High-resolution demultiplexers based on coupled-resonator effect in cross plasmonic-waveguide structure

2014 ◽  
Vol 28 (30) ◽  
pp. 1450236
Author(s):  
Qihui Ye ◽  
Chen Wang ◽  
Kai Guo ◽  
Wenzhi Chen
Keyword(s):  
Wavelength Division Multiplexing ◽  
Large Scale ◽  
Waveguide Structure ◽  
Plasmonic Waveguide ◽  
Photonic Integration ◽  
Transmission Spectra ◽  
Full Width ◽  
Wavelength Division ◽  
Wavelength Resolution ◽  
Wavelength Demultiplexing

An ultracompact wavelength demultiplexing structure based on the resonator-coupled effect is proposed and demonstrated numerically. The structure consists of a cross plasmonic-waveguide structure with baffles in the output channels, each of which functions as resonator. Due to the strong couplings of different resonators in the structure, a series of continuous sharp transmission spectra occur. This considerably increases the wavelength resolution of wavelength demultiplexing, which is obviously narrower than the full width of the isolated resonator. The proposed structure could be utilized to design of ultracompact wavelength-division multiplexing (WDM) systems for large-scale photonic integration.

scholarly journals Opto-Mechatronics System for Train-Track Micro Deformation Sensing

Sensors ◽  
2021 ◽  
Vol 22 (1) ◽  
pp. 296
Author(s):  
Weibing Gan ◽  
Shiyu Tu ◽  
Yuan Tao ◽  
Lingyun Ai ◽  
Cui Zhang ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Large Scale ◽  
Time Domain Reflectometry ◽  
Wavelength Shift ◽  
Train Track ◽  
Long Distance ◽  
Wavelength Division ◽  
Track System ◽  
Signal Demodulation ◽  
Micro Deformation

In this paper, we proposed and experimentally demonstrated an opto-mechatronics system to detect the micro-deformation of tracks caused by running trains. The fiber Bragg grating (FBG) array acting as sensing elements has a low peak reflectivity of around −40 dB. The center wavelengths were designed to alternate between 1551 nm and 1553 nm at 25 °C. Based on dual-wavelength, wavelength-division multiplexing (WDM)/time-division multiplexing (TDM) hybrid networking, we adopted optical time-domain reflectometry (OTDR) technology and a wavelength-scanning interrogation method to achieve FBG array signal demodulation. The field experimental results showed that the average wavelength shift of the FBG array caused by the passage of the lightest rail vehicle was −225 pm. Characteristics of the train-track system, such as track occupancy, train length, number of wheels, train speed, direction, and loading can be accurately obtained in real time. This opto-mechatronics system can meet the requirements of 600 mm spatial resolution, long distance, and large capacity for monitoring the train-track system. This method exhibits great potential for applications in large-scale train-track monitoring, which is meaningful for the safe operation of rail transport.

Routing in Coloured Sparse Optical Tori by Using Balanced WDM and Network Sparseness

2012 ◽  
Vol 3 (4) ◽  
pp. 52-62
Author(s):  
Risto Honkanen ◽  
Ville Leppänen
Keyword(s):  
Wavelength Division Multiplexing ◽  
Network Architecture ◽  
Large Scale ◽  
Telecommunication Network ◽  
Large Fraction ◽  
Optical Network ◽  
Shortest Paths ◽  
Wavelength Division ◽  
High Bandwidth ◽  
Processor Node

The authors present a WDM (Wavelength-Division Multiplexing) based all-optical network architecture, and study scheduled routing on it. Their architecture can be seen as a communication system of parallel multi-core computer or a large-scale high bandwidth routing switch of e.g., telecommunication network. The goal is to construct such a scalable architecture and a supporting routing protocol for it so that no electro-optical conversions are needed on the routing paths, all packets are routed along one of the shortest paths, processor nodes can inject packets constantly into the network, and all the packets injected into the routing machinery reach their targets without collisions. The authors’ CSOT is a sparse network. A large fraction of the nodes are intermediate nodes instead of processor nodes. Only the processor nodes are sources and sinks of packets. The number of all nodes is and is the number of processor nodes in our construction. For scheduled routing to work, the authors consider routing problems as a set of h-relations. They achieved work-optimal routing of -relations for a reasonable size of . The efficiency of routing is based on routing latency hiding which is made possible by WDM and sparseness based increase bandwidth per processor node.

Hybrid III-V-on-Silicon Microring Lasers

2013 ◽  
Vol 1538 ◽  
pp. 363-369
Author(s):  
Di Liang ◽  
Géza Kurczveil ◽  
Marco Fiorentino ◽  
Sudharsanan Srinivasan ◽  
David A. Fattal ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Wavelength Division Multiplexing ◽  
High Performance ◽  
Large Scale ◽  
Laser Cavity ◽  
Silicon On Insulator ◽  
Wavelength Division ◽  
Hybrid Iii ◽  
Hybrid Silicon ◽  
Silicon Based

