Light source suitable for sodium laser guide star

A laser guide star and light source technology, applied in the field of lasers, can solve problems such as complex frequency and line width control systems, and achieve high output power, avoid gas emissions, and good beam quality

Inactive Publication Date: 2013-09-25
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a light source suitable for sodium laser guide stars, which solves the short

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  • Light source suitable for sodium laser guide star
  • Light source suitable for sodium laser guide star

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[0026] The present invention will be further described below in conjunction with the drawings and specific embodiments of the specification.

[0027] Such as figure 1 As shown, a light source suitable for a sodium laser guide star according to the present invention includes a pump source 1, a resonant cavity 2 and a gas working chamber 3 containing a gain medium.

[0028] In the present invention, the gain medium is composed of sodium atom gas 33 and inert gas 34. The inert gas may be helium, neon, argon, krypton or xenon. The inert gas in this embodiment is xenon. Xenon 3 content is 10 18 Per cubic centimeter; sodium atom content is 10 12 Per cubic centimeter. The mixed gas composed of sodium atom gas and xenon gas has an absorption peak at 566nm. The line width of the absorption peak is on the order of nm.

[0029] In the present invention, the pump source can select a suitable laser according to different inert gases in the gain medium and the needs of pump intensity. The pump...

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Abstract

The invention belongs to the technical field of a laser and discloses a light source suitable for sodium laser guide star. The light source comprises a pump source used for generating pump light, a gas workroom containing a gain medium and a resonant cavity. The gain medium is a mixed gas formed by a sodium atomic gas and an inert gas together. An excimer formed by the mixed gas is provided with a resonance absorption peak at 589nm and an absorption satellite peak with a wavelength less than 589nm. The wavelength of the pump light is aligned with the absorption satellite peak and pumps the sodium atom and inert gases to a high energy state, and then a sodium atom with the high energy state is generated through decomposition. Under the effect of the resonant cavity, when the sodium atom with high energy state jumps to a ground state, 589nm laser is irradiated. The laser is aligned with a resonant absorption peak of the atomic sodium, and a light source is provided for the sodium laser guide star. According to the light source, there is no complex frequency locking and linewidth control systems, the structure is simple, and the working medium has the advantages of long service life and recycling.

Description

technical field [0001] The invention belongs to the technical field of lasers, in particular to a guide star light source suitable for sodium lasers. Background technique [0002] When the light beam is transmitted in the atmosphere, due to the influence of atmospheric turbulence, the wavefront of the light beam will be distorted, and the impact on astronomical observation is manifested in the decrease of image resolution and the blurring of the observation target. At present, in order to improve the resolution of space target observation, adaptive optics based on artificial guide star technology has been paid more and more attention by researchers. The working principle of the sodium laser guide star adaptive optics system is: use the light emitted by the sodium laser guide star light source to pump the sodium atoms in the sodium layer at a distance of 80 to 120 kilometers from the ground to an excited state, and then emit the sodium atoms spontaneously. The light is the b...

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Application Information

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IPC IPC(8): H01S5/04H01S5/024H01S5/06H01S5/30
Inventor 王红岩李礼航宁禹岳德胜杨子宁华卫红李文煜许晓军
Owner NAT UNIV OF DEFENSE TECH
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