Accession Number : ADA288895

Title :   Design of a Digital Interferometric Demodulator.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Brenner, David W.

PDF Url : ADA288895

Report Date : SEP 1994

Pagination or Media Count : 106

Abstract : This thesis investigates the design of a digital fiber-optic interferometric demodulator based upon a passive symmetric combination of signals produced by an interferometer terminated with a 3x3 optical coupler. The demodulator was implemented using a digital signal processing (DSP) board based upon a TMS320C31 DSP processor. The demodulator was tested using signals produced by a set of interferometric simulators which used an analog AD639 trigonometric chip. A goal of this thesis was to demonstrate an improved noise floor at low frequencies as compared with a similar analog implementation.

Descriptors :   *FIBER OPTICS, *OPTICAL INTERFEROMETERS, *HYDROPHONES, *ACOUSTOOPTICS, SIGNAL PROCESSING, THESES, SEMICONDUCTOR LASERS, OPTICAL DETECTORS, COMPILERS, DEMODULATORS.

Subject Categories : Acoustooptic and Optoacoustic Devices
      Acoustic Detection and Detectors
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE