High-power laser frequency-doubling Q-switching device

Abstract

The invention discloses a high-power laser frequency-doubling Q-switching device which comprises a linear-polarization photoelectric Q-switching laser generator, at least two beam-split frequency-doubling devices and a beam combiner group. Each beam-split frequency-doubling device comprises a beam-split lens, a one second wave plate or one fourth wave plate, a frequency-doubling crystal, an optical filter with high reflectivity to fundamental frequency light and high transmittance to frequency-doubled light, a beam expander lens group, a diaphragm and a frequency-doubled light fully-reflected lens, which are sequentially arranged along a beam split path. Each beam-split lens in each beam-split frequency-doubling device is arranged on the laser emitting path of the linear-polarization photoelectric Q-switching laser generator, each emitting path of each fully-reflected lens in each beam-split frequency-doubling device corresponds to the beam combiner group, and outputs multi-paths of lasers output by at least two beam-split frequency-doubling devices via the beam combiner group in a beam-combining manner, and requirements to the size and quality of the frequency-doubling crystals are effectively lowered.

Description

technical field [0001] The invention relates to a laser device, in particular to a high-energy laser device. Background technique [0002] Titanium-doped sapphire laser, referred to as Ti:sapphire laser, has a wide range of uses in medicine and scientific research because of its continuously adjustable output laser wavelength within a large range (660nm~1.1μm), and its commonly used pump source is often The 532nm electro-optic Q-switched pulsed laser with relatively mature technology is adopted at present, while the 532nm laser is generally obtained by extracavity frequency doubling of a lamp-pumped Nd:YAG laser. [0003] The 532nm electro-optic Q-switched pulsed laser is often used to pump Ti:Sapphire lasers, and the damage threshold of Ti:Sapphire is low. In order to obtain a larger tuned output laser, it is generally obtained by multi-stage amplification. The pump source A Q-switched 532nm laser with a large single pulse energy is often used, and a spectroscopic mirror w...

AI Technical Summary

Problems solved by technology

[0004] For medicine and scientific research, the high-energy Q-switched 532nm laser used is usually obtained by using a large-spot fundamental-frequency laser through a large-size frequency-doubling crystal and then compressing the beam diameter, but the maximum energy of the high-energy frequency-doubling laser that can be obtained is limited by crystals and crystals. The limitation of the damage threshold of the upper film layer cannot be too high

Images