Accession Number : ADA194862

Title :   A Fiber Optic Beamforming Processor for Wideband Direction Finding.

Descriptive Note : Professional paper for Mar 88,

Corporate Author : NAVAL OCEAN SYSTEMS CENTER SAN DIEGO CA

Personal Author(s) : Pappert, Stephen A

PDF Url : ADA194862

Report Date : Apr 1988

Pagination or Media Count : 3

Abstract : This paper describes a wideband electro-optic direction finding (DF) processor employing an array of laser diodes, an array of photo-detectors, and a network of fiber optic delay lines. This DF filter offers a potential operational bandwidth in excess of 10 GHz and allows for multiple, simultaneous beam angular responses with peaks which are independent of frequency. Two eight-laser, two-beam laboratory test model DF devices, one utilizing multimode optical fiber and the other single-mode fiber, were constructed. These experimental optical beamforming filters are operable in the 100-2000 MHz frequency range and can simultaneously monitor two angles of arrival. Experiments were performed to determine the two systems' sensitivity, dynamic range, angular resolution, and frequency response.

Descriptors :   *ANGLE OF ARRIVAL, *DIRECTION FINDING, *FIBER OPTICS, *FIBER OPTICS TRANSMISSION LINES, ANGLES, ARRAYS, BANDWIDTH, BEAM FORMING, BROADBAND, DELAY LINES, DIODES, DYNAMIC RANGE, ELECTROOPTICS, FREQUENCY, FREQUENCY RESPONSE, LASERS, MULTIMODE, OPTICAL FILTERS, PROCESSING EQUIPMENT, RESOLUTION, SENSITIVITY

Subject Categories : Target Direction, Range and Position Finding
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE