We present a low-temperature-grown GaAs device that combines the features of mode locking and photoconductive switching. The mode-locking mechanism is based on intensity-dependent defocusing. Additionally, the generated carriers produce an electrical signal in the biased switch geometry. This technique allows for simultaneous generation of synchronized optical and electrical pulse trains with a single device.
© 2002 Optical Society of America
(040.5150) Detectors : Photoconductivity
(140.3510) Lasers and laser optics : Lasers, fiber
(140.4050) Lasers and laser optics : Mode-locked lasers
(230.0250) Optical devices : Optoelectronics
Martin Leitner, Peter Glas, Peter Semionyk, Marc Wrage, Jens Herfort, and Lutz Däweritz, "Low-temperature-GaAs device used simultaneously as a mode-locking device and as a photoconductive switch," Appl. Opt. 41, 2228-2231 (2002)