Wavelength stabilization of semiconductor lasers with a tunable photodetector

L. Colace, G. Masini, and G. Assanto

Appl. Phys. Lett. 80, 3039-3041 (2002)


We introduce an original approach to stabilizing the wavelength of a semiconductor laser employing a voltage-tunable photodetector. The latter provides a bipolar error signal driving a feedback loop for the laser re-tuning. We demonstrate wavelength stabilization within 25 pm in the 1.55micron window. Performances, system compactness and integrability make the approach quite appealing for use in dense wavelength division multiplexing networks.