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 20 of 69 for “"Erbium-doped"”.
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Stable multiwavelength erbium-doped random fiber laser
Multiwavelength fiber lasers which consist of equally-spaced frequency components have found many applications and that includes as light sources for optical communication systems. One of the techniques available to generate such multiple wavelengths is random fiber lasers. Despite simplicity in …
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Energy exchange processes in erbium-doped fluoride glasses
… relaxation processes between ions in rare earth doped glasses and crystals. In particular interest has focused on diode-pumped lasers and optical waveguide amplifiers based on rare earth ions. This thesis is concerned with developing a model, which can explain the population and depopulation …
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Additive pulse mode-locked erbium-doped fiber lasers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Erbium doped silicon as an optoelectronic semiconductor material
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1994.
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Generation of pulsed dual wavelength erbium doped fiber laser
… and strong homogeneous line broadening faced by erbium doped fiber (EDF). Therefore, the aim of this thesis is to generate a single and dual wavelength fiber laser and pulsed fiber laser by using fiber Bragg grating (FBG) in single ring and Figure-8 configurations at 1550 nm and 1560 nm. Analysis …
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Defect characterization of erbium doped silicon light emitting diodes
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1994.
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Mode-locking of thulium-doped and Erbium-doped fiber lasers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Process integration of erbium-doped silicon light-emitting diodes and MOSFETs
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1996.
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Memristor Based Gain-Varying PI Control for Erbium-Doped Fiber Amplifiers (EDFAs)
In this research, the focus is on Erbium-Doped Fiber Amplifiers (EDFAs), crucial components in optical communication systems. Traditional control systems face challenges in control complexity and cost-effectiveness. This research addresses this challenge by introducing a novel …
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Remote temperature sensing with low-threshold-power using erbium-doped fiber laser
… a remote temperature sensor that utilizes erbium-doped fiber laser (EDFL). The configuration of the laser cavity is linear, comprising a fiber mirror reflector at one end, and the other end is formed by a fiber Bragg grating (FBG) with central wavelength of 1560 nm as the sensor head. A 30 …
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Noise performance of erbium-doped fiber amplifiers with forward and reverse plumbing
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
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Materials characterization and transmission analysis in erbium-doped gallium nitride microresonator structures
GaN:Er is an attractive material for room temperature 1.54 pm luminescence enhancement devices for use in telecommunications because it does not experience thermal quenching at room temperature like Si:Er and can be electronically pumped. GaN:Er layers grown by molecular beam epitaxy (MBE) on …
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Silicon-germanium saturable absorbers and erbium-doped waveguides for integrated mode-locked lasers
… (SiGe) Saturable Bragg Reflectors (SBR) and Erbium-doped waveguide chips are fabricated and characterized as crucial components for integration of a mode-locked laser on a Si-chip. The SiGe-SBR is designed to be compatible with Si-based fabrication processes for monolithic integration and to …
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Quenching and lasing effects in erbium-doped fibers made with alkaline earth fluoride nanoparticles
Erbium as a dopant in optical fiber is highly valued for its use in lasing and amplification. However, the scalability of erbium-doped fibers (EDFs) has been limited by the natural likelihood of the rare earth ion to cluster in silicate glasses. When the ions cluster, they continuously trade energy …
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Optical distribution networks : signal-to-noise ratio optimization and distributed erbium-doped fiber amplifiers
… issues related to the use of remotely-pumped erbium-doped fiber amplifiers in optical distribution networks are analyzed. We investigate the optimal allocation of gain and loss among the stages of a lumped amplifier chain, using the concepts of a Nash solution and Pareto optimality. The …
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High repetition rate mode-locked erbium-doped fiber lasers with complete electric field control
… allow full use of current modulator bandwidths. Erbium-doped fiber lasers are one of the leading options to fill this role. To that end, fundamentally mode-locked stretched pulse fiber lasers approaching 250 MHz repetition rate and soliton fiber lasers at over 200 MHz repetition rates are …
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Generation of tunable q-switched erbium-doped fiber laser based on graphite flakes saturable absorber
… aim of this study is to construct a single ring erbium-doped fiber (EDF) laser based on graphite flakes SA to produce short pulse laser. Graphite flakes SA were prepared by mechanical exfoliation techniques and was transferred onto a fiber ferrule tip. The saturable absorption property of the …
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An analysis of cross grain saturation effects in systems of cascaded erbium-doped fiber amplifiers
… the problem of Cross Gain Saturation effects in Erbium Amplifier Cascades. Chapter 1 provides an interesting historical perspective on lightwave communications. This chapter serves as a primer of sorts for understanding the impact of input intensity on amplifier gain, the composition of the …
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Growth of erbium-doped Si/SiGe double heterostructures by ultra-high vacuum chemical vapor deposition
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1997.
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Effect Of Germanium Doping On Erbium Sensitization In The Erbium Doped Silicon Rich Silica Material System
… investigates the sensitization of group IV doped silica films emitting at 1.535μm for applications as silicon compatible light sources. Thin erbium-doped silica films containing excess silicon and germanium were deposited using a multi-gun sputter system. The composition of the deposited …
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