CN2747754Y - Internal cavity frequency doubling laser of laser diode pump - Google Patents
Internal cavity frequency doubling laser of laser diode pump Download PDFInfo
- Publication number
- CN2747754Y CN2747754Y CN 200420075268 CN200420075268U CN2747754Y CN 2747754 Y CN2747754 Y CN 2747754Y CN 200420075268 CN200420075268 CN 200420075268 CN 200420075268 U CN200420075268 U CN 200420075268U CN 2747754 Y CN2747754 Y CN 2747754Y
- Authority
- CN
- China
- Prior art keywords
- light
- laser
- frequency
- mirror
- convex lens
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Lasers (AREA)
Abstract
The utility model relates to the internal cavity frequency doubling laser of the laser diode pump, comprising a pumping source, an optical coupling system, a thermal stable resonant cavity composed of a completely inverse mirror, an output mirror, and a lens which inserts into the output mirror, and the utility model is also composed of a laser medium and a double frequency crystal which are positioned in the cavity. The utility model is characterized in that the completely inverse mirror and the output mirror are flat mirrors; the lens is a convex lens; the laser medium which is arranged between the completely inverse mirror and the convex lens is positioned at a girdling point of the oscillate light, and the double frequency crystal which is arranged between the convex lens and the output mirror is positioned at another girdling point of the oscillate light. The thermal stable resonant cavity composed of the two flat mirrors and one convex lens of the utility model can efficiently overcome the 'green light problems'(that is to say the unstable problem of the power of the double-frequency light) of the thermal lens effect, and the frequency doubling laser with different focal distances generated by different pumping power within the large variable range, and the unmatched problems of the modes between the pumping light and the oscillate light. The utility model can remarkably increase the output power and the stability of the laser, the light-light conversion efficiency, the light beam quality, etc.
Description
(1) technical field
The utility model belongs to laser technology field, particularly a kind of laser diode-pumped inner cavity frequency-doubling laser, it is suitable for the application in fields such as thermal imaging, laser medicine, scientific research and amusement of pumping source, light storage, laser marking, laser scribing, the printed panel of the panchromatic demonstration of laser, other laser.
(2) background technology
Watt continuous ruddiness of level, green glow, blue laser have important use in the fields such as thermal imaging, laser medicine, scientific research and amusement of the pumping source of the panchromatic demonstration of laser, other laser, light storage, laser marking, laser scribing, printed panel.Laser diode-pumped continuous inner cavity frequency-doubling laser becomes the optimal technology that realizes above-mentioned ruddiness, green glow, blue laser because of advantages such as its high power, high efficiency, high light beam quality, high stability (power and frequency), compact conformations.At present, along with the raising of commercialization laser diodes power, the power output of laser diode-pumped in the world continuous inner cavity frequency-doubling laser is also more and more higher.Exist for such laser, seriously influence power output and stability, the laser beam quality etc. of laser such as the thermal effect (containing thermal lensing effect, thermal birefringence effect etc.) of laser medium and frequency-doubling crystal, " green glow problem " (being double-frequency laser power instability) etc.Insert convex lens in now many employing foldings chamber and (see U.S. Patent number 5446749, its title " Diode pumped, Multi Axial Mode, IntracavityDoubled Laser "; China Patent No. ZL01225034.1, its title " the vertical pumping inner cavity frequency-doubling laser of high-power semiconductor laser "; Chinese patent application numbers 99105276.5, its title " LD pumping inner cavity frequency-doubling laser ") with high stability of optical ballast, insert λ/4 wave plate (C.Czeranowsky in the folding chamber, E.Heumann, and G.Huber, All-solid-state continuous-wavefrequency-doubled Nd:YAG-BiBO 1aser with 2.8W output-power at 473nm, OpticsLetters, Vo1.28 (6), 432 (2003)), annular chamber single-frequency operation (L.Cabaret, J.Philip, and P.Camus, Transient frequency shift in a single-mode quasi-continuous diode-pumpedNd:YAG laser, IEEE Journal of Quantum Electronics, Vol.36 (11), 1323 (2000); M.V.Okhapkin, M.N.Skvortsov, A.M.Belkin, N.L.Kvashnin, and S.N.Bagayev, Tunable single-frequency diode-pumped Nd:YAG ring laser at 1064/532nm foroptical frequency standard applications, Optics Communications, 203,359 (2002)) etc. technology solves.But above-mentioned measure is big because of optical loss, and influences the power output and the light-light conversion efficiency of laser.And the complex structure of laser, not only production cost height, and installation and debug process complexity are unfavorable for producing installation and the layman manipulates.
(3) summary of the invention
The purpose of this utility model is just in order to solve existing thermal effect such as laser medium and frequency-doubling crystal in the above-mentioned prior art, " green glow problem ", and oscillation light and the mode mismatch of pump light in the resonant cavity etc. have a strong impact on the problem of laser output power and stability, light-light conversion efficiency and laser beam quality, and specialized designs goes out a kind of laser diode-pumped inner cavity frequency-doubling laser newly.This laser structure is simply compact, utilize average total reflective mirror, average outgoing mirror and insert the thermal lensing effect that thermally-stabilised resonant cavity that convex lens therebetween form overcomes laser medium and frequency-doubling crystal effectively, " green glow problem " etc. is to laser output power and stability thereof, light-light conversion efficiency, influences such as pattern matching between zlasing mode and oscillation light (being fundamental frequency light) and the pump light, laser output power and stability thereof have been improved greatly, light-light conversion efficiency and laser beam quality, make it in very big pump power scope, laser is in high-efficiency high power TEM
00Operating state.
The purpose of this utility model realizes by following scheme: this laser diode-pumped inner cavity frequency-doubling laser comprises pumping source, optical coupling system, the thermally-stabilised resonant cavity of forming by total reflective mirror, outgoing mirror and insertion lens therebetween, and be placed on laser medium and frequency-doubling crystal in the resonant cavity.Wherein: total reflective mirror and outgoing mirror are average total reflective mirror, and lens are convex lens; Laser medium and near total reflective mirror, is promptly placed at a place with a tight waist of oscillation light between total reflective mirror and convex lens; Frequency-doubling crystal and near outgoing mirror, is promptly placed at another place with a tight waist of oscillation light between convex lens and outgoing mirror.
In the utility model, the focal distance f of the convex lens in the thermally-stabilised resonant cavity and its position in the chamber, the isoparametric design of resonant cavity geometrical length will be according to the thermal focal length f of scope, laser medium and the frequency-doubling crystal of pump power
L1And f
L2, pump light focal beam spot radius w on laser medium
pWith the hot spot waist radius w of oscillation light on total reflective mirror (1) and outgoing mirror (2)
1With w
2Etc. parameter, definite by calculating.Designing requirement is, at thermal focal length f
L1And f
L2When changing significantly, resonant cavity is in steady district, w
1And W
2Still can remain unchanged substantially; Simultaneously, the pattern matching between oscillation light and the pump light in the assurance resonant cavity.
In the utility model, described thermally-stabilised resonant cavity can and insert the average chamber that is applicable to single-ended pumping, profile pump and flash lamp pumping that convex lens are therebetween formed by average total reflective mirror, average outgoing mirror.
In order to increase the quantity of pumping, promptly increase pump power, with the power output of further raising inner cavity frequency-doubling laser with laser diode; Simultaneously can avoid the pumping light power density at laser medium inside-pumping light focal beam spot place excessive, cause the light injury of laser medium etc.Described thermally-stabilised resonant cavity also can be by average total reflective mirror, average outgoing mirror and insert therebetween convex lens, and is arranged on V-type or the L type that the oblique incidence speculum between laser medium and the convex lens forms and is out of shape average chamber.Consider when incidence angle is excessive that oscillation light and frequency multiplication polarization state of light produce bigger variation, laser power and stability thereof are produced bigger influence, the incidence angle of oblique incidence speculum is not more than 45 °, and promptly the folding angle is not more than 90 °.
Above-mentioned thermally-stabilised resonant cavity can also be by average total reflective mirror, average outgoing mirror and insertion convex lens therebetween, and the oblique incidence speculum composition and V-type that is applicable to both-end pumping or the L type employing bilateral frequency doubling technology that are arranged between laser medium and the convex lens are out of shape average chamber.In like manner, consider when incidence angle is excessive that oscillation light and frequency multiplication polarization state of light produce bigger variation, laser power and stability thereof are produced bigger influence, the incidence angle of oblique incidence speculum is not more than 45 °, and promptly the folding angle is not more than 90 °.
Two logical light of the convex lens in thermal stable cavity face fundamental frequency light and frequency doubled light all plates anti-reflection film, and these convex lens can be planoconvex spotlight, also can be biconvex lens.
