponding most
Excellent gain media doping concentration, gain media length and pump power.
It in practical applications, is that multiple combinations are screened using gain media length and fuel factor as balance foundation
's.
It is further, described that sliding-model control is carried out to gain media, comprising:
Sliding-model control is carried out using microtomy to gain media.
Further, the gain media is more than or equal to 80% to the absorption efficiency of pumping laser.
Particularly, the gain media is 95% to the absorption efficiency of pumping laser, and absorption efficiency refers to 95% for 95%
Incident pump laser absorbed by gain media, and gain media is longer, and absorption efficiency is higher.
Fig. 2 shows the principles of the design method of the small-signal gain solid laser amplifier of one embodiment of the invention
Figure.As shown in Fig. 2, the design method of the small-signal gain solid laser amplifier of the embodiment includes:
Step 1: the small signal of laser amplifier of the semiconductor laser diode end pump of analyzing influence fiber coupling output increases
The factor of benefit, it is selected to establish laser amplifier rate equation according to different physical model features；
Step 2: according to the rate equation set up, giving pumping laser focused radius and pumping laser beam quality M2Cause
Son is calculated gain media discretization using microtomy, available small-signal gain using 95% absorption efficiency as principle
The relational graph changed with gain media doping concentration and pump power；
Step 3: if the maximum value of small-signal gain is more than or equal to required small-signal gain, foundation in the relational graph
The relational graph that required small-signal gain and step 2 obtain selects gain media doping concentration, corresponding gain media length and pump
Pu power；If the maximum value of small-signal gain is not still able to satisfy necessary requirement in relational graph, increases pump power, changes
Radius is pumped, doping concentration is reduced or reduces the M of pumping laser2The factor re-starts step 2；
Step 4: investigate pump power whether be more than gain media thermal damage's threshold power；If pump power is less than increasing
Thermal damage's threshold value of beneficial medium then writes down the gain media doping concentration and corresponding length of each group, pumps radius, pumping laser
Beam quality M2The factor and pump power, as design reference；If pump power is more than thermal damage's threshold power of gain media,
Then reduce gain media doping concentration or increase pumping radius, re-starts step 2；
Step 5: due to there may be the qualified parameter combination of multiple groups, using gain media length and fuel factor as flat
Weighing apparatus foundation screens multiple combinations.After the completion of screening, gain media doping concentration and corresponding length at this time is recorded,
Pump radius, pumping laser beam quality M2The factor and pump power.
It should be noted that influencing the small signal of laser amplifier of the semiconductor laser diode end pump of fiber coupling output
The factor of gain includes: doping concentration, pumping radius and the pumping laser beam quality M of gain media2The factor.
In the case where other conditions are constant, reduce gain media doping concentration and be conducive to increase small-signal gain.
In the case where other conditions are constant, reduce pumping M2The factor is conducive to increase small-signal gain.
In the case where other conditions are constant, changing pumping radius can change small-signal gain, and most there are one
Good pumping radius.
Thermal damage's threshold power of gain media is by gain media self property (material, doping concentration, shape etc.) and pump
Pu radius is related.In the case where other conditions are constant, reduce the heat that gain media doping concentration is conducive to improve gain media
Damage threshold power.In the case where other conditions are constant, increase thermal damage's threshold that pumping radius is conducive to improve gain media
It is worth power.
Fig. 4 shows the structural representation of the solid laser amplifier using above method design of one embodiment of the invention
Figure.As shown in figure 4, the solid laser amplifier of the embodiment includes:
Semiconductor laser diode 1, coupling optical fiber 2, focusing system 4, dichroic mirror 5 and gain media 6；
Semiconductor laser diode 1 is for generating input laser；
Optical fiber 2 is coupled to be used for the input laser coupled into focusing system 4；
Focusing system 4 carries out collimation focusing for that will input laser, and the input laser of collimation focusing is sent through dichroic mirror 5
To gain media 6；
Gain media 6 is used to carry out power amplification to laser.
