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Proceedings Paper

Thermo-optical properties of Alexandrite laser crystal
Author(s): Pavel Loiko; Shirin Ghanbari; Vladimir Matrosov; Konstantin Yumashev; Arkady Major
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Paper Abstract

Alexandrite is a well-known material for broadly tunable and power-scalable near-IR lasers. We measured the thermal coefficients of the optical path (TCOP) and thermo-optic coefficients (TOCs) of Alexandrite at 632.8 nm for three principal light polarizations, E || a, E || b and E || c. All TOCs are positive and show a notable polarization-anisotropy, dna/dT = 5.5, dnb/dT = 7.0 and dnc/dT = 14.9×10-6 K-1. We also characterized thermal lensing in a continuous-wave Alexandrite laser which used a Brewster-oriented c-cut 0.16 at.% Cr3+ doped BeAl2O4 crystal pumped at 532 nm and emitted at 750.9 nm (E || b). The measured thermal lens was positive and astigmatic. The sensitivity factors of the thermal lens (Mx,y = dDx,y/dPabs) were found to be Mx = 1.74 and My = 2.38 [m-1/W].

Paper Details

Date Published: 15 February 2018
PDF: 7 pages
Proc. SPIE 10511, Solid State Lasers XXVII: Technology and Devices, 105111U (15 February 2018); doi: 10.1117/12.2289071
Show Author Affiliations
Pavel Loiko, ITMO Univ. (Russian Federation)
Shirin Ghanbari, Univ. of Manitoba (Canada)
Vladimir Matrosov, Solix Ltd. (Belarus)
Konstantin Yumashev, Belarusian National Technical Univ. (Belarus)
Arkady Major, Univ. of Manitoba (Canada)

Published in SPIE Proceedings Vol. 10511:
Solid State Lasers XXVII: Technology and Devices
W. Andrew Clarkson; Ramesh K. Shori, Editor(s)

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