In the utility model, two logical light faces of average total reflective mirror require relevant pump light, fundamental frequency light and frequency doubled light are carried out optical coating, and logical light face in it logical light face of laser medium (promptly near) plating fundamental frequency light and frequency doubled light increases anti-film at least; The anti-reflection film of outer at least logical light face (i.e. the logical light face of close optical coupling system) plating pump light.If there is the multi-stripe laser spectral line in laser medium, when the stimulated emission cross section of the spectral line that will realize laser output during less than the stimulated emission cross section of existing some spectral line, in the average input mirror logical light face or its two logical light face or average outgoing mirror in the logical light face logical light face of frequency-doubling crystal (promptly near) or its two logical light face also will be to stimulated emission cross section all other spectral lines plating anti-reflection films greater than laser output spectral line.
In the utility model, average outgoing mirror requires fundamental frequency light and frequency doubled light are carried out optical coating, at least in the logical light face logical light face of frequency-doubling crystal (promptly near) to the anti-film of fundamental frequency light plating increasing, to frequency doubled light plating anti-reflection film.
The most outstanding technical characterictic of this laser have following some: (1) is by average total reflective mirror, average outgoing mirror and insert the volume that thermally-stabilised resonant cavity that convex lens therebetween form can overcome the oscillation light mode volume that the increase thermal lensing effect with pump power produced well and reduce the power and the stability thereof of raising oscillation light.(2), make fundamental frequency light hot spot waist radius w on frequency-doubling crystal by average total reflective mirror, average outgoing mirror with insert the oscillation light patterns of change that thermal lensing effect caused of the different focal that thermally-stabilised resonant cavity that convex lens therebetween form can overcome different pump power well and produced
2Keep substantially constant, thereby guarantee shg efficiency.(3) by average total reflective mirror, average outgoing mirror with insert the oscillation light patterns of change that thermal lensing effect caused of the different focal that thermally-stabilised resonant cavity that convex lens therebetween form can overcome different pump power well and produced, the hot spot waist radius w of assurance oscillation light on laser medium
1Basic keep constant, realize pump light different pump powers under and the pattern matching between the oscillation light, the power output of raising laser.(4) by average total reflective mirror, average outgoing mirror with insert the oscillation light patterns of change that thermal lensing effect caused of the different focal that thermally-stabilised resonant cavity that convex lens therebetween form can overcome different pump power well and produced, make fundamental frequency light hot spot on frequency-doubling crystal substantially constant that keeps with a tight waist, thereby guarantee frequency doubled light beam quality height, realize TEM
00Mould output.(5) compare with the folding chamber, the thermally-stabilised cavity resonator structure of being made up of average total reflective mirror, average outgoing mirror and insertion convex lens therebetween is simple, is convenient to production installation and layman and manipulates.
The utility model operation principle is as follows:
Pump light and oscillation light produce more serious thermal lensing effect to laser medium and frequency-doubling crystal respectively, and focal length is respectively f
L1And f
L2Cause reducing of oscillation light mode volume, by average total reflective mirror, average outgoing mirror and the convex lens (focal length is f) that insert in the thermally-stabilised resonant cavity that convex lens therebetween form can compensate the resonant cavity equivalence when making the resonant cavity of this moment and no thermal lensing effect to thermal lensing effect.
The focal distance f of convex lens (3) and its position in the chamber, and the isoparametric design of thermally-stabilised resonant cavity geometrical length L will be according to scope, pump light focal beam spot radius w on laser medium of pump power
p, laser medium and frequency-doubling crystal thermal focal length f
L1And f
L2, the hot spot waist radius w of oscillation light on total reflective mirror (1) and outgoing mirror (2)
1With w
2Etc. parameter, utilize the ABCD law of describing the Gaussian beam transmission to calculate.The condition that realizes thermally-stabilised resonant cavity is as follows:
By average total reflective mirror, average outgoing mirror and the average total reflective mirror and the convex lens that insert in the thermally-stabilised resonant cavity that convex lens therebetween form guaranteed that laser medium is in a place with a tight waist of oscillation light consistently, and the assurance of convex lens wherein oscillation light is at the waist radius w at laser medium place
1Substantially constant.
