Distortion-compensated fiber-optic multi-tap proportional true t

Details Distortion-compensated fiber-optic multi-tap proportional true t Distortion-compensated fiber-optic multi-tap proportional true t

1995-09-14

1997-01-07

Gregory, Bernarr E.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

H01Q 322

Patent

active

H00016250

ABSTRACT:
In the distortion-compensated fiber-optic multi-tap proportional true time-delay for an array antenna a modulated optical signal having at least one wavelength and predetermined optical spectrum and containing at least one modulated signal is propagated along a high-dispersion optical fiber having a plurality of branch optical fibers of zero-dispersion. The varying lengths of the branch optical fibers provide varying time delays for the respective modulated optical signals applied as an electrical signal to an associated antenna element forming the array antenna. To eliminate an inherent distortion of the modulated optical signal in the high-dispersion optical fiber a phase conjugator at one or more equidistant points along the high-dispersion optical fiber inverts the optical spectrum of the modulated optical signal about a predetermined inversion frequency.

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