Title :
25-GHz-Spaced DWDM-PON With Mitigated Rayleigh Backscattering and Back-Reflection Effects
Author :
Zhao Zhou ; Shilin Xiao ; Tao Qi ; Pingqing Li ; Meihua Bi ; Weisheng Hu
Author_Institution :
Dept. of Electron. Eng., Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
A novel 25-GHz-spaced dense wavelength-division multiplexing passive optical network (DWDM-PON) is proposed to improve the utilization of wavelength resource and mitigate the Rayleigh backscattering (RB) and back-reflection effects. A colorless optical network unit (ONU) is realized by remodulating the downstream (DS) signal via a gain-saturated reflective semiconductor optical amplifier (RSOA). Due to the simple interconnecting architecture at the remote node (RN), the DS and upstream (US) signals in each feed fiber (FF) are carried on different channels. Therefore, the RB and back-reflection effects are significantly reduced. The feasibility and merits of the proposed system are experimentally demonstrated with the error-free transmission of 10-Gb/s DS and 1.25-Gb/s US signals over a 25-km single-mode fiber.
Keywords :
Rayleigh scattering; backscatter; channel spacing; optical communication equipment; optical interconnections; optical modulation; passive optical networks; reflectivity; semiconductor optical amplifiers; wavelength division multiplexing; DWDM-PON; ONU; RSOA; back-reflection effects; bit rate 1.25 Gbit/s; bit rate 10 Gbit/s; colorless optical network unit; dense wavelength-division multiplexing passive optical network; distance 25 km; downstream signal remodulation; error-free transmission; feed fiber; frequency 25 GHz; gain-saturated reflective semiconductor optical amplifier; interconnecting architecture; mitigated Rayleigh backscattering; remote node; single-mode fiber; upstream signals; wavelength resource; Optical attenuators; Optical fibers; Optical network units; Optical receivers; Optical reflection; Optical transmitters; Passive optical networks; Dense wavelength-division multiplexing passive optical network (DWDM-PON); Rayleigh backscattering (RB); reflective semiconductor optical amplifier (RSOA);
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2013.2271717
