Title :
Noise figure of parametric wavelength conversion with quasi-phase-matched LiNbO/sub 3/ waveguide
Author :
Yamazaki, Etsushi ; Takada, Atsushi ; Morioka, Toshio
Author_Institution :
NTT Network Innovation Labs., NTT Corp., Yokosuka
Abstract :
An analytical model of the noise accumulation in a chain of parametric wavelength converters is proposed. Signal-to-noise electrical power ratio is analytically given as a function of node number k in a chained transparent node system that consists of optical amplifiers, parametric wavelength converters, and several loss elements including optical transmission fiber with parameters of pump light excess noise betap, and average photon numbers per unit time of pump light and input signal langnprang, and langn0rang, respectively, and spontaneous emission factor of optical amplifier nsp. The signal-to-noise degrades inversely proportional to node number k with the coefficient defined by NF(1)=2nsp+betaplangn0 rang/langnprang when k is lower than langn0rang/Bo, where Bo represents optical bandwidth. The noise figure dependence on pump light quality betap/langnprang and average photon number of input light langn0rang in a single stage configuration are experimentally evaluated using Er-doped fiber amplifiers and quasi-phase-matched lithium niobate waveguide parametric wavelength conversion
Keywords :
erbium; lithium compounds; optical fibre amplifiers; optical fibre communication; optical fibre losses; optical noise; optical parametric devices; optical phase matching; optical pumping; optical wavelength conversion; spontaneous emission; transparency; Er-doped fiber amplifiers; LiNbO3; LiNbO3 waveguide; average photon numbers; chained transparent node system; loss elements; node number; noise figure; optical amplifiers; optical bandwidth; optical transmission fiber; parametric wavelength conversion; parametric wavelength converters; pump light excess noise; pump light quality; quasiphase matching; signal-to-noise electrical power ratio; spontaneous emission factor; Analytical models; Noise figure; Optical fiber amplifiers; Optical noise; Optical pumping; Optical waveguides; Optical wavelength conversion; Power amplifiers; Semiconductor optical amplifiers; Stimulated emission; Chained system; LiNbO; excess noise; noise figure; parametric; pump noise; quasi-phase-matched (QPM); repeated system; signal-to-noise ratio (SNR); wavelength conversion;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2006.876599
