Megawatt peak power, 1 kHz, 266 nm sub nanosecond laser source based on single-crystal fiber amplifier
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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 M 2 is measured to be below 2.
KeywordsConversion Efficiency Master Oscillator Power Amplifier Microchip Laser Master Oscillator Power Amplifier System Initial Pulse Width
Loïc Deyra acknowledges the DGA for the funding of his PhD. We thank Alain Maillard (LMOPS Laboratory of University de Lorraine and Supelec, France) and Philippe Villeval (Cristal Laser, France) for the elaboration, orientation, cutting and polishing of the BBO crystals.
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