CN206595543U - A kind of inner chamber Raman Yellow light laser of bicrystal composite gain - Google Patents
A kind of inner chamber Raman Yellow light laser of bicrystal composite gain Download PDFInfo
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- CN206595543U CN206595543U CN201720128183.4U CN201720128183U CN206595543U CN 206595543 U CN206595543 U CN 206595543U CN 201720128183 U CN201720128183 U CN 201720128183U CN 206595543 U CN206595543 U CN 206595543U
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Abstract
The utility model discloses a kind of inner chamber Raman Yellow light laser of bicrystal composite gain, including：Laser diode pumping source sends 808nm pump lights, respectively by the Nd of coaxial placement:YAG crystal and Nd:YVO4Crystal respectively absorbs a part, and two pieces of crystal provide laser gain simultaneously, and 1.06 μm of basic frequency laser polarization state polarizes for π, is vibrated in the resonator that total reflective mirror and gold-tinted outgoing mirror are constituted；Basic frequency laser passes through Nd:YVO4Crystal obtains Raman gain, and 1.18 μm of stokes lights are produced more than vibration after stimulated Raman scattering threshold value；1.18 μm of stokes lights produce 588nm gold-tinteds through the frequency-doubling crystal frequency multiplication, are exported through the outgoing mirror.The utility model ensures laser polarization by bicrystal composite gain, it is possible to increase shg efficiency；Nd can be made full use of:The high advantage of YAG crystal thermal fracture threshold values, applies higher pump power, so as to improve gold-tinted power output.
Description
Technical field
The utility model is related to the Ramar laser field in laser technology field, more particularly to a kind of twin crystal bluk recombination increases
The inner chamber Raman Yellow light laser of benefit.
Background technology
Inner cavity frequency-doubling Ramar laser is the important technology approach for obtaining gold-tinted output, that is, passes through stimulated Raman scattering
(SRS) the efficient 1.06 μm of laser of Nd laser working mediums will be mixed and be converted to 1.18 μm of single order stokes lights, then carried out again
Frequently, the gold-tinted output near wavelength 588nm is produced.
Neodymium-doped yttrium-aluminum garnet (Nd is used the inner cavity frequency-doubling Ramar laser of early stage more:YAG) as gain medium,
Because the laser of its generation is non-polarized light, single order stokes light does not have polarizability equally, and inner cavity frequency-doubling process needs to use
The crystal such as KTP (KTP) realize II type-Ⅱphase matchings, exist and the unfavorable factor such as walk off, limit gold-tinted power output and
Conversion efficiency, while also have impact on beam quality.
Some gain mediums, such as Nd-doped yttrium vanadate (Nd:YVO4), neodymium-doped gadolinium vanadate (Nd:GdVO4) and neodymium-doped tungstic acid
Potassium gadolinium (Nd:) etc. KGW there is stronger Raman gain, therefore Laser emission and SRS two can be realized simultaneously in one piece of crystal
Individual process, i.e., from Ramar laser.Particularly vanadate crystal, laser stimulated emission cross section and Raman gain coefficienct all compare
Greatly, it is even more important that the output of its laser has linear polarization characteristic, the crystal I such as three lithium borates (LBO) type-Ⅱphase matchings times are passed through
Frequently, the high conversion efficiency of gold-tinted output is produced, and beam quality is more preferable.But, from Ramar laser, Laser emission and SRS
The thermal accumlation that two processes are produced is in same crystal, and fuel factor is even more serious, influence Laser emission and SRS conversion effect
Rate, even Crystal Breakup is caused when serious.
To solve the above problems, improving the power output and conversion efficiency of inner cavity frequency-doubling Raman Yellow light laser, this practicality
A kind of new Nd of proposition:YAG/Nd:YVO4The Raman Yellow light laser of composite gain.
Utility model content
The utility model provides a kind of inner chamber Raman Yellow light laser of bicrystal composite gain, and the utility model is used
Coaxial Nd:YAG and Nd:YVO4Crystal provides laser gain simultaneously, the pump power upper limit is improved, while utilizing Nd:YVO4Laser
Polarization characteristic ensure that the single order stokes light produced through SRS is linear polarization, so as to use lbo crystal I type-Ⅱphase matchings
Frequency multiplication produces gold-tinted, improves shg efficiency, final to realize the beneficial effect for improving gold-tinted power output and conversion efficiency, refers to down
Text description：
A kind of inner chamber Raman Yellow light laser of bicrystal composite gain, including：Laser diode pumping source, biography can light
Fibre, coupled lens group, total reflective mirror, Nd:YAG crystal, Nd:YVO4Crystal, frequency-doubling crystal, gold-tinted outgoing mirror,
The laser diode pumping source sends 808nm pump lights, respectively by the Nd of coaxial placement:YAG crystal and Nd:
YVO4Crystal respectively absorbs a part, and two pieces of crystal provide laser gain simultaneously, and 1.06 μm of basic frequency laser polarization state polarizes for π,
Vibrated in the resonator that the total reflective mirror and the gold-tinted outgoing mirror are constituted；
Basic frequency laser passes through the Nd:YVO4Crystal obtains Raman gain, is produced more than being vibrated after stimulated Raman scattering threshold value
Raw 1.18 μm of stokes lights；1.18 μm of stokes lights produce 588nm gold-tinteds, through the Huang through the frequency-doubling crystal frequency multiplication
Light output mirror is exported.
