Accession Number : ADD015296

Title :   Optical Interferometric Sensor Detected Intensity Noise Reductions Means.

Descriptive Note : Patent, Filed 5 Feb 90, patented 14 Apr 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Gremillion, Jeffrey C

Report Date : 05 Apr 1992

Pagination or Media Count : 5

Abstract : An apparatus for reducing the detected optical intensity noise received from an optical interferometric sensor. One embodiment of the device comprises high pass and low pass filtering means and an arithmetic divider device, arranged so as to receive a single signal S1 and to cancel unwanted intensity noise in signal S1 prior to the transmittal of the noise free signal Sout to a receiver circuit. A second embodiment of the device further includes an adder and a subtractor to receive two signals S1 and S2. The adder and subtractor are cross connected in such a way as to combine the two signals for further processing and also to still permit intensity noise cancellation in the event one of the signals is not available.

Descriptors :   *FILTRATION, *NOISE, *RECEIVERS, *INTERFEROMETERS, *ACOUSTICS, ARITHMETIC, CANCELLATION, CIRCUITS, INTENSITY, PROCESSING, SIGNALS, JAPAN, PATENTS

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE