Abstract:
This thesis describes a novel configuration which implements a polarization
insensitive phase sensitive fiber optic parametric amplifier for phase regeneration.
The proposed design can be used to address the inherent gain degradation issue
in a polarization insensitive phase sensitive amplifier when polarization diversity
loop is incorporated. This research investigates the possibilities for a significant
gain enhancement when the polarization diversity loop is implemented.
At first, a baseline for a phase sensitive amplifier scheme is developed by taking
different parameters into consideration. In this case, an extensive characterization
is carried out to identify the variations of phase sensitive fiber amplifier gain
associated with the parameter changes. Once the baseline is developed, the polarization
diversity loop is implemented in the phase sensitive amplifier in order to
make the phase sensitive fiber amplifier insensitive to polarization state variations
of the input signals. Moreover, the existing issues in the polarization diversity
loop are identified.
Finally, a strategic design is developed to overcome one of the major issues
that persists in the existing polarization diversity loop configurations. It is the
degradation of maximum achievable gain due to not being able to utilize the total
pump power for parametric amplification process as only half of the pump power
is available after polarization splitting at the input of the loop. The proposed
design includes the concatenation of fiber pieces together to explore the possibility
of gain enhancement of the diversity loop. To assess the performance of the
proposed design, an extensive analysis is carried out. The gain enhancement introduced
to the existing system is presented and suggestions are made for further
improvements in the future.
Citation:
Munasinghe, D.R. (2021). Modeling of polarization insensitive phase sensitive amplifier for phase regeneration [Master's theses, University of Moratuwa]. Institutional Repository University of Moratuwa. http://dl.lib.uom.lk/handle/123/21400