Abstract
We demonstrate multi-GHz rate picosecond pulse generation by passive mode- locking of an extended surface emitting diode laser which permits the incorporation of a saturable Bragg reflector mirror into a device, here designed for large aperture operation as a high power 980 nm InGaAs multiple quantum-well vertical cavity source? 2002 Optical Society of America OClS Codes: 120.5700,320.7120 Modelocking of lasers is a technique for generation of psec optical pulses. For potential applications ranging from high-speed chipscale optical clocks to nonlinear optical imaging in biology, passive mode-locking of a compact source such as a VCSEL is of interest. Keller and co-workers (I), in particular, have achieved high power psec pulse generation at multi-GHz repetition rates from optically pumped InGaAs MQW-based external cavity VCSELs, incorporating a semiconductor saturable Bragg absorber mirror (SESAM) for passive modelocking. Here we demonstrate the modelocking of a compact vertical extended cavity surface emitting diode laser (VECSEL) by using specific device design ideas.
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