Title :
Upstream transmission of WDM/OCDM-PON in a loop-back configuration with remotely supplied short optical pulses
Author :
Choi, Yang-Kyu ; Hanawa, Masanori ; Wang, Xiongfei ; Park, Choon-Sang
Author_Institution :
School of Information and Communications, Gwangju Institute of Science and Technology, 261 Cheomdan-gwagiro, Buk-Gu, Gwangju 500-712, South Korea
Abstract :
We propose and experimentally demonstrate upstream transmission in a wavelength division multiplexing/optical code division multiplexing (WDM/OCDM) passive optical network (PON) without using any high-cost devices such as mode-locked lasers or LiNbO3 external modulators. To make optical network units (ONUs) simple, a loop-back transmission of short optical pulses for OCDM in upstream transmission was investigated. The quality of the short optical pulses, remotely supplied via 23 km of single-mode fiber (SMF), was sufficient for 4-chip OCDM encoding at the ONUs.2WDM/4OCDM signals, generated by multiplexing four OCDM signals using the same wavelength as well as another signal with a different wavelength, showed error-free transmission (bit error rate BER < 10–9) over a 23 km SMF at 1.25 Gb/s.
Keywords :
Bit error rate; Code division multiplexing; Optical fiber amplifiers; Optical network units; Optical pulses; Passive optical networks; Wavelength division multiplexing; Optical code division multiplexing(OCDM); Passive optical network (PON); Reflective semiconductoroptical amplifier (RSOA); Short optical pulsesource; Wavelength division multiplexing (WDM);
Journal_Title :
Optical Communications and Networking, IEEE/OSA Journal of
DOI :
10.1364/JOCN.5.000183
