Orthogonally polarized optical feedback has been proven to act on the frequency of semiconductor lasers. The coupling of this feedback to a nonlinear filter results in bistability for the frequency of the laser output [ Phys. Rev. Lett. 94, 173902 (2005) ]. This phenomenon opens the way to the development of all-optical devices such as a switch between frequency states of the optical emission. For demonstrating this particular application we use an AsGaAl monomode laser emitting around 852 nm, together with a warm atomic cesium vapor as a resonant filter. The output frequency state of the switch is determined by two different frequencies of a control laser, with each control frequency changing the switch frequency in only one direction.
© 2010 Optical Society of America
Original Manuscript: February 2, 2010
Revised Manuscript: April 26, 2010
Manuscript Accepted: May 26, 2010
Published: June 22, 2010
T. Sorrentino, O. Di Lorenzo, L. C. de Oliveira, M. Chevrollier, and M. Oriá, "All-optical frequency-controlled frequency switch," J. Opt. Soc. Am. B 27, 1458-1463 (2010)