Temperature influence on spectroscopic and lasing properties of blue laser diode pumped Alexandrite crystal

Martin Fibrich; Jan Šulc; David Vyhlídal; Helena Jelínková; Miroslav Čech

doi:10.1117/12.2287787

15 February 2018 Temperature influence on spectroscopic and lasing properties of blue laser diode pumped Alexandrite crystal

Martin Fibrich, Jan Šulc, David Vyhlídal, Helena Jelínková, Miroslav Čech

Author Affiliations +

Proceedings Volume 10511, Solid State Lasers XXVII: Technology and Devices; 1051122 (2018) https://doi.org/10.1117/12.2287787
Event: SPIE LASE, 2018, San Francisco, California, United States

Abstract

We report on influence of temperature on spectroscopic and lasing properties of Alexandrite (^Cr3+:BeAl₂O₄) crystal. Fluorescence lifetime, polarization-resolved absorption and emission spectra, and laser characteristics at ∼750 nm are described in detail within the 78-400K temperature range. As a pumping source, 3.5W InGaN blue laser-diode operating at 444nm wavelength was used. The best results achieved were at ∼353K crystal temperature — 326mW of continuous output power at 750nm wavelength with the slope efficiency near 20% (related to absorbed pump power). At cryogenic temperatures, the Alexandrite laser generation at the so-called R-line, i.e not in the vibronic mode, has been observed.

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Martin Fibrich, Jan Šulc, David Vyhlídal, Helena Jelínková, and Miroslav Čech "Temperature influence on spectroscopic and lasing properties of blue laser diode pumped Alexandrite crystal", Proc. SPIE 10511, Solid State Lasers XXVII: Technology and Devices, 1051122 (15 February 2018); https://doi.org/10.1117/12.2287787

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