The dependence of the supercontinuum coherence time in water jet on the input radiation intensity

Supercontinuum Induced by Filamentation of Bessel-Gaussian and Laguerre-Gaussian Beams in Water

“…SC has a wide range of applications, such as time-resolved excitation and absorption spectroscopy [45], optical pulse compression [46] and the characterization of laser-induced structural transitions [47], etc. The SC generation induced by femtosecond laser in water has been extensively studied in the past few decades, both experimentally and theoretically [39,[48][49][50][51][52][53][54][55][56]. Quite a few approaches are used to study the property of the SC and to control the SC generation [39,[48][49][50][51][52][53][54][55][56].…”

“…The SC generation induced by femtosecond laser in water has been extensively studied in the past few decades, both experimentally and theoretically [39,[48][49][50][51][52][53][54][55][56]. Quite a few approaches are used to study the property of the SC and to control the SC generation [39,[48][49][50][51][52][53][54][55][56]. For example, the coherence of the SC can be studied by the interference method [39,52].…”

“…For example, the coherence of the SC can be studied by the interference method [39,52]. By manipulating the parameters of femtosecond laser pulses (such as spatial distribution of intensity [48,49], polarization [50] and pulse energy [51], etc. ), doping the water with other matters [53,54], adopting a twocolor scheme [56], the SC generation can be enhanced.…”

Femtosecond filamentation in water studied by the interference of supercontinuum

“…Water stands out among the condensed state media and is widely used in SC generation, for it can generate stable, ultrabroad, high intensity SC at a low cost. Femtosecond filamentation in water and the accompanied SC emission have been extensively studied in the past few decades [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. In water, filamentation regimes mainly are driven by group velocity dispersion, higher-order dispersion and plasma absorption losses [19][20][21][22][23][24].…”

“…Since SC generation results from interaction between ultrashort laser pulses and matters, two main approaches have been adopted to control the SC generation in water: (1) adjusting the parameters of femtosecond laser pulses, and (2) changing the property of water. As for the first approach, by changing the spatial and temporal distribution of laser field [26][27][28], polarization state [29], pulse energy [30], etc., the interaction between laser pulses and water is affected. For example, the ionization rate and efficiency is greatly affected by pulse energy and laser polarization state, and consequently the temporal evolution of the plasmas and laser intensity is affected, leading to SPM effect and affecting the spectral broadening.…”