Abstract

We report numerical results for gain saturation in circular-grating distributed-feedback semiconductor lasers. Our model includes a radially varying nonlinear gain and a uniformly distributed grating loss in the solution of the coupled-mode equations. Our results show that lossy, high-power operation results in an optimum coupling strength for efficient conversion of pump power into useful output power. Our results also show a multimode spectrum for large-coupling strengths, a consequence of mode competition induced by a spatially varying gain distribution. Single-mode selection entails operating at approximately the optimum coupling coefficient determined for efficient pumping.

© 1997 Optical Society of America

Envelope Gain Saturation in Distributed-Feedback Lasers

K. O. Hill and A. Watanabe
Appl. Opt. 14(4) 950-961 (1975)

Nonlinear dynamics of circular-grating distributed-feedback semiconductor devices

K. J. Kasunic and E. M. Wright
J. Opt. Soc. Am. B 16(1) 96-102 (1999)

Gain saturation in distributed feedback lasers

H. A. Haus
Appl. Opt. 14(11) 2650-2652 (1975)

Design and analysis of a low-threshold polymer circular-grating distributed-feedback laser

Guy F. Barlow, Alan Shore, Graham A. Turnbull, and Ifor D. W. Samuel
J. Opt. Soc. Am. B 21(12) 2142-2150 (2004)

Lasing behavior of circular grating surface-emitting semiconductor lasers

Rebecca H. Jordan, Dennis G. Hall, Oliver King, Gary Wicks, and Stephen Rishton
J. Opt. Soc. Am. B 14(2) 449-453 (1997)