— The application of physical-layer network coding (PNC) in optical communications is explored. W... more — The application of physical-layer network coding (PNC) in optical communications is explored. We propose and demonstrate a practical optical PNC prototype for multicast protection in optical flow, burst, and packet switching networks. Different from conventional theoretical PNC studies, our pro-posed optical PNC system does not require bit synchronization and can be easily implemented. Index Terms — Fiber protection, multicast network, physical-layer network coding (PNC), polarization multiplexing. I.
We introduce physical-layer network coding (PLNC) technique in a passive optical interconnect (PO... more We introduce physical-layer network coding (PLNC) technique in a passive optical interconnect (POI) architecture for datacenter networks. The implementation of the PLNC in the POI at 2.5 Gb/s and 10Gb/s have been experimentally validated while the gains in terms of network layer performances have been investigated by simulation. The results reveal that in order to realize negligible packet drop, the wavelengths usage can be reduced by half while a significant improvement in packet delay especially under high traffic load can be achieved by employing PLNC over POI.
Thesis (Ph. D.)--Chinese University of Hong Kong, 1997. Includes bibliographical references (p. 1... more Thesis (Ph. D.)--Chinese University of Hong Kong, 1997. Includes bibliographical references (p. 143-158). Microfiche.
Optical performance monitoring is crucial to monitor the network status and signal quality. In th... more Optical performance monitoring is crucial to monitor the network status and signal quality. In this paper, we discuss the requirements and various techniques of network and signal monitoring in next generation optical access networks.
We propose a novel network architecture for WDM-PON which offers 1:1 protection capability. In ca... more We propose a novel network architecture for WDM-PON which offers 1:1 protection capability. In case of any fiber cut between remote node and ONUs, the affected ONU can re-route the wavelength channels via the adjacent ONU.
Conference Proceedings. LEOS'98. 11th Annual Meeting. IEEE Lasers and Electro-Optics Society 1998 Annual Meeting (Cat. No.98CH36243), 1998
ABSTRACT We have proposed and experimentally demonstrated a simple yet practical WDM branching un... more ABSTRACT We have proposed and experimentally demonstrated a simple yet practical WDM branching unit (BU), which can perform optical amplification, wavelength add-drop and fault tolerance functions. The reliability of the long-haul multiwavelength optical transmission systems can greatly be enhanced
CLEO/Pacific Rim 2003. The 5th Pacific Rim Conference on Lasers and Electro-Optics (IEEE Cat. No.03TH8671), 2003
ABSTRACT In this paper, we present a comprehensive study on the robustness of in-band OSNR monito... more ABSTRACT In this paper, we present a comprehensive study on the robustness of in-band OSNR monitoring schemes against PMD. We evaluated the performance of two in-band polarization-assisted OSNR monitoring techniques, namely, polarization-ing and orthogonal delayed-homodyne method.
OFC/IOOC . Technical Digest. Optical Fiber Communication Conference, 1999, and the International Conference on Integrated Optics and Optical Fiber Communication, 1999
We demonstrate a simple and effective fault detection scheme using an amplifier-generated wavelen... more We demonstrate a simple and effective fault detection scheme using an amplifier-generated wavelength sweeping source and some fiber Bragg gratings to identify the fiber fault in an optically amplified branched access network without any dedicated monitoring source
CLEO/Pacific Rim 2003. The 5th Pacific Rim Conference on Lasers and Electro-Optics (IEEE Cat. No.03TH8671), 2003
INTRODUCTION Optical label switching (OLS) is a promising technique for enabling low-latency forw... more INTRODUCTION Optical label switching (OLS) is a promising technique for enabling low-latency forwarding of high-speed optical packets in future packet-based WDM networks. An efficient and robust optical label swapping technique is necessary for practical implementation. ...
CLEO/Pacific Rim 2003. The 5th Pacific Rim Conference on Lasers and Electro-Optics (IEEE Cat. No.03TH8671), 2003
AbstractWe propose and demonstrate a WDM access network with downstream OFSK data and upstream O... more AbstractWe propose and demonstrate a WDM access network with downstream OFSK data and upstream OOK data. A simple and low-cost optical network unit is realized by re-modulating the downstream optical signal power with the upstream data; and the ...
Digest of the 9th International Conference on Optical Internet (COIN 2010), 2010
Downstream RZ-shaped phase modulation is used in single feeder-fiber, re-modulation-based 10-Gb/s... more Downstream RZ-shaped phase modulation is used in single feeder-fiber, re-modulation-based 10-Gb/s WDM-PONs to achieve high extinction-ratio in both downstream/upstream signals. The ONU's delay-interferometer can demodulate downstream signal and simultaneously generate a source for upstream-re-modulation.
