LD terminal pump Nd:YVO4/KTP yellow light laser

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

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 Nd:YVO4/KTP yellow light laser

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] As shown in Figure 1, the device of the present invention includes a laser diode LD end pump source 1, an optical fiber 2, a coupling lens 3, a resonant cavity, and a c-cut neodymium-doped yttrium vanadate Nd:YVO 4 Crystal 5, acousto-optic Q-switching device 6 and potassium titanyl phosphate KTP crystal 7; the pumping light emitted by the LD end pump source 1 enters the resonant cavity through the optical fiber 2 and the coupling lens 3, which is characterized in that the resonant cavity is formed by the rear cavity The mirror 4 and the output mirror 8 are composed of the rear cavity mirror 4 at the front end and the output mirror 8 at the rear end. C-cut neodymium-doped yttrium vanadate Nd:YVO is placed in the resonant cavity in sequence 4 Crystal 5, acousto-optic Q-switching device 6 and potassium titanyl phosphate KTP crystal 7; the outside of the above-mentioned crystals are surrounded by metal blocks with through holes and pipes, the crystal is placed in the through...

Embodiment 2

[0029] Same as embodiment 1, only the RF wave modulation frequency of the described acousto-optic Q-switching device 6 is 15KHz; c-cut neodymium-doped yttrium vanadate Nd:YVO 4 The doping concentration of the crystal 5 is 0.5%, and the curvature radius of the rear cavity mirror 4 is 1000mm.

[0030] Laser working process: LD end pump source 1 emits 808nm pump light through fiber 2 and coupling lens 3 into c-cut neodymium-doped yttrium vanadate Nd:YVO 4Crystal 5, when the Q-switching switch of the acousto-optic Q-switching 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 converted into 1066.7nm fundamental frequency light; the fundamental frequency light with higher peak power is converted into 1178.7nm Raman light due to the effect of stimulated Raman scattering; the Raman light is finally converted into 589nm yellow light by the frequency doubl...

Embodiment 3

[0032] Same as embodiment 1, only the radio frequency wave modulation frequency of described acousto-optic Q-switching device 6 is 25KHz; c-cut neodymium-doped yttrium vanadate Nd:YVO 4 The doping concentration of the crystal 5 is 0.6%, and the curvature radius of the rear cavity mirror 4 is 1000mm.

[0033] Laser working process: LD end pump source 1 emits 808nm pump light through fiber 2 and coupling lens 3 into c-cut neodymium-doped yttrium vanadate Nd:YVO 4 Crystal 5, when the Q-switching switch of the acousto-optic Q-switching 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 converted into 1066.7nm fundamental frequency light; the fundamental frequency light with higher peak power is converted into 1178.7nm Raman light due to the effect of stimulated Raman scattering; the Raman light is finally converted into 589nm yellow light by the frequ...

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Abstract

The invention relates to a LD end-pumped Nd: YVO4KTP yellow Laser, belonging to the solid laser field. The invention utilizes a LD end-pumped c-cut Nd: YVO4 doped to generate a Raman laser from a Raman crystal, the Raman laser carries out the intra-cavity double frequency by a double frequency crystal KTP and finally the yellow laser is generated. The invention is characterized in that the Laser adopts the c-cut Nd: YVO4 doped from the Raman crystal as a laser media and a Raman medium as well. The yellow Laser has the advantages of the small volume, stable performance, high power, lower cost, etc., thereby having wide practicality.

Description

(1) Technical field [0001] The invention relates to a solid-state laser, in particular to an LD end pump Nd:YVO 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 single ...

Claims

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Application Information

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