NDLI: Theory and simulation on the threshold of water breakdown induced by focused ultrashort laser pulses

Content Provider	IEEE Xplore Digital Library
Author	Feng, Q. Moloney, J.V. Newell, A.C. Wright, E.M. Cook, K. Kennedy, P.K. Hammer, D.X. Rockwell, B.A. Thompson, C.R.
Copyright Year	1965
Abstract	A comprehensive model is developed for focused pulse propagation in water. The model incorporates self-focusing, group velocity dispersion, and laser-induced breakdown in which an electron plasma is generated via cascade and multiphoton ionization processes. The laser-induced breakdown is studied first without considering self-focusing to give a breakdown threshold of the light intensity, which compares favorably with existing experimental results. The simple study also yields the threshold dependence on pulse duration and input spot size, thus providing a framework to view the results of numerical simulations of the full model. The simulations establish the breakdown threshold in input power and reveal qualitatively different behavior for picoand femto-second pulses. For longer pulses, the cascade process provides the breakdown mechanism, while for shorter pulses the cooperation between the self-focusing and the multiphoton plasma generation dominates the breakdown threshold.
Sponsorship	IEEE Lasers and Electro-Optics Society
Starting Page	127
Ending Page	137
Page Count	11
File Size	330831
File Format	PDF
ISSN	00189197
Volume Number	33
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-02-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electric breakdown Laser modes Laser theory Quantum cascade lasers Plasma simulation Optical propagation Electrons Ionization Numerical simulation Pulse generation
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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