Browsing by Keywords "Optical communication"
Now showing items 1-20 of 26
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45 GHz bandwidth-efficiency resonant cavity enhanced ITO-Schottky photodiodes
(Optical Society of America, 2001)We demonstrated high-performance resonant cavity enhanced ITO-Schottky photodiodes. We achieved a peak efficiency of 75% around 820 nm with a 3-dB bandwidth of 60 GHz resulting in a bandwidth-efficiency product of 45 GHz. -
Adaptive and efficient nonlinear channel equalization for underwater acoustic communication
(Elsevier B.V., 2017)We investigate underwater acoustic (UWA) channel equalization and introduce hierarchical and adaptive nonlinear (piecewise linear) channel equalization algorithms that are highly efficient and provide significantly improved ... -
Comparison of local and global computation and its implications for the role of optical interconnections in future nanoelectronic systems
(Elsevier, 1993)Various methods of simulating diffusion phenomena with parallel hardware are discussed. In particular methods are compared requiring local and global communication among the processors in terms of total computation time. ... -
Complex signal recovery from two fractional Fourier transform intensities: order and noise dependence
(Elsevier, 2005-01)The problem of recovering a complex signal from the magnitudes of two of its fractional Fourier transforms is addressed. This corresponds to phase retrieval from the transverse intensity profiles of an optical field at two ... -
Design of translucent optical networks: Partitioning and restoration
(Kluwer, 2004)We discuss the problem of designing translucent optical networks composed of restorable, transparent subnetworks interconnected via transponders. We develop an integer linear programming (ILP) formulation for partitioning ... -
Differentiated ABR: A new architecture for flow control and service differentiation in optical burst switched networks
(2005)In this paper, we study a new control plane protocol, called Differentiated ABR (D-ABR), for flow control and service differentiation in optical burst switched networks. Using D-ABR, we show using simulations that the ... -
Dual-frequency division de-multiplexer based on cascaded photonic crystal waveguides
(Elsevier, 2012-02-28)A dual-frequency division de-multiplexing mechanism is demonstrated using cascaded photonic crystal waveguides with unequal waveguide widths. The de-multiplexing mechanism is based on the frequency shift of the waveguide ... -
High-performance 1.55 μm resonant cavity enhanced photodetector
(2002)A high speed and high efficiency resonant cavity enhanced InGaAs based photodetector was demonstrated. A peak quantum efficiency of 66% was measured along with 31 GHz bandwidth with the device. The photoresponse was found ... -
High-speed 1.3 μm GaAs internal photoemission resonant cavity enhanced photodetector
(IEEE, Piscataway, NJ, United States, 2000)Photoresponse measurements were carried out in the 1100-1500 nm range by using a single-pass monochromator and a tungsten-halogen projection lamp as the light source. Further, high-speed measurements were made with an ... -
High-speed GaAs-based resonant-cavity-enhanced 1.3-μm photodetector
(SPIE, 2000)High-speed photodetectors operating at 1.3 and 1.55 μm are important for long distance fiber optic based telecommunication applications. We fabricated GaAs based photodetectors operating at 1.3 μm that depend on internal ... -
High-speed resonant-cavity-enhanced Schottky photodiodes
(IEEE, Piscataway, NJ, United States, 1998)The top-illuminated Schottky photodiodes were fabricated by a microwave-compatible monolithic microfabrication process. Fabrication started with formation of ohmic contacts to n+ layers. Mesa isolation was followed by a ... -
Homodyne detection of multimode optical signals
(Bilkent University, 1991)The feasibility of coherent hoinodyne detection for multimode optical sources is experimentally investigated. By employing the self-homodyne detection, it is observed that a considerable amount of mixing can take place ... -
Maximum likelihood estimation of Gaussian mixture models using particle swarm optimization
(IEEE, 2010)We present solutions to two problems that prevent the effective use of population-based algorithms in clustering problems. The first solution presents a new representation for arbitrary covariance matrices that allows ... -
Optical restoration at the wavelength-multiplex-section level in WDM mesh networks
(Institute of Electrical and Electronics Engineers, 1998-09)In the presence of rapidly growing demand, long-haul multiwavelength lightwave networks face the increasingly critical task of not only transporting large traffic volumes, but also of restoring them in the event of failures. ... -
The optimal electromagnetic carrier frequency balancing structural and metrical information densities with respect to heat removal requirements
(1992)The use of higher electromagnetic carrier frequencies for communication in a computing results in both increased spatial information density and larger available modulation bandwidth. However, assuming that the communication ... -
Performance of WDM transport networks
(Institute of Electrical and Electronics Engineers, 1998-08)Wavelength division multiplexed point-to-point transport is becoming commonplace in wide area networks. With the expectation that the next step is end-to-end networking of wavelengths (in the optical domain without conversion ... -
Regenerator location problem and survivable extensions: a hub covering location perspective
(Elsevier, 2015)In a telecommunications network the reach of an optical signal is the maximum distance it can traverse before its quality degrades. Regenerators are devices to extend the optical reach. The regenerator placement problem ... -
Research on optical core networks in the e-Photon/ONe network of excellence
(2006)This papers reports the advances in Optical Core networks research coordinated in the framework of the e-Photon/ONe and e-Photon/ONe+ networks of excellence. -
Space-bandwidth product of conventional Fourier transforming systems
(Elsevier, 1993-12-15)It is shown that the space-bandwidth product of conventional "2f" Fourier transforming configurations can be increased without bound by increasing the diameter D and focal length fof the lens simultaneously to Docf 3/4. ... -
Study of strong turbulence effects for optical wireless links
(S P I E - International Society for Optical Engineering, 2012)Strong turbulence measurements that are taken using real time optical wireless experimental setups are valuable when studying the effects of turbulence regimes on a propagating optical beam. In any kind of FSO system, for ...
