We report a direct diode-pumped all-fiber tunable laser source at 2 μm with a tuning range of more than 250 nm. A 3 dB power flatness of 200 nm with a maximum output power of 30 mW at 1930 nm was achieved. The laser has a high optical signal-to-noise ratio (OSNR) of more than 40 dB across the whole tuning range.
© 2013 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: July 23, 2013
Revised Manuscript: October 10, 2013
Manuscript Accepted: October 10, 2013
Published: November 12, 2013
Z. Li, S. U. Alam, Y. Jung, A. M. Heidt, and D. J. Richardson, "All-fiber, ultra-wideband tunable laser at 2 μm," Opt. Lett. 38, 4739-4742 (2013)