15 February 2011 High-power diode-pumped Q-switched Er3+:YAG single-crystal fiber laser
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Abstract
We describe an efficient laser emission from a directly grown Er3+:YAG single-crystal fiber that is resonantly pumped using a continuous-wave (CW) laser diode at 1532 nm. In a longitudinal pumping, it emits 12.5 W at 1645 nm with a slope efficiency of 32%, which is the highest ever reported for a directly grown Er:YAG single-crystal fiber laser. Using an off-axis pumping scheme, CW output powers up to 7.3 W can be reached and in Q-switched operation, the laser produces 2 mJ pulses with a duration of 38 ns at the repetition rate of 1 kHz with an M2 factor below 1.8. To our knowledge this is the first directly grown Er3+:YAG single-crystal fiber Q-switched laser.
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Igor Martial, Julien Didierjean, Nicolas Aubry, François Balembois, Patrick Georges, "High-power diode-pumped Q-switched Er3+:YAG single-crystal fiber laser", Proc. SPIE 7912, Solid State Lasers XX: Technology and Devices, 79121G (15 February 2011); doi: 10.1117/12.874534; https://doi.org/10.1117/12.874534
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