Abstract
Stimulated Raman scattering of toluene and its mixture with chloroform is studied in liquid-core optical fiber. The results show a remarkably broadened Raman line of the mixture from about 630 nm to 650 nm by a pumping wavelength at 532 nm, which is assigned to the interaction of CH vibrations of the two liquids. The results suggest that interactions between adjacent vibrations can produce strong and wide Raman spectra in liquid-core fiber which may prove a new simple way for supercontinuum generation.
Highlights
Liquid-core fiber was first investigated by Bell Lab in 1970 [1], and immediately caught tense attention
Stimulated Raman scattering of toluene and its mixture with chloroform is studied in liquid-core optical fiber
The results show a remarkably broadened Raman line of the mixture from about 630nm to 650nm by a pumping wavelength at 532nm, which is assigned to the interaction of CH vibrations of the two liquids
Summary
Liquid-core fiber was first investigated by Bell Lab in 1970 [1], and immediately caught tense attention. Thanks to the unique advantages of liquids such as high nonlinear and tunable property, this kind of fiber has been extensively studied. Because of the small interaction area and long interaction length, significantly strong and remarkable SRS spectra are produced in fiber which provides wide applications in nonlinear optics like laser modeling, supercontinuum generation, infrared or ultraviolet light generation and so on [13,14,15,16]. As Raman spectroscopy offers a direct approach to study the structures and interactions of molecules, it should become a powerful method to investigate solvent/solute interactions in liquid-core fiber
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