CN205911599U - Q raman laser system is transferred passively to pulse energy adjustable based on bonded crystal - Google Patents
Q raman laser system is transferred passively to pulse energy adjustable based on bonded crystal Download PDFInfo
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- CN205911599U CN205911599U CN201620756386.3U CN201620756386U CN205911599U CN 205911599 U CN205911599 U CN 205911599U CN 201620756386 U CN201620756386 U CN 201620756386U CN 205911599 U CN205911599 U CN 205911599U
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Abstract
The utility model discloses a Q raman laser system is transferred passively to pulse energy adjustable based on bonded crystal, but this system includes pump light source, transmission fiber, optic fibre output interface, coupling lens group, reflecting cavity mirror, output coupling mirror, raman crystal and the bonded crystal of compriseing laser crystal saturable absorber and non -doped crystal. But saturable absorber adopts and can obtain different initial transmissions from last in the position of difference to the slow structure that changes of thickness down, reciprocate or bonded crystal when reciprocating when the pump light source, but laser passes the saturable absorber of different thickness, and the basic frequency laser can be adjusted the pulsed laser for the pulse energy difference to and then realize the output of pulse energy adjustable raman laser through the raman crystal. The utility model has the advantages of can overcome conventional shortcoming of transferring the unable adjustment of the pulse energy of Q system passively to can select the best pulse energy to the raman crystal, realize the output of efficient raman laser.
Description
Technical field
The utility model is related to laser modulation technique and laser frequency technical field, is based on bonded crystals particularly to a kind of
The adjustable passive tune q raman laser system of pulse energy.
Background technology
Raman frequency shift technique is the important means that laser is carried out with wavelength conversion, can expand the wave-length coverage of laser, system
Make more LASER Light Sources being suitable for various applications.At present, raman laser system mainly has continuous output, actively adjust q to export and
Passive tune q exports three kinds of modes.In the continuous way of output, the transient light intensity of Raman light is directly proportional to pumping transient light intensity, and connects
The pump light of continuous working method is not due to being capable of the abundant accumulation of upper energy level ion, its wink as adjusting the q way of output
Shi Guangqiang is generally low.Therefore, in order to ensure effective generation of Raman light, system the plated film of resonator mirror is required very high with
Reduce the round trip loss of fundamental frequency light and Raman light as far as possible.Although continuous way of output structure is more simple, realize difficulty very
Greatly.
And for adjust the q pulse way of output raman laser for, its in the case of not considering fundamental frequency light energy loss,
The Raman gain coefficienct of transient state is directly proportional to pumping pulse energy, and pulse energy is bigger, and its gain coefficient is higher.Actively adjust q side
Formula (including acousto-optic adjusts q and electric light to adjust q mode) is obtained in that the high pulse output of peak power, and the repetition rate of pulse and arteries and veins
Rush width can by q switch be adjusted, but adjust q volume of switch huge, expensive and it needs to external power supply is powered.And
Although passively adjusting q mode to obtain q pulse output by inserting saturable absorber 10 under the mode not needing external power supply,
But the repetition rate of its pulse and pulse width are fixing (being determined according to saturable absorber 10 initial transmission of itself
Fixed), thus the regulation of pulsed energy cannot be realized.In sum, in order to overcome passive tune its pulse energy of q mode cannot adjust
The shortcoming of section, gives full play to its advantage it would be highly desirable to propose a kind of adjustable passive tune q raman laser system of pulse energy.
Utility model content
The purpose of this utility model is to overcome the passive shortcoming adjusting q Raman system cannot realize pulse energy regulation, and
Be devoted to obtaining the output of efficient raman laser by adjusting the pulse energy being suitable for, there is provided a kind of based on bonded crystals
The adjustable passive tune q raman laser system of pulse energy, and provide a kind of saturable absorber by making given shape
And it is moved, and then realize the regulation to pulsed laser energy in passive tune in q system.
