Accession Number : ADA310060

Title :   Silica-Based Optical Time-Shift Network.

Descriptive Note : Final technical rept. Aug 93-Aug 95,

Corporate Author : HUGHES RESEARCH LABS MALIBU CA

Personal Author(s) : Ng, W. ; Loo, R. ; Livingston, S. ; Lee, J. J.

PDF Url : ADA310060

Report Date : MAR 1996

Pagination or Media Count : 38

Abstract : The objective of this program was to design, fabricate, package, and demonstrate a silica waveguide time delay network for evaluation in a phased array antenna testbed. Specifically, a 4-bit silica waveguide time shifter module, with programmable time delay steps of 0.248 nsec has been successfully developed. The silica waveguide module was inserted into a 96 element L band array, controlling the central column. Extensive demonstration and evaluation verified that the antenna has better than 50% instantaneous bandwidth scanning angles +/- 60 degrees. In addition, an improved, smaller package was developed and evaluated, resulting in a 'folded-chip' package with dimensions of approximately 13 cm x 7 cm.

Descriptors :   *PHOTONICS, *OPTICAL WAVEGUIDES, TIME INTERVALS, TEST BEDS, SILICON DIOXIDE, COMPUTER PROGRAMMING, MODULAR CONSTRUCTION, DELAY, ANTENNA ARRAYS, PHASED ARRAYS.

Subject Categories : Acoustooptic and Optoacoustic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE