Accession Number : AD0774935
Title : Applications of 'Slow' Modes for Active Elements in Integrated Optics.
Descriptive Note : Annual rept. 1 Jan-31 Dec 73,
Corporate Author : NEBRASKA UNIV LINCOLN DEPT OF ELECTRICAL ENGINEERING
Personal Author(s) : Buckman,Alvin B.
Report Date : 31 DEC 1973
Pagination or Media Count : 42
Abstract : Studies of 'slow' guided modes on partially metallic, multifilm waveguides show that, while losses with such modes are too large (1/e decay distances of 100 wavelengths or less) to use these devices as integrated modulators, their unique feature of high field concentration in a very thin metal film makes them attractive as integrated optical bolometers. Multifilm, all-dielectric waveguides can increase the efficiency of integrated optical modulators by at least 60%. Films evaporated from PbI2 are found to be 'damaged' by Ar ion laser radiation at power densities as low as 50 mw/sq cm, for exposures of about one hour. The damage takes the form of a refractive index change of the order of 1-10%, and appears permanent. (Author)
Descriptors : *Waveguides, *Photoconductors, Bolometers, Lead compounds, Iodides, Optical properties, Laser beams, Thin films, Radiation effects
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE