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Optical Engineering • Open Access

High-energy femtosecond 2-μm fiber laser
Author(s): Peng Wan; Lih-Mei Yang; Jian Liu

Paper Abstract

We describe in detail a high energy, high power ultrafast thulium-doped fiber laser system. The pulse energy of 156 μJ was realized. The laser system is comprised of a mode-locked 2020-nm seed oscillator and multiple-stage power/energy amplifiers. The seed oscillator output pulses at a repetition rate of 2.5 MHz. The seed pulses were stretched with the anomalous dispersion fiber to the duration of 320 ps. An acousto-optic modulator was used as a pulse picker to lower the repetition rate. A two-stage preamplifier was used to boost the pulse energy to 3 μJ. The pulse energies of up to 156 μJ and the average power of 15.6 W were obtained from the final stage of power amplifier at a repetition rate of 100 kHz with a slope efficiency of 26%. The pulse durations of 780 fs were obtained after pulse compression. High optical signal-to-noise ratio (OSNR) and low background noise were also achieved at this low repetition rate.

Paper Details

Date Published: 31 December 2013
PDF: 4 pages
Opt. Eng. 53(5) 051508 doi: 10.1117/1.OE.53.5.051508
Published in: Optical Engineering Volume 53, Issue 5
Show Author Affiliations
Peng Wan, PolarOnyx, Inc. (United States)
Lih-Mei Yang, PolarOnyx, Inc. (United States)
Jian Liu, PolarOnyx, Inc. (United States)

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