Conical emission by femtosecond pulses with different spectral bandwidths

Li, Yuexun; Ji, Zhongqing; Liu, Jiansheng; Zhang, Zhinan; Ge, Xiaochun; Li, Xiaofang; Li, Ruxin; Xu, Zhizhan

doi:10.1016/j.optcom.2008.05.050

Cited by 7 publications

(2 citation statements)

References 22 publications

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“…A white light continuum probe, with wavelengths ranging from 380 to 950 nm, was generated by focusing ( f = 100 mm) a portion of the main beam (800 nm, ∼0.3 µJ/pulse) into distilled water in a 5 mm thick cuvette. The outer rim of the probe beam was cut because only the central part of the WLC showed up as stable and broad spectrum [15]. Then the central part of WLC was focused to 500 µm diameter at a position of target sample and was intersected with the spatially homogeneous part of the pump cross section.…”

Section: Methodsmentioning

confidence: 99%

Chirp-independent time-resolved spectroscopy using the self-reference method

et al. 2014

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We present a simple method for compensating a chirp of a white light continuum for femtosecond time-resolved spectroscopy. The quantity of the chirp was directly measured by referring to rising step of transient absorption time evolutions of a target material (polythiophene-fullerene thin organic blend film) itself. The analyzed chirp information in this manner was used for a correction procedure; each wavelength of the chirped white light continuum was correlated to an optical delay stage position for calibrating exactly with respective zero-delays. Consequently, it was possible to simultaneously measure both ultrafast kinetics and chirp independent time-resolved spectra with this method.

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Section: Methodsmentioning

confidence: 99%

Chirp-independent time-resolved spectroscopy using the self-reference method

et al. 2014

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“…The producing of axial-symmetric colored rings shows the specific feature of the laser beam experience nonlinear transformation in the process of filamentation. This attractive nonlinear effect was demonstrated experimentally in a variety of media, including gases [1][2][3][4], solids [5][6][7][8], and liquids [5,9,10]. CE has aroused strong interests and has been extensively studied, while this is not an entirely understood phenomenon.…”

Section: Introductionmentioning

confidence: 94%

Angular feature of conical emission in an isotropic amorphous medium pumped by femtosecond pulses

2011

Front. Optoelectron. China

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Broadband parametric upconverted conical emission (CE) has been investigated in an isotropic amorphous medium pumped by femtosecond laser pulses, which covers a broad range from 470 to 630 nm. Three theoretical models were analyzed to interpret the angular beam of CE. The CE spectra and their angular positions have been experimentally measured, which can be explained well by nonlinear X-wave model and Cerenkov type phase matching model rather than four-wave mixing (FWM) model.

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