Optical Breakdown of 6H SiC Induced by Wavelength-Tunable Femtosecond Laser Pulses

2006 ◽  
Vol 45 (1A) ◽  
pp. 28-31 ◽  
Author(s):  
Hongxin Chen ◽  
Tianqing Jia ◽  
Min Huang ◽  
Fuli Zhao ◽  
Hiroto Kuroda ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Optical Breakdown ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Wavelength Tunable

Optical breakdown and filamentation of femtosecond laser pulses propagating in air at a kHz repetition rate

2004 ◽  
Vol 13 (3) ◽  
pp. 359-363 ◽  
Author(s):  
Duan Zuo-Liang ◽  
Chen Jian-Ping ◽  
Li Ru-Xin ◽  
Lin Li-Huang ◽  
Xu Zhi-Zhan
Keyword(s):  
Femtosecond Laser ◽  
Repetition Rate ◽  
Optical Breakdown ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses

Wavelength tunable, high energy femtosecond laser pulses directly generated from large-mode-area photonic crystal fiber

2012 ◽  
Vol 285 (10-11) ◽  
pp. 2715-2718 ◽  
Author(s):  
Chi Zhang ◽  
Yu-ying Zhang ◽  
Ming-lie Hu ◽  
Si-jia Wang ◽  
You-jian Song ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Femtosecond Laser ◽  
Photonic Crystal Fiber ◽  
Laser Pulses ◽  
High Energy ◽  
Femtosecond Laser Pulses ◽  
Large Mode Area ◽  
Crystal Fiber ◽  
Wavelength Tunable ◽  
Mode Area

scholarly journals Time- and space-resolved dynamics of ablation and optical breakdown induced by femtosecond laser pulses in indium phosphide

2008 ◽  
Vol 103 (5) ◽  
pp. 054910 ◽  
Author(s):  
Jörn Bonse ◽  
Guillaume Bachelier ◽  
Jan Siegel ◽  
Javier Solis ◽  
Heinz Sturm
Keyword(s):  
Femtosecond Laser ◽  
Indium Phosphide ◽  
Optical Breakdown ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Time And Space

scholarly journals Optical breakdown for silica and silicon with double femtosecond laser pulses

2005 ◽  
Vol 13 (8) ◽  
pp. 3096 ◽  
Author(s):  
Y. P. Deng ◽  
X. H. Xie ◽  
H. Xiong ◽  
Y. X. Leng ◽  
C. F. Cheng ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Optical Breakdown ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses

Localized Electron Evolution Induced by Femtosecond Laser Pulses in Water

2001 ◽  
Author(s):  
C. H. Fan ◽  
J. Sun ◽  
J. P. Longtin
Keyword(s):  
Femtosecond Laser ◽  
Electron Density ◽  
Inhomogeneous Plasma ◽  
Optical Breakdown ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Rate Equations ◽  
Focal Region ◽  
Ultrashort Laser

Abstract Optical breakdown by ultrashort laser pulses in dielectrics presents an efficient method to deposit laser energy into materials that otherwise exhibit minimal absorption at low laser intensities. During optical breakdown, a high density of free electrons is formed in the material, which dominates energy absorption, and, in turn, the material removal rate during ultrafast laser-material processing. Classical models assume spatially uniform electron population and constant laser intensity in the focal region, which results in a time-dependent expressions only, i.e., the rate equations, to predict electron evolution induced by nanosecond and picosecond pulses. For femtosecond pulses, however, the small spatial extent of the pulse requires that the pulse propagation be considered, which results in inhomogeneous plasma and localized electron formation during optical breakdown. In this work, a femtosecond breakdown model is combined with the classical rate equations to determine both time- and position-dependent electron density during femtosecond optical breakdown in water. The model exhibits good agreement when compared with experimental results. For other transparent or moderately absorbing dielectric media, the model also shows promise for determining the time- and position-dependent electron evolution induced by ultrashort laser pulses. Another interesting result is that the maximum electron density formed during femtosecond-laser-induced optical breakdown can exceed the conventional limit imposed by the plasma frequency.

scholarly journals Optical breakdown threshold in fused silica with femtosecond laser pulses

2013 ◽  
Vol 31 (3) ◽  
pp. 523-529 ◽  
Author(s):  
A. Bendib ◽  
K. Bendib-Kalache ◽  
C. Deutsch
Keyword(s):  
Femtosecond Laser ◽  
Optical Breakdown ◽  
Laser Pulses ◽  
Energy Balance Equation ◽  
Femtosecond Laser Pulses ◽  
Fused Silica ◽  
Breakdown Threshold ◽  
Density Profiles ◽  
Electron Density Profiles ◽  
Three Body

AbstractA theoretical model for electrons in the conduction band intend to investigate the optical breakdown threshold in femtosecond laser pulse-fused silica interaction is presented. The model is derived from a rate equation that includes the avalanche and multi-photon ionization processes of Thornber and Keldysh, respectively, and also the three-body and exciton recombination mechanisms. In addition, the time evolution of electron mean energy is also considered through the energy balance equation. The mean energy acts as a trigger for the avalanche mechanism. The evolution of electron density profiles is calculated and discussed with respect to the ionization and recombination mechanisms. The results for the fluence threshold as a function of the pulse duration fall in good agreement with the experimental data reported in the literature.

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