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Proceedings Paper

Q-switched pulses amplified with short thulium-doped silicate fibers
Author(s): Qing Wang; Jihong Geng; Tao Luo; Shibin Jiang
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Paper Abstract

30ns, 3μJ Q-switched pulse laser with the repetition rate of 10 kHz at 1950 nm was amplified with a 50cm long piece of thulium(Tm)-doped silicate fiber, and 300μJ pulses with the pulse width of 20 ns were obtained. The heavily Tm-doped silicate fiber has the cladding-pump absorption of 22dB/m at 793nm and the fiber maintains solid single-mode operation at 1950nm. To further increase output pulse energy, the Q-switched seed was pre-amplified to 20 μJ with core-pumping at 1567 nm. The power amplifier features of a 55cm long piece of Tm-doped silicate fiber with 21μm core. ~600μJ pulses with peak power up to 28 kW have been achieved. The ASE was suppressed 40dB below the laser pulses due to the short highly Tm-doped silicate fiber. Mode-locked pulses with the pulse energy of 0.3 nJ and the spectral width of 14 nm were amplified with a 30cm long Tm-fiber with 10 μm core, pulses with 16kW peak power as well as 20nJ pulses were achieved. With another Tm-doped silicate fiber (22μm core), 36nJ pulses with 1.1ps pulse width were obtained in all-fiber configuration. The high peak power pulses at 2 μm reported here should be useful for mid-IR generation.

Paper Details

Date Published: 15 February 2012
PDF: 6 pages
Proc. SPIE 8237, Fiber Lasers IX: Technology, Systems, and Applications, 82371W (15 February 2012); doi: 10.1117/12.909088
Show Author Affiliations
Qing Wang, AdValue Photonics, Inc. (United States)
Jihong Geng, AdValue Photonics, Inc. (United States)
Tao Luo, AdValue Photonics, Inc. (United States)
Shibin Jiang, AdValue Photonics, Inc. (United States)

Published in SPIE Proceedings Vol. 8237:
Fiber Lasers IX: Technology, Systems, and Applications
Eric C. Honea; Sami T. Hendow, Editor(s)

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