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

0521865 - FZÚ 2020 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Fibrich, Martin - Šulc, J. - Vyhlídal, D. - Jelínková, H. - Čech, M.
Temperature influence on spectroscopic and lasing properties of blue laser diode pumped Alexandrite crystal.
Solid State Lasers XXVII: Technology and Devices. Bellingham: SPIE, 2018 - (Clarkson, W.; Shori, R.), Roč. 10511 (2018), s. 1-8, č. článku 1051122. Proceedings of SPIE, 10511. ISBN 978-151061507-6. ISSN 0277-786X.
[Solid State Lasers XXVII: Technology and Devices 2018. San Francisco (US), 29.01.2018-01.02.2018]
Institucionální podpora: RVO:68378271
Klíčová slova: Cr³⁺:BeAl₂O₄ * diode pumping * InGaN-laser diode * cryogenic temperature
Obor OECD: Optics (including laser optics and quantum optics)

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.
Trvalý link: http://hdl.handle.net/11104/0306419