Accession Number : ADD009853
Title : Wideband Electrical/Optical Multiplexer.
Descriptive Note : Patent Application,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC
Personal Author(s) : Howard,Dean D ; Cross,David C ; Ornstein,Edward
Report Date : 03 Aug 1982
Pagination or Media Count : 16
Abstract : The design of a wideband multiplexer is based on the conversion of a plurality of electrical input data signals to be multiplexed to optical signals, differentially delaying this plurality of optical signals, and then summing these signals optically and converting the sum signal back to an electrical signal. This scheme is advantageous because optical delay circuits add very little dispersion to the signals on which they are operating. This low dispersion characteristic is due to the fact that the bandwidth of the signal being operated on becomes infinitesimal relative to the optical carrier frequency. Thus, the percentage bandwidth is extremely small. In particular, it is noted that optical delay lines implemented by means of optical fiber coils have a very wide bandwidth and low loss. Accordingly, electrical input signals are used to modulate light propagating through optical fiber delay lines. The resultant differentially delayed optical signals are then summed and provided to an optical receiver.
Descriptors : *Patent applications, *Multiplexing, *Monopulse radar, *Fiber optics transmission lines, *Radar equipment, *Optical equipment, Delay lines, Radar tracking, Carrier frequencies, Delay circuits, Input, Electrical properties, Bandwidth, Optical circuits, Conversion, Receivers, Low loss, Broadband, Signal processing, Optical properties, Coils, Electricity
Subject Categories : Electrical and Electronic Equipment
Active & Passive Radar Detection & Equipment
Fiber Optics and Integrated Optics
Distribution Statement : APPROVED FOR PUBLIC RELEASE