The working principle of the solid laser amplifier are as follows: the input laser 3 that semiconductor laser diode 1 (abbreviation LD) generates
It is exported by coupling optical fiber 2, the pumping source as gain media 6.The beam quality of laser 3 is inputted by M2The factor is characterized,
It is uniquely determined by the numerical aperture (N.A.) of coupling optical fiber 2 and the product of fiber radius.Focusing system 4, effect is will to input
3 collimation focusing of laser is reached inside gain media 6 by dichroic mirror 5, to realize the mode of seed laser 7 and pumping laser 3
Match.Its focusing capability is determined by focused radius, also known as pumps radius.Gain media 6, under 3 incentive action of pumping laser,
The seed laser 7 of input can be subjected to power amplification.
In a kind of optional embodiment, the shape of the doped region of the gain media is rectangle or ellipse.Institute
It is rodlike for stating gain media.
The solid amplifier is single-pass amplifier.
The material of the gain media is laser crystal, laser glass, laser plastic or laser ceramics.
In practical applications, pump mode is end pumping.
Illustrate the design method of small-signal gain solid laser amplifier with a specific embodiment below.The implementation
The central wavelength of semiconductor laser diode in mode is 808nm, and gain media uses Nd:YVO4Crystal.
Step 1: due to Nd:YVO4Crystal is four-level system, influences energy level population thereon and then influences small signal increasing
Benefit because being known as nonradiative transition, concentration quenching and upconversion etc..It is modeled to obtain the rate equation of laser amplifier:
Wherein, Δ n is inverted population density；WithFor the pumping light intensity of two orthogonal polarization orientations,With
For the Pumping light absorption coefficient of two orthogonal polarization orientations；vpFor pumping light frequency, h is constant；ntIt is close for total Doped ions number
Degree；γ is Energy upconversion coefficient；τspFor spontaneous radiation service life, τnrFor the nonradiative transition service life.
Step 2: according to the rate equation set up, giving pumping laser focused radius is 215 μm.Pump the output light of LD
Fine diameter is 100 μm, numerical aperture 0.22, then pumping laser beam quality M2The factor is 43.5.It is with 95% absorption efficiency
Principle is calculated gain media discretization using microtomy, and available small-signal gain is dense as gain media adulterates
The relational graph of degree and pump power variation, as shown in Figure 3.
Step 3: it is assumed that required small-signal gain is 30dB, and the maximum value of small-signal gain is 44dB in Fig. 3, is existed
The amplifier parameter combination of small-signal gain needed for multiple groups meet.Select gain media doping concentration for 0.3%, corresponding gain
Medium length 9mm is and pump power is 60W, and obtaining corresponding small-signal gain is 30dB.
Step 4: being 215 μm and pumping laser beam quality M in pumping radius2In the case that the factor is 43.5, obtain
0.3% doping Nd:YVO4Thermal damage's threshold value of crystal is about 40W, is less than 60W and answers so the combination that step 3 obtains is infeasible
Replacement combination.Select that gain media doping concentration for 0.2%, corresponding gain media length 15mm is and pump power is
40W.And 0.2% doping Nd:YVO4Thermal damage's threshold value of crystal is about 60W, is greater than pump power 40W, meets condition.
Step 5: since there may be the qualified parameter combination of multiple groups, the 0.1% doping Nd:YVO of such as a length of 30mm4
Crystal its small-signal gain under the pump power of 30W is 30dB, using gain media length and fuel factor as balance according to right
Multiple combinations are screened.After the completion of screening, the gain media doping concentration recorded at this time is 0.2%, length 15mm, pump
Pu power is 40W, and pumping radius is 215 μm.
The design method and solid laser amplifier of small-signal gain solid laser amplifier provided by the invention, by obtaining
The relational graph of small-signal gain, gain media doping concentration and pump power is taken, is obtained corresponding with required small-signal gain
First pumping radius, the first pumping laser beam quality M2The factor, gain media doping concentration, gain media length and pumping function
Rate, and devise according to this method the solid laser amplifier of required small-signal gain.
