The problem of nonlinear development of Goertler vortices on a curved wall is studied within the framework of incompressible Navier-Stokes equations which are solved by a Fourier-Chebyshev spectral method. The results show that higher harmonics grow due to nonlinear effects; however, most of the energy remains in the fundamental mode. The computed flow field in the presence of a Goertler vortex is in qualitative agreement with the experimental data. The ...
The first generation silicon light intensity modulator had a modulation depth of up to 30% in a bandwidth up to 200 MHz in accordance with the intents of the project, th modulator occupied a small surface area and is fabricated using standard silicon technology, making the modulator suitable for integration with silicon integrated circuits. The second generation of the modulator had several refinements, among which the push-pull design proved to ...
we present acousto-optic modulators for optical fiber, fabricated by the deposition of thin zinc oxide transducers onto specially-lapped glass capillary tubes. by exposing the inner surface of the capillary and contacting it to an optical fiber of the same diameter, a good hertzian contact can be easily attained, providing efficient throughput of acoustic energy at frequencies in excess of 1 ghz. we also describe the design of an optical tap ...
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