589 nm laser based on raman frequency conversion and laser sum frequency

A 589nm, laser technology, used in lasers, laser parts, phonon exciters, etc., can solve the problems of high cost and complex structure of output sodium yellow light, and achieve the effect of simple structure, easy integration, and easy control of optical characteristics

Active Publication Date: 2017-05-31
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 Raman frequency conversion and laser sum frequency in order to solve the problems of complex structure and high cost in the prior art sodium yellow light output technology

Method used

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  • 589 nm laser based on raman frequency conversion and laser sum frequency
  • 589 nm laser based on raman frequency conversion and laser sum frequency

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Embodiment 1

[0030] see figure 1 , figure 1 It is a structural schematic diagram of Embodiment 1 of a 589nm laser based on Raman frequency conversion and laser sum frequency in the present invention. As shown in the figure, the 589nm laser based on Raman frequency conversion and laser sum frequency in the present invention includes a 1064nm laser source 1 and a Faraday isolator 2 , one-half glass slide 3, light splitting element 4, front cavity mirror 5 of the first Raman resonant cavity, KGW crystal 6, rear cavity mirror 7 of the first Raman resonant cavity, first filter lens 8, first reflector Mirror 10, the front cavity mirror 11 of the second Raman resonator, the BN crystal 12, the rear cavity mirror 13 of the second Raman resonator, the second filter mirror 15, the second reflection mirror 18, the nonlinear crystal 19 and the third filter lens 21, the laser beam emitted by the 1064nm laser source 1 passes through the Faraday isolator 2 and the half glass slide 3 in turn, and is divid...

Embodiment 2

[0034] The structure of Embodiment 2 differs from Embodiment 1 in that the beam splitter 4 is replaced by a polarization beam splitter prism, the nonlinear crystal 19 is a KDP crystal, and the cutting angle is 58.5°. Since the 1159nm laser 16 and the 1197.8nm laser 14 have different polarization states, they satisfy the type II phase matching condition.

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Abstract

Provided is a 589 nm laser based on raman frequency conversion and laser sum frequency. The 589 nm laser based on the raman frequency conversion and the laser sum frequency is composed of a 1064 nm laser source, a faraday isolator, a half slide, a beam split element, a front cavity mirror of a first raman resonant cavity, a tungstic acid gadolinium potassium crystal, a rear cavity mirror of the first raman resonant cavity, a first filtering lens, a first reflecting mirror, a front cavity mirror of a second raman resonant cavity, a barium nitrate crystal, a rear cavity mirror of the second raman resonant cavity, a second filtering lens, a second reflecting mirror, a nonlinear crystal and a third filtering lens. According to the 589 nm laser based on the raman frequency conversion and the laser sum frequency, the structure is simple, synchronization is easy to realize, the obtained 589 nm can be used for generating sodium guide stars, and the 589 nm laser based on the raman frequency and the laser sum frequency has an important significance in fields of astronomy, national defense and the like.

Description

technical field [0001] The invention belongs to the technical field of solid lasers, in particular to a 589nm laser based on Raman frequency conversion and laser sum frequency. Background technique [0002] When large-scale telescopes observe celestial bodies, due to disturbances such as atmospheric turbulence, the resolution of imaging is greatly reduced. These influencing factors can be corrected through adaptive technology, thereby improving the resolution of imaging. When correcting with adaptive optics, a guide star, also known as a beacon, is required to generate a strong light source at a certain height from the ground, and use the light signal of the guide star as a wavefront standard to measure the phase distortion produced by the atmosphere Signal to obtain the error signal, so as to achieve adaptive correction. As an artificial beacon, the sodium beacon is produced by lasers used to excite sodium atoms in the atmospheric ionosphere at an altitude of 80-100 km, ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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