CN104009375A - Yellow-light self-Raman laser - Google Patents
Yellow-light self-Raman laser Download PDFInfo
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- CN104009375A CN104009375A CN201410133335.0A CN201410133335A CN104009375A CN 104009375 A CN104009375 A CN 104009375A CN 201410133335 A CN201410133335 A CN 201410133335A CN 104009375 A CN104009375 A CN 104009375A
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Abstract
The invention relates to a yellow-light self-Raman laser. The yellow-light self-Raman laser comprises a laser diode, a coupling optical fiber, a condensing lens, an input cavity lens, a self-Raman laser crystal, a Q adjusting device and an output cavity lens which are all sequentially arranged in the exit direction of an optical path, wherein the self-Raman laser crystal is a neodymium-doped calcium oxide borate salt crystal, the neodymium-doped calcium oxide borate salt crystal comprises neodymium-doped YCOB Nd:YCOB or neodymium-doped GdCOB Nd:GdCOB, and the neodymium ion doping concentration of the neodymium-doped YCOB Nd:YCOB or the neodymium-doped GdCOB Nd:GdCOB of the self-Raman laser crystal ranges from 0.1 at% to 30 at%. According to the yellow-light self-Raman laser, the neodymium-doped calcium oxide borate salt crystal serves as the self-Raman laser crystal, and therefore both laser gain mediums and Raman gain mediums can be obtained, the self-Raman effect can also be achieved, a frequency doubling crystal is reduced compared with a traditional self-Raman laser crystal, and the yellow-light self-Raman laser is smaller in size, more compact in structure, lower in cost, more stable in operation and suitable for large-scale batch industrial production and has good market application prospect.
Description
Technical field
The present invention relates to a kind of gold-tinted from Raman laser, belong to the technical field of laser.
Background technology
550～600nm yellow band laser has irreplaceable using value in fields such as medical treatment, demonstration, satellite guiding, undersea detections, and compact conformation, Yellow light laser stable, with low cost become the focus that numerous researchers pay close attention to gradually.The all kinds Yellow light lasers such as copper-vapor laser, dyestuff Yellow light laser, optical pumping semiconductor laser, dual wavelength and frequency Nd laser, Raman laser arise at the historic moment.Copper-vapor laser complex structure, in order to make copper gasification, this laser must possess the temperature that an electric calorifie installation is heated to copper 1500 DEG C.General use can be high temperature resistant and have the alumina material of good vacuum tight performance to do shell, and its outside around on heating wire carry out metal in heating tube.This laser works temperature is quite high, exists serious technological problems.Dyestuff Yellow light laser is an important directions of the early stage research of Yellow light laser, but its power output is low, poor stability, dyestuff are poisonous and the reason such as unstable properties, circulating cooling system complexity has restricted its development.
Optical pumping semiconductor laser can produce any wavelength laser in 477～600nm wave band in theory, but for each target wavelength, semiconductor all will pass through special design, with high costs.Dual wavelength and frequently Nd laser are mainly to utilize 1060nm that nonlinear crystal produces neodymium-doped operation material in resonant cavity and 1300nm wavelength laser and frequency to produce near laser 590nm, this mode output wavelength is comparatively single, conversion efficiency is lower, is of limited application.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of gold-tinted from Raman laser.Laser of the present invention is to utilize a neodymium-doped oxygen crystals of calcium salts, as gain medium and raman gain medium, by laser diode-pumped energy of light source being converted into gold-tinted Laser output from Raman effect.