Wherein, the two-sided plating pump light anti-reflection film of the coupled lens group.The total reflective mirror plating pump light is anti-reflection, basic frequency laser
With stokes light high reflectivity film stack.
Wherein, the Nd:YAG crystal and the Nd:YVO4The equal two ends plating pump light of crystal, basic frequency laser, Stokes
Light anti-reflection film.The frequency-doubling crystal two ends plating basic frequency laser, stokes light and frequency doubling yellow anti-reflection film.The gold-tinted outgoing mirror
Plate high anti-, the frequency doubling yellow anti-reflection film system of basic frequency laser, stokes light.
The Raman Yellow light laser also includes：Q-switch, the Q-switch two ends plating basic frequency laser and stokes light increase
Permeable membrane.
The Raman Yellow light laser also includes：Harmonic wave mirror, the two-sided plating basic frequency laser of harmonic wave mirror and stokes light
Anti-reflection film, simultaneously plates frequency doubling yellow high-reflecting film, for collecting the frequency doubling yellow of reverse transfer.
The beneficial effect of technical scheme that the utility model is provided is：The utility model utilizes Nd:YAG/Nd:YVO4Twin crystal
Body provides laser gain simultaneously, it is ensured that the polarizability of basic frequency laser, so as to use I type-Ⅱphase matching mode frequencys multiplication, improves and turns
Change efficiency and beam quality；On the other hand, due to Nd:YAG crystal and Nd:YVO4Crystal absorbs part pump light respectively, and heat is negative
Carry by the two shared, Nd can be made full use of:The high advantage of YAG crystal thermal fracture threshold values, applies higher pump power, from
And improve gold-tinted power output.
Brief description of the drawings
A kind of structural representation of the inner chamber Raman Yellow light laser for bicrystal composite gain that Fig. 1 provides for the utility model
Figure.
In accompanying drawing, the list of parts representated by each label is as follows：
1：808nm laser diode pumping sources； 2：Energy-transmission optic fibre；
3：Coupled lens group； 4：Total reflective mirror；
5：Nd:YAG crystal； 6：Nd:YVO4Crystal；
7：Q-switch； 8：Harmonic wave mirror；
9：Frequency-doubling crystal； 10：Gold-tinted outgoing mirror.
Embodiment
To make the purpose of this utility model, technical scheme and advantage clearer, below to the utility model embodiment
It is described in further detail.
Embodiment 1
The utility model embodiment provides a kind of inner chamber Raman Yellow light laser of bicrystal composite gain, referring to Fig. 1,
During the utility model is implemented, except Nd:YAG crystal 5 as gain medium outside, be used as the Nd of raman gain medium:YVO4It is brilliant
Body 6 also provides fractionated gain to 1.06 μm of laser simultaneously so that fundamental frequency light and stokes light have the inclined characteristic of line, and the Raman is yellow
The design principle of light laser is as described below：
Laser diode pumping source sends pump light, respectively by the Nd of coaxial placement:YAG crystal 5 and Nd:YVO4Crystal 6
Each to absorb a part, two pieces of crystal provide laser gain simultaneously, due to Nd:The gain phase on two polarization directions of YAG crystal 5
Together, Nd:YVO4Gain of the crystal 6 on π polarization directions is much larger than σ polarization directions, thus the laser gain of generally π polarizations
Higher, in the presence of mode competition, final 1.06 μm of basic frequency laser polarization state polarizes for π, is exported in total reflective mirror and gold-tinted
Vibrated in the resonator that mirror is constituted；Basic frequency laser passes through Nd:YVO4Crystal 6 obtains Raman gain, is produced more than being vibrated after SRS threshold values
Raw 1.18 μm of stokes lights；1.18 μm of stokes lights produce 588nm gold-tinteds, through outgoing mirror through the frequency-doubling crystal frequency multiplication
Output.Ensure laser polarization by bicrystal composite gain, it is possible to increase shg efficiency；In addition, heat load is by two pieces of crystal
Shared, can make full use of Nd:The high advantage of the thermal fracture threshold value of YAG crystal 5, applies higher pump power, so as to improve
Gold-tinted power output.
