Author(s) Meng, Y.; Li, Y.; Xu, Y.; Wang, F.
Journal Sci Rep
Date Published 2017 Mar 21

We demonstrated a mode-locked thulium/holmium (Tm/Ho) fiber laser continuously tunable across 200 nm (from 1860 nm to 2060 nm), which to the best of our knowledge represents the widest tuning range ever achieved for a passively mode-locked fiber laser oscillator. The combined use of a broadband carbon nanotube (CNT) saturable absorber and a diffraction grating mirror ensures ultra-broad tuning range, superb stability and repeatability, and makes the demonstrated laser a highly practical source for spectroscopy, imaging and optical communications. The laser emits <5 ps pulses with an optical spectral bandwidth of ∼3 nm across the full tuning range. Our results indicate that carbon nanotubes can be an excellent saturable absorber for achieving gain-bandwidth-limited tunable operation for 2 μm thulium fiber lasers.

DOI 10.1038/srep45109
ISSN 2045-2322
Citation Meng Y, Li Y, Xu Y, Wang F. Carbon Nanotube Mode-Locked Thulium Fiber Laser With 200 nm Tuning Range. Sci Rep. 2017;7:45109.

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