Double-wavelength quick-switching Q-switched laser device

Abstract

The invention discloses a double-wavelength quick-switching Q-switched laser device used for switching and outputting 1.06-micron laser and 1.57-micron laser. The laser device comprises two laser output optical paths; the two laser output optical paths share a high-reflectivity mirror, a pump head and a polarizer. Two optical paths are subjected to optical path separation in a transmission direction and a reflection direction of the polarizer. In the transmission optical path of the polarizer, a first Q switch and a first output mirror are arranged sequentially to form the output optical path of the 1.06-micron laser. In the reflection optical path of the polarizer, a turning mirror, a second Q switch, a dichroic mirror, an optical parametric oscillator crystal and a second output mirror are arranged sequentially to form the output optical path of the 1.57-micron laser. The selective output of the 1.06-micron laser and the 1.57-micron laser is realized by respectively applying a Q-switched voltage to the two Q switches. The double-wavelength quick-switching Q-switched laser device disclosed by the invention is quick and reliable to switch, has a simple structure and is convenient to use.

Description

technical field [0001] The invention belongs to the technical field of laser devices, in particular to a dual-wavelength fast switching Q-switched laser. Used in dual-wavelength laser ranging equipment, selectively provide 1.57μm and 1.06μm two wavelength ranging pulsed laser sources. Background technique [0002] High-performance ranging equipment requires a dual-wavelength laser ranging function. Use a laser with a wavelength of 1.57 μm in an environment that requires personal safety to ensure that it does not cause damage to the eyes; use a wavelength with higher pulse energy when measuring distances for weak and small targets. 1.06μm laser to ensure better ranging performance. [0003] The principle of 1.57μm / 1.06μm dual-wavelength switching laser is to use Nd:YAG resonator to generate 1.06μm laser output, and to achieve 1.57μm laser output by inserting an optical parametric oscillator inside or outside the cavity. There are two types of existing dual-wavelength switch...

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Problems solved by technology

[0004] In order to overcome the disadvantages of the poor reliability and slow switching speed of the dual-wavelength switching laser using the electric servo transmission mechanism and the complex system and low nonlinear conversion efficiency of the dual-wavelength switching laser using the extracavity ring optical parametric oscillator, the present invention proposes a Dual wavelength fast switching Q-switched laser

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