Multipulse passively Q-switched Nd:YAG laser for material surface cleaning

Constantin G. Fenic; Aurel Stratan; Razvan V. Dabu; Ion N. Mihailescu; Constantin Blanaru; Constantin Ungureanu

doi:10.1117/12.478628

9 August 2002 Multipulse passively Q-switched Nd:YAG laser for material surface cleaning

Constantin G. Fenic, Aurel Stratan, Razvan V. Dabu, Ion N. Mihailescu, Constantin Blanaru, Constantin Ungureanu

Proceedings Volume 4762, ALT'01 International Conference on Advanced Laser Technologies; (2002) https://doi.org/10.1117/12.478628
Event: International Conference on: Advanced Laser Technologies (ALT'01), 2001, Constanta, Romania

Abstract

A flash-lamp pumped Nd:YAG laser with confocal unstable resonator and super-Gaussian output mirror, multi-pulse passively Q- switched employing Cr⁴⁺:YAG and LiF:F₂ crystals with small-signal absorption in the 22-82% range, has been developed. At 49 J energy and 1 Hz repetition rate of the pump pulses, using a passive shutter with 37% initial transmission, a train of 12-13 pulses, separated by more than 8 microseconds, with average 52 mJ single pulse energy and 20 ns pulse-width, were measured. Under these conditions, the laser intensity at the optical fiber input face is under the fiber damage level, but output power density is high enough to reach the ablation threshold of various pollution layers deposited on the material surface.

Citation Download Citation

Constantin G. Fenic, Aurel Stratan, Razvan V. Dabu, Ion N. Mihailescu, Constantin Blanaru, and Constantin Ungureanu "Multipulse passively Q-switched Nd:YAG laser for material surface cleaning", Proc. SPIE 4762, ALT'01 International Conference on Advanced Laser Technologies, (9 August 2002); https://doi.org/10.1117/12.478628

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