Title :
40-Gb/s Time-Division-Multiplexed Passive Optical Networks Using Downstream OOK and Upstream OFDM Modulations
Author :
Yeh, Chien-Hung ; Chow, Chi-Wai ; Hsu, Chih-Hung
Author_Institution :
Inf. & Commun. Res. Labs., Ind. Technol. Res. Inst., Hsinchu, Taiwan
Abstract :
In this investigation, we first propose and investigate a 40-Gb/s time-division-multiplexed passive optical network (TDM-PON) using four wavelength-multiplexed signals in both downstream and upstream traffic. Here, each downstream signal uses 10-Gb/s on-off keying (OOK) format encoded by a Mach-Zehnder modulator (MZM) in 1.5-??m band. And each upstream channel utilizes the highly spectral efficient 10-Gb/s orthogonal frequency-division-multiplexing quadrature amplitude modulation (OFDM-QAM) generated by directly modulating a 1.3-??m laser. Based on the proposed scheme, 40-Gb/s data traffic in a TDM-PON can be obtained easily by using four wavelength-multiplexed channels. In addition, the performance of the proposed PON architecture has also been discussed.
Keywords :
OFDM modulation; amplitude shift keying; optical fibre networks; quadrature amplitude modulation; telecommunication channels; telecommunication traffic; time division multiplexing; Mach-Zehnder modulator; OFDM-QAM; TDM-PON; bit rate 10 Gbit/s; bit rate 40 Gbit/s; downstream OOK; downstream traffic; on-off keying; orthogonal frequency division multiplexing; orthogonal frequency-division-multiplexing quadrature amplitude modulation; time-division-multiplexed passive optical networks; upstream OFDM modulations; upstream traffic; wavelength 1.3 mum; wavelength 1.5 mum; wavelength-multiplexed channels; wavelength-multiplexed signals; 40 Gb/s; on–off keying (OOK); orthogonal frequency-division multiplexing (OFDM); passive optical network (PON); wavelength-division multiplexing (WDM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2009.2036740
