Showing papers on "Banyan switch published in 2017"

High-performance silicon photonic tri-state switch based on balanced nested Mach-Zehnder interferometer.

Abstract: This work proposes a novel silicon photonic tri-state (cross/bar/blocking) switch, featuring high-speed switching, broadband operation, and crosstalk-free performance. The switch is designed based on a 2 × 2 balanced nested Mach-Zehnder interferometer structure with carrier injection phase tuning. As compared to silicon photonic dual-state (cross/bar) switches based on Mach-Zehnder interferometers with carrier injection phase tuning, the proposed switch not only has better performance in cross/bar switching but also provides an extra blocking state. The unique blocking state has a great advantage in applications of N × N switch fabrics, where idle switching elements in the fabrics can be configured to the blocking state for crosstalk suppression. According to our numerical experiments on a fully loaded 8 × 8 dilated Banyan switch fabric, the worst output crosstalk of the 8 × 8 switch can be dramatically suppressed by more than 50 dB, by assigning the blocking state to idle switching elements in the fabric. The results of this work can extend the functionality of silicon photonic switches and significantly improve the performance of on-chip N × N photonic switching technologies.

Optical switch architecture

Abstract: An optoelectronic switch for transferring a signal from an input device for an output device, the optoelectronic switch including: a plurality of leaf switches, each having a radix R , and arranged in an L -dimensional array, in which the i -th dimension has a size R i where ( i = 1, 2,..., L ) and for a reduced dimension, R i is less than for all of the other dimensions, each leaf switch having an associated L -tuple of coordinates ( x 1 ,..., x L ) giving its location with respect to each of the L dimensions; wherein each leaf switch is a member of L sub-arrays, each of the L sub-arrays associated with a different one of the L dimensions, and including: a plurality of R i leaf switches whose coordinates differ only in respect of the i -th dimension, each leaf switch having C client ports for connecting to an input device or an output device.

Performance Analysis of $f$ -Cast Crosstalk-Free Optical Banyan Networks

Abstract: Banyan networks serve as a class of important switching network architecture, whose multicast capability is critical for future high-performance switches to support multicast-intensive applications. The available literature indicates that, in order to construct optical multicast banyan networks based on the directional coupler (DC) technology, a high-hardware cost is usually involved to ensure the nonblocking property. In this paper, we conduct blocking probability analysis for such networks to explore the inherent tradeoff between blocking probability and hardware cost. In particular, we focus on a class of DC-based optical networks built on the replicated banyan network (RBN) architecture, and develop a theoretical upper bound on blocking probability for such networks under the general $f$ -cast traffic, which covers the unicast and multicast as special cases. This bound captures the overall blocking behavior of $f$ -cast optical RBN networks and agrees with the conditions of strictly nonblocking $f$ -cast optical RBN networks. The proposed bound is significant because it provides a fundamental guideline to achieve the desirable tradeoff between blocking probability and hardware cost. This paper shows that the hardware cost of an $f$ -cast optical RBN network can be dramatically reduced if a small blocking probability is allowed.

A method to optimizing optical switch topology for photonic network-on-chip

Abstract: We propose a method to optimize the optical switch by substituting some of the switch elements with crossings so that the topology can be simplified and the insertion loss can also be effective minimized. A six-port optical switch prototype is designed and fabricated on silicon.