2.3-µm single-frequency Tm: ZBLAN fiber amplifier with output power of 1.41 W

We present here the first watt-level single-frequency thulium-doped ZBLAN fiber amplifier system operating at a wavelength of 2.3 µm. Continuous-wave output of up to 1.41 W was generated from a two-stage Tm: ZBLAN fiber amplifier with direct ground-state pumping at 793 nm. Seeded by a single-frequen...

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Bibliographic Details
Published in:Optics express 2023-11, Vol.31 (24), p.40991-40999
Main Authors: Li, Xuanxi, Xu, Yamei, Yang, Linyong, Cui, Yulong, Zhou, Zhiyue, Wang, Meng, Wang, Zefeng
Format: Article
Language:English
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Summary:We present here the first watt-level single-frequency thulium-doped ZBLAN fiber amplifier system operating at a wavelength of 2.3 µm. Continuous-wave output of up to 1.41 W was generated from a two-stage Tm: ZBLAN fiber amplifier with direct ground-state pumping at 793 nm. Seeded by a single-frequency distributed feedback diode laser at 2332 nm, the thulium-doped ZBLAN fiber amplifier emitted a laser with linewidth no more than 10 MHz at maximal output power. This study examines the impact of a 2.3-µm seed on the competitive laser transition of 2 µm. The findings indicate that direct pumping of a Tm fiber amplifier holds the potential for achieving higher power output within the 2.3-µm band.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.508003