Abstract

We report on a passively mode-locked optically pumped GaSb-based semiconductor disk laser producing stable picosecond optical pulses at a 1.95μm wavelength. The gain mirror was comprised of a 15 quantum well InGaSb/GaSb structure. A fast semiconductor saturable absorber mirror with three InGaSb/GaSb quantum wells was used to attain self-starting mode-locked operation at a fundamental repetition rate of 881.2MHz. The laser produced pulses with 30pJ energy and a duration of 1.1ps within a factor of 2 of the Fourier limit.

© 2010 Optical Society of America

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