Erbium-doped fiber amplifiers (EDFA's) are revolutionizing both long-distance and distribution based communications. Furthermore, optically-amplified systems can have a manifold increase in the total capacity by incorporating wavelength-division-multiplexing (WDM). However, one difficulty in implementing a WDM system incorporating EDFA's is that the EDFA gain is wavelength dependent whereas the link loss between amplifiers is wavelength independent, resulting in a severe signal-to-noise (SNR) differential between channels after a cascade of EDFA's. Moreover, only single-channel systems can incorporate narrow optical filters after each amplifier to eliminate unwanted amplified spontaneous emission (ASE). In general, it remains ambiguous as to what optimal values should be chosen for the many system variables in an optically-amplified WDM system to maintain a high SNR and a low degree of SNR differential.<>
Guidelines for optimizing system performance for 20 WDM channels propagating through a cascade of EDFAs
Proceedings of LEOS '93 ; 384-385
1993-01-01
234692 byte
Conference paper
Electronic Resource
English
British Library Conference Proceedings | 1993
|Protection of surviving channels in a cascade of pump-loss controllled gain-locked EDFAs
British Library Online Contents | 1998
|Polarizing beamsplitter trims noise in EDFAs
British Library Online Contents | 1996
|Multichannel Amplification in Strongly Pumped EDFAs
British Library Online Contents | 2004
|