High-power diode-pumped Q-switched Er3+:YAG single-crystal fiber laser for active imaging system

Details High-power diode-pumped Q-switched Er3+:YAG single-crystal fiber laser for active imaging system High-power diode-pumped Q-switched Er3+:YAG single-crystal fiber laser for active imaging system

2012-01-12

arxiv.org/abs/1201.2652v1

Physics

Optics

Defense, Security and Sensing, Orlando : \'Etats-Unis (2011)

Scientific paper

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 M^{2} factor below 1.8. To our knowledge this is the first directly grown Er3+:YAG single-crystal fiber Q-switched laser. In dual-side pumping scheme a laser emission at 1617 nm is achieved with output powers up to 5.7 W representing the highest output power ever achieved by a diode-pumped Er:YAG laser at this wavelength.

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