Tunable RF filter device using optical waveguides with dispersion slopes of opposite signs and related methods
AssigneeHarris Corporation
InventorsRichard DeSalvo, Charles Middleton
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Abstract
A tunable Radio Frequency (RF) filter device includes a tunable optical source configured to generate an optical carrier signal, and a modulator coupled to the tunable optical source and configured to modulate the optical carrier signal with an RF input signal. The tunable RF filter device may also include first and second optical waveguides coupled to the modulator and having first and second dispersion slopes of opposite sign, and an optical-to-electrical converter coupled to the first and second optical waveguides and configured to generate an RF output signal with a frequency notch therein based upon the tunable optical source.
Claims15
A tunable Radio Frequency (RF) filter device comprising:
- a tunable optical source configured to generate an optical carrier signal;
- a modulator coupled to said tunable optical source and configured to modulate the optical carrier signal with an RF input signal;
- first and second optical waveguides coupled to said modulator and having first and second dispersion slopes of opposite sign;
- and
- an optical-to-electrical converter coupled to said first and second optical waveguides and configured to generate an RF output signal with at least one frequency notch therein based upon said tunable optical source and the first and second dispersion slopes of opposite sign.
A tunable Radio Frequency (RF) filter device comprising:
- a tunable optical source configured to generate an optical carrier signal;
- a controller coupled to said tunable optical source and configured to tune a frequency of the optical carrier signal over a desired frequency range;
- a modulator coupled to said tunable optical source and configured to modulate the optical carrier signal with an RF input signal;
- first and second optical waveguides coupled to said modulator and having first and second dispersion slopes of opposite sign;
- and
- an optical-to-electrical converter configured to generate an RF output signal with at least one frequency notch therein based upon said tunable optical source and the first and second dispersion slopes of opposite sign, said optical-to-electrical converter comprising first and second optical detectors coupled respectively to said first and second optical waveguides, and a combiner coupled to said first and second optical detectors.
Dependencies are inferred from the claim text.