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Proceedings Paper

High-peak-power pulse amplification in SM fibers
Author(s): Matthias P. Savage-Leuchs; Ryan C. Stafford; Larry Borschowa; Mark S. Bowers
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Paper Abstract

In this paper we report on the performance of a modular single mode pulsed fiber laser system operating in the C-band. With off-the-shelf telecom components and specialty-designed electronics, 3 kW peak power can be generated in a short (1 ns) pulse at 10 kHz at 1545 nm; however, the onset of nonlinear optical effects (SRS, FWM, and SPM) is observed at a 1kW peak power level. Using highly doped erbium fibers, peak powers up to 13kW and pulse energies of up to 20μJ have been generated with a pulse duration range of 0.6-5 nsec, repetition rates between 3kHz to 1 MHz, and at a wavelength of 1545.3nm and 1567.5 nm before the onset of nonlinear effects became noticeable. Therefore, with the use of highly doped erbium fiber, the onset of nonlinear effects can be increased by an order of magnitude. For narrowband amplification, stimulated Brillouin scattering (SBS) is the limiting nonlinear process. In this regime we recorded the onset of SBS at 8μJ/pulse with a duration of 2.5 nsec. Depending on the pulse shape and pulse duration, self phase modulation (SPM) was also observed, which spectrally broadens the output centered at the signal wavelength; however, the spectral broadening due to SPM is only minor compared to SRS and FWM. It was also demonstrated that pulse steepening is minimized with an appropriate seed waveform. A 3 ns, shaped, input pulse nearly maintained its pulse duration after amplification. Without pulse shaping, the pulse shortened to 1.1 ns.

Paper Details

Date Published: 7 June 2004
PDF: 8 pages
Proc. SPIE 5335, Fiber Lasers: Technology, Systems, and Applications, (7 June 2004); doi: 10.1117/12.529639
Show Author Affiliations
Matthias P. Savage-Leuchs, Aculight Corp. (United States)
Ryan C. Stafford, Aculight Corp. (United States)
Larry Borschowa, Aculight Corp. (United States)
Mark S. Bowers, Aculight Corp. (United States)

Published in SPIE Proceedings Vol. 5335:
Fiber Lasers: Technology, Systems, and Applications
L. N. Durvasula, Editor(s)

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