Single longitudinal mode and full solid-state bluish violet light laser

Abstract

It is a single-longitudinal model solid purplish blue laser composed of single-longitudinal model exocoel frequency multiplier Nd:YAG laser, plane lens, lambda / 2 quartz wavepad, focus lens, titanium diamond laser. It is characterized by the following: the titanium diamond laser adopts three-lens right angle ring chamber structure composed of high reverse back cavity lens, forty-five degree incidence reflection lens, titanium diamond crystal and output cavity lens. The titanium diamond laser output is divided into two paths, wherein, one goes in through first blind plate and out through frequency crystal, the other one goes in through frequency multiplier crystal and second blind plate and out through frequency crystal.

Description

technical field [0001] The invention belongs to a semiconductor laser pumped all-solid-state laser, in particular to a single longitudinal mode all-solid-state blue-violet laser. Background technique [0002] The all-solid-state laser pumped by laser diode (LD) has high conversion efficiency, compact structure and long life, and has a wide range of applications in many fields. The use of lidar to dynamically monitor changes in urban air pollution is one of its applications. [0003] Laser measurement of air pollution requires wavelength-tunable narrow-linewidth single-longitudinal-mode laser sources. There are many ways to obtain a single longitudinal mode laser output, and the more commonly used ones are tuning mode selection through birefringence filters (Lyot ​​filters), and F-P etalons to narrow the linewidth. The birefringent filter is usually composed of two parts, one is the birefringent crystal wave plate, and the frequency doubling crystal (such as KTP) generally p...

AI Technical Summary

Problems solved by technology

[0004] It can be seen that the ordinary Ti:sapphire laser with single longitudinal mode output adopts a straight cavity structure, and the range of mode selection space is large, which undoubtedly increases the difficulty of mode selection, and there are insertion losses of devices such as birefringent filters and F-P etalons. , affecting the output power

Moreover, the single longitudinal mode output obtained by the above device is not stable, because the birefringent crystal wave plate is very sensitive to temperature changes, so strict temperature control measures must be applied, otherwise it will cause large power fluctuations or even jumps. mode; moreover, this device can only obtain a wavelength light source

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