Title :
Bidirectional WDM PON using directly modulated lasers for downlink and RSOAs for uplink
Author :
Al-Qazwini, Zaineb ; Kim, Hoon
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore
Abstract :
We demonstrate a cost-effective single-fiber 10-Gbps downlink/2.5-Gbps uplink wavelength-division-multiplexed passive optical network system using a directly modulated laser (DML) and a reflective semiconductor optical amplifier (RSOA). We employ DC-balanced 9B/10B line coding for downstream DML modulation. Not only does this coding greatly improve the performance of the frequency-shift keyed downstream signals, but it also reduces the power fluctuation of the downstream signals injected into the RSOA averaged over the upstream symbol duration, yet having a small overhead of 11%.
Keywords :
frequency shift keying; optical fibre networks; passive optical networks; semiconductor optical amplifiers; wavelength division multiplexing; DC-balanced line coding; RSOA; bidirectional WDM PON; bit rate 10 Gbit/s; bit rate 2.5 Gbit/s; directly modulated laser; directly modulated lasers; downlink; frequency-shift keyed downstream signals; passive optical network system; power fluctuation; reflective semiconductor optical amplifier; uplink; wavelength division multiplexing; Bit error rate; Downlink; Encoding; Frequency shift keying; Receivers; Wavelength division multiplexing;
Conference_Titel :
Photonics Global Conference (PGC), 2010
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-9882-6
DOI :
10.1109/PGC.2010.5706002
