Dynamics of transient absorption in bulk DKDP crystals following laser energy deposition

The transient changes in the optical properties of bulk DKDP material arising from its exposure to high temperatures and pressures associated with localized laser energy deposition are investigated. Two methods for initiation of laser-induced breakdown are used, intrinsic, involving relatively large...

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Bibliographic Details
Published in:Optics express 2012-08, Vol.20 (18), p.20447-20458
Main Authors: Negres, R A, Raman, R N, Bude, J D, Feit, M D, Demos, S G
Format: Article
Language:English
Subjects:
Absorption
Computer Simulation
Crystallization
Energy Transfer
Lasers
Models, Chemical
Phosphates - chemistry
Phosphates - radiation effects
Potassium Compounds - chemistry
Potassium Compounds - radiation effects
Radiation Dosage
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Summary:The transient changes in the optical properties of bulk DKDP material arising from its exposure to high temperatures and pressures associated with localized laser energy deposition are investigated. Two methods for initiation of laser-induced breakdown are used, intrinsic, involving relatively large energy deposition brought about by focusing of the laser beam to high intensities, and extrinsic, arising from more localized deposition due to the presence of pre-existing absorbing damage initiating defects. Each method leads to a very different volume of material being affected, which provides for different material thermal relaxation times to help better understand the processes involved.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.20.020447