Accession Number : AD0479052

Title :   ELECTRO-OPTICAL SIGNAL PROCESSING TECHNIQUES FOR PHASED ARRAY ANTENNAS.

Descriptive Note : Quarterly progress rept. 1 Oct-31 Dec 65,

Corporate Author : COLUMBIA UNIV NEW YORK ELECTRONICS RESEARCH LABS

Personal Author(s) : Arm, M. ; Aimette, A. ; Bernstein, S.

Report Date : 01 JAN 1966

Pagination or Media Count : 63

Abstract : The investigation of phased array antenna electrooptical signal processors is continued. The experimental results for side-lobe suppression in the time-delay multiplex mode are presented. A side-lobe suppression of 30 db for both signals on and off the boresight axis is demonstrated. A comparison of the optical system response with the input signal spectrum indicates that the results are very nearly ideal and limited primarily by the residual phase errors in the optical lenses. Preliminary test results for the new aspheric lenses are included. The experimental program for the investigation and development of a solid ultrasonic light modulator is described. The experimental configurations for a fused silica light modulator operating at 100 mHz for various transducers is presented. A brief derivation of the elasto-optic theory for solids and a discussion of modulation index, internal refraction effects, and attenuation in fused silica are included. (Author)

Descriptors :   *DATA PROCESSING), (*PHASED ARRAYS, MATHEMATICAL ANALYSIS, ELECTROOPTICS, ANTENNA LOBES, REDUCTION, MULTIPLEXING, OPTICAL EQUIPMENT, LENSES, LIGHT, MODULATORS, ULTRASONIC RADIATION, MECHANICAL WAVES, ASPHERICAL LENSES, REFRACTIVE INDEX, SILICON COMPOUNDS, DIOXIDES, SOLIDS, REFRACTION, ULTRAVIOLET SPECTRA, VISIBLE SPECTRA, LIGHT TRANSMISSION, THEORY.

Subject Categories : Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE