TY - GEN
T1 - Hybrid WDM and optical CDMA implemented with M-sequence coded waveguide gratings over fiber-to-the-home network
AU - Huang, Jen Fa
AU - Chang, Yao Tang
AU - Sue, Chuan Ching
AU - Hsu, Che Chih
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2006
Y1 - 2006
N2 - In the last-mile access network, the hybrid wavelength-division multiplexing and optical code-division multiple-access (WDM/OCDMA) scheme for Ethernet passive optical network (the so-called WDM/OCDMA-EPON) is presented over fiber-to-the-home (FTTH) network. In this study, since the FTTH network is characterized by various distance between optical network unit (ONU) and optical line terminal (OLT), the ONU capacity is divided into several groups. Each ONU group is assigned the maximal-length sequence (M-sequence) code which is popularly used for spectral amplitude coding in OCDMA network. By employing the inherent cyclic and free spectral range (FSR) periodic properties of arrayed-waveguide grating (AWG) router, the AWG coder/decoder (codec) is shared by all the ONUs divided various groups with FSR interval range (Δλf). Hence, the number of AWGs is significantly decreased. In addition, compared to the time division multiplexing and wavelength-division multiplexing EPON schemes, the proposed scheme is more flexible, scalable and confidential. The influence of degree of polarization (DOP) is investigated to evaluate the ratio of signal to phase-noise (SNR PIIN). By setting the depolarizer in front of balanced photo-detector, the system performance of simultaneous active ONUs is improved approximating 20% compared to the average DOP of 0.5.
AB - In the last-mile access network, the hybrid wavelength-division multiplexing and optical code-division multiple-access (WDM/OCDMA) scheme for Ethernet passive optical network (the so-called WDM/OCDMA-EPON) is presented over fiber-to-the-home (FTTH) network. In this study, since the FTTH network is characterized by various distance between optical network unit (ONU) and optical line terminal (OLT), the ONU capacity is divided into several groups. Each ONU group is assigned the maximal-length sequence (M-sequence) code which is popularly used for spectral amplitude coding in OCDMA network. By employing the inherent cyclic and free spectral range (FSR) periodic properties of arrayed-waveguide grating (AWG) router, the AWG coder/decoder (codec) is shared by all the ONUs divided various groups with FSR interval range (Δλf). Hence, the number of AWGs is significantly decreased. In addition, compared to the time division multiplexing and wavelength-division multiplexing EPON schemes, the proposed scheme is more flexible, scalable and confidential. The influence of degree of polarization (DOP) is investigated to evaluate the ratio of signal to phase-noise (SNR PIIN). By setting the depolarizer in front of balanced photo-detector, the system performance of simultaneous active ONUs is improved approximating 20% compared to the average DOP of 0.5.
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U2 - 10.1109/ICCCAS.2006.285035
DO - 10.1109/ICCCAS.2006.285035
M3 - Conference contribution
AN - SCOPUS:39749156923
SN - 0780395840
SN - 9780780395848
T3 - 2006 International Conference on Communications, Circuits and Systems, ICCCAS, Proceedings
SP - 1860
EP - 1864
BT - 2006 International Conference on Communications, Circuits and Systems, ICCCAS, Proceedings - Computer, Optical and Broadband Communications, Computational Intelligence
T2 - 2006 International Conference on Communications, Circuits and Systems, ICCCAS
Y2 - 25 June 2006 through 28 June 2006
ER -