The purpose of this utility model is achieved through the following technical solutions:
A kind of adjustable passive tune q raman laser system of the pulse energy based on bonded crystals, including pump light source 1, passes
Lose fine 2, coupled lens group 4, bonded crystals 6, Raman crystal 7 and the laser being made up of reflecting cavity mirror 5 and output coupling mirror 8
Resonator；
Described bonded crystals 6 include laser crystal 9, saturable absorber 10 and non-doped crystal 11, and three has identical
Crystal substrate and be combined together successively；
Described reflecting cavity mirror 5 is be arranged in parallel with described output coupling mirror 8；
Described bonded crystals 6 are located along the same line with described Raman crystal 7, and are vertically installed in described reflecting cavity mirror 5
And described output coupling mirror 8 between；
Pumping laser is produced by described pump light source 1, the optical fiber output via coupled described Transmission Fibers 2 connects
Mouth 3 output, and focus on bonded crystals 6 by described coupled lens group 4 through described reflecting cavity mirror 5, described bonded crystals 6 produce
Raw spontaneous radiation is vibrated back and forth in described reflecting cavity mirror 5 and described output coupling mirror 8, forms the passive basic frequency laser adjusting q, base
Frequency laser iterates through described Raman crystal in the laserresonator that described reflecting cavity mirror 5 and described output coupling mirror 8 are constituted
7, constantly it is converted into raman laser, and finally exported by described output coupling mirror 8.
Further, described pump light source 1 or described bonded crystals 6 are supported to move up and down, and so that pump light is irradiated
To the diverse location of described bonded crystals 6, so that produced basic frequency laser can pass through the described saturable of different-thickness
Absorber 10, and then it is modulated to the tune q pulse of different-energy.
Further, described pump light source 1 is semiconductor light fibre laser, will be coupled into described transmission light after laser output
In fine 2, and exported by optical fiber output interface 3, the output wavelength of described pump light source 1 is according to the one-tenth of pumped laser crvstal
Divide and selected.
Further, described coupled lens group 4 has double-sided coating, enables pump light is carried out anti-reflection.
Further, described reflecting cavity mirror 5 and described output coupling mirror 8 are level crossing or plano-concave mirror, both distances
L1 carry out calculating by abcd matrix principle according to both radius of curvature and the radius of curvature of bonded crystals thermal lens obtain it is ensured that
Described laserresonator can be operated in stability region, that is, meet the condition of | a+d |≤1/2.
Further, described reflecting cavity mirror 5 and described output coupling mirror 8 all carry out optical coating, and described reflecting cavity mirror 5 is right
Pump light is anti-reflection, and its transmissivity is more than 99.9%, and basic frequency laser and raman laser are all-trans, and its reflectivity is more than 99.9%；
Described output coupling mirror 8 is all-trans to basic frequency laser, and its reflectivity is more than 99.9%, is then partly anti-to raman laser
Penetrate.
Further, described laser crystal 9, described saturable absorber 10 and described non-doped crystal 11 are successively by hot key
Conjunction technology is combined together to form described bonded crystals 6；
The both ends of the surface of described bonded crystals 6 carry out plated film it is ensured that described bonded crystals 6 are high to basic frequency laser and raman laser
Thoroughly, its transmissivity is more than 99.9%.
Further, described laser crystal 9 is the crystal of rare earth doped element, and described saturable absorber 10 is chromium-doped
(cr) or vanadium (v) crystal, described non-doped crystal 11 is and described laser crystal 9 and described saturable absorber 10 matrix
Identical crystal.
Further, described Raman crystal 7 is the crystal having Ramam effect, and its both ends of the surface carries out plated film it is ensured that described
Raman crystal 7 is high to basic frequency laser and raman laser thoroughly, and its transmissivity is all higher than 99.9%.
Further, described saturable absorber 10 is the slowly varying structure of thickness from top to bottom, and this structure elects ladder as
Shape, del or right angled triangle.
The utility model has such advantages as with respect to prior art and effect:
1st, the utility model can realize the regulation of the pulsed laser energy to output in the passive laser system adjusting q,
Overcome the shortcoming that passing passive tune q system cannot be carried out adjusting.
2nd, the utility model can select efficiency highest raman laser output institute by the pulse energy of regulating system
Corresponding pulsed laser energy, and then realize the optimization of system.
