Abstract
This article reports on a proof of concept demonstration of a recently proposed spatial channel network (SCN) that was conducted over an SCN testbed that comprises low-loss hierarchical optical cross-connect (HOXC) prototypes and four-core multicore fiber links. The HOXC prototypes used in the testbed are based on sub-matrix-switches and core selective switches both implemented with commercially available discrete optical switches. Using these two types of HOXC prototypes, the spatial channel networking including spatial bypassing, spatial add/drop and spectral grooming, spatial-lane change, and spatial-channel (SCh) protection is successfully demonstrated for SChs carrying 100-Gb/s–900-Gb/s optical channels.
Highlights
T HE continuing growth in the amount of Internet traffic keeps fueling an increasing demand for bandwidth in optical networks
We conducted a proof of concept demonstration of a recently proposed spatial channel network (SCN) utilizing an SCN testbed that comprises low-loss HOXC prototypes and four-core multicore fiber (MCF) links
The HOXC prototypes used in the SCN testbed were based on sub-MSs and core selective switch (CSS) both implemented with commercially available discrete optical switches
Summary
T HE continuing growth in the amount of Internet traffic keeps fueling an increasing demand for bandwidth in optical networks. Time division multiplexing required synchronous digital hierarchy cross-connects or optical channel data unit cross-connects, and WDM required reconfigurable optical add drop multiplexers (ROADMs) or wavelength cross-connects (WXCs) According to these observations, it would be natural to introduce spatial channel cross-connects (SXCs) that perform core-level switching to achieve a cost-effective SDM layer. If there is an insufficient amount of traffic between a source/destination pair, the corresponding OCh shares an SCh with other low capacity OChs that have different source/destination pairs by using a WXC for better spatial resource utilization (spectral grooming) This results in the cost-effective transport of OChs with a wide variety of bandwidths and an expanded optical reach for spatially bypassed OChs [3]–[5].
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