ABSTRACTHybrid silicon laser is a promising solution to enable high-performance light source on large-scale, silicon-based photonic integrated circuits (PICs). As a compact laser cavity design, hybrid microring lasers are attractive for their intrinsic advantages of small footprint, low power consumption and flexibility in wavelength division multiplexing (WDM), etc. Here we review recent progress in unidirectional microring lasers and device thermal management. Unidirectional emission is achieved by integrating a passive reflector that feeds laser emission back into laser cavity to introduce extra unidirectional gain. Up to 4X of device heating reduction is simulated by adding a metal thermal shunt to the laser to “short” heat to the silicon substrate through buried oxide layer (BOX) in the silicon-on-insulator (SOI) substrate. Obvious device heating reduction is also observed in experiment.

scholarly journals Integrated On-Chip Nano-Optomechanical Systems

2017 ◽  
Vol 26 (01n02) ◽  
pp. 1740005 ◽  
Author(s):  
Zhu Diao ◽  
Vincent T. K. Sauer ◽  
Wayne K. Hiebert
Keyword(s):  
Wavelength Division Multiplexing ◽  
Large Scale ◽  
Near Field ◽  
Optical Cavity ◽  
Mechanical Device ◽  
Optomechanical Systems ◽  
Wavelength Division ◽  
Recent Developments ◽  
On Chip ◽  
Silicon Based

Recent developments in integrated on-chip nano-optomechanical systems are reviewed. Silicon-based nano-optomechanical devices are fabricated by a two-step process, where the first step is a foundry-enabled photonic circuits patterning and the second step involves in-house mechanical device release. We show theoretically that the enhanced responsivity of near-field optical transduction of mechanical displacement in on-chip nano-optomechanical systems originates from the finesse of the optical cavity to which the mechanical device couples. An enhancement in responsivity of more than two orders of magnitude has been observed when compared side-by-side with free-space interferometry readout. We further demonstrate two approaches to facilitate large-scale device integration, namely, wavelength-division multiplexing and frequency-division multiplexing. They are capable of significantly simplifying the design complexity for addressing individual nano-optomechanical devices embedded in a large array.

scholarly journals Detector-integrated on-chip QKD receiver for GHz clock rates

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Fabian Beutel ◽  
Helge Gehring ◽  
Martin A. Wolff ◽  
Carsten Schuck ◽  
Wolfram Pernice
Keyword(s):  
Wavelength Division Multiplexing ◽  
High Efficiency ◽  
Single Photon ◽  
Photonic Integration ◽  
Secret Key ◽  
Dark Count ◽  
Photon Detectors ◽  
Wavelength Division ◽  
Single Photon Detectors ◽  
On Chip

AbstractQuantum key distribution (QKD) can greatly benefit from photonic integration, which enables implementing low-loss, alignment-free, and scalable photonic circuitry. At the same time, superconducting nanowire single-photon detectors (SNSPD) are an ideal detector technology for QKD due to their high efficiency, low dark-count rate, and low jitter. We present a QKD receiver chip featuring the full photonic circuitry needed for different time-based protocols, including single-photon detectors. By utilizing waveguide-integrated SNSPDs we achieve low dead times together with low dark-count rates and demonstrate a QKD experiment at 2.6 GHz clock rate, yielding secret-key rates of 2.5 Mbit/s for low channel attenuations of 2.5 dB without detector saturation. Due to the broadband 3D polymer couplers the reciver chip can be operated at a wide wavelength range in the telecom band, thus paving the way for highly parallelized wavelength-division multiplexing implementations.

Implementing DWDM Lambda-Grids

2009 ◽  
pp. 661-667
Author(s):  
Marlyn Kemper Littman
Keyword(s):  
Wavelength Division Multiplexing ◽  
Digital Libraries ◽  
Nuclear Physics ◽  
High Performance ◽  
Large Scale ◽  
Complex Problem ◽  
Massive Datasets ◽  
Wavelength Division ◽  
Performance Guarantees ◽  
Shared Network

Unprecedented demand for ultrafast and dependable access to computing Grids contributes to the accelerating use of dense wavelength division multiplexing (DWDM) technology as a Lambda-Grid enabler. In the Lambda-Grid space, the DWDM infrastructure provisions dynamic lambdas or wavelengths of light ondemand to support terabyte and petabyte transmission rates; seamless access to large-scale aggregations of feature-rich resources; and extendible Grid and inter- Grid services with predictable performance guarantees (Boutaba, Golab, Iraqi, Li, & St. Arnaud, 2003). DWDM Lambda-Grids consist of shared network components that include interconnected federations of other Grids, dense collections of computational simulations, massive datasets, specialized scientific instruments, metadata repositories, large-scale storage systems, digital libraries, and clusters of supercomputers (Naiksatam, Figueira, Chiappari, & Bhatnagar, 2005). As a consequence of the convergence of remarkable advances in DWDM technology and high-performance computing, Lambda-Grids support complex problem resolution in fields that include seismology, neuroscience, bioinformatics, chemistry, and nuclear physics. This chapter begins with a discussion of Grid development and DWDM technical fundamentals. In the sections that follow, the role of the virtual organization (VO) in establishing and supporting DWDM Lambda-Grid initiatives; capabilities of the Globus Toolkit (GT) in facilitating Lambda-Grid construction; distinguishing characteristics of Lambda-Grid operations, architectures, and protocols; and major Web services (WS) specifications in the Lambda-Grid space are examined. Descriptions of DWDM Lambda- Grid initiatives and security challenges associated with DWDM Lambda-Grid implementations are presented. Finally, trends in DWDM Lambda-Grid research are introduced.

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