— The application of physical-layer network coding (PNC) in optical communications is explored. W... more — The application of physical-layer network coding (PNC) in optical communications is explored. We propose and demonstrate a practical optical PNC prototype for multicast protection in optical flow, burst, and packet switching networks. Different from conventional theoretical PNC studies, our pro-posed optical PNC system does not require bit synchronization and can be easily implemented. Index Terms — Fiber protection, multicast network, physical-layer network coding (PNC), polarization multiplexing. I.
We introduce physical-layer network coding (PLNC) technique in a passive optical interconnect (PO... more We introduce physical-layer network coding (PLNC) technique in a passive optical interconnect (POI) architecture for datacenter networks. The implementation of the PLNC in the POI at 2.5 Gb/s and 10Gb/s have been experimentally validated while the gains in terms of network layer performances have been investigated by simulation. The results reveal that in order to realize negligible packet drop, the wavelengths usage can be reduced by half while a significant improvement in packet delay especially under high traffic load can be achieved by employing PLNC over POI.
Thesis (Ph. D.)--Chinese University of Hong Kong, 1997. Includes bibliographical references (p. 1... more Thesis (Ph. D.)--Chinese University of Hong Kong, 1997. Includes bibliographical references (p. 143-158). Microfiche.
Optical performance monitoring is crucial to monitor the network status and signal quality. In th... more Optical performance monitoring is crucial to monitor the network status and signal quality. In this paper, we discuss the requirements and various techniques of network and signal monitoring in next generation optical access networks.
We propose a novel network architecture for WDM-PON which offers 1:1 protection capability. In ca... more We propose a novel network architecture for WDM-PON which offers 1:1 protection capability. In case of any fiber cut between remote node and ONUs, the affected ONU can re-route the wavelength channels via the adjacent ONU.
Conference Proceedings. LEOS'98. 11th Annual Meeting. IEEE Lasers and Electro-Optics Society 1998 Annual Meeting (Cat. No.98CH36243), 1998
ABSTRACT We have proposed and experimentally demonstrated a simple yet practical WDM branching un... more ABSTRACT We have proposed and experimentally demonstrated a simple yet practical WDM branching unit (BU), which can perform optical amplification, wavelength add-drop and fault tolerance functions. The reliability of the long-haul multiwavelength optical transmission systems can greatly be enhanced
CLEO/Pacific Rim 2003. The 5th Pacific Rim Conference on Lasers and Electro-Optics (IEEE Cat. No.03TH8671), 2003
ABSTRACT In this paper, we present a comprehensive study on the robustness of in-band OSNR monito... more ABSTRACT In this paper, we present a comprehensive study on the robustness of in-band OSNR monitoring schemes against PMD. We evaluated the performance of two in-band polarization-assisted OSNR monitoring techniques, namely, polarization-ing and orthogonal delayed-homodyne method.
OFC/IOOC . Technical Digest. Optical Fiber Communication Conference, 1999, and the International Conference on Integrated Optics and Optical Fiber Communication, 1999
We demonstrate a simple and effective fault detection scheme using an amplifier-generated wavelen... more We demonstrate a simple and effective fault detection scheme using an amplifier-generated wavelength sweeping source and some fiber Bragg gratings to identify the fiber fault in an optically amplified branched access network without any dedicated monitoring source
CLEO/Pacific Rim 2003. The 5th Pacific Rim Conference on Lasers and Electro-Optics (IEEE Cat. No.03TH8671), 2003
INTRODUCTION Optical label switching (OLS) is a promising technique for enabling low-latency forw... more INTRODUCTION Optical label switching (OLS) is a promising technique for enabling low-latency forwarding of high-speed optical packets in future packet-based WDM networks. An efficient and robust optical label swapping technique is necessary for practical implementation. ...
CLEO/Pacific Rim 2003. The 5th Pacific Rim Conference on Lasers and Electro-Optics (IEEE Cat. No.03TH8671), 2003
AbstractWe propose and demonstrate a WDM access network with downstream OFSK data and upstream O... more AbstractWe propose and demonstrate a WDM access network with downstream OFSK data and upstream OOK data. A simple and low-cost optical network unit is realized by re-modulating the downstream optical signal power with the upstream data; and the ...
Digest of the 9th International Conference on Optical Internet (COIN 2010), 2010
Downstream RZ-shaped phase modulation is used in single feeder-fiber, re-modulation-based 10-Gb/s... more Downstream RZ-shaped phase modulation is used in single feeder-fiber, re-modulation-based 10-Gb/s WDM-PONs to achieve high extinction-ratio in both downstream/upstream signals. The ONU's delay-interferometer can demodulate downstream signal and simultaneously generate a source for upstream-re-modulation.
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Papers by Chun-kit Chan