17 January 2011 Temperature distribution and thermal lensing in a flash lamp pumped Nd:YAG laser
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Proceedings Volume 7747, 16th International School on Quantum Electronics: Laser Physics and Applications; 77471A (2011) https://doi.org/10.1117/12.882035
Event: XVI International School on Quantum Electronics: Laser Physics and Applications, 2010, Nessebar, Bulgaria
Abstract
The effect of thermal lensing is a critical factor for resonator design and must be considered to improve the beam quality. The absorption of the pump radiation by laser material and surface cooling leads to a nonuniform temperature distribution in the rod. In this letter the temperature distribution in a cylindrical Nd:YAG rod under repetitive flash lamp pulses is numerically simulated, when pumped by flash lamp with 150 μs pulse width and 10 Hz repetition rate . We consider Gaussian pump pulse shape in time and redial absorption in laser rod. Our calculations show that the temperature converges to a finite value and doses evolve in time noticeably. Also by computing the changes of refraction index, we obtain the focal length of the heat dispersion.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. Keshavarz, A. Keshavarz, G. Honarasa, G. Honarasa, T. Alamfard, T. Alamfard, } "Temperature distribution and thermal lensing in a flash lamp pumped Nd:YAG laser", Proc. SPIE 7747, 16th International School on Quantum Electronics: Laser Physics and Applications, 77471A (17 January 2011); doi: 10.1117/12.882035; https://doi.org/10.1117/12.882035
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