Linear swept frequency generator

Details Linear swept frequency generator Linear swept frequency generator

1995-12-20

1998-05-12

Lee, John D.

Coherent light generators

Free electron laser

331 4, 372 24, 372 38, 385 12, H03L 724

Patent

active

057517479

ABSTRACT:
A linear swept frequency generator includes a signal generator that generates an output signal having a frequency that varies between a first frequency and a second frequency. A delay element, such as an optical fiber having a reflector at one end, is configured to receive the output signal and to produce a delayed version of the output signal. This delayed version of the output signal is provided, along with the output signal, to a mixer that combines the signals to produce a reference signal. Finally, a feedback path between the mixer and the signal generator provides the reference signal to the signal generator so that the signal generator controls the frequency of the output signal in response to the reference signal.

REFERENCES:
patent: 4647873 (1987-03-01), Beckner et al.
patent: 4649529 (1987-03-01), Avicola
patent: 4775214 (1988-10-01), Johnson
Electronics Letters, vol. 30, No. 18, 1 Sep. 1994:pp. 1525-1526, "High frequency optical subcarrier generator," X.S. Yao and L. Maleki.
TDA Progress Report 42-121, 15 May 1995:pp. 202-210, "A High-Speed Photonic Clock and Carrier Regenerator," X.S. Yao and G. Lutes.

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