Novel OADM structure for two-fiber unidirectional optical path protection switching ring networks

Lei Zong; Yanhe Li; Hanyi Zhang; Yuanliang Chu; Yili Guo

doi:10.1117/12.402656

9 October 2000 Novel OADM structure for two-fiber unidirectional optical path protection switching ring networks

Lei Zong, Yanhe Li, Hanyi Zhang, Yuanliang Chu, Yili Guo

Proceedings Volume 4225, Optical Interconnects for Telecommunication and Data Communications; (2000) https://doi.org/10.1117/12.402656
Event: Optics and Optoelectronic Inspection and Control: Techniques, Applications, and Instruments, 2000, Beijing, China

Abstract

Wavelength Division Multiplexing (WDM) optical ring network is becoming more and more attractive due to its high capacity and survivability against fiber breaks. At the same time wavelength routing simplifies the node structure by using optical add/drop multiplexer (OADM) and optical cross-connect (OXC) in the network. In the two-fiber unidirectional optical path-protection switching ring (TUPSR) network, two separate OADM equipments are required to add/drop channels from the two fiber-ring simultaneously. Due to this high price, the cost benefit introduced by the WDM systems is reduced. In this paper, a novel OADM structure is proposed and demonstrated for two-fiber unidirectional optical path protection switching ring network. The OADM is designed with only one arrayed- waveguide grating (AWG) multiplexer in a loop-back configuration. Being used in bidirectional mode, the proposed OADM can add and drop any channel to and from both fiber-rings of the TUPSR simultaneously with only one module. As a result it is cost effective. Experimental results show that the degradation observed in the receiver sensitivity is very limit when the proposed OADM module is used in the two-fiber unidirectional optical protection switching ring network to add/drop multiple channels. The restoration time is less than 7 ms, which satisfies the requirement of ITU-T recommendations. Performance of the TUPSR against the two- fiber unidirectional optical line protection switching ring (TULSR) is also analyzed. It can be derived that the TUPSR has better performance compared to the TULSR not only on the transparent-ring circumference but also on the reliability and the simplicity of control.

Citation Download Citation

Lei Zong, Yanhe Li, Hanyi Zhang, Yuanliang Chu, and Yili Guo "Novel OADM structure for two-fiber unidirectional optical path protection switching ring networks", Proc. SPIE 4225, Optical Interconnects for Telecommunication and Data Communications, (9 October 2000); https://doi.org/10.1117/12.402656

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KEYWORDS

Switching

Signal processing

Wavelength division multiplexing

Networks

Switches

Multiplexers

Channel projecting optics

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