Term explanation:
1, LD, the abbreviation of semiconductor laser;
2, Nd:YCOB, the general abbreviation of the borate doped calcium oxygen of neodymium yttrium;
3, Nd:GdCOB, the general abbreviation of the borate doped calcium oxygen of neodymium gadolinium;
Technical scheme of the present invention is as follows:
A kind of gold-tinted from Raman laser comprise the laser diode that sets gradually along light path exit direction, coupled fiber, collector lens, input cavity mirror, from raman laser crystal, Q-switching device and output cavity mirror;
Described is neodymium-doped oxygen crystals of calcium salts from raman laser crystal, and described neodymium-doped oxygen crystals of calcium salts comprises the borate doped calcium oxygen of neodymium yttrium Nd:YCOB or the borate doped calcium oxygen of neodymium gadolinium Nd:GdCOB;
Described neodymium ion doped concentration in raman laser crystal neodymium borate doped calcium oxygen yttrium Nd:YCOB or the borate doped calcium oxygen of neodymium gadolinium Nd:GdCOB is 0.1-30at%;
Describedly press optical direction cutting from raman laser crystal, cut direction is the frequency multiplication direction producing from 589nm laser;
Under the effect of laser diode pumping source, 808nm pump light is by producing 1061nm laser from raman laser crystal, and then Raman shift produces 1178nm laser, vibrates, through export 589nm gold-tinted laser from the effect of raman laser crystal double frequency in laser cavity.
Preferred according to the present invention, described laser diode is the semiconductor laser LD that produces 808nm laser;
The logical light face plating of described input cavity mirror and close laser diode is with the deielectric-coating of 808nm high transmission; Described input cavity mirror and away from the logical light face plating of laser diode the deielectric-coating with 808nm high transmission film and 1178nm and the high reflection of 589nm; The described two-sided high transmission deielectric-coating all plating with 808nm, 1178nm and 589nm from raman laser crystal; The two-sided high transmission deielectric-coating all plating with 1178nm and 589nm of described Q-switching device; The logical light face plating of described output cavity mirror and close laser diode is with the deielectric-coating of the high reflection of 1178nm and 589nm high transmission; Described output cavity mirror and away from the logical light face plating of laser diode the deielectric-coating with 589nm high transmission.
Preferred according to the present invention, described is cylindrical or cuboid from raman laser crystal; Its optical direction length is 0.1-20mm.
Preferred according to the present invention, the described optical direction length from raman laser crystal is 1-10mm.
Preferred according to the present invention, the described optical direction length from raman laser crystal is 4-8mm.
Preferred according to the present invention, described neodymium ion doped concentration in raman laser crystal neodymium borate doped calcium oxygen yttrium Nd:YCOB or the borate doped calcium oxygen of neodymium gadolinium Nd:GdCOB is 8-15at%.
If above-mentioned gold-tinted is from the method for work of Raman laser, comprise that step is as follows:
Under the effect of laser diode pumping source, 808nm pump light is by producing 1061nm laser from raman laser crystal, and then Raman shift produces 1178nm laser, vibrates, through export 589nm gold-tinted laser from the effect of raman laser crystal double frequency in laser cavity;
Described is neodymium-doped oxygen crystals of calcium salts from raman laser crystal, and described neodymium-doped oxygen crystals of calcium salts comprises the borate doped calcium oxygen of neodymium yttrium Nd:YCOB or the borate doped calcium oxygen of neodymium gadolinium Nd:GdCOB;
Described neodymium ion doped concentration in raman laser crystal neodymium borate doped calcium oxygen yttrium Nd:YCOB or the borate doped calcium oxygen of neodymium gadolinium Nd:GdCOB is 0.1-30at%;
Describedly press optical direction cutting from raman laser crystal, cut direction is the frequency multiplication direction producing from 589nm laser.
Advantage of the present invention is:
All-solid-state yellow Raman laser is the stimulated raman scattering that utilizes crystal medium, be called for short SRS, will have the direct frequency displacement of green light band laser to yellow band or first by the frequency displacement of 1060nm laser to 1100nm again to 1100nm frequency multiplication obtain gold-tinted.The laser of realizing gold-tinted output by SRS effect mainly contains three classes: inner chamber Raman laser, from Raman laser, external cavity type Raman laser.Compared with other Yellow light lasers, Raman laser structure simple (SRS effect combines with all-solid state laser technology), conversion efficiency are high, with low cost, and its development prospect is considerable.
