Stress-optic measurements of Nd- and Er-doped SCHOTT laser glasses were made at 1064 and 1550 nm, close to their respective lasing wavelengths. In addition, measurements of fused silica at 1064 nm serve as a useful benchmark owing to the existence of multiple studies which report on this material, including several from NBS/NIST. Owing to a currently unexplained discrepancy amongst our fused silica data using three different IR cameras, the results reported herein must be considered preliminary. Nevertheless, we believe the general trends reported herein for thermal lensing will hold, owing to a comparable increase in magnitude of the individual stress-optic parameters Kpar and Kperp with increasing wavelength as previously observed for fused silica and as seen in our current data.
Mark J. Davis and Joseph S. Hayden, "Stress-optic measurements of SCHOTT laser glass," Proc. SPIE 10896, Solid State Lasers XXVIII: Technology and Devices, 108961E (Presented at SPIE LASE: February 07, 2019; Published: 7 March 2019); https://doi.org/10.1117/12.2510780.
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