Laser simulation applying Fox-Li iteration: investigation of reason for non-convergence

Alan H. Paxton; Chi Yang

doi:10.1117/12.2251013

20 February 2017 Laser simulation applying Fox-Li iteration: investigation of reason for non-convergence

Alan H. Paxton, Chi Yang

Proceedings Volume 10090, Laser Resonators, Microresonators, and Beam Control XIX; 100901Y (2017) https://doi.org/10.1117/12.2251013
Event: SPIE LASE, 2017, San Francisco, California, United States

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.

Citation Download Citation

Alan H. Paxton and Chi Yang "Laser simulation applying Fox-Li iteration: investigation of reason for non-convergence", Proc. SPIE 10090, Laser Resonators, Microresonators, and Beam Control XIX, 100901Y (20 February 2017); https://doi.org/10.1117/12.2251013

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available