Experimental Evaluation of Recovery From Multiple Failures in Multicore Fiber-Based Optical Network


We tend to experimentally investigate recovery from multiple link failures in an exceedingly multicore fiber (MCF) link-primarily based optical network (NW). The NW consists of an input/output interface and a 2-ring structure to achieve high-capacity and highly reliable NWs in access areas. Each node includes a switch (SW) unit consisting of field-programmable gate array (FPGA)-based optical SW units. The SW unit is ready to detect failures and implements a failure recovery theme that monitors signals and secures a restoration path, even when there are multiple link failures. Signal transmission experiments demonstrated that the path could be recovered inside a brief time amount (approximately eight ms), even once multiple failures within the NW. Moreover, performing a second (consecutive) switching once no signal was detected in the first switching for classy multiple failures within the NW additionally led to recovery within a short time amount (approximately 25 ms). These times are sufficiently less than that needed by recovery time commonplace for telecommunication NWs of the Telecommunication Standardization Sector of the International Telecommunication Union (ITU-T). The results indicate that the MCF link would be helpful for increasing the reliability of NWs.

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