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 7 of 7 for “"tapered waveguide"”.
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Tapered waveguide lasers
… thesis concerns the design and fabrication of tapered waveguide lasers to allow efficient, high-power diode-pumping and produce diffraction-limited, near-symmetrical output, whilst maintaining a monolithic design compatible with integrated optical circuits. <br/><br/>The design rules required …
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Integrated chirped Bragg gratings for dispersion control
… regimes. The device, based on a deeply etched tapered waveguide design, may be fabricated fully post-growth, lending it a significant advantage over current grating designs that require the pattern to be written into the core material and the upper cladding layers subsequently overgrown. The …
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Design optimization of broadband rape-based reflectary antena elements for x-band applications
… on a paper substrate was realized by using a waveguide simulator technique. An X-band tapered waveguide simulator was used for the scattering parameter measurements. Results for rectangular patch element fabricated over paper substrate show a reflection loss and phase range of -8.12 dB and …
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Path-integral analysis of passive, graded-index waveguides applicable to integrated optics
… in this work are simple models for graded-index waveguide structures, such as tapered and coupled waveguides of a wide variety of geometries. Tapered and coupled graded-index waveguides are the building blocks of waveguide junctions and tapered couplers, and have been mainly studied in the past …
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Ray analysis of tapered graded-index planar waveguides and fibers
Propagation properties of linearly tapered parabolic-index optical waveguides are investigated. Tapers with planar (two-dimensional) and fiber (three-dimensional) geometries are considered. A ray optics approach is used in the analysis, assuming that the characteristic dimensions of tapered …
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High-average-power planar waveguide lasers
… towards high-average-power diode-pumped planar waveguide lasers. As a format of the laser active medium, planar waveguides take advantage of their extreme slab geometry, which is compatible with that of high-power diode lasers, offer a great degree of versatility of the pump arrangement, have …
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RESTAURANT FOOD WASTE MANAGEMENT USING MICROWAVE PLASMA GASIFICATION TECHNOLOGY
… software, COMSOL. The cavity consists of a tapered waveguide section that is shorted at one end to produce a stationary wave with a large electric field at the gas nozzle. The field is strong enough to produce a self-striking argon plasma when the power is applied. Nitrogen was used to keep …