A high-peak power nanosecond all-fiber MOPA system at high-repetition rate

Chun-Lin Chang; Po-Yen Lai; Yen-Yin Li; Shih-Hung Chen; Sheng-Lung Huang

doi:10.1117/12.2000617

26 February 2013 A high-peak power nanosecond all-fiber MOPA system at high-repetition rate

Chun-Lin Chang, Po-Yen Lai, Yen-Yin Li, Shih-Hung Chen, Sheng-Lung Huang

Proceedings Volume 8601, Fiber Lasers X: Technology, Systems, and Applications; 86011X (2013) https://doi.org/10.1117/12.2000617
Event: SPIE LASE, 2013, San Francisco, California, United States

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.

Citation Download Citation

Chun-Lin Chang, Po-Yen Lai, Yen-Yin Li, Shih-Hung Chen, and Sheng-Lung Huang "A high-peak power nanosecond all-fiber MOPA system at high-repetition rate", Proc. SPIE 8601, Fiber Lasers X: Technology, Systems, and Applications, 86011X (26 February 2013); https://doi.org/10.1117/12.2000617

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