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26 February 2013 High power amplification of a tailored-pulse fiber laser
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We demonstrate the amplification of a 1064nm pulse-programmable fiber laser with Large Pitch Rod-Type Fibers of various Mode field diameters from 50 to 70 μm. We have developed a high power fiber amplifier at 1064nm delivering up to 100W/1mJ at 15ns pulses and 30W/300μJ at 2ns with linearly polarized and diffraction limited output beam (M²<1.2). The specific seeder from ESI – Pyrophotonics Lasers used in the experiment allowed us to obtain tailored-pulse programmable on demand at the output from 2ns to 600ns for various repetition rates from 10 to 500 kHz. We could demonstrate square pulses or any other shapes (also multi-pulses) whatever the repetition rate or the pulse duration. We also performed frequency conversion with LBO crystals leading to 50W at 532nm and 25W at 355nm with a diffraction limited output. Similar experiments performed at 1032nm are also reported.
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Julien Saby, Damien Sangla, Stéphane Caplette, Reynald Boula-Picard, Mathieu Drolet, Benoit Reid, and François Salin "High power amplification of a tailored-pulse fiber laser", Proc. SPIE 8601, Fiber Lasers X: Technology, Systems, and Applications, 86011O (26 February 2013); doi: 10.1117/12.2002052;

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