Grating-selected quick tuning laser resonant cavity

Abstract

The invention is of a grating election rapid tunable laser resonator, involving laser technology, the laser resonator with servo-motor-driven rotary turntable grating and accurate positioning and achieve grating election of the rapid line tunable lasers. The laser resonator cavity of the laser output mirror, grating, grating turntable, the servo motor, servo motor drive modules and control modules and other components, which is part of the output mirror reflection of the transmission type spherical mirror or plane mirror, grating for the plane or spherical reflecting diffraction grating. Total output mirror and a grating optical axis, and the normal and the optical axis grating into the quasi-rectangular. This invention achieved a grating election rapid tuning of the laser output, tuning speed, tuning range, high precision tuning advantages. Apply to pulse CO2 laser pulse CO laser, pulsed HF / DF and other tunable laser pulse laser, laser atmospheric detection, laser chemistry, laser processing, and other fields have a broad application prospects.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a grating-selected and tunable laser resonator that can realize fast tuning. Background technique [0002] With the development of modern industry, air pollution has become more and more serious. Due to the characteristics of laser such as good monochromaticity, good coherence, high directivity, high brightness and high power, Differential Absorption Lidar (DIAL) is an effective method for remote detection of trace toxic and polluting gases in the atmosphere. tool. Tunable pulsed laser has good wavelength tunability, and there are many kinds of atmospheric pollutants. Many substances in the spectral region of tunable pulsed laser have strong absorption peaks. Therefore, tunable pulsed laser is an ideal light source for laser differential absorption radar. However, in order to be able to emit two laser beams with different wavelengths during the "freezing" time of the atmosphere ...

AI Technical Summary

Problems solved by technology

Although these methods can achieve fast tuning, they have many disadvantages such as high cost, poor anti-electromagnetic interference ability, difficult control, inability to realize closed-loop control, poor positioning accuracy, unsatisfactory reproducibility, and low stability.

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