Showing papers on "Banyan switch published in 2010"
TL;DR: In this article, a novel 2×2 optical switch is proposed using phase spatial light modulator (PSLM), polarizing beam splitter (PBS) and mirror, which has the advantages of relatively low crosstalk and insertion loss, compact and simple construction, higher performance and cost effectiveness.
Abstract: Optical switches play an important role in all optical communication networks and multiprocessor computer systems. The 2×2 and 4×4 optical switches are the basic units of large-scale switch matrices. Using a conventional polarization control method, the optical switch system and structure is optimized, and a novel optical switch is proposed, which has the advantages of relatively low crosstalk and insertion loss, compact and simple construction, higher performance and cost effectiveness. First, a novel 2×2 optical switch is proposed using phase spatial light modulator (PSLM), polarizing beam splitter (PBS) and mirror. This configuration uses fewer optical components, is compact in structure, efficient in performance, and insensitive to polarization of the signal beam. Second, a new optical experimental module of 4×4 optical switch is presented by cascading a 2×2 optical switch. The routing method of polarization-independent bidirectional 4×4 optical switch is investigated. Finally, the operational characteristics of the polarization-independent bidirectional 2×2 and 4×2 optical switches are discussed in detail.
12 citations
01 Dec 2010
TL;DR: In this paper, a 1 × 2 switch based on a Mach-Zehnder interferometer (MZI) was designed for optical communications and photonic integrated circuits (PICs).
Abstract: Optical switches are important for applications in optical communications and photonic integrated circuits (PICs) to allow for selection of optical paths. In this work, a thermo-optic switch based on a Mach-Zehnder interferometer (MZI) is designed. A comparison and optimization of the switch components, including beam splitters, couplers and MZI, is carried out. A 1 × 2 switch using silicon nitride waveguides is designed with small footprint size, low insertion loss and high extinction ratio. The switch is compatible with CMOS fabrication technology, making it suitable for a wide range of applications.
1 citations
01 Jan 2010
TL;DR: The hardware iterative decoder for a subclass of LDPC codes that are implementation oriented, known also as Architecture Aware LDPC, has been designed in the form of synthesizable VHDL description and synthesis results show significant decrease of decoder area in the second case.
Abstract: Low-Density Parity-Check codes are one of the best modern error-correcting codes due to their excellent error-correcting performance and highly parallel decoding scheme. This article concerns the hardware iterative decoder for a subclass of LDPC codes that are implementation oriented, known also as Architecture Aware LDPC. The parameterizable decoder has been designed in the form of synthesizable VHDL description. Implementation in Xilinx FPGA devices achieves throughput nearly 100Mb/s. Significant part of the decoder area is occupied by Configurable Interconnection Network. The network consists of a set of multiplexers that propagate the data from memory to the computation units. Behavioral description of the interconnection network gives quite poor synthesis results: decoder area is large and exponentially dependent on the number of inputs / outputs. Instead of straightforward behavioral description, the switching network can be described structurally making use of ideas known from theory of telecommunication interconnection networks: Benes or Banyan switches. In this article 1 present in detail the interconnection network implementation based on Banyan switch with additional multiplexer stage to enable non-power-of-2 numbers of outputs. Comparison of synthesis results for the network obtained by synthesis of behavioral description as well as the Banyan structural description shows significant decrease of decoder area in the second case.
21 Mar 2010
TL;DR: Novel type of wavelength-insensitive monolithically integrated InP 1×N switch is developed using optical phased-array architecture and application to 320-Gbps WDM optical packet switching is demonstrated.
Abstract: Novel type of wavelength-insensitive monolithically integrated InP 1×N switch is developed using optical phased-array architecture. Low-polarization-dependent 1×8 switch, 1×16 switch, and application to 320-Gbps WDM optical packet switching are demonstrated.