Sub-100 ps monolithic diamond Raman laser emitting at 573 nm

Nikkinen, Jari and Savitski, Vasili and Reilly, Sean and Dziechciarczyk, Łukasz and Härkönen, Antti and Kemp, Alan and Guina, Mircea (2018) Sub-100 ps monolithic diamond Raman laser emitting at 573 nm. IEEE Photonics Technology Letters, 30 (11). pp. 981-984. ISSN 1041-1135

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    Abstract

    We report a compact and efficient picosecond diamond Raman laser at 573 nm wavelength. The laser consists of a 0.5 mm thick single-crystal synthetic diamond coated to form a plane–plane laser resonator, and pumped at 532 nm by a frequency-doubled Q-switched microchip laser system. The pump delivers 85 ps pulses at 100 kHz repetition rate at a maximum average power of ~500 mW. We demonstrate 1st Stokes emission from the diamond Raman laser with maximum power of 175 mW, corresponding to a conversion efficiency of 47% and a pulse duration of 71 ps. Substantial pulse shortening is obtained by proper adjustment of the pump spot diameter on the diamond sample. A minimum pulse duration of 39 ps is reported for a conversion efficiency of 36% and 150 mW output power. The simplicity of the architecture makes the system highly appealing as a yellow picosecond laser source.