Temperature-assisted broadly tunable supercontinuum generation in chalcogenide-glass-based capillary optical fiber

We propose an alternative technique for generating a tunable supercontinuum in a liquid-filled chalcogenide capillary optical fiber exhibiting three zero-dispersion wavelengths. To investigate the tunable supercontinuum, a nonlinear Schrödinger equation is solved to understand the soliton pulse dynamics. Utilizing temperature-assisted dispersion tailoring, the generation of dispersive waves that are tunable within a broad wavelength range of 3630–4650 nm and 2230–2560 nm is reported, with detailed investigations of various spectrograms confirming the predictions of dispersive waves through phase-matching characteristics. Also, temperature-controlled soliton spectral tunneling is numerically predicted in the same fiber and depends on the spectral width of the normal dispersion region between two anomalous regions.