Title :
A Wavelength-Division-Multiplexed Passive Optical Network With Simultaneous Centralized Light Source and Broadcast Capability
Author :
Zhang, Fangzheng ; Fu, Songnian ; Wu, Jian ; Xu, Kun ; Lin, Jintong ; Shum, Ping
Author_Institution :
Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
fDate :
6/1/2010 12:00:00 AM
Abstract :
We propose and experimentally demonstrate a wavelength-division-multiplexed (WDM) passive optical network (PON) architecture with simultaneous centralized light source and broadcast capability. The proposed WDM-PON supports simultaneous delivery of 10-Gb/s broadcast on-off-keying (OOK) signals and 10-Gb/s point-to-point (P2P) differential-phase-shift-keying (DPSK) signals. The broadcast OOK signals are obtained by modulating a part of the P2P DPSK signals to enhance the wavelength utilization efficiency. Then, the two kinds of signals are transmitted to the optical network unit (ONU) through different fiber links, and this configuration guarantees the good transmission performance. At each ONU, a portion of the P2P DPSK signal provides the seeding source for remodulating the upstream 10-Gb/s OOK signal, which avoids the cost of a wavelength-specific laser at each ONU. The performance of the proposed WDM-PON with a symmetrical capacity is comprehensively investigated through both simulation and experiment. The results verify that the proposed WDM-PON scheme is a good candidate to provide broadcast service through the WDM-PON infrastructure.
Keywords :
amplitude shift keying; broadcasting; differential phase shift keying; electro-optical modulation; light sources; optical fibre networks; optical links; optical transmitters; passive networks; phase modulation; wavelength division multiplexing; DPSK signals; OOK signals; WDM-PON; bit rate 10 Gbit/s; broadcast capability; broadcast on-off-keying signals; fiber links; point-to-point differential-phase-shift-keying signals; point-to-point transmission; remodulation; seeding source; simultaneous centralized light source; wavelength utilization efficiency; wavelength-division-multiplexed passive optical network; Broadcasting; Costs; Differential quadrature phase shift keying; Fiber lasers; Light sources; Optical fiber networks; Optical network units; Passive optical networks; WDM networks; Wavelength division multiplexing; Wavelength-division-multiplexed passive optical network (WDM-PON); all-optical broadcast; centralized light source; differential phase-shift keying (DPSK); point-to-point transmission; wavelength reuse;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2010.2049737
