Ultra-deep plasma-assisted drilling of solids by high-power nanosecond lasers: experimental studies

Stanley Paul; Kevin Lyon; Sergey I. Kudryashov; Susan D. Allen

doi:10.1117/12.647003

23 February 2006 Ultra-deep plasma-assisted drilling of solids by high-power nanosecond lasers: experimental studies

Stanley Paul, Kevin Lyon, Sergey I. Kudryashov, Susan D. Allen

Proceedings Volume 6107, Laser-based Micropackaging; 610709 (2006) https://doi.org/10.1117/12.647003
Event: Lasers and Applications in Science and Engineering, 2006, San Jose, California, United States

Abstract

A new mechanism of ultra-deep (up to tens of microns per pulse, sub-mm total hole depths) plasma-assisted ablative drilling of optically opaque and transparent materials by high-power nanosecond lasers proposed by Kudryashov et al. has been studied experimentally using average drilling rate and photoacoustic measurements. In the drilling experiments, average multi-micron crater depth per laser shot and instantaneous recoil pressure of ablated products have been measured as a function of laser energy at constant focusing conditions using optical transmission and contact photo acoustic techniques, respectively. Experimental results of this work support the theoretical explanation of the ultra-deep drilling mechanism as a number of stages including ultra-deep "non-thermal" energy delivery by a short-wavelength radiation of the surface high-temperature ablative plasma, bulk heating and melting of these materials, accompanied by the following subsurface boiling in the melt pool and resulting melt expulsion off of the target.

Citation Download Citation

Stanley Paul, Kevin Lyon, Sergey I. Kudryashov, and Susan D. Allen "Ultra-deep plasma-assisted drilling of solids by high-power nanosecond lasers: experimental studies", Proc. SPIE 6107, Laser-based Micropackaging, 610709 (23 February 2006); https://doi.org/10.1117/12.647003

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