3rd, the utility model have passive adjust that q raman laser system construction is compact, system stability, cheap etc. prominent excellent
Point, is provided simultaneously with the adjustable peculiar advantage of pulse energy again, can be good at the master that fictitious hosts are expensive, system complex is huge
Dynamic tune q raman laser system.
4th, the utility model optimizes the structure of laser system in the form of three paragraph keys close further, and adopts undoped
Crystal 11 carrys out the saturable absorber 10 larger to heat and radiates, and improves the performance of system.
Brief description
Fig. 1 is that the adjustable passive tune q Raman of a kind of pulse energy based on bonded crystals disclosed in the utility model swashs
The structural representation of photosystem；
Fig. 2 is bonded crystals structure chart in the utility model system；
Fig. 3 is the adoptable structural representation of saturable absorber 10 in the utility model system；
Fig. 4 is the laser resonator structure figure employed in the utility model system；
Fig. 5 be bonded crystals employed in the utility model system and its adjust the signal of the principle of pulse energy
Figure；
Fig. 6 is the output laser spectrum curve map of measurement in the utility model system；
Fig. 7 is the graph of a relation with pump power for the raman laser power of the utility model system output；
Fig. 8 is the schematic diagram of the Raman wavelength of the utility model system output light.
Specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, clear and definite, develop simultaneously enforcement referring to the drawings
Example further describes to the utility model.It should be appreciated that specific embodiment described herein is only in order to explain this reality
With new, it is not used to limit the utility model.
Embodiment one
As shown in figure 1, the adjustable passive tune q raman laser system of a kind of pulse energy based on bonded crystals in the present embodiment
System, this system include pump light source 1, Transmission Fibers 2, optical fiber output interface 3, coupled lens group 4, by reflecting cavity mirror 5 and coupling
The laserresonator of outgoing mirror 8 composition, Raman crystal 7 and by laser crystal 9, saturable absorber 10 and non-doped crystal 11
The bonded crystals 6 of composition；
Described laser crystal 9, described saturable absorber 10 and described non-doped crystal 11 are tied by thermal bonding technology successively
It is combined the described bonded crystals 6 of formation.
Described reflecting cavity mirror 5 is be arranged in parallel with described output coupling mirror 8；
Described bonded crystals 6 are located along the same line with described Raman crystal 7, and are vertically installed in described reflecting cavity mirror 5
It is ensured that the surface that the laser of chamber interior resonance can pass perpendicularly through these devices is propagated and described output coupling mirror 8 between.
After described bonded crystals 6 are located at reflecting cavity mirror 5, before Raman crystal 7.
After described Raman crystal 7 is located at bonded crystals 6, before output coupling mirror 8.
Pumping laser is produced by described pump light source 1, the optical fiber output via coupled described Transmission Fibers 2 connects
Mouth 3 output, and focus on bonded crystals 6 by described coupled lens group 4 through described reflecting cavity mirror 5, described bonded crystals 6 produce
Raw spontaneous radiation is vibrated back and forth in described reflecting cavity mirror 5 and described output coupling mirror 8, forms the passive basic frequency laser adjusting q, base
Frequency laser iterates through described Raman crystal in the laserresonator that described reflecting cavity mirror 5 and described output coupling mirror 8 are constituted
7, constantly it is converted into raman laser, and finally exported by described output coupling mirror 8.
In concrete application, described pump light source 1 or described bonded crystals 6 are supported to move up and down, and so that pump light is shone
It is mapped to the diverse location of described bonded crystals 6, so that produced basic frequency laser can be satisfied through the described of different-thickness
With absorber 10, and then it is modulated to the tune q pulse of different-energy.
In concrete application, described pump light source 1 is semiconductor light fibre laser, will be coupled into described transmission after laser output
In optical fiber 2, and exported by optical fiber output interface 3, the output wavelength of described pump light source 1 is according to pumped laser crvstal
Composition is selected it is desirable to be selected the pumping source with laser crystal absorption bands coupling that it is excited.
In concrete application, need, through coupled lens group 4, to enable to gather from the pump light of optical fiber output interface 3 output
Jiao is on bonded crystals 6.Described coupled lens group 4 double-sided coating, enables pump light is carried out anti-reflection.
