Spectral Hump Formation in Visible Region of Supercontinuum from Shaped Femtosecond Laser Filamentation in Fused Silica

Chang, Junwei; Li, Dongwei; Xi, Tingting; Zhang, Lanzhi; Hao, Zuoqiang

doi:10.3390/photonics8080339

Cited by 2 publications

(1 citation statement)

References 39 publications

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“…For example, the intensity of THz wave that is generated from filament is sensitive to the initial chirp of a laser pulse [170][171][172]. Additionally, spatiotemporal manipulation was presented to improve the peak intensity in the filament core [173,174] and control the intensity of supercontinuum [175]. A more intense and shorter filament can be generated by spatiotemporally focusing a dispersed laser pulse [176,177].…”

Section: Temporal Pulse Shapingmentioning

confidence: 99%

Sensing with Femtosecond Laser Filamentation

Qian

Guo

et al. 2022

Sensors

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Femtosecond laser filamentation is a unique nonlinear optical phenomenon when high-power ultrafast laser propagation in all transparent optical media. During filamentation in the atmosphere, the ultrastrong field of 1013–1014 W/cm2 with a large distance ranging from meter to kilometers can effectively ionize, break, and excite the molecules and fragments, resulting in characteristic fingerprint emissions, which provide a great opportunity for investigating strong-field molecules interaction in complicated environments, especially remote sensing. Additionally, the ultrastrong intensity inside the filament can damage almost all the detectors and ignite various intricate higher order nonlinear optical effects. These extreme physical conditions and complicated phenomena make the sensing and controlling of filamentation challenging. This paper mainly focuses on recent research advances in sensing with femtosecond laser filamentation, including fundamental physics, sensing and manipulating methods, typical filament-based sensing techniques and application scenarios, opportunities, and challenges toward the filament-based remote sensing under different complicated conditions.

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