7,114 resources related to Optical losses
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2021 IEEE Photovoltaic Specialists Conference (PVSC)
Photovoltaic materials, devices, systems and related science and technology
2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting
The joint meeting is intended to provide an international forum for the exchange of information on state of the art research in the area of antennas and propagation, electromagnetic engineering and radio science
ECTC is the premier international conference sponsored by the IEEE Components, Packaging and Manufacturing Society. ECTC paper comprise a wide spectrum of topics, including 3D packaging, electronic components, materials, assembly, interconnections, device and system packaging, optoelectronics, reliability, and simulation.
The PCIC provides an international forum for the exchange of electrical applications technology related to the petroleum and chemical industry. The PCIC annual conference is rotated across North American locations of industry strength to attract national and international participation. User, manufacturer, consultant, and contractor participation is encouraged to strengthen the conference technical base. Success of the PCIC is built upon high quality papers, individual recognition, valued standards activities, mentoring, tutorials, networking and conference sites that appeal to all.
The Conference focuses on all aspects of instrumentation and measurement science andtechnology research development and applications. The list of program topics includes but isnot limited to: Measurement Science & Education, Measurement Systems, Measurement DataAcquisition, Measurements of Physical Quantities, and Measurement Applications.
Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.
The Transactions on Biomedical Circuits and Systems addresses areas at the crossroads of Circuits and Systems and Life Sciences. The main emphasis is on microelectronic issues in a wide range of applications found in life sciences, physical sciences and engineering. The primary goal of the journal is to bridge the unique scientific and technical activities of the Circuits and Systems ...
Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.
Covers topics in the scope of IEEE Transactions on Communications but in the form of very brief publication (maximum of 6column lengths, including all diagrams and tables.)
IEEE Communications Magazine was the number three most-cited journal in telecommunications and the number eighteen cited journal in electrical and electronics engineering in 2004, according to the annual Journal Citation Report (2004 edition) published by the Institute for Scientific Information. Read more at http://www.ieee.org/products/citations.html. This magazine covers all areas of communications such as lightwave telecommunications, high-speed data communications, personal communications ...
IEEE Transactions on Communications, 2007
<para> In order to meet the requirements of real-time applications, optical burst switched backbone networks need to provide quantitative edge-to-edge loss guarantees to traffic flows. For this purpose, there have been several proposals based on the relative differentiation quality of service (QoS) model. However, this model has an inherent difficulty in communicating information about internal network states to the edge ...
Communication Systems Principles Using MATLAB, None
This chapter deals with the basic principles of telecommunication transmission systems, which employ wired cabling, wireless or radio signals, and fiber‐optic light transmission, and explains the salient points of each approach. It helps the reader to understand the importance of frequency and bandwidth in relation to a telecommunication system. The chapter also deals with various digital line codes used for ...
Wavelength Division Multiplexing: A Practical Engineering Guide, None
Wavelength division multiplexing (WDM) transmission heavily depends on the fiber type that is used, and the related transmission effects and characteristics. Single‐mode fibers are transmission systems that show frequency dependence (i.e., the pulse response is not the Dirac delta function), time variance, and weak nonlinear behavior. The resulting transmission impairments are as follows: Linear effects such as, attenuation (intrinsic loss, ...
Fiber Optic Test Equipment and Testing Fiber Optic Links - Testing Fiber Optic Links, 12/14/2009
In this tutorial we begin by examining the three basic techniques to perform optical loss testing and the need for bi-directional dual wavelength testing. Next, multimode and singlemode testing will be reviewed. This will be followed by a review of how and why to perform basic power level testing of transmitters and receivers and how to document the results for ...
IEEE Photonics Technology Letters, 2006
In this letter, we propose a novel type of air-guiding photonic bandgap fiber, which exhibits an effectively single-mode operation with a low confinement loss over a wide wavelength range, extended from 1460 to 1840 nm. For several realistic structural parameters, the wavelength dependence of the dispersion as well as the confinement loss properties are investigated through a full- vector modal ...
Multi-Level Optimization for Large Fan-In Optical Logic Circuits - Takumi Egawa - ICRC 2018
Multi-Level Optical Weights in Integrated Circuits - IEEE Rebooting Computing 2017
Spatial-Spectral Materials for High Performance Optical Processing - IEEE Rebooting Computing 2017
An Energy-efficient Reconfigurable Nanophotonic Computing Architecture Design: Optical Lookup Table - IEEE Rebooting Computing 2017
On-chip Passive Photonic Reservoir Computing with Integrated Optical Readout - IEEE Rebooting Computing 2017
Demonstration of a Coherent Tunable Amplifier for All-Optical Ising Machines: IEEE Rebooting Computing 2017
Towards On-Chip Optical FFTs for Convolutional Neural Networks - IEEE Rebooting Computing 2017
An Integrated Optical Parallel Multiplier Exploiting Approximate Binary Logarithms - Jun Shiomi - ICRC 2018
Transphorm: GaN Champions
Q&A with Bruce Kraemer: IEEE Rebooting Computing Podcast, Episode 24
Scalable and Reconfigurable Tap-Delay-Line for Multichannel Equalization - Ari Willner - Closing Ceremony, IPC 2018
An IEEE IPC Special Session with Kasia Balakier of UCL
Multiplication with Fourier Optics Simulating 16-bit Modular Multiplication - Abigail Timmel - ICRC 2018
2013 IEEE Alexander Graham Bell Medal
IEEE Magnetics Distinguished Lecture - Mitsuteru Inoue
Optically Interconnected Extreme Scale Computing - Keren Bergman Plenary from the 2016 IEEE Photonics Conference
Real-time Spectrogram Analysis of Continuous Optical Wavefields - José Azaña - Closing Ceremony, IPC 2018
Robust Qubit Manipulation with Integrated Circuits: Optical Computing - Pérola Milman at INC 2019
An Optical Co-Processor for Large-Scale Machine Learning - Laurent Daudet at INC 2019
<para> In order to meet the requirements of real-time applications, optical burst switched backbone networks need to provide quantitative edge-to-edge loss guarantees to traffic flows. For this purpose, there have been several proposals based on the relative differentiation quality of service (QoS) model. However, this model has an inherent difficulty in communicating information about internal network states to the edge in a timely manner for making admission control decisions. In this paper, we propose an absolute QoS framework to overcome this difficulty. The key idea is to offer quantitative loss guarantees at each hop using a differentiation mechanism and an admission control mechanism. The edge-to-edge loss requirement is then translated into a series of small per-node loss probabilities that are allocated to the intermediate core nodes. The framework includes a preemptive differentiation scheme, a node-based admission control scheme, and an edge-to-edge reservation scheme. The schemes are analyzed and evaluated through simulation. It is shown that the framework can effectively offer quantitative edge-to-edge loss guarantees under various traffic conditions. </para>
This chapter deals with the basic principles of telecommunication transmission systems, which employ wired cabling, wireless or radio signals, and fiber‐optic light transmission, and explains the salient points of each approach. It helps the reader to understand the importance of frequency and bandwidth in relation to a telecommunication system. The chapter also deals with various digital line codes used for synchronization, and also explains their purpose. It discusses the nature of a transmission line and shows how standing waves are produced. The chapter explores the general principles of radio propagation, and then explains the method by which antennas transmit or receive a signal. It also explores the principles of optical communications, including light generation, propagation through optical fiber, reception, and synchronization. The chapter applies knowledge of wireless and light propagation to transmission system loss calculations.
Wavelength division multiplexing (WDM) transmission heavily depends on the fiber type that is used, and the related transmission effects and characteristics. Single‐mode fibers are transmission systems that show frequency dependence (i.e., the pulse response is not the Dirac delta function), time variance, and weak nonlinear behavior. The resulting transmission impairments are as follows: Linear effects such as, attenuation (intrinsic loss, bending loss), polarization‐dependent loss (PDL), chromatic dispersion (CD) due to material waveguide, and profile dispersion. These dispersion mechanisms lead to group‐velocity dispersion (GVD) and dispersion slope or higher order CD. Nonlinear effects include self‐phase modulation (SPM), cross‐phase modulation (XPM, IXPM), four‐wave mixing (FWM, IFWM), modulation instability, nonlinear phase noise (NLPN), cross‐polarization modulation (XPolM), stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS). For WDM long‐haul transmission, this chapter considers all these effects and their interactions.
Fiber Optic Test Equipment and Testing Fiber Optic Links - Testing Fiber Optic Links
In this tutorial we begin by examining the three basic techniques to perform optical loss testing and the need for bi-directional dual wavelength testing. Next, multimode and singlemode testing will be reviewed. This will be followed by a review of how and why to perform basic power level testing of transmitters and receivers and how to document the results for future comparison. Next there will be a discussion of testing dissimilar connectors and potential problems with mismatched end polishes on singlemode connectors. The final chapter explains the roles of components causing reflections and how the test to measure the amount of reflectance in a span is performed.
