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Proceedings Paper

Modeling of thermal lensing and higher order ring-mode oscillation in end-pumped cw Nd:YAG lasers
Author(s): Jacob Frauchiger; Heinz P. Weber
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Paper Abstract

The influence of thermal lensing and mode matching on the oscillating mode in an end pumped Nd:YAG laser is investigated. Thermal lensing was measured by probing the output beam divergence of a dynamically stable resonator. The magnitude of lensing expected due to thermal dispersion was confirmed in a distinct range of adequate mode matching. Measurements on arrangements which typically exhibit higher order ring mode oscillation were performed, and compared to a refined model. The refined model is based on a modified numerical calculation of the eigenstate of the electrical field in the active resonator. The active medium is described by a general complex aperture transmission function. This function defines the transverse mode discrimination in the active resonator. Finally the conditions for fundamental mode oscillation without the use of aperture stops in the active resonator are estimated.

Paper Details

Date Published: 16 June 1993
PDF: 11 pages
Proc. SPIE 1865, Diode Pumping of Average-Power Solid State Lasers, (16 June 1993); doi: 10.1117/12.146953
Show Author Affiliations
Jacob Frauchiger, Institute of Applied Physics (Switzerland)
Heinz P. Weber, Institute of Applied Physics (Switzerland)

Published in SPIE Proceedings Vol. 1865:
Diode Pumping of Average-Power Solid State Lasers
Georg F. Albrecht; Raymond J. Beach; Stephan P. Velsko, Editor(s)

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