Plasma mediated ablation of biological tissues with nanosecond-to-femtosecond laser pulses: relative role of linear and nonlinear absorption

1996 ◽  
Vol 2 (4) ◽  
pp. 801-809 ◽  
Author(s):  
A.A. Oraevsky ◽  
L.B. Da Silva ◽  
A.M. Rubenchik ◽  
M.D. Feit ◽  
M.E. Glinsky ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Nonlinear Absorption ◽  
Laser Pulses ◽  
Biological Tissues ◽  
Femtosecond Laser Pulses ◽  
Relative Role ◽  
Linear And Nonlinear

Nonlinear absorption of femtosecond laser pulses (800 nm) by atmospheric air and water vapour

2011 ◽  
Vol 41 (11) ◽  
pp. 976-979 ◽  
Author(s):  
A M Kiselev ◽  
Yu N Ponomarev ◽  
A N Stepanov ◽  
A B Tikhomirov ◽  
B A Tikhomirov
Keyword(s):  
Femtosecond Laser ◽  
Water Vapour ◽  
Nonlinear Absorption ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Atmospheric Air

scholarly journals Understanding the Seeding Pulse-Induced Optical Amplification in N 2 + Pumped by 800 NM Femtosecond Laser Pulses

Photonics ◽  
2020 ◽  
Vol 7 (4) ◽  
pp. 99
Author(s):  
Zhengquan Fan ◽  
Xiang Zhang ◽  
Qi Lu ◽  
Yu Luo ◽  
Qingqing Liang ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Optical Gain ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Time Resolved ◽  
Optical Amplification ◽  
Pump Probe ◽  
Amplification Process ◽  
Energy Amplification

Nitrogen ions pumped by intense femtosecond laser pulses present an optical gain at 391.4 nm, evident by energy amplification of an injected resonant seeding pulse. We report a time-resolved measurement of the amplification process with seeding pulses having varying intensities. It is found that the amplification factor depends on the intensity of the seeding pulse and the effective temporal window for the optical gain becomes longer by applying more intense seeding pulses. These two features are in sharp contrast with classic pump-probe experiments, pinpointing the crucial role of macroscopic coherence and its dynamics during the lasing process. We further measure the temporal profile of the amplified emission for seeding pulse injected at different time delays. A complicated temporal behavior is observed, which highlights the nature of the superfluorescence.

scholarly journals The role of heat effects in the process of formation of color centers in LiF during filamentation of femtosecond laser pulses

2019 ◽  
Vol 220 ◽  
pp. 02007
Author(s):  
A.V. Kuznetsov ◽  
V.P. Dresvyansky ◽  
O. Bukhtsoozh ◽  
S. Enkhbat ◽  
E.F. Martynovich
Keyword(s):  
Femtosecond Laser ◽  
Thermal Effects ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Color Centers ◽  
Heat Effects ◽  
Femtosecond Filamentation

The possibility of the influence of thermal effects on the formation of color centers during laser femtosecond filamentation in a LiF crystal has been investigated theoretically. The conditions are formulated under which the influence of thermal effects can be noticeable.

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