By average total reflective mirror, average outgoing mirror and the average outgoing mirror and the convex lens that insert in the thermally-stabilised resonant cavity that convex lens therebetween form guaranteed that frequency-doubling crystal is in another place with a tight waist of oscillation light consistently, and the assurance of convex lens wherein oscillation light is at the waist radius w at frequency-doubling crystal place
2Substantially constant, thus shg efficiency and frequency doubled light power stability improved, guarantee high-quality zlasing mode.
3. guarantee the pattern matching between oscillation light and the pump light.
Technique scheme is suitable for laser diode end-face pump, profile pump, and all kinds of inner cavity frequency-doubling lasers of flash lamp pumping.
Advantage of the present utility model is:
(1) in bigger pump power scope, the laser output power height.Utilize the laser diode-pumped continuous Nd of the utility model development: YVO
4/ KTP inner cavity frequency-doubling 532nm laser, under 808nm laser diode tail optical fiber power output 30W pumping, 532nm laser TEM
00Running, power output reaches 6.21W.
(2) in bigger pump power scope, the output power stability height of laser.Utilize the laser diode-pumped continuous Nd of the utility model development: YVO
4/ KTP inner cavity frequency-doubling 532nm laser, during laser output power 6.21W, 4 hours inner laser power output instabilities are 1.1% (root mean square).
(3) in bigger pump power scope, the light of laser-light conversion efficiency height.Utilize the laser diode-pumped continuous Nd of the utility model development: YVO
4Light-the light conversion efficiency of/KTP inner cavity frequency-doubling 532nm laser reaches 23.35%.
(4) in bigger pump power scope, the laser beam quality height.Utilize the laser diode-pumped continuous Nd of the utility model development: YVO
4/ KTP inner cavity frequency-doubling 532nm laser, during laser output power 6.21W, zlasing mode is TEM
00Mould.
(5) optical element of laser use is few, and production cost is low.
(6) laser is simple and compact for structure, is convenient to produce manipulating of installation and layman.
Such laser is very suitable for the application in fields such as thermal imaging, laser medicine, scientific research and amusement of pumping source, light storage, laser marking, laser scribing, the printed panel of pumping source, other laser of the panchromatic demonstration of laser, other laser.
(4) description of drawings
Fig. 1 is the light path schematic diagram of the utility model laser.
Fig. 2 is one of thermally-stabilised resonant cavity distortion of the utility model laser.
Fig. 3 be the utility model laser thermally-stabilised resonant cavity distortion two.
Fig. 4 is the laser diode-pumped continuous Nd of the utility model development: YVO
4The power output and the pump power graph of a relation of/KTP inner cavity frequency-doubling 532nm laser.P
InThe pumping light power of laser medium, P are incided in the axle expression
OutAxle expression 532nm laser output power.
Fig. 5 is the laser diode-pumped continuous Nd of the utility model development: YVO
4Light-the light conversion efficiency and the pump power graph of a relation of/KTP inner cavity frequency-doubling 532nm laser.P
InThe pumping light power of laser medium is incided in the axle expression, and the E axle is represented light-light conversion efficiency.
(5) embodiment
The utility model is described further below in conjunction with accompanying drawing (embodiment), but is not restriction the utility model.
As shown in Figure 1: this laser diode-pumped inner cavity frequency-doubling laser comprises pumping source (7), optical coupling system (6), by average total reflective mirror (1), average outgoing mirror (2) with insert the thermally-stabilised resonant cavity that the convex lens (3) between two mirrors are formed, and be placed on laser medium (4) and frequency-doubling crystal (5) in the resonant cavity, laser medium (4) is positioned between average total reflective mirror (1) and the convex lens (3), and, promptly place at a place with a tight waist of oscillation light near total reflective mirror (1); Frequency-doubling crystal (5) is positioned between convex lens (3) and the average outgoing mirror (2), and near average outgoing mirror (2), promptly places at another place with a tight waist of oscillation light.
