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Proceedings Paper

Programmable delay line for radar testing
Author(s): Harry T.M. Wang
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Paper Abstract

We have fabricated a programmable fiber optic delay line operating in the 1550 nm band capable of providing a total delay of 1 ms in increments of 83.6 ns for RF signals up to 2.5 GHz. Electromechanical switches with 6 ms switching time are employed for programming the delay line. To overcome the switching speed limitation, we used a dual parallel delay line. Signal selection is via a high speed RF switch. For radar test application, the approach enables continuous tracking (to within a range cell of 42 ft) of a moving target with negligible loss of data. Three erbium-doped fiber optical amplifiers excited by a single 1480 nm pump laser are used to compensate for losses in each of the delay lines.

Paper Details

Date Published: 2 December 1992
PDF: 6 pages
Proc. SPIE 1703, Optical Technology for Microwave Applications VI and Optoelectronic Signal Processing for Phased-Array Antennas III, (2 December 1992); doi: 10.1117/12.138422
Show Author Affiliations
Harry T.M. Wang, Hughes Research Labs. (United States)


Published in SPIE Proceedings Vol. 1703:
Optical Technology for Microwave Applications VI and Optoelectronic Signal Processing for Phased-Array Antennas III
Shi-Kay Yao; Brian M. Hendrickson, Editor(s)

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