Implications of Super-Channels on Colorless, Directionless and Contentionless (CDC) ROADM Architectures

Cost analysis of super-channel based colorless, directionless and contentionless (CDC) ROADM architectures

“…Although flexibility and operational simplicity with flexible grid based CDC ROADMs is appreciated by network operators, they are not widely deployed due to their perceived higher incremental cost over basic ROADM architectures. The earlier publications have shown the network savings with super-channel based CDC ROADM focusing on operational savings [4]. This paper provides the cost analysis of flexible grid based CDC ROADMs and shows that the incremental cost of the CDC feature with super-channels is considerably less than the incremental cost of CDC in wavelength based ROADM.…”

Resource Allocation for Space-Division Multiplexing: Optical White Box Versus Optical Black Box Networking

“…Spectral superchannels have been extensively investigated [24]- [26] for their benefits, such as high-throughput transmission [27], [28], system component integration [29], and reduction in the number of switching devices [30]. Spatial superchannels have recently gained interest [5], [31], and their advantages for enhancing throughput [32] (per fiber) and enabling system component integration, such as replacing several single-mode amplifiers by one multi-mode amplifier [33].…”

Optical network scaling: roles of spectral and spatial aggregation

“…In this paper, we focus on a "route-and-select" ROADM architecture, as shown in Fig. 6, which is colorless, directionless and contentionless [11]. In this architecture, wavelengthselective switches (WSSs) are used on both incoming and outgoing fibers for combining and selecting wavelengths.…”

“…A spectral superchannel is an aggregation of signals conveyed on adjacent carrier frequencies. Spectral superchannels have been studied widely [6][7][8][9], and their benefits for high-throughput transmission [9], system component integration [10], and reduction in the number of switching components [11] have been demonstrated. A spatial superchannel is an aggregation of signals conveyed in the orthogonal spatial dimensions of a multi-core fiber (MCF) or a multimode fiber (MMF).…”