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Device and method for outputting solid-state sum-frequency spectrum-continuous laser light for sodium guide stars

A laser output device and sodium guide star technology, which is applied in the field of laser and astronomical adaptive optics, can solve the problems of fluorescence light return efficiency restriction and low light return efficiency, and achieve small size, simple and compact device, and high-efficiency sodium guide star return light effect

Active Publication Date: 2018-06-01
INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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  • Abstract
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Problems solved by technology

However, in practical applications, due to the influence of the discrete longitudinal mode spectral characteristics of traditional lasers, the high-power narrow-linewidth sodium guide star laser can only resonate and excite a small part of the atmospheric sodium atoms at a rate, and the resulting fluorescence light return efficiency is still saturated. Effect restriction, low light return efficiency

Method used

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  • Device and method for outputting solid-state sum-frequency spectrum-continuous laser light for sodium guide stars

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Effect test

Embodiment 1

[0026] Such as figure 1 As shown, a solid and frequency sodium guide star spectrum continuous laser output device, including a solid 1064nm fundamental frequency laser 1 parallel to the fundamental frequency laser output direction, a solid 1319nm fundamental frequency laser 2, a plane high reflection mirror 3, a beam combining mirror 4, A converging ball lens 5 , a sum frequency crystal 6 , a collimating ball lens 7 and a beam splitter 8 . Among them, solid 1064nm fundamental frequency laser 1 is used to output 1064nm fundamental frequency laser, solid 1319nm fundamental frequency laser 2 is used to output 1319nm fundamental frequency laser, and at the same time, solid 1064nm fundamental frequency laser 1 and / or solid 1319nm fundamental frequency laser 2 output acousto-optic Frequency-shifted feedback spectral continuous laser, that is to say, at least one of the 1064nm fundamental frequency laser and the 1319nm fundamental frequency laser is an acousto-optic frequency-shifted...

Embodiment 2

[0036] The same part of this embodiment and Embodiment 1 will not be described again, the difference is:

[0037] The solid-state 1064nm fundamental-frequency laser is a Nd:YAG quasi-continuous 100μs long-pulse spectral continuous laser with a linewidth of 3pm, and the solid-state 1319nm fundamental-frequency laser is a traditional Nd:YAG quasi-continuous multi-longitudinal mode laser with a linewidth of 3pm and a plane height of The incident angles of mirror 3, beam combiner 4 and beam splitter 8 are all 45°, converging ball lens 5 and collimating ball lens 7 are plano-convex lenses with a focal length of 300mm, and frequency crystal 6 is a KTP nonlinear crystal with a size of 3mm ×3mm×20mm, the cutting angle of the end face is 2°, and the output 589nm sum-frequency laser 9 is a spectrum continuous laser.

Embodiment 3

[0039] The same part of this embodiment and embodiment two will not be repeated, the difference is:

[0040] The solid 1064nm fundamental frequency laser and the solid 1319nm fundamental frequency laser are both Nd:YAG quasi-continuous 100μs long pulse spectral continuous lasers with a line width of 3pm, and the output 589nm sum frequency laser 9 is spectral continuous laser.

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Abstract

The invention relates to a device and a method for outputting solid-state sum-frequency spectrum-continuous laser light for sodium guide stars, and belongs to the technical field of laser light and astronomy adaptive optics. The device comprises a solid-state 1064nm fundamental-frequency laser device, a solid-state 1319nm fundamental-frequency laser device, a plane high-reflectivity mirror, a beamcombiner, a converging ball lens, a sum-frequency crystal, a collimating ball lens and a beam splitter. The device and the method have the advantages that 589nm sum-frequency laser light can be generated by nonlinear sum frequencies of the solid-state 1064nm fundamental-frequency laser device and the solid-state 1319nm fundamental-frequency laser device, acousto-optic frequency-shifted feedback spectrum-continuous laser light can be simultaneously outputted by at least one of the solid-state 1064nm fundamental-frequency laser device and the solid-state 1319nm fundamental-frequency laser device, accordingly, the 589nm sum-frequency laser light can be driven to become spectrum-continuous sum-frequency laser light, atmosphere sodium atoms at all rates can be sufficiently excited and utilized, high-brightness and efficient sodium guide star return light can be implemented, and requirements of astronomy adaptive optics and application such as white light atom cooling and gas detection canbe met; the integral device is simple, compact and small and is convenient to maintain.

Description

technical field [0001] The invention belongs to the technical field of laser and astronomical adaptive optics, and in particular relates to a solid and frequency sodium guide star spectrum continuous laser output device and an output method. Background technique [0002] With the development of laser technology, since the 1980s, the world's ground-based astronomical telescopes have entered the era of adaptive optics telescopes. The adaptive optics correction of the telescope needs to use the bright star near the observation target as the guide star to obtain the wavefront distortion information caused by the atmosphere, and then control the deformable mirror to compensate the wavefront distortion through real-time feedback, so as to realize the observation of the target near the guide star. high-resolution imaging. The laser guide star technology was first proposed by the United States, that is, the use of high-power lasers to generate high-brightness artificial guide stars...

Claims

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Application Information

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IPC IPC(8): G02F1/35G02F1/355G02B27/10
CPCG02B27/1006G02F1/3501G02F1/353G02F1/3551G02F1/3503G02F1/3528
Inventor 陈小明张雷鲁燕华许夏飞任怀瑾胡浩童立新庞毓万敏石勇刘芳
Owner INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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