Optimization of DSF- and SOA-based phase conjugators by incorporating noise-suppressing fiber gratings

S.Y. Set, H. Geiger, R.I. Laming, M.J. Cole, L. Reekie
1997 IEEE Journal of Quantum Electronics  
We compare the performance of dispersion-shifted-fibre (DSF) and semiconductor-opticalamplifier (SOA) based phase conjugators for a 10 Gb/s non-return-to-zero system with respect to conversion efficiency, noise figure and distortion. Fibre gratings are used for signal extraction and amplified spontaneous emission (ASE) suppression, allowing closer wavelength spacing and reducing the conjugation noise figure by up to 12 dB. Despite the higher SOA conversion efficiency, both conjugators give
more » ... njugators give similar noise figures with ASE suppression. However, the DSF based conjugator has the advantage of distortion tolerance at higher input power.
doi:10.1109/3.631266 fatcat:4sum3bpylzc2fc4bcrrd4yestm