Pumping source (7) is a laser diode, output optical maser wavelength 808nm, laser power 30W (U.S. Coherent company produces the FAP-Sys-30 type).Optical coupling system is 800 μ m to the focal beam spot diameter of pump light, and optical coupling efficiency is 94.5%.The outer logical light face plating 808nm anti-reflection film of average total reflective mirror (1); In logical light face plating 1064nm and 532nm increase anti-film; Total reflective mirror is 94% to the transmitance of pump light.Average outgoing mirror (2) plating 1064nm increases anti-film, reflectivity 99%; Plating 532nm anti-reflection film, transmitance 95%.The geometrical length of resonant cavity is 220mm.Convex lens in the resonant cavity are planoconvex spotlight, focal length 50mm; The convex lens average total reflective mirrors of distance (1) are 135mm; Two logical light face plating 1064nm and 532nm anti-reflection films of convex lens.Laser medium (4) adopts Nd:YVO
4Crystal, logical light length is 10mm, mixes Nd concentration 0.3at.%; Two logical light face plating 1064nm, 808nm and 532nm anti-reflection films, wherein the transmitance to 808nm is 97.9%.Frequency-doubling crystal adopts KTP, class angular phase coupling; Logical light length 10mm; Two logical light are in the face of 1064nm and 532nm plating anti-reflection film.Nd:YVO
4With the side of ktp crystal all with being placed on behind the indium sheet parcel in the red copper folder, carry out temperature control with constant temperature circulator.
Measure laser diode-pumped continuous Nd of the present utility model: YVO with 2835-C type double-channel multifunctional laser power/energy meter that U.S. Newport produces
4The power output of/KTP inner cavity frequency-doubling 532nm laser, experimental result as shown in Figure 4.Enter under the situation of laser medium at the 808nm of 26.58W pump light, 532nm laser is realized TEM
00Mould running, power output reaches 6.21W, and light-light conversion efficiency (laser output power/enter the pump power of laser medium) reaches 23.76%, sees for details shown in Figure 5.Under the 532nm laser output power 6.21W situation, the power output instability is about 1.1% (root mean square) in 4 hours.
In order to increase the quantity of pumping with laser diode, promptly increase pump power, power output with further raising inner cavity frequency-doubling laser, simultaneously can avoid the pumping light power density at laser medium inside-pumping light focal beam spot place excessive, cause the light injury of laser medium etc., the resonant cavity of laser of the present utility model can adopt as Fig. 2 and V-type as shown in Figure 3 and L type and be out of shape average chamber.Particularly bilateral frequency doubling technology as shown in Figure 3 can obtain higher double-frequency laser power and light-light conversion efficiency.
Passing through among Fig. 2 of the present utility model increases an oblique incidence speculum (8), thereby can increase pumping laser diode (10) and optical coupling system (9) easily; Logical light face (being first reflecting surface of oscillation light) was to pump light plating anti-reflection film in wherein speculum required at least, oscillation light and frequency doubled light all plated increase anti-film.Requiring among other optical element and Fig. 1 is identical.
Passing through among Fig. 3 of the present utility model increases an oblique incidence speculum (8), thereby can increase pumping laser diode (10) and optical coupling system (9) easily; Logical light face (being first reflecting surface of oscillation light) all plated anti-reflection film to pump light and frequency doubled light in wherein speculum required at least, to the anti-film of oscillation light plating increasing; Logical light increased anti-film in the face of oscillation light and frequency doubled light all plate in average mirror (2) required at least.
Claims (7)
1. laser diode-pumped inner cavity frequency-doubling laser, it comprises pumping source (7), optical coupling system (6), the thermally-stabilised resonant cavity of forming by total reflective mirror (1), outgoing mirror (2) and lens (3), and be placed on thermally-stabilised resonant cavity interior laser medium (4) and frequency-doubling crystal (5), it is characterized in that:
A. total reflective mirror (1) is average mirror;
B. outgoing mirror (2) is average mirror;
C. lens (3) are convex lens;
D. laser medium (4) is positioned between total reflective mirror (1) and the lens (3), and near total reflective mirror (1), promptly places at a place with a tight waist of oscillation light;
E. frequency-doubling crystal (5) is positioned between lens (3) and the outgoing mirror (2), and near outgoing mirror (2), promptly places at another place with a tight waist of oscillation light.
2. inner cavity frequency-doubling laser according to claim 1, it is characterized in that: the focal length of convex lens (3) and the position that is placed in the chamber, and the isoparametric design of thermally-stabilised resonant cavity geometrical length, be according to the thermal focal length f of scope, laser medium and the frequency-doubling crystal of pump power
L1And f
L2, pump light focal beam spot radius w
p, the hot spot waist radius w of oscillation light on total reflective mirror (1) and outgoing mirror (2)
1And w
2Calculate etc. parameter.
3. inner cavity frequency-doubling laser according to claim 1 is characterized in that: thermally-stabilised resonant cavity is by average total reflective mirror (1), average outgoing mirror (2) and insert the average chamber that is applicable to single-ended pumping, profile pump and flash lamp pumping that convex lens (3) are therebetween formed.
