Wide wavelength tunability of single- and two-color operating vertical-external-cavity-surface-emitting lasers (VECSELs) is demonstrated. Employing an external feedback based on a diffractive grating outside the cavity of a narrow-line single-color VECSEL allows for a continuous tuning of the emission wavelength over 10 nm. Employing a dual-feedback-configuration for tunable two-color emission, a tunability of the difference frequency between the two lasing wavelengths from 300 gigahertz to up to 3.5 terahertz is demonstrated.
© 2012 Optical Society of America
Lasers and Laser Optics
Original Manuscript: October 17, 2011
Manuscript Accepted: November 8, 2011
Published: December 22, 2011
Maik Scheller, Stephan W. Koch, and Jerome V. Moloney, "Grating-based wavelength control of single- and two-color vertical-external-cavity-surface-emitting lasers," Opt. Lett. 37, 25-27 (2012)