Thermal lensing and stress in Cr,Er:YSGG

William A. Gollihar; Satrijo T. Margo; Larry G. DeShazer; Chandler J. Kennedy

doi:10.1117/12.207001

17 April 1995 Thermal lensing and stress in Cr,Er:YSGG

William A. Gollihar, Satrijo T. Margo, Larry G. DeShazer, Chandler J. Kennedy

Proceedings Volume 2375, Beam Control, Diagnostics, Standards, and Propagation; (1995) https://doi.org/10.1117/12.207001
Event: Photonics West '95, 1995, San Jose, CA, United States

Abstract

Thermal and stress lensing effects have been measured in a Cr,Er:YSGG rod by observing a transmitted 1064 nm Nd:YAG beam diverging from an operating Cr,Er:YSGG laser. The results compare favorably with theory and estimated thermal-optic properties of YSGG, which is intermediate between YAG and GSGG. Numerical simulations of the laser agree substantially with the threshold and power observed and show a heat generation rate which is consistent with our observations of lensing. Thermal fracture of the rod has been observed on several occasions, leading to an estimate of the thermal fracture figure of merit which is also intermediate between YAG and GSGG. Back focal distances of less than 20 cm occur in the vicinity of half the thermal rupture limit.

Citation Download Citation

William A. Gollihar, Satrijo T. Margo, Larry G. DeShazer, and Chandler J. Kennedy "Thermal lensing and stress in Cr,Er:YSGG", Proc. SPIE 2375, Beam Control, Diagnostics, Standards, and Propagation, (17 April 1995); https://doi.org/10.1117/12.207001

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