Results 11 to 20 of about 68,738 (219)

Novel structure of optical add/drop filters and multi-channel filter based on photonic crystal for using in optical telecommunication devices

open access: closedJournal of Optoelectronical Nanostructures, 2019
In this paper, Using a 2D photonic crystal and a novel square ring resonator,several compact and simple structures have been introduced in the present paper toconstruct optical add/drop filters and multi-channel filter. The difference structures hasbeen designed and simulated by using the proposed square ring resonator and differentdropping waveguides.
Vahid Fallahi, Mahmood Seifouri
openaire   +2 more sources

Specification of multiparty audio and video interaction based on the Reference Model of Open Distributed Processing [PDF]

open access: yes, 1994
The Reference Model of Open Distributed Processing (RM-ODP) is an emerging ISO/ITU-T standard. It provides a framework of abstractions based on viewpoints, and it defines five viewpoint languages to model open distributed systems.
Gay, V.C.J.   +3 more
core   +17 more sources

A high-resolution burst-mode laser transmitter with fast and accurate level monitoring for 1.25 Gb/s upstream GPONs [PDF]

open access: yes, 2005
A
Bauwelinck, Johan   +6 more
core   +2 more sources

A New Design Methodology For Enhancing The Transient Loading Of Low Drop-out Regulators (LDRs)

open access: yesInternational Journal of Electronics and Telecommunications, 2019
A new simple design methodology which makes LDR output nearly insensitive to jumps of the load current for long times is proposed. This methodology is tested for more than 104 seconds. Our procedure leans on cross coupling of the time second derivative of the LDR power transistor gate and drain voltages along with their currents.
Ahmed Abd_Monem Afifi   +2 more
openaire   +2 more sources

Two-Way Optical Frequency Comparisons Over 100km Telecommunication Network Fibers [PDF]

open access: yes, 2014
By using two-way frequency transfer, we demonstrate ultra-high resolution comparison of optical frequencies over a telecommunication fiber link of 100 km operating simultaneously digital data transfer.
Amy-Klein, Anne   +5 more
core   +2 more sources

Empirical Analysis of Chirp and Multitones Performances with a UWB Software Defined Radar: Range, Distance and Doppler [PDF]

open access: yes, 2014
In this study, a protocol for an unbiased analysis of radar signals' performance. Using a novel UWB software-defined radar, range profile, Doppler profile and detection range are evaluated for both Linear Frequency Modulated pulse and Multitones.
Gray, Derek   +2 more
core   +1 more source

Multiclass scheduling algorithms for the DAVID metro network [PDF]

open access: yes, 2004
—The data and voice integration over dense wavelength-division-multiplexing (DAVID) project proposes a metro network architecture based on several wavelength-division-multiplexing (WDM) rings interconnected via a bufferless optical switch called Hub. The
Andrea Bianco   +8 more
core   +2 more sources

Excitability and optical pulse generation in semiconductor lasers driven by resonant tunneling diode photo-detectors [PDF]

open access: yes, 2013
We demonstrate, experimentally and theoretically, excitable nanosecond optical pulses in optoelectronic integrated circuits operating at telecommunication wavelengths (1550 nm) comprising a nanoscale double barrier quantum well resonant tunneling diode ...
Balle, Salvador   +5 more
core   +1 more source

Power consumption evaluation of circuit-switched versus packet-switched optical backbone networks [PDF]

open access: yes, 2013
While telecommunication networks have historically been dominated by a circuit-switched paradigm, the last decades have seen a clear trend towards packet-switched networks. In this paper we evaluate how both paradigms perform in optical backbone networks
Colle, Didier   +6 more
core   +1 more source

High definition H.264/AVC subjective video database for evaluating the influence of slice losses on quality perception [PDF]

open access: yes, 2013
Prior to the construction or validation of objective video quality metrics, ground-truth data must be collected by means of a subjective video database.
De Turck, Filip   +4 more
core   +2 more sources

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