We investigate numerically and analytically the effects of gain saturation on the propagation of the fundamental mode in a gain-guided index-antiguided slab waveguide. The propagating mode adapts to gain saturation by becoming less confined, while at the same time its peak intensity increases more slowly. At steady state, both the mode shape and the power remain constant.
© 2009 Optical Society of America
Lasers and Laser Optics
Original Manuscript: April 12, 2009
Manuscript Accepted: June 17, 2009
Published: August 4, 2009
Tsing-Hua Her, Xianyu Ao, and Lee W. Casperson, "Gain saturation in gain-guided slab waveguides with large-index antiguiding," Opt. Lett. 34, 2411-2413 (2009)