Suppression of phase noises with residual-spectra eliminator in circulator-free fiber-grating optical code-division multiple-access network coder/decoder

Jen-Fa Huang
2006 Optical Engineering: The Journal of SPIE  
In this work, transmissive spectral characteristics of fiber Bragg gratings ͑FBGs͒ are applied to construct a circulator-free scheme of an optical code-division multiple-access ͑OCDMA͒ network coder/ decoder ͑codec͒. The unnecessary spectra would accompany the coding chips to arrive at the photodetectors ͑PDs͒ to induce higher phaseinduced intensity noise ͑PIIN͒ and multiple-access interference ͑MAI͒. A residual-spectra eliminator ͑RSE͒ between OCDMA encoder and decoder modules is employed to
more » ... es is employed to remove the unnecessary spectral parts of data so that the PIIN and MAI can be reduced. A simple experiment performed on the basis of transmissive spectral characteristics of FBGs together with RSE is demonstrated to verify the capability of suppressing residual-spectra noise at the PDs. Performance evaluations indicate that using RSE between network codecs can remarkably lower the PIIN effects in the receiver PDs.
doi:10.1117/1.2214707 fatcat:k4tpfjeskbd2nf4plab6aezgme