Title :
Noise characteristics of fiber-based optical phase conjugators
Author :
Hedekvist, Per Olof ; Anderson, P.A.
Author_Institution :
Dept. of Microelectron., Chalmers Univ. of Technol., Goteborg, Sweden
fDate :
1/1/1999 12:00:00 AM
Abstract :
This paper presents a theoretical and experimental analysis of the noise characteristics of a fiber based optical phase conjugator. The results are used to derive an expression for the noise figure (NF) of the device. The lowest measured NF is 18 dB, at -15 dB net conversion efficiency. This NF was limited by stimulated Brillouin scattering (SBS) and amplified spontaneous emission from an optical amplifier. Using the experimental parameters, the theoretical values agree well with the measurements, and predicts in our particular case a minimum NF of 10 dB at high conversion efficiencies. Furthermore, we investigate the influence of optical amplifiers before and after the conjugator, and, with all excess noise eliminated, we predict the quantum limit of 3 dB at efficiencies much greater than 100%
Keywords :
multiwave mixing; optical fibre dispersion; optical fibre theory; optical noise; optical phase conjugation; stimulated Brillouin scattering; superradiance; SBS; amplified spontaneous emission; excess noise; experimental parameters; fiber-based optical phase conjugators; high conversion efficiencies; net conversion efficiency; noise characteristics; noise figure; optical amplifier; quantum limit; stimulated Brillouin scattering; Brillouin scattering; Fiber nonlinear optics; Noise measurement; Nonlinear optics; Optical fiber devices; Optical fibers; Optical noise; Optical scattering; Phase noise; Stimulated emission;
Journal_Title :
Lightwave Technology, Journal of
