Affiliation:
1. MCKV Institute of Engineering
Abstract
A highly nonlinear single-mode anomalous dispersion silicon core fiber (SCF) is
suitably designed and optimized to generate a high repetition rate
pulse train in the temporal domain from a single input pulse at a
sufficiently shorter optimum length in comparison to silica-based
standard fibers used for the same purpose. The large amount of
Kerr-induced nonlinearity of a SCF is effectively utilized here such
that input Gaussian pulses or pulse trains transform into a highly
repetitive temporal multiplet. The effects of free-carrier
generation-induced change in absorption and dispersion are included
while studying the nonlinear pulse propagation through the SCF. To
declare the generated pulse as a superior-graded triplet, a
Q
parameter, as a function of relative
pulse parameters of the individual pulses of a triplet, is defined for
the first time, to the best of our knowledge. Different pulse
parameters are thoroughly optimized as well as the effect of external
gain is examined from the perspective of requirement of shorter fiber
length and development of quality triplets. Finally, the work is
further extended for the formation of quadruplet pulses by the same
type of SCF. It is to be mentioned here that such a methodical study
for the generation of a temporal multiplet using a semiconductor core
fiber has not been reported earlier.
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering