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Waveguide CW 118.6 μm H2O laser

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Abstract

This paper reports results of an experimental study of a cw 118.6 μm H2O waveguide laser. The laser cavity is a 3 cm inner diameter, 3.2 m long Pyrex tube, with plane reflectors against its ends, one of them being a copper mesh coupler. The active medium is a H2O:H2 gas mixture. Successive optimizations lead to a reliable output power of 50 mW, for the EH11 mode. The power density is the highest ever reported, and the stability is such that the power drifts by less than 2% per hour. This laser is competitive with the optically pumped 118.8 μm CH3OH laser.

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Belland, P. Waveguide CW 118.6 μm H2O laser. Appl. Phys. B 27, 123–128 (1982). https://doi.org/10.1007/BF00694636

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