Diamond Raman laser in eye safe region

Helena Jelinková; Ondřej Kitzler; Michal Jelínek; Jan Šulc; Michal Němec; Václav Kubeček

doi:10.1117/12.910956

11 October 2011 Diamond Raman laser in eye safe region

Helena Jelinková, Ondřej Kitzler, Michal Jelínek, Jan Šulc, Michal Němec, Václav Kubeček

Proceedings Volume 8306, Photonics, Devices, and Systems V; 83060G (2011) https://doi.org/10.1117/12.910956
Event: Photonics Prague 2011, 2011, Prague, Czech Republic

Abstract

The goal of this work was the external cavity CVD diamond Raman laser generating at wavelength of 1.63 μm which belongs to an eye safe region. As the Raman medium a sample of CVD grown single diamond crystal was used. The crystal was grown in the [100] direction and after cutting, the sample sides were formed by {110} planes. The diamond crystal sample dimensions were 5 mm × 5 mm × 2 mm and it had no anti-reflection coatings. As a pumping radiation source the compact Q-switched Nd:YAP laser operating at the wavelength 1.34 μm was used. The pulse duration was 12 ns. This pumping radiation was focused by the lens (f = 250 mm) perpendicularly on the diamond crystal face. The beam radius inside the crystal was 180 μm. The 15 mm long Raman laser resonator was formed by a pumping mirror (HR @ 1.63 μm and T = 97 % @ 1.34 μm) and an output coupler (R = 95 % @ 1.63 μm, r = 500 mm). The maximum generated laser output energy was 18 μJ @ 1.63 μm for the pumping energy of 3.35 mJ corresponding to the conversion efficiency of 0.5 %. The output spatial beam profile corresponds to the fundamental Gaussian beam in both axes.

Citation Download Citation

Helena Jelinková, Ondřej Kitzler, Michal Jelínek, Jan Šulc, Michal Němec, and Václav Kubeček "Diamond Raman laser in eye safe region", Proc. SPIE 8306, Photonics, Devices, and Systems V, 83060G (11 October 2011); https://doi.org/10.1117/12.910956

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