Abstract
This paper proposes a low polarization- or phase-dependent fiber parametric amplifier system with a clamped output phase, which consists of an orthogonally pumped nonlinear fiber and a fiber loop with a polarization beam splitter. Numerical calculations show that the proposed system exhibits a constant output phase, low insensitive to the signal input phase or polarization state.
Highlights
Phase-sensitive amplifiers (PSAs) based on a parametric interaction between pump and signal lights have unique properties such that only phase-synchronized signal is amplified and the output phase is clamped irrespective of the signal input phase [1]
For obtaining a phase-clamped signal light, the polarization states of the pump and the signal lights should be aligned, and the mean signal light phase should be synchronized to the pump light phase
This paper proposes a parametric amplifier system that outputs a phase-clamped signal light, with low polarization or phase dependency
Summary
Phase-sensitive amplifiers (PSAs) based on a parametric interaction between pump and signal lights have unique properties such that only phase-synchronized signal is amplified and the output phase is clamped irrespective of the signal input phase [1]. These properties can be used to suppress phase noise in phase-modulated signals. For obtaining a phase-clamped signal light, the polarization states of the pump and the signal lights should be aligned, and the mean signal light phase should be synchronized to the pump light phase With this background, this paper proposes a parametric amplifier system that outputs a phase-clamped signal light, with low polarization or phase dependency. The operation of the proposed system is analyzed using nonlinear-coupled equations and is numerically calculated
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