Title :
Breakdown experiments in liquids by short pulse lasers and their thresholds calculations
Author :
Fukutomi, H. ; Yasojima, Y.
Author_Institution :
Electron. Eng. & Comput. Sci., Kinki Univ., Osaka, Japan
Abstract :
Theoretical and experimental studies on laser-induced breakdown in liquids are pursued using Q-switch laser pulses of the second harmonic (0.532 μm, 5 nsec) of a Nd:YAG laser. In NaCl solutions the breakdown fields are studied changing NaCl concentrations in distilled water. In linear hydrocarbon liquids the breakdown fields are studied as a function of the index n of CnH2n+2. The mechanism of optical breakdown in those liquids are investigated using a rate equation of electron multiplication which includes the processes of initial electron supply and avalanche ionization
Keywords :
avalanche breakdown; dielectric liquids; laser beam effects; organic compounds; photoionisation; sodium compounds; solutions; 0.532 mum; 5 ns; NaCl; NaCl concentrations; NaCl solutions; Nd:YAG laser; Q-switch laser pulses; YAG:Nd; YAl5O12:Nd; avalanche ionization; breakdown experiments; breakdown fields; distilled water; electron multiplication; initial electron supply; laser-induced breakdown; linear hydrocarbon liquids; liquids; optical breakdown; rate equation; second harmonic; short pulse lasers; threshold calculations; Biomedical optical imaging; Electric breakdown; Electrons; Equations; Gas lasers; Gases; Hydrocarbons; Laser theory; Liquids; Optical pulses;
Conference_Titel :
Dielectric Liquids, 1999. (ICDL '99) Proceedings of the 1999 IEEE 13th International Conference on
Conference_Location :
Nara
Print_ISBN :
0-7803-4759-5
DOI :
10.1109/ICDL.1999.798902
