Radio Frequency Cable to Optical Fiber Cable Converter/Interface
Patent, Filed 29 Jun 92, patented 6 Apr 99
DEPARTMENT OF THE NAVY WASHINGTON DC
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A bidirectional converterinterface for connecting several two way broadband RF cables to a single pair of optical fibers is provided. In the reception mode, a broadband RF carrier of an optical conductor signal is directed to a plurality of bandpass filterblock converter combinations. These filterconverter combinations segment the broadband RF carrier into predetermined RF bands carrying the information. Each segmented band is then shifted either up or down to the receiving band frequency utilized by each of the RF systems. In the transmission mode, each transmitted signal from one of the RF systems is passed to a return path block converterbandpass filter combination that shifts the entire transmitted band to a predetermined band. The pre-determined bands are chosen such that each is a unique non-overlapping band associated with a particular one of the RF systems. These unique bands are then combined into a single RF broadband signal that is converted to an optical signal and carried by a second optical conductor. The duplex operation of the RF systems is supported by the use of high split diplex filters. The diplex filters pass the forward fed receiving RF frequency and bandwidth signal to the RF systems, and pass the return fed transmitting RF frequency and bandwidth signal from the RF systems through to the return path.
- Fiber Optics and Integrated Optics
- Radio Communications