Continuum generation in photonic crystal fibres by multi-wavelength amplified sub-nanosecond light pulses

Abstract

We report the results of experimental study of a white-light supercontinuum generation in single-mode air-silica microstructured fibres under sub-nanosecond single and dual wavelength pumping. We show that simultaneous excitation of the microstuctured fibre in its normal and anomalous dispersion regimes using the fundamental and second harmonic signals of a passively Q-switched microchip laser results in extension of the spectral range covered by homogeneous supercontinuum to the UV range up to 375 nm.

Supercontinuum Generation using Mode-Locked picoseconds Pulse Laser

“…Motivated by important applications in precision frequency metrology, initial research efforts on this topic have focused on developing a clear physical understanding of the underlying mechanisms and noise properties of SC generation seeded by femto-second pump pulses, a regime which is now very well-understood [5][6]. Research is now shifting towards detailed studies of the supercontinuum generation using picosecond to nanosecond pulses, or even a continuous wave pump where spectral broadening is initiated in the so-called "long pulse" regime [7]. In this paper, an SC generation is demonstrated using amplified picoseconds pump pulses in a highly * E-MAIL: swharun@um.edu.my nonlinear fiber.…”