Laser crystal in Raman laser is gain medium and raman gain medium, and owing to having lacked independent Raman crystal in chamber, insertion loss reduces, and chamber is long shortens, and structure is more compact, moves more stable.
Gold-tinted of the present invention utilizes a neodymium-doped oxygen crystals of calcium salts as from raman laser crystal from Raman laser, be gain medium and raman gain medium, also can realize from Raman effect, reduced by a frequency-doubling crystal than tradition from Raman laser, volume is less, more compact structure, cost is lower, move more stable, be applicable to extensive mass industrial production, there is good market application foreground.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
1. laser diode, 2. coupled fiber, 3. collector lens, 4. input cavity mirror, 5. from raman laser crystal, 6. Q-switching device, 7. output cavity mirror, 8. gold-tinted laser.
Embodiment
Below in conjunction with embodiment, the present invention is described further, but is not limited to this.
In the following ways logical light face is described in order to illustrate in more succinct embodiment: being called front surface from raman laser crystal near the logical light face of LD, is rear surface away from the logical light face of LD.Input cavity mirror is called front surface near the logical light face of LD, is rear surface away from the logical light face of LD.Output cavity mirror is called front surface near the logical light face of LD, is rear surface away from the logical light face of LD.
As shown in Figure 1.
Embodiment 1,
A kind of gold-tinted from Raman laser comprise the laser diode 1 that sets gradually along light path exit direction, coupled fiber 2, collector lens 3, input cavity mirror 4, from raman laser crystal 5, Q-switching device 6 and output cavity mirror 7;
Described is neodymium-doped oxygen crystals of calcium salts from raman laser crystal 5, and described neodymium-doped oxygen crystals of calcium salts is the borate doped calcium oxygen of neodymium yttrium Nd:YCOB;
Described neodymium ion doped concentration in the borate doped calcium oxygen of raman laser crystal 5 neodymium yttrium Nd:YCOB is 8at%;
Describedly press optical direction cutting from raman laser crystal 5, cut direction is the frequency multiplication direction producing from 589nm laser.
Under the effect of laser diode 1 pumping source, 808nm pump light is by producing 1061nm laser from raman laser crystal 5, and then Raman shift produces 1178nm laser, vibrates, through exporting 589nm gold-tinted laser from the 5 frequency multiplication effects of raman laser crystal in laser cavity.
Described laser diode 1 is for producing the semiconductor laser LD of 808nm laser; Emission wavelength is the semiconductor laser LD1 of 808nm, through coupled fiber 2, carries out beam shaping, the parallel front surface that is input to input cavity mirror 4 by collector lens group 3.
The logical light face plating of described input cavity mirror 4 and close laser diode 1 is with the deielectric-coating of 808nm high transmission; Described input cavity mirror 4 and the deielectric-coating reflecting with 808nm high transmission film, 1178nm and 589nm height away from the logical light face plating of laser diode; The described two-sided high transmission deielectric-coating all plating with 808nm, 1178nm and 589nm from raman laser crystal 5; The two-sided high transmission deielectric-coating all plating with 1178nm and 589nm of described Q-switching device; The logical light face plating of described output cavity mirror and close laser diode is with the deielectric-coating of the high reflection of 1178nm and 589nm high transmission; Described output cavity mirror and away from the logical light face plating of laser diode the deielectric-coating with 589nm high transmission.
Described is cylindrical or cuboid from raman laser crystal; Its optical direction length is 5mm.
