Photonic RF distribution system

Details Photonic RF distribution system Photonic RF distribution system

2005-02-10

2008-05-27

Phan, Hanh (Department: 2613)

Optical communications

Hybrid communication system

C398S082000, C398S182000, C398S183000, C398S079000, C398S090000, C398S091000, C398S093000, C398S095000, C398S154000, C398S155000, C398S162000, C398S163000, C398S192000, C398S193000, C398S194000, C398S195000, C398S196000, C398S197000, C398S118000, C385S003000, C385S004000, C385S005000, C385S002000, C385S008000, C385S009000, C385S015000, C385S027000, C385S031000, C385S014000, C372S028000, C372S029010, C372S032000, C372S018000, C372S020000, C356S451000, C356S484000

Reexamination Certificate

active

07379672

ABSTRACT:
The present photonic RF generation and distribution system provides a system and method for distributing an RF output signal. The photonic RF distribution system includes two optical sources for generating optical signals. A first optical source (42) is operable to generate a first optical signal having an operating frequency. A second optical source (44) is operable to generate a second optical signal having an operating frequency. A modulator (46) is operable to impress an RF modulation signal on a tapped portion of the first optical signal such that a modulated signal is generated. A first coupler (52) combines the modulated signal with a tapped portion of the second optical signal, thereby forming a combined signal having a difference frequency component. A control photodetector (50) is responsive to the combined signal to generate a tone signal. An offset locking circuit (56), responsive to the tone signal, controls the operating frequency of the optical sources (42and44) such that the first optical signal and the second optical signal are frequency locked.

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B. Jensen and L.G. Kozovsky; Relative Frequency Stabilization of a Set of Lasers Using Optical Phase-Locked Loops; pp. 535-538; TFL Telecommunications Research Laboratory; Horsholm, Denmark.
Jensen, B. et al., “Relative Frequency Stabilization of a set of Lasers Using Optical Phase-Locked Loops,” Proceedings of the European Conference on Optical Communication, Sep. 1990, pp. 535-538, vol. 1, Amsterdam, Denmark.

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