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LD terminal pump yellow light laser

A laser and yellow light technology, applied in the direction of lasers, laser parts, phonon exciters, etc., can solve the problems of small nonlinear coefficient, low power, high price, etc., and achieve stable performance, high efficiency, and low cost.

Inactive Publication Date: 2008-04-09
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the method of intracavity frequency doubling, the method of sum frequency has the disadvantages of large volume, low power, poor conversion efficiency, unstable structure, and difficult to realize.
The current intracavity frequency doubling mostly uses lithium triborate single crystal (LBO) as the frequency doubling crystal, but lithium triborate crystal LBO is prone to deliquescence, high price, small nonlinear coefficient, and phase matching is greatly affected by temperature. , need to keep the temperature constant and other harsh conditions, difficult to control

Method used

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  • LD terminal pump yellow light laser

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Experimental program
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Effect test

Embodiment 1

[0020] As shown in Figure 1, the device of the present invention comprises a laser diode LD end pump source 1, an optical fiber 2, a coupling lens 3 and a resonant cavity, a neodymium-doped yttrium aluminum garnet Nd:YAG crystal 5, an acousto-optic Q-switching device 6, vanadic acid GdVO 4 Crystal 7 and potassium titanyl phosphate KTP crystal 8; the pump light emitted by LD end-face pump source 1 enters the resonant cavity through optical fiber 2 and coupling lens 3, which is characterized in that the resonant cavity is composed of rear cavity mirror 4 and output mirror 9 , the front end is the rear cavity mirror 4, the rear end is the output mirror 9, and the neodymium-doped yttrium aluminum garnet Nd:YAG crystal 5, the acousto-optic Q-switching device 6, and the gadolinium vanadate GdVO are sequentially placed in the resonant cavity 4 Crystal 7 and potassium titanyl phosphate KTP crystal 8; the above crystals are surrounded by metal blocks with through holes and pipes, the c...

Embodiment 2

[0031]Same as embodiment 1, except that the RF wave modulation frequency of the acousto-optic Q-switching device 6 is 15KHz; the radius of curvature of the rear cavity mirror 4 is 1000mm; the Nd-doped yttrium aluminum garnet Nd:YAG base The doping concentration of frequency crystal 5 is 1%.

[0032] The working process of the laser: the 808nm pump light emitted by the LD end pump source 1 enters the neodymium-doped yttrium aluminum garnet Nd:YAG crystal 5 through the optical fiber 2 and the coupling lens 3, when the Q-switching switch of the acousto-optic Q-switching device 6 is turned off , the pump light is converted into inversion particles and stored; when the Q switch is turned on, a large number of accumulated inversion particles are instantly transformed into 1064.2 nm fundamental frequency light through stimulated radiation; the fundamental frequency light with higher peak power passes through gadolinium vanadate QUR 4 The crystal 7 is transformed into 1174.5nm Raman ...

Embodiment 3

[0034] Same as embodiment 1, except that the RF wave modulation frequency of the acousto-optic Q-switching device 6 is 25KHz; the radius of curvature of the rear cavity mirror 4 is 1000mm; The doping concentration of frequency crystal 5 is 1.2%.

[0035] The working process of the laser: the 808nm pump light emitted by the LD end pump source 1 enters the neodymium-doped yttrium aluminum garnet Nd:YAG crystal 5 through the optical fiber 2 and the coupling lens 3, when the Q switch of the acousto-optic Q switch device 6 is turned off , the pump light is converted into inverted particles and stored; when the Q switch is turned on, a large number of accumulated inverted particles are instantly transformed into 1064.2nm fundamental frequency light through stimulated radiation; the fundamental frequency light with higher peak power passes through gadolinium vanadate QUR 4 The crystal 7 is transformed into 1174.5nm Raman light due to stimulated Raman scattering; the Raman light is f...

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Abstract

A LD end-pumped Nd:YAG / GdVO4 / KTP yellow laser pertains to the field of solid state laser. The invention uses an LD end to pump neodymium-doped yttrium aluminum garnet (Nd:YAG) to produce a fundamental frequency laser, which is transformed to be a Raman light after passing through Raman crystal gadolinium vanadium (GdVO4), and then processed by frequency doubling crystal potassium titanyl phosphate (KTP) to realize intra-cavity frequency doubling; finally, the yellow laser is generated. The yellow laser has the advantages of small volume, stable performance, high power, low cost and so on, and has wide practicability.

Description

(1) Technical field [0001] The invention relates to a solid-state laser, in particular to an LD end-pumped Nd:YAG / GdVO 4 / KTP yellow laser. (2) Background technology [0002] At present, there have been reports about solid-state yellow light lasers in foreign countries. They mainly use two methods to realize them: one is to combine two beams of light and frequency (Intracavity sum-frequency generation of 3.23 W continuous-wave yellow light in anNd:YAG laser, " Optics Communications", Vol.255, 2005, 248-252), the second is to use frequency doubling technology in the cavity (Efficient all-solid-state yellow laser source producing 1.2-W average power, "Optics Letters", Vol.24, 1999, 1490-1492). Compared with the method of intracavity frequency doubling, the method of sum frequency has the disadvantages of large volume, low power, poor conversion efficiency, unstable structure, and difficult to realize. The current intracavity frequency doubling mostly uses lithium triborate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/08H01S3/042H01S3/0941H01S3/16H01S3/117H01S3/108H01S3/109
Inventor 李述涛张行愚王青圃陈晓寒丛振华
Owner SHANDONG UNIV
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