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Proceedings Paper

Highly-efficient, high-energy pulse-burst Yb-doped fiber laser with transform limited linewidth
Author(s): Doruk Engin; Ibraheem Darab; John Burton; Jean-Luc Fouron; Frank Kimpel; Brian Mathason; Shantanu Gupta; Mark Storm
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Paper Abstract

A 1um fiber laser outputting high energy (<1mJ) pulse-bursts with high peak powers (<15kW) and narrow linewidth (<300MHz) is an attractive pump source for tunable periodically poled crystal (PPx) based OPA’s which are used in gas sensing, imaging and communication applications. Here a turn-key 1064nm PM Yb-doped fiber amplifier capable of generating high pulse burst energies with transform limited linewidth is presented. The ~20W average power capable laser is optimized for high energy (0.5-2mJ) and high peak power (<10kW) operation at low duty cycles (<0.1%). The laser is capable of operating at <10x the saturation energy level of the final stage gain fiber and achieves a high level of pulse-to-pulse peak power uniformity within pulse-burst. Stimulated Brillion Scattering (SBS) limited micro pulse energy up to 40uJ is achieved and SBS dependence on micro pulse width and separation are characterized. High wall plug efficiency (<20%) for the FPGA controlled system is maintained by temporal and spectral ASE suppression and by spreading the necessary pulse pre-shaping losses (~12dB) to three different amplitude modulation points in the amplifier chain.

Paper Details

Date Published: 9 June 2014
PDF: 10 pages
Proc. SPIE 9081, Laser Technology for Defense and Security X, 908112 (9 June 2014); doi: 10.1117/12.2050506
Show Author Affiliations
Doruk Engin, Fibertek, Inc. (United States)
Ibraheem Darab, Fibertek, Inc. (United States)
John Burton, Fibertek, Inc. (United States)
Jean-Luc Fouron, Fibertek, Inc. (United States)
Frank Kimpel, Fibertek, Inc. (United States)
Brian Mathason, Fibertek, Inc. (United States)
Shantanu Gupta, Fibertek, Inc. (United States)
Mark Storm, Fibertek, Inc. (United States)

Published in SPIE Proceedings Vol. 9081:
Laser Technology for Defense and Security X
Mark Dubinskii; Stephen G. Post, Editor(s)

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