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 163 for “"Optical systems"”.
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Nonequilibrium transitions in quantum optical systems
… statistical properties of nonlinear quantum optical systems driven by an external radiation source. In certain limiting cases, a comparison is made between these transitions and the phase transitions found in equilibrium physical systems. In chapters one and two, the mathematical tools are …
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GHOST IMAGE ANALYSIS FOR OPTICAL SYSTEMS
… caused by the inter-reflections of light from optical surfaces that have transmittances less than unity. Ghosts can reduce contrast, provide misleading information, and if severe can veil parts of the nominal image. This dissertation develops several methodologies to simulate ghost effects …
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Geometry and Light in Quantum Optical Systems
This thesis looks at a range of quantum optical system with an emphasis on the geometrical structure. We first consider two coupled systems, a pair of 2-level systems and pair harmonic oscillators, with specific couplings to the environment through a Lindblad master equation. We look at observables …
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All optical systems for terabit network era
… capacity demand drives the development of the optical fiber networks. Since optical super-channels carrying multi- Terabit/s transmissions are the next evolution of the optical links, future transmitters and receivers systems will be required to handle vast volume of information while …
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Exploring Novel Biophysical Mechanisms In Evolved Optical Systems
… two novel biophysical mechanisms derived from optical systems in marine animals. I will begin by describing the physical mechanism used by giant clams to increase diffusive flux of photosynthetic product from symbiotic algae. Over 50 years ago, it was reported that the addition of clam …
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Broadband Coherent Perfect Absorption in One-Dimensional Optical Systems
… plays a critical role in a variety of optical applications – sometimes it is desirable to minimize it as in optical fibers and waveguides, or to enhance it as in solar cells and photodetectors. We describe here a new optical scheme that controllably produces high optical absorption over …
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Towards Monolithically Integrated Optical Systems for Communication and Sensing
… multifunctional, and reconfigurable photonic systems requires overcoming several challenges at both the device and system levels. This thesis addresses these challenges by advancing monolithically integrated photonic platforms that unify communication and sensing functions within a coherent …
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Performance of phase noisy optical systems with frequency stabilisation
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1991.
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Optimal placement of binary actuators in deformable optical systems
… to active figure correction in large optical systems such as space telescopes and ground-based solar-thermal concentrators. This Thesis will continue this exploration. The information-theoretic requirements of the corrective commands required in active optics will be explored to …
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Direct detection optical systems : intersymbol interference and electrical filter designs
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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An Engineering Systems Approach to Production Planning of Optical Systems
… opportunities to improve their production systems through the adoption of new technologies. When presented with these opportunities, enterprise leaders are faced with decisions that can have profound viability implications. A value-centric framework to holistically and systematically inform …
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Micro-opto-mechanical switching and tuning for integrated optical systems
Integrated optical circuits have the potential to lower manufacturing and operating costs and enhance the functionality of optical systems in a manner similar to what has been achieved by integrating electronic circuits. One of the basic optical elements required to enable integrated optical …
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Space Image Processing and Orbit Estimation Using Small Aperture Optical Systems
… has never been greater. Small aperture (< 0:5m) optical systems, increasingly popular in both amateur and professional circles, provide an inexpensive source of such data. However, utilizing these types of systems requires understanding their limits. This research uses a combination of image …
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Design And Assessment Of Compact Optical Systems Towards Special Effects Imaging
… special effects may, however, be created optically. Such approach will provide not only real-time image processing at the speed of light but also a preview option allowing the user or the artist to preview the effect on various parts of the object in order to optimize the outcome. The work …
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Control and detection of complex fields in spatio-temporal optical systems
Methods for controlling and detecting complex optical fields with high spatial and temporal bandwidths are considered in this thesis. Space-time transformations can be used to encode and detect information in optical fields. Interferometric cross correlators detect temporal information by using …
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Controllability of Open Quantum Optical Systems: Photon Fock States in a Cavity
… has always been a significant interest in using optical systems to control quantum phenomena. A major barrier to controllability of quantum optical systems is the fact that the systems are usually innite dimensional open systems, two cases which have mostly negative controllability results. This …
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Optical Systems for Advanced Sensing Application. From environment to cultural heritage monitoring.
L'abstract è presente nell'allegato / the abstract is in the attachment
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Design of a cam and follower linear actuator for satellite optical systems
Optical systems for satellites are used to image and track the physical environment of earth from space. Where the optical system images can be controlled through the rotation and movement of the optical system. Optical alignment is achieved though linear actuators, which constrain different …
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Free-form optical systems for nonimaging applications = Sistemas ópticos anamórficos con aplicaciones anidólicas
… photovoltaics, illumination, and wireless optical communication. This is due to the possibility to design an optical system that is composed of fewer surfaces and more tolerant to manufacturing errors. In the major part this thesis treats the application of simultaneous multiple surface …
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