Solid laser source applicable to generation of polychromatic sodium guide star

A solid-state laser and sodium guide star technology, applied in the laser field, can solve the problems of low technical complexity, high technical difficulty, and complex system structure of laser sources

Active Publication Date: 2017-01-04
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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Problems solved by technology

Some people also listed the advantages and disadvantages of the two schemes. Among them, the disadvantages of two-photon excitation: two high-power and narrow-linewidth laser sources of 569&589nm are required, the technology is difficult, and the system structure is complex; the advantages of single-photon excitation: laser source The te

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  • Solid laser source applicable to generation of polychromatic sodium guide star
  • Solid laser source applicable to generation of polychromatic sodium guide star
  • Solid laser source applicable to generation of polychromatic sodium guide star

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[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present disclosure.

[0034] The invention provides a solid-state laser source suitable for producing polychromatic sodium guide stars, such as figure 2As shown, the device includes: a semiconductor pumping light source, a laser oscillator connected to the pumping double rods of the semiconductor pumping light source, a frequency doubling module connected to the output end of the laser oscillator, and an output end of the frequency doubling module A connected qua...

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Abstract

The present invention relates to a solid laser source applicable to the generation of a polychromatic sodium guide star. The device comprises a semiconductor pump light source, a laser oscillator, a second harmonic generation module and a fourth harmonic generation module; the semiconductor pump light source is used for emitting pump light; the pump light is pulsed light; the repetition frequency of the pulsed light ranges from 200 Hz to 1 KHz; the pulse width of the pulsed light ranges from 80 microseconds to 300 microseconds; the laser oscillator is used for oscillating the pump light emitted from the semiconductor pump light source to generate laser of a first wavelength; the second harmonic generation module is used for converting the laser of the first wavelength into laser of a second wavelength, wherein the second wavelength is smaller than the first wavelength and is larger than 330 nm; and the fourth harmonic generation module is used for converting the laser of the second wavelength into 330-nm laser. Since the front part of a single output pulse has high peak power, a nonlinear attenuation effect appears in atmospheric transmission, and as a result, attenuation of the 330-nm laser caused by atmosphere is weakened; and the rear part of the single output pulse has proper average power which is matched with sodium atom density in the sodium layer of the atmosphere, and a large number of photon echoes can be generated.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a solid-state laser source suitable for producing polychromatic sodium guide stars. Background technique [0002] When large ground-based telescopes observe space objects such as celestial bodies, disturbances such as atmospheric turbulence will greatly reduce the imaging resolution. Adaptive optics can be used to correct for these perturbations, allowing the telescope to achieve near-diffraction-limited resolution. Adaptive optics correction requires a guide star (called a beacon), and the wavefront of the light signal emitted by it is used as a standard, and the error signal is obtained by measuring the phase distortion of the wavefront through the atmosphere, so as to realize the imaging of the observation target Correction. The 589nm laser is currently the most commonly used monochromatic sodium beacon laser source in the world. Compared with monochromatic beacon guide star...

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Application Information

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IPC IPC(8): H01S3/109H01S3/0933H01S3/10
CPCH01S3/0933H01S3/10H01S3/109
Inventor 宗楠薄勇彭钦军申玉
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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