We report on an integrated approach to obtain multiwavelength emission from semiconductor ring lasers with filtered optical feedback. The filtered feedback is realized on-chip employing two arrayed-waveguide gratings to split/recombine light into different wavelength channels. Through experimental observations and numerical simulations, we find that the effective gain of the different modes is the key parameter which has to be balanced in order to achieve multiwavelength emission. This can be achieved by tuning the injection current in each amplifier.
© 2013 Optical Society of America
Lasers and Laser Optics
Original Manuscript: April 1, 2013
Revised Manuscript: May 22, 2013
Manuscript Accepted: June 14, 2013
Published: July 15, 2013
Mulham Khoder, Guy Verschaffelt, Romain Modeste Nguimdo, Xaveer Leijtens, Jeroen Bolk, and Jan Danckaert, "Controlled multiwavelength emission using semiconductor ring lasers with on-chip filtered optical feedback," Opt. Lett. 38, 2608-2610 (2013)