In concrete application, described reflecting cavity mirror 5 and described output coupling mirror 8 are level crossing or plano-concave mirror, both away from
Carry out calculating by abcd matrix principle according to both radius of curvature and the radius of curvature of bonded crystals thermal lens from l1 and obtain, protect
Demonstrate,prove described laserresonator and can be operated in stability region, that is, meet the condition of | a+d |≤1/2.
In concrete application, described reflecting cavity mirror 5 and described output coupling mirror 8 all carry out optical coating, described reflecting cavity mirror 5
Anti-reflection to pump light, its transmissivity is more than 99.9%, and basic frequency laser and raman laser are all-trans, and its reflectivity is more than 99.9%；
Described output coupling mirror 8 is all-trans to basic frequency laser, and its reflectivity is more than 99.9%, is then partly anti-to raman laser
Penetrate.
In concrete application, described laser crystal 9, described saturable absorber 10 and described non-doped crystal 11 are successively by warm
Bonding techniques are combined together to form described bonded crystals 6；
The both ends of the surface of described bonded crystals 6 carry out plated film it is ensured that described bonded crystals 6 are high to basic frequency laser and raman laser
Thoroughly, its transmissivity is more than 99.9%.
In concrete application, described laser crystal 9 is the crystal of rare earth doped element, and described saturable absorber 10 is doping
Chromium (cr) or the crystal of vanadium (v), described non-doped crystal 11 is and described laser crystal 9 and described saturable absorber 10 base
Matter identical crystal.
In concrete application, described Raman crystal 7 is the crystal having Ramam effect, and its both ends of the surface carries out plated film it is ensured that institute
State Raman crystal 7 high to basic frequency laser and raman laser thoroughly, its transmissivity is all higher than 99.9%.
In concrete application, described saturable absorber 10 is the slowly varying structure of thickness from top to bottom, can be trapezoidal
12nd, del 13 and right angled triangle 14 etc..
Saturable absorber in bonded crystals 6 adopts these, and slowly varying structure of thickness can be in difference from top to bottom
Position obtain different initial transmissions, when laser travels to and fro between different upper-lower positions, (different initial through different-thickness
Transmitance) saturable absorber, and then the laser pulse of different-energy can be modulated into.
Pulsed laser energy is adjusted based on described laser system and finds the side that Raman exports corresponding optimal laser pulse
Method step is as follows:
S1, selection matrix identical laser crystal, saturable absorber and non-doped crystal；
S2, saturable absorber is processed into the slowly varying shape of upper and lower thickness；
S3, laser crystal, saturable absorber and non-doped crystal are combined together by thermal bonding technical key；
S4, the doping component selection semiconductor laser pumping light source according to laser crystal；
S5, the spot size selection coupled lens group according to pump source fiber output end；
S6, the wavelength of the basic frequency laser being exported according to laser crystal determination；
S7, the output wavelength according to output basic frequency laser, determine larger to its transmissivity, and the stronger crystal of Ramam effect is made
For Raman crystal；
S8, according to laser crystal and Raman crystal, determine the basic frequency laser of output and the wavelength of raman laser；
S9, the wavelength according to basic frequency laser and raman laser, para-linkage crystal and Raman crystal are carried out at optical coating
Reason；
S10, the thermal lens of measurement bonded crystals, and according to parameters such as bonded crystals, the length of Raman crystal, by abcd
Matrix principle selects to reflecting cavity mirror, output coupling mirror, and determines cavity length；
The radius of curvature of s11, the suitable reflecting cavity mirror of selection and output coupling mirror, and select suitable cavity length,
Ensure that laser can operate in stability region, that is, meet the condition of | a+d |≤1/2；
S12, according to basic frequency laser and raman laser wavelength, optical coating is carried out to reflecting cavity mirror and output coupling mirror；
S13, the resonator according to selected bonded crystals, Raman crystal, reflecting cavity mirror, output coupling mirror and determination
Length carries out resonator and builds it is ensured that Laser Transmission direction and bonded crystals, Raman crystal, reflecting cavity mirror and output coupling mirror
Each end face keeps vertical；
S14, open semiconductor laser pumping source, adjust its power output, make laser system exceed operation threshold, output swashs
Light pulse；
S15, regulation pump source fiber out splice going splice move up and down or adjust bonded crystals and move up and down, due to exciting light
It is irradiated to the different position of crystal, the laser that it ejects can pass through the different position of saturable absorber, then due to satisfying
Correspond to different thickness with the diverse location of absorber, when therefore laser passes through different thickness, the tune q pulse that it produces is gathered around
There are different energy, thus can be implemented in pulsed energy in passive tune q system and be adjusted；
S16, basic frequency laser pulse energy are different, and the efficiency that it produces raman laser by Raman crystal is also different.In pump
In the case that Pu luminous power is constant, moves up and down or adjust and move down on bonded crystals by adjusting pump source fiber out splice going splice
Dynamic, the change of the power output of raman laser of measurement output, thus finding the state corresponding to peak power output, thus real
The optimization output of existing raman laser.
