scholarly journals Time-resolved study of laser emission in nitrogen gas pumped by two near IR femtosecond laser pulses

2021 ◽  
Author(s):  
Rostyslav Danylo ◽  
guillaume lambert ◽  
Yi Liu ◽  
Vladimir Tikhonchuk ◽  
Aurelien Houard ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Emission ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Nitrogen Gas ◽  
Time Resolved ◽  
Near Ir

Time-resolved dynamics analysis of nanoparticles applying dual femtosecond laser pulses

2008 ◽  
Vol 91 (3) ◽  
pp. 385-392 ◽  
Author(s):  
N. Jegenyes ◽  
J. Etchepare ◽  
B. Reynier ◽  
D. Scuderi ◽  
A. Dos-Santos ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Dynamics Analysis ◽  
Time Resolved

scholarly journals Time-resolved shadowgraphs of transient plasma induced by spatiotemporally focused femtosecond laser pulses in fused silica glass

2015 ◽  
Vol 40 (24) ◽  
pp. 5726 ◽  
Author(s):  
Zhaohui Wang ◽  
Bin Zeng ◽  
Guihua Li ◽  
Hongqiang Xie ◽  
Wei Chu ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Silica Glass ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Fused Silica ◽  
Time Resolved ◽  
Transient Plasma ◽  
Fused Silica Glass

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.

Time-resolved and energy-dispersed spin excitation in ferromagnets and clusters under influence of femtosecond laser pulses

2009 ◽  
Vol 105 (7) ◽  
pp. 07D305 ◽  
Author(s):  
T. Hartenstein ◽  
G. Lefkidis ◽  
W. Hübner ◽  
G. P. Zhang ◽  
Y. Bai
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Spin Excitation ◽  
Time Resolved
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