Dual wavelength synthetic pumping compact type laser system

Abstract

The invention relates to all-solid-state laser application technology field, in particular relates to a double-wavelength comprehensive pumped compact laser system. To provide an all-solid-state laser with lower heat quality, high efficiency, high beam quality and more stabile operation characteristic, the invention provides a technical scheme that the double-wavelength comprehensive pumped compact laser system is used as a cavity mirror of pumped source double-wavelength laser projected to a laser resonant cavity via focusing lens, a laser gain medium is set between the cavity mirror and another cavity mirror of the laser resonant cavity, another cavity mirror outputs laser, oscillation beam waist radius of laser resonant cavity equals to or slightly larger than pumped beam waist radius. The system provided by the invention is main used for manufacturing laser with high power, all-solid, compact structure, small volume, lower power dissipation and low cost.

Description

technical field [0001] The invention relates to the technical field of all-solid-state laser applications, in particular to a high-power, low-calorie, high-beam-quality, high-brightness, high-efficiency, all-solid-state compact laser system. Specifically, the present invention relates to a dual-wavelength integrated pump compact laser system . technical background [0002] For the DPSSL (Diode Pump All-Solid-State Laser diode laser pumped all-solid-state laser) laser system, a lot of heat will always be generated in the laser gain medium during the pumping and excitation process, which is mainly caused by two It is formed by the basic physical process: it is the photon energy difference between the pump light and the oscillating light, that is, the Stokes shift (Stokesshift), and the coupling between the laser pump energy level and the laser upper energy level, that is, the quantum Efficiency (quantum efficiency). A series of thermal effects (including thermal lens, therma...

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Problems solved by technology

However, due to the small absorption coefficient of the laser gain medium for this pumping method, the laser cannot make full use of the pump light, which reduces the overall light-to-light conversion efficiency of the laser, and because a large number of pumps that are not absorbed by the laser gain medium Pu light and oscillating light are mixed together to output together, which increases the difficulty of identifying and extracting the required output laser

At the same time, as far as the current technical level in the laser field is concerned, if you want to continue to improve the overall light-to-light conversion efficiency of the laser based on this pumping method, you can only use the following two methods: One is to increase the amount of light that is not absorbed by the laser crystal. The feedback system of the lost pump light makes the pump light reused, but this method complicates the laser system and increases the unfavorable factors for the stable operation of the laser; the second is to increase the doping concentration of the laser gain medium, but this is another Limited by the crystal growth method and doping process conditions, it is more complicated for practical use

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