Abstract
Wavelength dependence of quantum noise in nondegenerate phase-sensitive
amplification in an optical fiber, where signal and its
phase-conjugated idler lights are incident into a fiber together with
pump light, is theoretically investigated. An analytical formula of
the quantum-limited noise figure, that takes Raman scattering into
account as well as parametric amplification, is derived based on full
quantum mechanical treatment. Using the obtained formula, a
calculation example of the noise figure spectrum is also presented,
where the pump light phase is adjusted so that the signal gain is
maximum at a phase-matched wavelength, supposing multichannel
amplification.
© 2019 Optical Society of
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