Plate anti-reflection pump light, basic frequency laser and stokes light high reflectivity film stack, other end plating base in gain medium one end
Frequency laser anti-reflection film；The two-sided plating pump light anti-reflection film of focus lens group；Total reflective mirror plates anti-reflection pump light, basic frequency laser and stoke
This light high reflectivity film stack；Nd:YAG crystal 5 and Nd:YVO4Pump light, basic frequency laser are plated in the equal two ends of crystal 6, stokes light is anti-reflection
Film；Frequency-doubling crystal two ends plating basic frequency laser, stokes light and frequency doubling yellow anti-reflection film；Gold-tinted outgoing mirror plating basic frequency laser, this
High anti-, the frequency doubling yellow anti-reflection film system of lentor light；
Pass through above-mentioned setting, it is ensured that the polarizability of laser, so as to I type-Ⅱphase matching frequencys multiplication, improve conversion effect
Rate and beam quality；Meanwhile, heat load is shared by two pieces of crystal, can mitigate the influence of fuel factor, it is to avoid the danger of thermal fracture, is applied
Jia Genggao pumping is to improve power output.
Embodiment 2
With reference to Fig. 1, the scheme in embodiment 1 is further introduced, referring to Fig. 1, the twin crystal bluk recombination increases
The inner chamber Raman Yellow light laser of benefit includes：Laser diode pumping source 1, energy-transmission optic fibre 2, coupled lens group 3, total reflective mirror 4,
Nd:YAG crystal 5, Nd:YVO4Crystal 6, frequency-doubling crystal 9, gold-tinted outgoing mirror 10, wherein,
Coupled lens group 3 plates 808nm anti-reflection films；The plating of total reflective mirror 4 808nm is anti-reflection, 1064nm and 1176nm high-reflecting films；Nd:
YAG crystal 5 and Nd:YVO4Crystal 6 plates 808nm, 1064nm, 1176nm anti-reflection film；Frequency-doubling crystal 9 plates 1064nm, 1176nm
Anti-reflection film；High anti-, the 588nm anti-reflection films of the plating of gold-tinted outgoing mirror 10 1064nm, 1176nm；
Laser diode pumping source 1 launches 808nm pump lights, is exported by energy-transmission optic fibre 2, then by coupled lens group 3
Pumped laser crvstal after focusing, part pump light is by Nd:YAG crystal 5 absorbs, and remainder is by Nd:YVO4Crystal 6 absorbs, by
In Nd:YVO4The π polarization directions laser gain of crystal 6 is higher, and the total gain of 1064nm basic frequency lasers is still that this side up more
Height, therefore the fundamental frequency light of linear polarization can be formed, vibrated in the resonator that total reflective mirror 4 and gold-tinted outgoing mirror 10 are constituted；Linear polarization
1064nm laser pass through Nd:YVO4During crystal 6, Raman gain is obtained, when gain is lost more than SRS, linear polarization is just produced
1176nm single order stokes lights, vibrate in the resonator that total reflective mirror 4 and gold-tinted outgoing mirror 10 are constituted；Intracavitary vibration
1176nm stokes lights produce 588nm gold-tinteds, exported through gold-tinted outgoing mirror 10 through frequency-doubling crystal frequency multiplication.
Wherein, frequency-doubling crystal 9 can be lbo crystal or barium metaborate (BBO), it is bismuth borate (BIBO), period polarized
The nonlinear crystals such as lithium tantalate (PPLT), phase matched mode can be that angular phase matching or temperature phase are matched,
As long as there is the matching of I classes at 1176nm frequencys multiplication；
Wherein, the pulse to realize laser is operated, the Raman Yellow light laser in the utility model embodiment, in addition to：Q
Switch 7, the two ends of Q-switch 7 are coated with 1064nm, 1176nm anti-reflection film, and the pulse for realizing laser by Q-switch is operated, and improves laser
Peak power, and then SRS and shg efficiency are improved, Q-switch can be acousto-optic Q-switching, electro-optical Q-switch and passive Q-switch, sheet
Utility model embodiment is without limitation.
Wherein, it is raising gold-tinted power output, the Raman Yellow light laser in the utility model embodiment, in addition to：It is humorous
Wave plate 8, two-sided plating 1064nm, 1176nm anti-reflection film of harmonic wave piece 8, one side plating 588nm high-reflecting films cause reverse biography by harmonic wave piece
Defeated 588nm gold-tinteds can be exported through outgoing mirror 10.
