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 28 for “"optical switch"”.
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An optical switch.
Thesis. 1975. B.S.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
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Circuit simulation models and optical switch structure for interconnection networks
… two important issues in the development of optical interconnection. One major goal is to develop a set of circuit simulation models in order to enable the simulation of various optoelectronic integrated circuits. Another goal is to develop integrated optical switch circuits with the new …
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Controlling the sense of molecular chirality with light: Toward a liquid crystal optical switch
… control of chirality with light, a light-induced switching of the stereochemistry of a chiral molecule. This can be done in one of the two ways: photoresolution of a racemate by circularly polarized light based on circular dichroism of chiral compounds and chirochromism, a new class of …
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(1) Artificial Synovial Fluid and Cartilage. (2) Non-Manumitative GD3+ Hosts as MRI Contrast Agents. (3) Five-Member Heterocycles as Switchable Ferromagnetic Coupling Units. (4) Liquid Crystal Opto-Optical Switch: Non-Destructive Information Retrieval Based on a Photochromic Fulgide as Trigger
… yields a family of acid-base driven magnetic switches in which the ground state multiplicity can be changed with protonation, a previously unknown phenomenon. Analysis of the wavefunction revealed that these seemingly disparate groups belong to one superfamily and their properties can be …
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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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A photon-photon interface with an atomic ensemble in an optical cavity
… Here, I demonstrate four such devices for optical photons traveling in two different modes: an all-optical switch and transistor, a nondestructive photon detector, a phase shifter, and a quantum state generator. These devices rely on a nonlinear optical interface comprised of a few thousand …
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Engineering of integrated devices on electro-optical chip: grating couplers, algorithms, and switches
… wires. The conversion of electrical signals to optical signals has been proposed in the future electro-optical computers as a way of addressing this issue. Much work has gone into the design, fabrication, and testing of components of new optical elements that can be implemented in chips …
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Finite difference time domain simulation of subpicosecond semiconductor optical devices
… method to simulate a subpicosecond semiconductor optical switch is developed in this research. The problem under studying involves both electromagnetic wave propagation and semiconductor dynamic transport, which is a nonlinear phenomenon. Finite difference time domain (FDTD) technique is used to …
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optical engineer
In this research an approach to all optical delta sigma modulator (ADSM) has been elaborated. Two important components of ADSM; "leaky integrator" and "inverted bi-stable quantizer" were modeled, on the basis of cross gain modulation of the Semiconductor Optical Amplifier (SOA). The simulations …
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Assessment of colloidal self-assembly for photonic crystal
… are useful for implementing reflectors, optical switch and sensors. Besides, the anomalous dispersion characteristic near to the band edges or near to flat bands of the photonic band diagram is suited for superprism and light harvesting applications. Potentially, the unique …
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Laterally Movable Gate Field Effect Transistor (LMGFET) for microsensor and microactuator applications
… or an electro-mechanical filter and a mechanical/optical switch are described.
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In-fiber semiconductor filament arrays
… thickness breaks up into filament arrays during optical-fiber thermal drawing. This structural evolution occurs exclusively in the cross-sectional plane, while the uniformity along the axial direction remains intact. We demonstrate crystalline semiconductor nanowires by post-drawing annealing …
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Integrated infrared sensor platform
… Besides, a ChG based small-footprint plasmonic optical switch is designed to work as an optical router for integrated spectrometer applications with a small (167 nm long) footprint. In the last part, a MIR PbTe based integrated detector has been successfully demonstrated for the first time. A …
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All-optical nonlinear signal processing devices and their applications within fibre-optic communication systems
… research into the development of a range of all-optical fibre based nonlinear devices for optical communication applications. The research can he divided into two main themes. The first concerns the use nf superstructured fibre Bragg grating technology together with fibre based nonlinear devices …
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The synthesis and testing of fast switching, novel conjugated polymers for electrochromic applications
… small molecules were extensively used for optical displays devices such as cathode ray tubes, liquid crystal displays, light emitting diiodes [sic] and plasma screens. However, in the past decade, significant progress in polymer electrochromism has shown many organic electroactive polymers …
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On greening optical access networks
… concern, reducing energy consumption of optical access networks has become an important issue for network designers. In Ethernet passive optical network (EPON), the optical line terminal (OLT) located at the central office broadcasts the downstream traffic to all optical network units …
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Scalable and Reconfigurable Optical Switches: From Network Design to System Application
… traffic causes increasing demands on network switching technologies, both in the communication networks and datacentre networks. The optical switch has been the primary research topic in recent years since it shows great potential for meeting the requirements of large scalability, flexibility, …
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Energy Efficient High Port Count Optical Switches
… shared memory space. Large-scale high-speed optical switches tend to use a rearrangeably non-blocking architecture as this limits the number of switching elements required. However, this comes at the expense of requiring more sophisticated route selection within the switch and also some forms …
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Towards Monolithically Integrated Optical Systems for Communication and Sensing
… Conventional electronic approaches to switching and sensing face fundamental bottlenecks in scalability, energy efficiency, and latency. In this context, integrated photonics emerges as a compelling solution, offering massive bandwidth, low latency, and immunity to electromagnetic …
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Processing of ultra-short optical pulses for high bit-rate optical communications
… linear pulse shapers into various all-optical signal processing devices for applications in high speed optical communication systems, to enhance the overall system performance, is investigated. The linear pulse shaping is performed using superstructured fibre Bragg gratings, which seem …
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