Although the embodiments of the invention are described in conjunction with the attached drawings, but those skilled in the art can not depart from this hair
Various modifications and variations are made in the case where bright spirit and scope, such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (10)
1. a kind of design method of small-signal gain solid laser amplifier characterized by comprising
S1: according to the rate equation of solid laser amplifier, the first pumping radius and the first pumping laser beam quality M2The factor,
Sliding-model control is carried out to gain media, obtains small-signal gain, the relational graph of gain media doping concentration and pump power；
S2: if the maximum value of small-signal gain is more than or equal to required small-signal gain in the relational graph, according to required
Small-signal gain and the relational graph obtain and the first pumping radius and the first pumping laser beam quality M2Factor pair is answered
Gain media doping concentration, gain media length and pump power；
S3: if in the relational graph small-signal gain maximum value be less than required small-signal gain, increase pump power and/
Or changes the first pumping radius and/or reduce gain media doping concentration and/or reduce the first pumping laser beam quality M2Cause
Son repeats step S1, S2；
S4: according to the first pumping radius, the first pumping laser beam quality M2The factor and the doping of corresponding gain media are dense
Degree, gain media length, the small-signal gain solid laser amplifier of pump power design；
Wherein, the first pumping radius that changes includes increasing or reducing the first pumping radius.
2. the design method of small-signal gain solid laser amplifier according to claim 1, which is characterized in that described
According to the rate equation of solid laser amplifier, the first pumping radius and the first pumping laser beam quality M2The factor, to gain
Medium carries out before sliding-model control, further includes:
Establish the rate equation of solid laser amplifier.
3. the design method of small-signal gain solid laser amplifier according to claim 1, which is characterized in that described
According to the first pumping radius, the first pumping laser beam quality M2The factor and corresponding gain media doping concentration, gain
Medium length, pump power design small-signal gain solid laser amplifier before, further includes:
The size of thermal damage's threshold power of the pump power and gain media is judged, if the pump power is greater than the heat
Damage threshold power then reduces gain media doping concentration and/or increases the first pumping radius, repeats step S1, S2, S3.
4. the design method of small-signal gain solid laser amplifier according to claim 1, which is characterized in that described
According to the first pumping radius, the first pumping laser beam quality M2The factor and corresponding gain media doping concentration, gain
Medium length, pump power design small-signal gain solid laser amplifier before, further includes:
If what is obtained pumps radius and the first pumping laser beam quality M with described first2The corresponding gain media doping of the factor is dense
Degree, gain media length and pump power are multiple groups, then to the multiple groups gain media doping concentration of acquisition, gain media length and
Pump power is screened, and is obtained and the first pumping radius and the first pumping laser beam quality M2The factor is corresponding optimal
Gain media doping concentration, gain media length and pump power.
5. the design method of small-signal gain solid laser amplifier according to claim 1, which is characterized in that described right
Gain media carries out sliding-model control, comprising:
Sliding-model control is carried out using microtomy to gain media.
6. the design method of small-signal gain solid laser amplifier according to claim 1, which is characterized in that the increasing
Beneficial medium is more than or equal to 80% to the absorption efficiency of pumping laser.
7. a kind of solid laser amplifier using method described in any one of claims 1-6 characterized by comprising
Semiconductor laser diode, coupling optical fiber, focusing system, dichroic mirror and gain media；
The semiconductor laser diode is for generating input laser；
The coupling optical fiber is used for the input laser coupled into the focusing system；
The focusing system is used to carry out the input laser collimation focusing, and by the input laser of collimation focusing through described double
Look mirror is sent to the gain media；
The gain media is used to carry out power amplification to laser.
8. solid laser amplifier according to claim 7, which is characterized in that the shape of the doped region of the gain media
Shape is rectangle or ellipse.
9. solid laser amplifier according to claim 7, which is characterized in that the solid laser amplifier is put for one way
Big device.
10. solid laser amplifier according to claim 7, which is characterized in that the material of the gain media is laser
Crystal, laser glass, laser plastic or laser ceramics.
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| CN105305207A (en) * | 2014-11-25 | 2016-02-03 | 北京国科世纪激光技术有限公司 | End-pumped single-pass traveling wave laser amplifier |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305207A (en) * | 2014-11-25 | 2016-02-03 | 北京国科世纪激光技术有限公司 | End-pumped single-pass traveling wave laser amplifier |
Non-Patent Citations (1)
| Title |
|---|
| LD泵浦掺铥(Tm3+)光纤激光器的数值分析;黎大军等;《应用光学》;20070731;第28卷(第4期);第440页1、速率方程,第441页2.结果与分析,第443-444页3.结束语、图5 |
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