Embodiment 2,
Gold-tinted, from the method for work of Raman laser, comprises that step is as follows as described in Example 1:
Under the effect of laser diode pumping source, 808nm pump light is by producing 1061nm laser from raman laser crystal, then Raman shift produces 1178nm laser, vibrates, through export 589nm gold-tinted laser from the effect of the borate doped calcium oxygen of raman laser crystal neodymium yttrium Nd:YCOB frequency multiplication in laser cavity;
Described neodymium ion doped concentration in the borate doped calcium oxygen of raman laser crystal neodymium yttrium Nd:YCOB is 8at%;
Embodiment 3,
Gold-tinted is from Raman laser as described in Example 1, and its difference is,
Described is neodymium-doped oxygen crystals of calcium salts from raman laser crystal 5, and described neodymium-doped oxygen crystals of calcium salts is the borate doped calcium oxygen of neodymium gadolinium Nd:GdCOB;
Described neodymium ion doped concentration in the borate doped calcium oxygen of raman laser crystal 5 neodymium gadolinium Nd:GdCOB is 8at%;
The described two-sided high transmission deielectric-coating all plating with 808nm, 1178nm and 589nm from the borate doped calcium oxygen of raman laser crystal 5 neodymium gadolinium Nd:GdCOB.
Describedly press optical direction cutting from raman laser crystal 5, cut direction is the frequency multiplication direction producing from 589nm laser.Described is cylindrical or cuboid from raman laser crystal; Its optical direction length is 5mm.
Embodiment 4,
Gold-tinted, from the method for work of Raman laser, comprises that step is as follows as described in Example 3:
Under the effect of laser diode 1 pumping source, 808nm pump light is by producing 1061nm laser from raman laser crystal 5, then Raman shift produces 1178nm laser, in laser cavity, vibrate, through export 589nm gold-tinted laser from the effect of the borate doped calcium oxygen of raman laser crystal 5 neodymium gadolinium Nd:GdCOB frequency multiplication;
Described neodymium ion doped concentration in the borate doped calcium oxygen of raman laser crystal 5 neodymium gadolinium Nd:GdCOB is 8at%.
Embodiment 5,
Gold-tinted is from Raman laser as described in Example 1, and its difference is,
Described is neodymium-doped oxygen crystals of calcium salts from raman laser crystal, and described neodymium-doped oxygen crystals of calcium salts is the borate doped calcium oxygen of neodymium yttrium Nd:YCOB crystal;
Described neodymium ion doped concentration in the borate doped calcium oxygen of raman laser crystal neodymium yttrium Nd:YCOB crystal is 20at%;
Describedly press optical direction cutting from raman laser crystal, cut direction is the frequency multiplication direction producing from 589nm laser.Described is cylindrical or cuboid from raman laser crystal; Its optical direction length is 2mm.
Embodiment 6,
Gold-tinted is from Raman laser as described in Example 5, and its difference is,
Described neodymium ion doped concentration in the borate doped calcium oxygen of raman laser crystal 5 neodymium gadolinium Nd:GdCOB is 5at%;
Describedly press optical direction cutting from raman laser crystal 5, cut direction is the frequency multiplication direction producing from 589nm laser.Described is cylindrical or cuboid from raman laser crystal; Its optical direction length is 8mm.
Claims (8)
1. gold-tinted, from a Raman laser, is characterized in that, described laser comprises the laser diode that sets gradually along light path exit direction, coupled fiber, collector lens, input cavity mirror, from raman laser crystal, Q-switching device and output cavity mirror; Described is neodymium-doped oxygen crystals of calcium salts from raman laser crystal, and described neodymium-doped oxygen crystals of calcium salts comprises the borate doped calcium oxygen of neodymium yttrium Nd:YCOB or the borate doped calcium oxygen of neodymium gadolinium Nd:GdCOB; Described neodymium ion doped concentration in raman laser crystal neodymium borate doped calcium oxygen yttrium Nd:YCOB or the borate doped calcium oxygen of neodymium gadolinium Nd:GdCOB is 0.1-30at%; Describedly press optical direction cutting from raman laser crystal, cut direction is the frequency multiplication direction producing from 589nm laser; Under the effect of laser diode pumping source, 808nm pump light is by producing 1061nm laser from raman laser crystal, and then Raman shift produces 1178nm laser, vibrates, through export 589nm gold-tinted laser from the effect of raman laser crystal double frequency in laser cavity.
2. a kind of gold-tinted according to claim 1, from Raman laser, is characterized in that, described laser diode is the semiconductor laser LD that produces 808nm laser.