Embodiment two
In the present embodiment, a kind of adjustable passive tune q raman laser system of the pulse energy based on bonded crystals is by pump light
Source 1, Transmission Fibers 2, optical fiber output interface 3, coupled lens group 4, reflecting cavity mirror 5, bonded crystals 6, Raman crystal 7 and coupling are defeated
Appearance 8 forms.
Output wavelength semiconductor light fibre laser for 808nm is used as pump light source 1, its output in the implementation case
The core diameter of optical fiber is 100 μm, and maximum power output is 30w.Cooperation 1:5 coupled lens group 4 (respectively by a 50mm and
The convex lens composition of 250mm radius of curvature), coupled lens group 4 focuses on the output light of pump light source 1 on bonded crystals 6.
In the implementation case, reflecting cavity mirror 5 and output coupling mirror 8 are the plano-concave mirror of 300mm all using radius of curvature, and set
The distance (i.e. cavity length) of fixed two mirrors is 85mm.Reflecting cavity mirror 5 high to pump light thoroughly (transmissivity is more than 99.9%), right
Basic frequency laser and raman laser are all-trans (reflectivity is more than 99.9%)；Output coupling mirror 8 is then all-trans to fundamental frequency light, and (reflectivity is more than
99.9%), 85% and 70% two kind are respectively to raman laser reflectivity, as shown in Figure 4.
The implementation case setting bonded crystals 6 are nd:yag/cr:yag/yag form, and total length is 20mm, wherein nd:
The longest edge length of yag crystal is 16mm, doping content 1%；The length of cr:yag crystal is 2mm, and its initial transmission is
95%, it is shaped as the right angle trigonometry body standing upside down；Yag length is 2mm, and three maximum cross section is 4mm*4mm such as Fig. 5 institute
Show, and the implementation case sets Raman crystal 7 for undoped yvo4Crystal, its length is 30mm.Bonded crystals are brilliant with Raman
Body all plates optical thin film so as to the basic frequency laser to 1064nm and 1176nm Raman light are anti-reflection.
It is 10mm that the implementation case arranges bonded crystals 6 front end face with the distance of reflecting cavity mirror 5, and end face is brilliant with Raman thereafter
Body 7 is apart from for 10mm, and Raman crystal 7 rear end face is 15mm with the distance of output coupling mirror 8.Total arrangement is as shown in figure 4, warp
Measurement, when pump power is for 10w, its thermal focal length is 500mm to bonded crystals, therefore, in sum, in laserresonator
Basic mode laser is as shown in Figure 6 in light output direction (z-axis) its hot spot situation of change upper.The beam waist position of whole light beam is located at from anti-
The distance penetrating hysteroscope 5 is 55mm, and that is, in Raman crystal center, this Resonator design is conducive to brilliant in Raman beam waist position
Produce the basic frequency laser of high power density at body, strengthen its Raman delivery efficiency.
