Investigation of the temporal and amplitude characteristics of the stimulated Raman scattering Stokes components in fiber-optic waveguides using a high-speed camera

A study was made of the temporal structure and of the amplitude characteristics of pulses of stimulated- Raman-scattering (STRS) Stokes and anti-Stokes components appearing in fiber-optic waveguides with quartz and liquid light-transmitting cores and propagating in the forward and backward directions relative to the pump wave. An analysis was made of the influence of the mode structure, dispersion, and losses in the waveguide on the intensity distributions in the STRS components, and also on the duration of the light pulses in the waveguide. It was found that, by using an image-converter streak camera with a time resolution of 2 psec to investigate the STRS process in a fiber-optic waveguide, one could directly observe the dispersion curves of the light-transmitting core and the temporal structure of an STRS pulse during a single laser excitation pulse.