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High-speed fiber-optic tapped delay line correlator/code generator

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Abstract

Tapped delay lines are basic components for performing a wide variety of signal processing op- orations, such as convolution, correlation, Fourier transformation, and the various processing and filtering functions which derive from them. These operations can be performed using a variety of approaches, such as surface acoustic wave tapped delay lines1 or charge-coupled devices.2 The problem is the extension of these conventional technologies to the processing of signals having bandwidths well in excess of 1 GHz. The macrobend optical fiber tapped delay line is a new device which uses single-mode optical fiber as the delay medium.3 It is ideally suited for high-speed signal processing because of the inherently large time- bandwidth product and low loss of single-mode fiber. In this presentation we describe two new applications of this device, namely, the use of the macrobend optical fiber tapped delay line as a code generator and as a correlator.

© 1983 Optical Society of America

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