In summary, the utility model embodiment provides a kind of inner chamber Raman gold-tinted laser of bicrystal composite gain
Device, utilizes Nd:YAG/Nd:YVO4Bicrystal provides basic frequency laser gain simultaneously, it is ensured that the polarizability of laser, so as to use
I type-Ⅱphase matching mode frequencys multiplication, improve conversion efficiency and beam quality；On the other hand, due to Nd:YAG crystal and Nd:YVO4It is brilliant
Body absorbs part pump light respectively, and heat load can make full use of Nd by the two shared:YAG crystal thermal fracture threshold values are high
Advantage, applies higher pump power, so as to improve gold-tinted power output.
The utility model embodiment is to the model of each device in addition to specified otherwise is done, and the model of other devices is not limited
System, as long as the device of above-mentioned functions can be completed.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, above-mentioned the utility model is real
Apply that a sequence number is for illustration only, the quality of embodiment is not represented.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in guarantor of the present utility model
Within the scope of shield.
Claims (8)
1. a kind of inner chamber Raman Yellow light laser of bicrystal composite gain, it is characterised in that including：It is laser diode-pumped
Source, energy-transmission optic fibre, coupled lens group, total reflective mirror, Nd:YAG crystal, Nd:YVO4Crystal, frequency-doubling crystal, gold-tinted outgoing mirror,
The laser diode pumping source sends 808nm pump lights, respectively by the Nd of coaxial placement:YAG crystal and Nd:YVO4It is brilliant
Body respectively absorbs a part, and two pieces of crystal provide laser gain simultaneously；
1.06 μm of basic frequency laser polarization state polarizes for π, in the resonator that the total reflective mirror and the gold-tinted outgoing mirror are constituted
Vibration；
Basic frequency laser passes through the Nd:YVO4Crystal obtains Raman gain, and 1.18 are produced more than vibration after stimulated Raman scattering threshold value
μm stokes light；1.18 μm of stokes lights produce 588nm gold-tinteds through the frequency-doubling crystal frequency multiplication, are exported through the gold-tinted
Mirror is exported.
2. a kind of inner chamber Raman Yellow light laser of bicrystal composite gain according to claim 1, it is characterised in that institute
State the two-sided plating pump light anti-reflection film of coupled lens group.
3. a kind of inner chamber Raman Yellow light laser of bicrystal composite gain according to claim 1, it is characterised in that institute
State anti-reflection total reflective mirror plating pump light, basic frequency laser and stokes light high reflectivity film stack.
4. a kind of inner chamber Raman Yellow light laser of bicrystal composite gain according to claim 1, it is characterised in that institute
State Nd:YAG crystal and the Nd:YVO4The equal two ends plating pump light of crystal, basic frequency laser, stokes light anti-reflection film.
5. a kind of inner chamber Raman Yellow light laser of bicrystal composite gain according to claim 1, it is characterised in that institute
State frequency-doubling crystal two ends plating basic frequency laser, stokes light and frequency doubling yellow anti-reflection film.
6. a kind of inner chamber Raman Yellow light laser of bicrystal composite gain according to claim 1, it is characterised in that institute
State gold-tinted outgoing mirror plating basic frequency laser, high anti-, the frequency doubling yellow anti-reflection film system of stokes light.
7. a kind of inner chamber Raman Yellow light laser of bicrystal composite gain according to claim 1, it is characterised in that institute
Stating Raman Yellow light laser also includes：Q-switch,
The Q-switch two ends plating basic frequency laser and stokes light anti-reflection film.
8. a kind of inner chamber Raman Yellow light laser of bicrystal composite gain according to claim 1, it is characterised in that institute
Stating Raman Yellow light laser also includes：Harmonic wave mirror,
The two-sided plating basic frequency laser of harmonic wave mirror and stokes light anti-reflection film, simultaneously plate frequency doubling yellow high-reflecting film, for collecting
The frequency doubling yellow of reverse transfer.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111900606A (en) * | 2020-07-24 | 2020-11-06 | 山东省科学院激光研究所 | High-power high-energy yellow Raman laser system |
| CN113346349A (en) * | 2021-05-31 | 2021-09-03 | 中国科学院上海光学精密机械研究所 | High repetition frequency intracavity frequency doubling pulse Raman laser |
-
2017
- 2017-02-13 CN CN201720128183.4U patent/CN206595543U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111900606A (en) * | 2020-07-24 | 2020-11-06 | 山东省科学院激光研究所 | High-power high-energy yellow Raman laser system |
| CN113346349A (en) * | 2021-05-31 | 2021-09-03 | 中国科学院上海光学精密机械研究所 | High repetition frequency intracavity frequency doubling pulse Raman laser |
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Granted publication date: 20171027 Termination date: 20200213 |