In this letter, we propose a novel type of air-guiding photonic bandgap fiber, which exhibits an effectively single-mode operation with a low confinement loss over a wide wavelength range, extended from 1460 to 1840 nm. For several realistic structural parameters, the wavelength dependence of the dispersion as well as the confinement loss properties are investigated through a full- vector modal solver based on the finite-element method. In particular, we optimize the structure so as to exhibit the following performance: effectively single-mode operation from 1460 to 1840 nm, with corresponding confinement loss of the fundamental air-guided mode of 8.8times10<sup>-5</sup> dB/km, and enhancement of the confinement loss of the higher order mode of 43 dB/m for ten-ring structure
A 1X2 POF splitter based on a Y-branch metal hollow POF coupler design has been developed. The POF splitter has an insertion loss of 5.8 ± 0.2 dB, excess loss of 2.7 dB and coupling ratio of 1∶1. The POF splitter has been tested in a video-over POF system application.
The maximized continuous TEM00output power and optimum output mirror transmission are calculated for a four-level laser assuming spatially uniform pumping of the laser medium. The results are expressed in simple closed forms that depend on the TEM00mode radius, the radius of the gain medium, the absorbed pump power, the threshold absorbed pump power, and the optical loss of the laser resonator.
A description is presented of two designs for monitoring the integrity of a barrier surrounding a location. The concept was originally developed for verifying compliance to a treaty where the barrier was to surround a site containing treaty-limited items. The application of these designs is not limited to treaty verification and might be used to monitor the integrity of vault walls, building and igloo walls, truck and transport container walls, or net barriers partitioning a harbor. The barrier consists of a row of upright columns supporting three horizontal rails. An optical fiber is threaded through the rails and the continuity of the fiber is monitored via a light signal sent through it. The design is intended to detect any breach immediately so that the violator might be caught in the violation act. The equipment should also detect attempts to tamper with the system by inserting a bypass around a portion of the fiber.<<ETX>>
We proposed the dual-waveguide structure (DWS) with spot size converters and demonstrated the monolithic integration of both photodetector (PD) and electroabsorption modulator (EAM) based on the DWS. The coupling loss between the device facet and a lensed fiber was as small as 2.13 dB. The responsivity of PD and the extinction ratio of EAM were 0.58 A/W and 20 dB at -4 V/sub dc/, respectively. From the optical coupling analysis, it was proved that the dual- waveguide scheme provided one of the best solutions for the monolithic integration of optoelectronic devices.
Optical waveguides and devices suffer loss due to a variety of nonuniformities. The calculation of the actual loss is usually involved and requires a fair degree of mathematical sophistication. However, if the goal of the waveguide designer is to minimise loss, a well known universal criterion can determine qualitatively whether loss increases or decreases with the variation in each of the waveguide or device parameters. To demonstrate the simplicity and generality of this criterion, it is applied to examples covering: microbending, pure bending, tapering, sinusoidal deformations (fibre gratings), helical fibres and Y-junctions.<<ETX>>
To specify protocols for the measurement of the peak spatial-average specific absorption rate (SAR) in a simplified model of the head of users of hand-held radio transceivers used for personal wireless communications services and intended to be operated while held next to the ear. It applies to contemporary and future devices with the same or similar operational characteristics as contemporary ...
Revise and develop specifications for preferred methods for measuring and computing external radiofrequency electromagnetic fields to which persons may be exposed. In addition, the document will specify preferred methods for the measurement and computation of the resulting fields and currents that are induced in bodies of humans exposed to these fields over the frequency range of 100 kHz to 300 ...
The project defines a standard for high-speed (>100 Mbps at the physical layer) communication devices via electric power lines, so-called broadband over power line (BPL) devices. This standard uses transmission frequencies below 100 MHz. It is usable by all classes of BPL devices, including BPL devices used for the first-mile/last-mile connection (<1500 m to the premise) to broadband services as ...
For the purpose of providing compatible authentication, authorization, and cryptographic key agreement mechanisms to support secure communication between devices connected by IEEE 802ﾮ Local Area Networks (LANs), this standard a) Specifies a general method for provision of port-based network access control. b) Specifies protocols that establish secure associations for IEEE Std 802.1AEﾙ MAC Security. c) Facilitates the use of industry ...