A 589nm laser based on co-cavity double-Raman medium and laser sum frequency

A 589nm, Raman laser technology, applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of high cost, complex structure of output sodium yellow light, etc., and achieve high output power and output energy, and anti-damage threshold High, easy to integrate effect

Active Publication Date: 2017-04-05
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The present invention proposes a 589nm laser based on a common-cavity dual Raman medium and a laser sum frequency in order to solve the problems of complex structure and high cost in the prior art output sodium yellow light technology

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  • A 589nm laser based on co-cavity double-Raman medium and laser sum frequency
  • A 589nm laser based on co-cavity double-Raman medium and laser sum frequency

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[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] see figure 1 , figure 1 It is a schematic diagram of the structure of the 589nm laser based on the common cavity dual Raman medium and the laser sum frequency of the present invention. As shown in the figure, the 589nm laser based on the common cavity dual Raman medium and the laser sum frequency of the present invention includes a 1064nm laser pump source 1 , one-half slide 2, Faraday isolator 3, Raman laser cavity mirror 4, Raman laser output mirror (7), KGW crystal 5, (BN) crystal 6, first filter mirror 8, reflector 12, KDP crystal 13 and second filter lens 15 . The laser light emitted by the 1064nm laser source 1 passes through the half glass slide 2 and the Faraday isolator 3, and enters the Raman laser cavity through the front cavity mirror 4 of the Raman laser After the 1064nm laser is Raman frequency-shifted by the KGW crystal 5, a laser 10 ...

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Abstract

A 589nm laser based on co-cavity double-Raman medium and laser sum frequency comprises a 1064nm laser source. Along the laser output direction of the 1064nm laser source, there are successively provided a half slide, a Faraday isolator, the front cavity mirror of a Raman laser, potassium gadolinium tungstate crystal (chemical formula: KGa(WO4)2, hereinafter referred to as KGW crystal), barium nitrate crystal (chemical formula: Ba(NO3)2, hereinafter referred to as BN crystal), the rear cavity mirror of the Raman laser, a first filter lens, a reflector, nonlinear crystal and a second filter lens. 1064nm pumping laser is coupled into a Raman laser resonator, 1159nm laser is generated by means of Raman frequency shift of the KGW crystal, the remaining 1064nm pumping laser generates 1197.8nm laser by means of Raman frequency shift of the BN crystal. The 1159nm laser and the 1197.8nm laser generate 589nm laser in the nonlinear crystal through sum frequency. The 589nm laser has the advantages of simple structure and convenient integration, can be used as a laser source for producing an artificial sodium guide star, and has important significance in the aspects of astronomy and national defense.

Description

technical field [0001] The invention belongs to the technical field of solid lasers, in particular to a 589nm laser based on a common cavity double Raman medium and a laser sum frequency. Background technique [0002] The sodium beacon laser is used to excite sodium atoms in the atmospheric ionosphere at an altitude of 80-100km, causing the sodium atoms to resonate and produce backscattered fluorescence, thereby producing a high-brightness sodium guide star. In this way, artificial stars can be substituted for natural forms in those positions of the sky where no natural stars are visible. The laser guide star can be used as a reference index for adaptive optics, so as to obtain the wavefront distortion information generated by the beacon light passing through the atmosphere, and then use adaptive optics technology to correct atmospheric disturbances, which can greatly improve the resolution of optical telescopes, reaching Near the diffraction limit, which is of great signif...

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Application Information

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IPC IPC(8): H01S3/30H01S3/108
CPCH01S3/1086H01S3/30
Inventor 陈俊驰冷雨欣彭宇杰苏泓彭
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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