Megawatt peak power, 1 kHz, 266 nm sub nanosecond laser source based on single-crystal fiber amplifier

Loïc Deyra (1) , Igor Martial (2) , Julien Didierjean (2) , François Balembois (1) , Patrick Georges (1)

1 Laboratoire Charles Fabry / Lasers
2 Fibercryst

We report the realization of a UV source based on the fourth harmonic generation with LBO/BBO of a Nd:YAG passively Q:switched oscillator amplified in a single-crystal fiber. With careful optimization of the nonlinear components and parameters, we obtain 530 mW average power at 266 nm with pulses of 540 ps at the repetition rate of 1 kHz, which represents a 22.7% total conversion efficiency from IR to UV and nearly 1 MW peak power. The beam quality M² is measured to be below 2

Domaines: Optique / photonique; Optique [physics.optics]

Loïc Deyra, Igor Martial, Julien Didierjean, François Balembois, Patrick Georges. Megawatt peak power, 1 kHz, 266 nm sub nanosecond laser source based on single-crystal fiber amplifier. Applied Physics B - Laser and Optics, 2013, ⟨10.1007/s00340-013-5376-7⟩. ⟨hal-00819328⟩