The operating mechanism of described system is as follows: after opening pump light source, gradually heightens its power output so that in laser
Increasingly stronger stimulated radiation is produced, stimulated radiation in laser resonance intracavity round trip and constantly increases in crystal 9.Due to exciting light
After mirror coupled lens focus on laser crystal 9, its spot size is only 500 μm, and the excited radiation light size that can produce will not
Exceed the size of pump light, for the cross section of laser crystal 4mm*4mm, only create strong being excited in some position
Radiation, as shown in figure 5, and the saturable that specific thicknesses are all passed through in the stimulated radiation producing in a certain position when coming and going every time is inhaled
Acceptor 10.When stimulated radiation is also weaker, the transmitance of saturable absorber 10 is relatively low, and the threshold value of laser system is very high,
During this, laser crystal 9 is due to inspiring laser not yet, and encouraged by pumping, and laser crystal 9 can accumulate a lot
Upper energy level particle, and when stimulated radiation is sufficiently strong, saturable absorber 10 is transparent to basic frequency laser, and threshold value is quickly
Reduce so that substantial amounts of upper energy level particle transition returns ground state and then sends a laser pulse.Inspire in diverse location and be subject to
Swash radiation, the variable thickness sample of the saturable absorber 10 passing through when it is round, therefore its corresponding threshold value and saturable absorption
The initial transmission of body 10 is different, leads to the time of energy level accumulation particle different, therefore, its energy of the pulse finally exporting
Amount is also just different, as shown in Fig. 5 right figure curve.In sum, after opening pumping, adjusting pumping makes it exceed a certain threshold value
After producing pulse laser output, can be by adjusting moving up and down of pump light or bonded crystals, it is possible to achieve output is swashed
The regulation of optical pulse energy.And the energy due to laser pulse and peak power with the delivery efficiency of raman laser close phase
Close, adjust pump light source 1 or bonded crystals 6 and be possible to obtain optimum raman laser output to a certain ad-hoc location.
After carrying out system fading margin by described method, in the state of optimum, the implementation case system is being respectively adopted
When the rate of mistake is 15% and 30% output coupling mirror 8, the raman laser power of output and the relation of pump power as shown in fig. 7,
The Raman wavelength of its output light is as shown in Figure 8.When pump power is for 12w, it is obtained in that output mean power drawing more than 1w
Graceful laser output.
Above-described embodiment be the utility model preferably embodiment, but embodiment of the present utility model be not subject to above-mentioned
The restriction of embodiment, other any without departing from the change made under Spirit Essence of the present utility model and principle, modify, replace
Generation, combination, simplification, all should be equivalent substitute mode, are included within protection domain of the present utility model.
Claims (10)
1. a kind of adjustable passive tune q raman laser system of the pulse energy based on bonded crystals is it is characterised in that include pumping
Light source (1), Transmission Fibers (2), coupled lens group (4), bonded crystals (6), Raman crystal (7) and by reflecting cavity mirror (5) and
The laserresonator that output coupling mirror (8) forms；
Described bonded crystals (6) include laser crystal (9), saturable absorber (10) and non-doped crystal (11), and three has
Identical crystal substrate is simultaneously combined together successively；
Described reflecting cavity mirror (5) and described output coupling mirror (8) be arranged in parallel；
Described bonded crystals (6) and described Raman crystal (7) are located along the same line, and are vertically installed in described reflecting cavity mirror
(5) and described output coupling mirror (8) between；
Pumping laser is produced by described pump light source (1), the optical fiber output via coupled described Transmission Fibers (2) connects
Mouth (3) output, and focus on bonded crystals (6) by described coupled lens group (4) through described reflecting cavity mirror (5), described key
The spontaneous radiation that synthetic body (6) produces is vibrated back and forth in described reflecting cavity mirror (5) and described output coupling mirror (8), and it is passive to be formed
Adjust the basic frequency laser of q, basic frequency laser is in the laserresonator that described reflecting cavity mirror (5) and described output coupling mirror (8) are constituted
Iterate through described Raman crystal (7), be constantly converted into raman laser, and finally exported by described output coupling mirror (8).
2. the adjustable passive tune q raman laser system of a kind of pulse energy based on bonded crystals according to claim 1,
It is characterized in that,
Described pump light source (1) or described bonded crystals (6) are supported to move up and down, and enable pump light to be irradiated to described bonding
The diverse location of crystal (6), so that produced basic frequency laser can pass through the described saturable absorber of different-thickness
, and then be modulated to the tune q pulse of different-energy (10).
