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Proceedings Paper

Temperature distribution and thermal lensing in a flash lamp pumped Nd:YAG laser
Author(s): A. Keshavarz; G. Honarasa; T. Alamfard
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Paper 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.

Paper Details

Date Published: 17 January 2011
PDF: 7 pages
Proc. SPIE 7747, 16th International School on Quantum Electronics: Laser Physics and Applications, 77471A (17 January 2011); doi: 10.1117/12.882035
Show Author Affiliations
A. Keshavarz, Islamic Azad Univ. (Iran, Islamic Republic of)
Shiraz Univ. of Technology (Iran, Islamic Republic of)
G. Honarasa, Islamic Azad Univ. (Iran, Islamic Republic of)
Shiraz Univ. of Technology (Iran, Islamic Republic of)
T. Alamfard, Islamic Azad Univ. (Iran, Islamic Republic of)
Shiraz Univ. of Technology (Iran, Islamic Republic of)


Published in SPIE Proceedings Vol. 7747:
16th International School on Quantum Electronics: Laser Physics and Applications
Tanja Dreischuh; Dimitar Slavov, Editor(s)

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