Title :
A Centrally Controlled Survivable WDM-PON Based on Optical Carrier Suppression Technique
Author :
Qiu, Yang ; Liu, Zhixin ; Chan, Chun-Kit
Author_Institution :
Dept. of Inf. Eng., Chinese Univ. of Hong Kong, Shatin, China
fDate :
3/15/2011 12:00:00 AM
Abstract :
A simple centrally controlled survivable wavelength-division-multiplexed passive optical network (WDM-PON) architecture employing an optical carrier suppression technique is proposed. Protection switching at the optical line terminal employs electrical switches to control the clock signal for the protection subcarrier generation, via optical carrier suppression. Both distribution and feeder fibers are protected simultaneously. By employing an inverse-return-to-zero format for the downstream transmission and nonreturn-to-zero for the upstream remodulated signal, the optical network units are kept colorless and simple. The 10-Gb/s transmissions under both normal working and protection modes were experimentally demonstrated and traffic restoration time was measured to be about 5 ms.
Keywords :
electro-optical modulation; electro-optical switches; passive optical networks; wavelength division multiplexing; centrally controlled survivable WDM-PON; clock signal; distribution fiber; electrical switches; feeder fiber; inverse-return-to-zero format; optical carrier suppression technique; optical line terminal; optical network unit; protection switching; subcarrier generation protection; traffic restoration time; wavelength division multiplexed passive optical network; Optical carrier suppression; passive optical network (PON); wavelength-division multiplexing (WDM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2107317