Title :
Noise characteristics of fiber optical parametric amplifiers
Author :
Kylemark, Per ; Hedekvist, Per Olof ; Sunnerud, Henrik ; Karlsson, Magnus ; Andrekson, Peter A.
Author_Institution :
Dept. of Microelectron., Chalmers Univ. of Technol., Goteborg, Sweden
Abstract :
We derive an analytical theory for the noise figure of an undepleted and lossless fiber optical parametric amplifier (FOPA). Both the signal and the wavelength converted idler are investigated. Our theory is applicable for both an ideal pump power source, as well as a noisy one. We find that a noisy pump source can severely degrade the performance at high gain due to the stochastic gain-variations the signal and idler will experience. The theory is compared with Monte Carlo simulations of the FOPA and an excellent agreement is obtained. Simulations in the gain-depleted region show the possibility to reach below quantum-limited, phase-insensitive amplification for single channel transmission.
Keywords :
optical fibre losses; optical noise; optical parametric amplifiers; optical pumping; optical wavelength conversion; quantum noise; spontaneous emission; stochastic processes; ASE; Monte Carlo simulations; amplified spontaneous emission; fiber optical parametric amplifiers; gain-depleted region; ideal pump power source; noise characteristics; noise figure; noisy pump source; optical parametric amplifier; phase-insensitive amplification; quantum noise; quantum-limited amplification; signal; single channel transmission; stochastic gain-variations; wavelength converted idler; Noise figure; Optical fiber amplifiers; Optical fiber losses; Optical fiber theory; Optical fibers; Optical noise; Optical pumping; Optical wavelength conversion; Semiconductor optical amplifiers; Stimulated emission;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2003.822152
