Mitigating intrinsic defects and laser damage using pulsetrain-burst (>100 MHz) ultrafast laser processing

Luke McKinney; Felix Frank; David Graper; Jesse Dean; Paul Forrester; Maxence Rioblanc; Marc Nantel; Robin Marjoribanks

doi:10.1117/12.629985

13 October 2005 Mitigating intrinsic defects and laser damage using pulsetrain-burst (>100 MHz) ultrafast laser processing

Luke McKinney, Felix Frank, David Graper, Jesse Dean, Paul Forrester, Maxence Rioblanc, Marc Nantel, Robin Marjoribanks

Author Affiliations +

Proceedings Volume 5970, Photonic Applications in Devices and Communication Systems; 59701L (2005) https://doi.org/10.1117/12.629985
Event: Photonics North, 2005, Toronto, Canada

Abstract

Ultrafast-laser micromachining has promise as an approach to trimming and 'healing' small laser-produced damage sites in laser-system optics--a common experience in state-of-the-art high-power laser systems. More-conventional approaches currently include mechanical micromachining, chemical modification, and treatment using cw and long-pulse lasers. Laser-optics materials of interest include fused silica, multilayer dielectric stacks for anti-reflection coatings or high-reflectivity mirrors, and inorganic crystals such as KD*P, used for Pockels cells and frequency-doubling. We report on novel efforts using ultrafast-laser pulsetrain-burst processing (microsecond bursts at 133 MHz) to mitigate damage in fused silica, dielectric coatings, and KD*P crystals. We have established the characteristics of pulsetrain-burst micromachining in fused silica, multilayer mirrors, and KD*P, and determined the etch rates and morphology under different conditions of fluence-delivery. From all of these, we have begun to identify new means to optimize the laser-repair of optics defects and damage.

Citation Download Citation

Luke McKinney, Felix Frank, David Graper, Jesse Dean, Paul Forrester, Maxence Rioblanc, Marc Nantel, and Robin Marjoribanks "Mitigating intrinsic defects and laser damage using pulsetrain-burst (>100 MHz) ultrafast laser processing", Proc. SPIE 5970, Photonic Applications in Devices and Communication Systems, 59701L (13 October 2005); https://doi.org/10.1117/12.629985

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