A numerical study of threshold gain and modal dispersion in integrated semiconductor laser optical frequency comb sources is presented. We consider an example device where one of the cleaved facets of the laser is replaced by a short Bragg grating section and show that as many as 16 modes can be selected at the first harmonic of the underlying Fabry–Perot cavity. An intracavity approach to limiting the grating-induced dispersion that can be implemented directly through the grating profile is demonstrated.
© 2011 Optical Society of America
Lasers and Laser Optics
Original Manuscript: May 3, 2011
Revised Manuscript: July 1, 2011
Manuscript Accepted: July 6, 2011
Published: August 1, 2011
David Bitauld, Simon Osborne, and Stephen O’Brien, "Design of waveguide-integrated semiconductor laser sources for optical frequency comb generation," Opt. Lett. 36, 2985-2987 (2011)