Recirculating binary fiberoptic delay line apparatus for time st

Details Recirculating binary fiberoptic delay line apparatus for time st Recirculating binary fiberoptic delay line apparatus for time st

1991-04-26

1992-03-31

Lee, John D.

Optical waveguides

With optical coupler

Plural

25022712, 359127, 359195, 359115, 359173, 385 27, G02B 628

Patent

active

051014556

ABSTRACT:
A recirculating binary fiberoptic delay line apparatus having a programmable optical delay line to delay multiplexed optical signals which are at different wavelengths. An optical demultiplexer separates the delayed multiplexed signals according to wavelength and provides two portions of each separated signal. One portion is applied to the elements of an array antenna and the other portion is detected by wavelength in a detector bank to obtain the delay modulation signal which modulates laser diodes, each at a different optical wavelength, in a laser diode bank to provide a number of delayed optical signals at different wave-lengths. The delayed optical signals are multiplexed together and applied to the optical delay line for recirculation through the apparatus to generate a greater number of delay signals.

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"Integrated-Optic Delay Line Signal Processor", B. Lagerstroem et al, OFC/IOOC, p. 176, 1987, paper wk-2.

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