Title :
Efficient amplification of a broad-band optical signal through stimulated Kerr scattering in a CS2 liquid-core fiber system
Author :
He, Guang S. ; Xu, Gen C.
Author_Institution :
Dept. of Chem., State Univ. of New York, Buffalo, NY, USA
fDate :
1/1/1992 12:00:00 AM
Abstract :
Based on the mechanism of stimulated Kerr scattering of anisotropic molecules in a transparent liquid, a broad-band (~200 Å) ASE (amplified spontaneous emission) signal from a pulsed dye laser amplifier can be significantly amplified by passing through a 2.5 m long CS2 liquid-core hollow fiber system. This system is pumped by ultrashort laser pulses with a pulse duration of 4 or 0.5 ps. The measured amplification factor of the ASE signal after passing through the fiber system can be up to 5×104 in the case of 4 ps pump laser pulses, and 4×105 in the case of 0.5 ps pump pulses. The gain saturation and spatially cascaded effect of the stimulated scattering processes become predominant when the pump intensity level is very high (I0⩾3~4 GW/cm2 )
Keywords :
carbon compounds; fibre optics; high-speed optical techniques; optical Kerr effect; optical pumping; optical saturation; stimulated scattering; superradiance; 0.5 ps; 2.5 m; 200 Å; 4 ps; CS2; amplification factor; amplified spontaneous emission; anisotropic molecules; broad-band optical signal; gain saturation; hollow fiber system; liquid-core fiber system; optical pumping; pulse duration; pulsed dye laser amplifier; pump intensity level; pump laser pulses; spatially cascaded effect; stimulated Kerr scattering; stimulated scattering processes; transparent liquid; ultrashort laser pulses; Fiber lasers; Geometrical optics; Laser excitation; Optical pulses; Optical pumping; Optical scattering; Pulse amplifiers; Pulse measurements; Pump lasers; Stimulated emission;
Journal_Title :
Quantum Electronics, IEEE Journal of
