Research Projects

Microstructure fibres (MFs) with high nonlinearity are useful in various applications, including the generation of supercontinuum (SC). SC generation is a result of multiple nonlinear processes operating in distinct regimes, resulting in a dramatic broadening of the spectrum of intense light pulses. SC sources have applications in laser spectroscopy, optical tomography, remote sensing, and wavelength division multiplexing in optical communication systems. SC generation has been achieved with pulses of different pulses, ns pulses, and continuous wave pump sources at various wavelengths. Nonlinear effects involved in SC generation depend on the material's dispersion, including self-phase modulation, Raman scattering, phase matching, and soliton fission. Self-phase modulation plays a significant role in ultrashort pulses, while pulse breakup and intrapulse Raman scattering are observed. Numerical and experimental investigations show that both intrapulse Raman scattering and anti-Stokes generation occur early in fibre propagation. Modulation instability (MI) is observed to seed spectral broadening in continuous wave (CW) pumps, and the interaction between MI and SRS plays a crucial role in SC development.