Self-phase modulation in perfluorinated polymer-based GI polymer optical fiber with intense femtosecond laser pulse

2002 ◽  
Author(s):  
M. Kanai ◽  
M. Obara
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Optical Fiber ◽  
Femtosecond Laser Pulse ◽  
Phase Modulation ◽  
Polymer Optical Fiber ◽  
Self Phase Modulation

Selective suppression and excitation of high resolution CARS spectra by tailoring femtosecond laser pulse

2017 ◽  
Vol 26 (04) ◽  
pp. 1750051 ◽  
Author(s):  
Yunxia Huang ◽  
Shuwu Xu ◽  
Shian Zhang
Keyword(s):  
High Resolution ◽  
Laser Pulse ◽  
Femtosecond Laser ◽  
Femtosecond Laser Pulse ◽  
Probe Pulse ◽  
Phase Modulation ◽  
Selective Excitation ◽  
Large Bandwidth ◽  
Selective Suppression ◽  
Anti Stokes

Femtosecond coherent anti-Stokes Raman scattering (CARS) spectra from close Raman levels are indistinguishable due to the large bandwidth of the femtosecond laser pulse. In this paper, we propose a scheme to realize high resolution CARS spectra and further the selective suppression and excitation of the Raman levels by phase shaped femtosecond laser pulse. We show that the CARS signals can be narrowed and differentiated by tailoring only the probe pulse. In addition, one or more of the spectra peaks can be suppressed to realize the selective excitation by further scanning the pump pulse with [Formula: see text] or double reverse [Formula: see text] spectral phase modulation.

Field-free molecular alignment by shaping femtosecond laser pulse with cubic phase modulation

2011 ◽  
Vol 84 (1) ◽  
Author(s):  
Shian Zhang ◽  
Chenhui Lu ◽  
Junhui Shi ◽  
Tianqing Jia ◽  
Zugeng Wang ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Femtosecond Laser Pulse ◽  
Phase Modulation ◽  
Molecular Alignment ◽  
Cubic Phase

scholarly journals Controlling population of the molecular rotational state and the alignment theoretically by tailored femtosecond laser pulse

2018 ◽  
Vol 5 (1) ◽  
pp. 171502
Author(s):  
Yunxia Huang ◽  
Shuwu Xu
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Femtosecond Laser Pulse ◽  
Phase Modulation ◽  
Molecular Alignment ◽  
Rotational State ◽  
Relative Excitation

We demonstrate that the population of the molecular rotational state through a stimulated impulsive Raman excitation can be controlled by tailoring the femtosecond laser pulse with a V-style phase modulation. The results show that, by precisely manipulating the modulation parameters, both the odd and even populations of the molecular rotational state can be completely suppressed or reconstructed. Meanwhile, the relative excitation between the odd and even populations can be obtained. Finally, we show that field-free molecular alignment can be controlled due to the modulation of the molecular rotational state populations.

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