Integrated Optical Microwave Spectrum Analyser (IOSA) Using Geodesic Lenses

G. F. Doughty; R. M. DeLaRue; N. Finlayson; J. Singh; J. F. Smith

doi:10.1117/12.934447

16 June 1983 Integrated Optical Microwave Spectrum Analyser (IOSA) Using Geodesic Lenses

G. F. Doughty, R. M. DeLaRue, N. Finlayson, J. Singh, J. F. Smith

Proceedings Volume 0369, Max Born Centenary Conf; (1983) https://doi.org/10.1117/12.934447
Event: The Max Born Centenary Conference, 1982, Edinburgh, United Kingdom

Abstract

We report on an IOSA based on a titanium diffused optical waveguide layer in lithium niobate with geodesic lenses. Lenses were designed by the method of Sottini et al but with essential modifications to smooth over regions of extreme curvature. Ray-tracing analysis showed that the deviation from the ideal profile introduced by this smoothing had negligible effect. Several lens fabrication methods were experimentally evaluated -ultrasonic impact grinding, computer-controlled diamond tool grinding and diamond turning, followed by polishing with large area flexible tools, or with small pads under microprocessor time and position control. The most reliable method was diamond turning followed by polishing with a small pad on a specially constructed computer controlled polishing machine. Data is also presented on factors affecting overall spectrum analyser dynamic range such as in-plane scattering and acousto-optic third-order intermodulation.

Citation Download Citation

G. F. Doughty, R. M. DeLaRue, N. Finlayson, J. Singh, and J. F. Smith "Integrated Optical Microwave Spectrum Analyser (IOSA) Using Geodesic Lenses", Proc. SPIE 0369, Max Born Centenary Conf, (16 June 1983); https://doi.org/10.1117/12.934447

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