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Ultra-flat supercontinuum from 1.95 to 2.65 µm in a nanosecond pulsed Thulium-doped fiber laser

: Romano, Clément; Jaouën, Yves; Tench, Robert E.; Delavaux, Jean-Marc


Optical Fiber Technology 54 (2020), Art. 102113, 5 pp.
ISSN: 1068-5200
Journal Article
Fraunhofer IOSB ()
supercontinuum; nanosecond; MOPA; Thulium

We report on mid-IR supercontinuum generation in an all-silica nanosecond pulsed fiber laser. The laser topology is a master oscillator power amplifier which consists of a two stage Thulium-doped fiber amplifier seeded with a directly modulated semiconductor laser at 1952 nm. The supercontinuum performance is investigated for repetition rate frequencies between 35 kHz and 100 kHz and pulse widths between 6 ns and 21 ns. Supercontinuum average output powers greater than 1.5 W and spectra ranging from 1.95 µm to 2.65 µm are demonstrated.