Blowing device for optical cavity output window of high power gas laser

Abstract

The invention relates to a blower of a high-power gas laser optical resonator output window, which includes a gas inlet passage, a blowing nozzle and a gas guide shell. The gas inlet passage extends inwards from the outer surface of an output reflector base; the inlet of the blowing nozzle is communicated with the outlet of the gas inlet passage, and the outlet of the blowing nozzle points to thefilming surface of an output mirror or an output reflector; and one end of the gas guide shell is fixedly connected with the output reflector base, while the other end is introduced into a sealed gascirculation annular laser cavity of the laser. The blower of the invention is combined with the output reflector base into a whole, the size is small, the structure is compact, the output mirror or the output reflector of the high-power gas laser optical resonator output window can be cooled down, and the service life of the surface filming layer of the output mirror or the output reflector is prolonged, so that a high-power gas laser equipment system can work for a long time stably and reliably, and the invention is applicable to various high-power gas lasers and pulsed gas lasers.

Description

technical field [0001] The invention relates to a high-power gas laser, in particular to a blowing device for the output window of the optical resonant cavity of the high-power gas laser. Background technique [0002] Usually, the output mirror or output mirror of the output window of the gas laser adopts the uncooled or water circulation cooling output window technology in the case of low laser power (several watts or tens of watts), because the output energy of a single pulse of a low laser power laser is only At the level of millijoules (MJ) or several joules (J), the energy of the laser beam will not cause significant damage to the coating (destruction threshold per unit area) of the laser output mirror or output mirror. The laser can work stably and reliably for a long time. However, in the case of high-power gas lasers (several kilowatts or tens of thousands of watts), the output energy of a single pulse of the laser can reach tens of joules (J) to hundreds of joules ...

AI Technical Summary

Problems solved by technology

However, in the case of high-power gas lasers (several kilowatts or tens of thousands of watts), the output energy of a single pulse of the laser can reach tens of joules (J) to hundreds of joules (J) or even higher, and the high repetition frequency pulse can reach hundreds of Hz or thousands of Hz, the photon energy of the laser beam acts on the output mirror or the output mirror coating of the output window of the laser, which will quickly ablate and destroy the coating of the lens, so that it is impossible for the high-power gas laser to be stable and reliable for a long time. Time running work, which is a key technical problem that is difficult to solve in the technology of high-power gas lasers (especially pulsed gas lasers)

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