3. the adjustable passive tune q raman laser system of a kind of pulse energy based on bonded crystals according to claim 1,
It is characterized in that,
Described pump light source (1) is semiconductor light fibre laser, will be coupled in described Transmission Fibers (2) after laser output, and
Exported by optical fiber output interface (3), the output wavelength of described pump light source (1) is entered according to the composition of pumped laser crvstal
Row selects.
4. the adjustable passive tune q raman laser system of a kind of pulse energy based on bonded crystals according to claim 1,
It is characterized in that,
Described coupled lens group (4) has double-sided coating, enables pump light is carried out anti-reflection.
5. the adjustable passive tune q raman laser system of a kind of pulse energy based on bonded crystals according to claim 1,
It is characterized in that,
Described reflecting cavity mirror (5) and described output coupling mirror (8) are level crossing or plano-concave mirror, and both is apart from l1 according to both
Radius of curvature and bonded crystals thermal lens radius of curvature by abcd matrix principle carry out calculate obtain it is ensured that described laser is humorous
The chamber that shakes can be operated in stability region, that is, meet the condition of | a+d |≤1/2.
6. the adjustable passive tune q raman laser system of a kind of pulse energy based on bonded crystals according to claim 1,
It is characterized in that,
Described reflecting cavity mirror (5) and described output coupling mirror (8) all carry out optical coating, and described reflecting cavity mirror (5) is to pump light
Anti-reflection, its transmissivity is more than 99.9%, and basic frequency laser and raman laser are all-trans, and its reflectivity is more than 99.9%；
Described output coupling mirror (8) is all-trans to basic frequency laser, and its reflectivity is more than 99.9%, is then partly anti-to raman laser
Penetrate.
7. the adjustable passive tune q raman laser system of a kind of pulse energy based on bonded crystals according to claim 1,
It is characterized in that,
Described laser crystal (9), described saturable absorber (10) and described non-doped crystal (11) are successively by thermal bonding technology
It is combined together to form described bonded crystals (6)；
The both ends of the surface of described bonded crystals (6) carry out plated film it is ensured that described bonded crystals (6) are high to basic frequency laser and raman laser
Thoroughly, its transmissivity is more than 99.9%.
8. the adjustable passive tune q raman laser system of a kind of pulse energy based on bonded crystals according to claim 1,
It is characterized in that,
Described laser crystal (9) is the crystal of rare earth doped element, and described saturable absorber (10) is chromium-doped or vanadium
Crystal, described non-doped crystal (11) is brilliant with described laser crystal (9) and described saturable absorber (10) matrix identical
Body.
9. the adjustable passive tune q raman laser system of a kind of pulse energy based on bonded crystals according to claim 1,
It is characterized in that,
Described Raman crystal (7) is the crystal having Ramam effect, and its both ends of the surface carries out plated film it is ensured that described Raman crystal (7)
High to basic frequency laser and raman laser saturating, its transmissivity is all higher than 99.9%.
10. the adjustable passive tune q raman laser system of a kind of pulse energy based on bonded crystals according to claim 1
System it is characterised in that
Described saturable absorber (10) is the slowly varying structure of thickness from top to bottom, and this structure elects trapezoidal, del as
Or right angled triangle.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058632A (en) * | 2016-07-15 | 2016-10-26 | 暨南大学 | Pulse-energy-adjustable passive Q-switched Raman laser system based on bonding crystals |
| CN110767344A (en) * | 2019-10-21 | 2020-02-07 | 暨南大学 | Light control system and method based on vector light field |
| CN110829176A (en) * | 2019-10-28 | 2020-02-21 | 暨南大学 | Novel solid laser |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058632A (en) * | 2016-07-15 | 2016-10-26 | 暨南大学 | Pulse-energy-adjustable passive Q-switched Raman laser system based on bonding crystals |
| CN110767344A (en) * | 2019-10-21 | 2020-02-07 | 暨南大学 | Light control system and method based on vector light field |
| CN110829176A (en) * | 2019-10-28 | 2020-02-21 | 暨南大学 | Novel solid laser |
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