4. inner cavity frequency-doubling laser according to claim 1, it is characterized in that: thermally-stabilised resonant cavity is by average total reflective mirror (1), average outgoing mirror (2) and insertion convex lens (3) therebetween, and is arranged on oblique incidence speculum that form and V-type that be applicable to both-end pumping or L type distortion Ping-Ping chamber between laser medium and the convex lens.
5. inner cavity frequency-doubling laser according to claim 1, it is characterized in that: thermally-stabilised resonant cavity is by average total reflective mirror (1), average outgoing mirror (2) and insertion convex lens (3) therebetween, and is arranged on oblique incidence speculum that form and the V-type that is applicable to both-end pumping that adopt the bilateral frequency doubling technology or L type distortion Ping-Ping chamber between laser medium and the convex lens.
6. inner cavity frequency-doubling laser according to claim 1 is characterized in that: two logical light faces of convex lens (3) have corresponding fundamental frequency light and frequency doubled light anti-reflection film.
7. inner cavity frequency-doubling laser according to claim 1 is characterized in that: total reflective mirror (1) at least in logical light face have corresponding fundamental frequency light and frequency doubled light to increase anti-film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420075268 CN2747754Y (en) | 2004-12-01 | 2004-12-01 | Internal cavity frequency doubling laser of laser diode pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420075268 CN2747754Y (en) | 2004-12-01 | 2004-12-01 | Internal cavity frequency doubling laser of laser diode pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2747754Y true CN2747754Y (en) | 2005-12-21 |
Family
ID=35708294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420075268 Expired - Lifetime CN2747754Y (en) | 2004-12-01 | 2004-12-01 | Internal cavity frequency doubling laser of laser diode pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2747754Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109616865A (en) * | 2018-12-20 | 2019-04-12 | 昆山衍迪激光科技有限公司 | A kind of mode of laser group |
-
2004
- 2004-12-01 CN CN 200420075268 patent/CN2747754Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109616865A (en) * | 2018-12-20 | 2019-04-12 | 昆山衍迪激光科技有限公司 | A kind of mode of laser group |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1162945C (en) | High-efficiency high power third harmonic wave laser generating technique | |
| CN203103752U (en) | Polarization locking semiconductor pump all-solid-state laser with high power stability | |
| CN100337373C (en) | Internal cavity multiple frequency laser of laser diode pump | |
| CN1211095A (en) | All-solid self-mode-locking femtosecond laser | |
| CN101055398A (en) | End surface pumped continuous red light laser | |
| CN100337374C (en) | High power inner cavity frequency doubling laser | |
| CN102044834B (en) | Nonlinear mirror self-mode-locking laser | |
| CN2747754Y (en) | Internal cavity frequency doubling laser of laser diode pump | |
| CN101051165A (en) | End surface pump contineous blue light laser | |
| CN101257182B (en) | Quasi continuous green light laser with two-chamber interconnect V type structure one-way overlap output | |
| CN1870361A (en) | Semiconductor laser pumping double-channel passive Q regulation pulse sum frequency laser | |
| CN110165532B (en) | Laser and method for improving dual-wavelength laser efficiency through gain compensation | |
| CN2747755Y (en) | High power internal frequency doubling laser | |
| CN109103738B (en) | Solid laser with zero heat generation in full pumping range | |
| CN200953430Y (en) | Semiconductor end pumping air-cooling single-mode green-light laser | |
| CN201383621Y (en) | Full-solid sum-frequency laser of co-linear double-laser crystal | |
| CN101267084B (en) | Multiple frequency one-way overlapped output standard continuous green light laser inside full solid T double-cavity combination cavity | |
| CN212725943U (en) | High-coupling-efficiency kilowatt-level optical fiber output nanosecond laser with arbitrarily adjustable power | |
| CN1294682C (en) | Multi-wavelength synchronous running continuous laser | |
| CN212968481U (en) | Laser with high repetition frequency and multi-wavelength output | |
| CN2566506Y (en) | High effcient high power solid laser for laser diode end-pumping | |
| CN101986486B (en) | Optical parametric oscillator for intracavity mode mismatch compensation | |
| CN1233869A (en) | Self-mode-locking laser | |
| CN1238935C (en) | Double-mirror ring travelling-wave laser | |
| CN111048975B (en) | LiNbO as blue light LD pump Pr3Sodium yellow Raman laser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20041201 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |