Accession Number : ADD016098
Title : Fiber Optic Continuous True Time-Delay Modulator.
Descriptive Note : Patent Application, Filed 6 Aug 93,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC
Personal Author(s) : Esman, Ronald D
Report Date : 06 Aug 1993
Pagination or Media Count : 21
Abstract : The fiber optic true time-delay modulator generates a continuously variable true time-delay (i.e., phase shift) by utilizing the dispersion characteristic of single mode optical fibers. The signal to be variably delayed modulates a continuous wave optical signal from a tunable laser source which is applied to a dispersive optical fiber wherein the phase shift occurs. The optical intensity output of the dispersive optical fiber is converted back into electrical energy by a photodetector for use in radio frequency, microwave and millimeter wave electronic devices. The invention can be used to generate multiple synchronized output signals by using a multiple wavelength laser or by combining outputs from several independently tuned lasers. Also, frequency and phase shifting is inherently provided by modulating the time delay.
Descriptors : *PATENT APPLICATIONS, *FIBER OPTICS, *OPTICAL CIRCUITS, *OPTICAL SWITCHING, CONTINUOUS WAVES, ELECTRIC POWER, RADIOFREQUENCY, INTENSITY, LASERS, MICROWAVES, MILLIMETER WAVES, MODULATORS, ELECTROOPTICS, FREQUENCY MODULATORS, PHASE SHIFT, PHOTODETECTORS, SIGNAL PROCESSING, TIME DELAY RELAYS, SIGNALS, TUNABLE LASERS, VARIABLES
Subject Categories : Electrooptical and Optoelectronic Devices
Fiber Optics and Integrated Optics
Distribution Statement : APPROVED FOR PUBLIC RELEASE