Patent ID: 6366712
Filing Date: 2002-04-02
Classification: H04B

Abstract:
Apparatus for combining two signals having separate RF frequency bands on a single optical transmission fiber comprising:a first optical fiber for providing light at a selected nominal wavelength, said light on said first optical fiber being modulated by an analog RF signal having a first selected frequency band; a digital RF signal having a second selected frequency band, said second selected frequency band being greater and separate from said first selected frequency band; a high-pass filter for receiving said digital RF signal, said high-pass filter selected to readily pass signals having a frequency within said second selected frequency band and to substantially reduce signals having a frequency within said first selected frequency band; an optical light generator connected to receive said filtered digital RF signal, said generator for providing light on a second optical fiber at said selected nominal wavelength modulated by said filtered digital RF signal; and an optical coupler connected to receive modulated light from each of said first and second optical fibers and to provide a combined output on a third optical fiber, having a first selected percentage of said combined light output being provided by said first optical fiber and a second selected percentage of said combined output light being provided by said second optical fiber.