Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"optical fiber communication"”.
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Traffic control in a multichannel optical fiber communication network
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1988.
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Multi slot amplitude coding technique for high speed optical fiber communication system
The rapid progress of the high speed optical communications system is driven by the exponential growth of users demand on information and services. The trend towards high speed and high capacity transmission system are multiplexing technique such as electrical time division multiplexing (ETDM) and …
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Quantum well devices fabricated using selective area growth and their application in optical fiber communication
In this thesis we discuss the advantage of the selective area growth (SAG) approach to manufacturing integrated quantum-well lasers and modulators. SAG can be successfully achieved with two major growth techniques: metalorganic chemical vapor deposition (MOCVD) and molecular beam epitaxy (MBE). We …
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Influence of the Number of Degrees of Freedom on the Capacity of Incoherent Optical Fiber Communication Systems
… dissertation is to find the channel capacity in optical fiber communication systems when incoherent detection is used with single (polarization filtering) and two-polarizations (no polarization filtering). Optical fiber systems employ photodetectors that convert optical intensity to electrical …
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Vapor Phase Epitaxial Growth of Gallium Arsenide, Indium Phosphide, and Indium Gallium Arsenide by the Hydride Technique
The use of InGaAsP alloys for optical fiber communication systems is discussed. The advantages and various types of vapor phase epitaxial growth systems are examined before looking at the open tube growth process in detail. Using the criteria for high purity systems, which are thoroughly reviewed, …
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Transimpedance Amplifier (TIA) Design for 400 Gb/s Optical Fiber Communications
Analogcircuit/IC design for high speed optical fiber communication is a fairly new research area in Dr. Ha's group. In the first project sponsored by ETRI (Electronics and Telecommunication Research Institute) we started to design the building blocks of receiver for next generation 400 Gb/s optical …
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Measurements, analysis and modeling of the performance of direct detection receivers with an optical preamplifier
In the last few years, erbium-doped fiber amplifiers (EDFAs) have been investigated extensively both for their superior amplification characteristics and their applicability to future optical fiber communication systems. In the preamplifier configuration, a bandpass filter is required to reduce the …
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Coupled-waveguide Fabry-Perot resonator
… spectral filters find important applications in optical fiber communication systems, particularly in wavelength demultiplexers and single-frequency semiconductor lasers. Conventional Fabry-Perot resonators provide a narrow spectral width but lack the capability of mode discrimination. A new …
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Monolithic Integration of Long Wavelength Photodetectors and High Electron Mobility Transistors on Metamorphic Gallium Arsenide Substrates
… metamorphic GaAs substrates for long-wavelength optical fiber communication applications. The use of a novel double heterostructure employing an InGaAlAs optical impedance matching layer, a chirped InGaAs/InAlAs superlattice graded bandgap layer (SL-GBL), and a large bandgap I-InAlAs drift region …
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Optical Enhancement in Periodic Plasmonic Gratings for SERS and Metal-Semiconductor-Metal Photodetectors (MSM-PDs) Applications
… applications, such as, super lenses, nano-scale optical circuits, optical filters, surface plasmon enhanced photo-detectors solar cells, imaging sensors, charge-coupled devices (CCD), and optical-fiber communication systems. Several parameters, wire widths and thickness, gap space, taper angle, …
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Optical pulse distortion and manipulation through polarization effects and chromatic dispersion
… shaping mechanisms play a significant role in optical fiber communication and sensing. In this thesis we shall investigate techniques which alleviate pulse deterioration due to polarization effects, and utilize large chromatic dispersion for system performance enhancement. We first demonstrate …
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High resolution measurement of telecommunication component polarization mode dispersion by means of quantum interferometry
As optical transport networks migrate towards supporting optical channel (or superchannel) bitrates of 100Gbps, 400Gbps, or even 1 Tbps, it becomes more important to conduct careful analysis, precise characterization, and optimized mitigation of polarization mode dispersion (PMD) in order to …
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Survivability and resilience mechanisms in modern optical fibre systems
Optical fibre networks play an increasingly prominent role in communications. As networks grow in size and complexity, the probability and impact of failures increase. In this dissertation, different optical network concepts, survivability and resilience methods are considered. Link and Path …
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Improvement of Fiber Optic System Performance by Synchronous Phase Modulation and Filtering at the Transmitter
… pulse train, which is shown to be resistant to fiber dispersion. The alternate-sign RZ pulse train is then amplitude modulated with the data before the transmission. Alternate signs between adjacent pulses makes this signal format robust to impairments caused by the optical fiber, similar to a …
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Flexible Polymer Waveguides for High-Speed Short-Reach Links
… polymer waveguides for used in short-reach communication links. Flexible polymer waveguides enable a wider range of applications as compared to the rigid polymer waveguides, especially for the rack-to-rack links and data bus systems in autonomous car and avionic industry. However, their …
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Sensing and Communication Coexistence in Optical Networks
L'abstract è presente nell'allegato / the abstract is in the attachment
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MIMO Communication Capacity: Antenna Coupling and Precoding for Incoherent Detection
… coupling, and MIMO performance of multi-mode optical fiber with non-linear detection. Superdirectivity can lead to abnormally large capacity bounds in a MIMO communication system, especially when the antennas are placed close together. Because superdirective behavior is difficult to achieve in …
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Opto-VLSI-based adaptive optical power splitter/combiner for next generation dynamic optical telecommunication networks
The demand for optical power splitters is growing globally, due to the rapid deployment of fibre-to-the-premises, optical metropolitan area network (MAN), and active optical cables for TV/Video signal transport. Optical splitters play an important role in passive optical network (PON) technology by …