Share Email Print

Proceedings Paper

Laser simulation applying Fox-Li iteration: investigation of reason for non-convergence
Author(s): Alan H. Paxton; Chi Yang
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Fox-Li iteration is often used to numerically simulate lasers. If a solution is found, the complex field amplitude is a good indication of the laser mode. The case of a semiconductor laser, for which the medium possesses a self-focusing nonlinearity, was investigated. For a case of interest, the iterations did not yield a converged solution. Another approach was needed to explore the properties of the laser mode. The laser was treated (unphysically) as a regenerative amplifier. As the input to the amplifier, we required a smooth complex field distribution that matched the laser resonator. To obtain such a field, we found what would be the solution for the laser field if the strength of the self focusing nonlinearity were α = 0. This was used as the input to the laser, treated as an amplifier. Because the beam deteriorated as it propagated multiple passes in the resonator and through the gain medium (for α = 2.7), we concluded that a mode with good beam quality could not exist in the laser.

Paper Details

Date Published: 20 February 2017
PDF: 7 pages
Proc. SPIE 10090, Laser Resonators, Microresonators, and Beam Control XIX, 100901Y (20 February 2017); doi: 10.1117/12.2251013
Show Author Affiliations
Alan H. Paxton, Air Force Research Lab. (United States)
Chi Yang, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 10090:
Laser Resonators, Microresonators, and Beam Control XIX
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?