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Proceedings Paper

A high-peak power nanosecond all-fiber MOPA system at high-repetition rate
Author(s): Chun-Lin Chang; Po-Yen Lai; Yen-Yin Li; Shih-Hung Chen; Sheng-Lung Huang
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Paper Abstract

By limiting the core diameter of 15 μm at maximum with NA=0.07±0.01 for the near-diffraction-limited output (V <3.6), we successfully generate the pulse with the peak power of 36 kW and the duration of 4.6 ns in FWHM at the repetition rate of 20 kHz. To the best of our knowledge, the signal pulse energy corresponding to 264 μJ is the highest to date in the diode-seeded 15-μm all-fiber MOPA system with the efficiency of 35%. The success in the energy/power scaling is attributed to the further raise of input energy for more extracted energy, the tradeoff between the Raman-limited signal energy and the amplifier slope efficiency for more signal energy ratio, and the proper adjustment of both pump wavelength and power for avoiding coat damage without forced cooling.

Paper Details

Date Published: 26 February 2013
PDF: 7 pages
Proc. SPIE 8601, Fiber Lasers X: Technology, Systems, and Applications, 86011X (26 February 2013); doi: 10.1117/12.2000617
Show Author Affiliations
Chun-Lin Chang, National Taiwan Univ. (Taiwan)
Po-Yen Lai, National Central Univ. (Taiwan)
Yen-Yin Li, National Taiwan Univ. (Taiwan)
Shih-Hung Chen, National Central Univ. (Taiwan)
Sheng-Lung Huang, National Taiwan Univ. (Taiwan)

Published in SPIE Proceedings Vol. 8601:
Fiber Lasers X: Technology, Systems, and Applications
Sami T. Hendow, Editor(s)

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