3. a kind of gold-tinted according to claim 1, from Raman laser, is characterized in that, described input cavity mirror and the logical light face near laser diode plate the deielectric-coating with 808nm high transmission; Described input cavity mirror and away from the logical light face plating of laser diode the deielectric-coating with 808nm high transmission film and 1178nm and the high reflection of 589nm; The described two-sided high transmission deielectric-coating all plating with 808nm, 1178nm and 589nm from raman laser crystal; The two-sided high transmission deielectric-coating all plating with 1178nm and 589nm of described Q-switching device; The logical light face plating of described output cavity mirror and close laser diode is with the deielectric-coating of the high reflection of 1178nm and 589nm high transmission; Described output cavity mirror and away from the logical light face plating of laser diode the deielectric-coating with 589nm high transmission.
4. a kind of gold-tinted according to claim 1, from Raman laser, is characterized in that, described is cylindrical or cuboid from raman laser crystal; Its optical direction length is 0.1-20mm.
5. a kind of gold-tinted according to claim 4, from Raman laser, is characterized in that, the described optical direction length from raman laser crystal is 1-10mm.
6. a kind of gold-tinted according to claim 5, from Raman laser, is characterized in that, the described optical direction length from raman laser crystal is 4-8mm.
7. a kind of gold-tinted according to claim 1, from Raman laser, is characterized in that, described neodymium ion doped concentration in raman laser crystal neodymium borate doped calcium oxygen yttrium Nd:YCOB or the borate doped calcium oxygen of neodymium gadolinium Nd:GdCOB is 8-15at%.
8. gold-tinted is from the method for work of Raman laser, as follows as claimed in claim 1:
Under the effect of laser diode pumping source, 808nm pump light is by producing 1061nm laser from raman laser crystal, and then Raman shift produces 1178nm laser, vibrates, through export 589nm gold-tinted laser from the effect of raman laser crystal double frequency in laser cavity; Described is neodymium-doped oxygen crystals of calcium salts from raman laser crystal, and described neodymium-doped oxygen crystals of calcium salts comprises the borate doped calcium oxygen of neodymium yttrium Nd:YCOB or the borate doped calcium oxygen of neodymium gadolinium Nd:GdCOB; Described neodymium ion doped concentration in raman laser crystal neodymium borate doped calcium oxygen yttrium Nd:YCOB or the borate doped calcium oxygen of neodymium gadolinium Nd:GdCOB is 0.1-30at%; Describedly press optical direction cutting from raman laser crystal, cut direction is the frequency multiplication direction producing from 589nm laser.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104348081A (en) * | 2014-11-25 | 2015-02-11 | 山东大学 | Application of Ca3(BO3)2 crystal stimulated Raman scattering |
| CN108336639A (en) * | 2017-01-19 | 2018-07-27 | 中国科学院福建物质结构研究所 | One kind is from Raman selfdouble frequency solid state laser |
| CN111048975A (en) * | 2019-12-27 | 2020-04-21 | 河北工业大学 | LiNbO as blue light LD pump Pr3Sodium yellow Raman laser |
| CN114725766A (en) * | 2022-03-29 | 2022-07-08 | 同济大学 | Yellow laser based on self-frequency-doubling laser crystal |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104348081A (en) * | 2014-11-25 | 2015-02-11 | 山东大学 | Application of Ca3(BO3)2 crystal stimulated Raman scattering |
| CN108336639A (en) * | 2017-01-19 | 2018-07-27 | 中国科学院福建物质结构研究所 | One kind is from Raman selfdouble frequency solid state laser |
| CN111048975A (en) * | 2019-12-27 | 2020-04-21 | 河北工业大学 | LiNbO as blue light LD pump Pr3Sodium yellow Raman laser |
| CN111048975B (en) * | 2019-12-27 | 2021-07-09 | 河北工业大学 | LiNbO as blue light LD pump Pr3Sodium yellow Raman laser |
| CN114725766A (en) * | 2022-03-29 | 2022-07-08 | 同济大学 | Yellow laser based on self-frequency-doubling laser crystal |
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