Abstract
We experimentally demonstrate simultaneous passive -switched (PQS) and gain-switched laser operations at 1888.8 and 2021.2 nm, respectively, in a single-cavity all-fiber laser. The PQS operation of the laser is based on the use of a high-concentration holmium-doped fiber as a fiber saturable absorber. Then the laser emission is used as a pulsed pump source to achieve gain-switched pulses. A high birefringence fiber optical loop mirror used as a spectral filter allows the tuning of both and laser emissions.
© 2018 Optical Society of America
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