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Barium tungstate crystal all-solid-state continuous Raman laser

A Raman laser and Raman laser technology, applied in the field of lasers, can solve problems such as not being able to meet the needs of use, and achieve the effect of fast start-up

Inactive Publication Date: 2009-09-09
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is: most of the existing Raman lasers work in the pulse wave mode, which cannot meet the needs of use, and the effect of the continuous wave Raman lasers currently being studied still needs to be improved; a simple and compact structure is needed The continuously operating all-solid-state Raman laser reduces the threshold of the continuous Raman laser and improves the Raman conversion efficiency

Method used

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  • Barium tungstate crystal all-solid-state continuous Raman laser
  • Barium tungstate crystal all-solid-state continuous Raman laser
  • Barium tungstate crystal all-solid-state continuous Raman laser

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Embodiment approach

[0027] The second embodiment of the present invention is as figure 2 , an intracavity frequency-doubled barium tungstate crystal continuous yellow laser, the optical components and materials used are: a diode laser for end or side pumping, a coated laser input cavity mirror 1 and an output cavity mirror 4, an independent laser Gain medium 2; an independent Raman medium 3; a frequency doubling crystal 5 is arranged between the Raman medium 3 and the output cavity mirror 4, and the fundamental frequency light generated by the laser gain medium 2 enters the Raman medium 3 to generate Raman laser , Raman laser incident frequency doubling crystal 5, produces frequency doubling yellow light, frequency doubling yellow light and Raman laser resonant cavities are nested in the laser resonant cavity, output cavity mirror 4 is high for fundamental frequency light and Raman laser On the contrary, part of the frequency-doubled light is transmitted, and the output cavity mirror 4 finally o...

Embodiment 1

[0031] according to figure 1 A simple and compact barium tungstate crystal all-solid-state CW Raman laser was fabricated. Diode lasers for side or end pumping, a flat mirror, highly transparent to 808nm wavelength pump light, highly reflective to 1064nm and 1180nm wavelength lasers, as input cavity mirror 1; Nd 3+ :YVO 4 Crystal as laser gain medium 2; BaWO 4 The crystal is a Raman medium 3; a plano-concave mirror is highly reflective to both 1064nm and 1180nm wavelength lasers, and the reflectivity of fundamental frequency light is higher than that of Raman light, which is the output cavity mirror of the laser 4. 808nm laser diode Pump Nd 3+ :YVO 4 The crystal produces laser light with a wavelength of 1064nm through the Raman gain medium BaWO 4 The crystal produces a Raman frequency shift, which converts from 1064nm fundamental frequency light to 1180nm wavelength Raman laser. Here, two mirror cavities are used. The 1064nm and 1180nm wavelength lasers are obtained in the...

Embodiment 2

[0033] according to figure 2 Fabricate an intracavity doubled barium tungstate crystal continuous yellow Raman laser. Diode lasers for side or end pumping, a flat mirror, highly transparent to 808nm wavelength pump light, highly reflective to 1064nm and 1180nm wavelength lasers, as input cavity mirror 1; Nd 3+ :YVO 4 Crystal as laser gain medium 2; BaWO 4 The crystal is a Raman medium 3; the frequency-doubling LBO crystal is a frequency-doubling crystal 5; a plano-concave mirror, which is highly reflective to 1064nm and 1180nm wavelength lasers, partially transmits the frequency-doubling light at 590nm, and is the output cavity mirror of the laser 4. 808nm Laser diode pumped Nd 3+ :YVO 4 The crystal produces laser light with a wavelength of 1064nm, by BaWO 4 Raman crystal produces Raman frequency shift, from 1064nm fundamental frequency light to 1180nm wavelength Raman laser, and then through frequency doubling LBO crystal to generate 590nm yellow light output, here 1180...

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Abstract

The invention relates to a barium tungstate crystal all-solid-state continuous Raman laser. A barium tungstate crystal is used as a Raman medium to be placed into a laser resonant cavity and performs intracavity Raman conversion on,fundamental light produced by a laser gain medium so as to obtain Raman laser output with 1180 nm continuous running. The laser gain medium is an Nd: YVO4 crystal or other laser crystals mixed with Nd<3+>, Yb<3+> and Pr<3+>. The invention has simple and compact structure, overcomes the adverse effects of high Raman threshold values and serious thermal effect in a continuous running mode, obtains high beam quality, achieves the continuous Raman laser output of low threshold values and high power, efficiency and stability, has high application value in the fields of medical treatment, weather, maritime affairs, military affairs, aviation, scientific research, and the like, and obtains the continuous Raman laser output with different wavelengths by selecting different laser gain media for performing frequency transformation on different fundamental waves.

Description

technical field [0001] The invention belongs to the technical field of lasers, and relates to a Raman laser, in particular to a barium tungstate crystal all-solid-state continuous Raman laser. Background technique [0002] Based on the stimulated Raman scattering (SRS) effect, solid-state Raman lasers can obtain wavelengths that solid-state lasers cannot directly emit. Compared with traditional liquid and gas stimulated Raman materials, solid Raman materials have excellent mechanical and chemical stability, long life, high gain, high thermal conductivity, and can work at high frequencies. The Raman laser produced by it can obtain the laser output in the yellow band through the frequency doubling technology. The laser in the yellow band is close to the most sensitive wavelength of the human eye (555nm), which is suitable for laser display and lighting, especially in foggy conditions Under the geodetic survey and various collimation occasions have special uses. Yellow laser ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/30H01S3/16H01S3/08H01S3/109H01S3/106G02F1/355G02F1/35
Inventor 樊亚仙樊莉王慧田王琴
Owner NANJING UNIV
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