Agile RF-lightwave waveform synthesis and an optical multi-tone amplitude modulator
First Claim
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1. A waveform synthesizer comprising:
- (a) a RF-lightwave frequency-comb generator; and
(b) a multi-tone, frequency selective amplitude modulator coupled to the RF-lightwave frequency-comb generator for generating a continuous-wave comb comprising a set of RF tones amplitude modulated onto a lightwave carrier.
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Abstract
A waveform synthesizer comprising for synthesizing RF lightwave waveforms in the optical domain. These waveforms are constructed by generating their constituent Fourier frequency components or tones and then adjusting the amplitudes of those frequency components or tones. The apparatus includes: a RF-lightwave frequency-comb generator; and a multi-tone, frequency selective amplitude modulator coupled to the RF-lightwave frequency-comb generator for generating a continuous-wave comb comprising a set of RF tones amplitude modulated onto a lightwave carrier.
112 Citations
44 Claims
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1. A waveform synthesizer comprising:
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(a) a RF-lightwave frequency-comb generator; and
(b) a multi-tone, frequency selective amplitude modulator coupled to the RF-lightwave frequency-comb generator for generating a continuous-wave comb comprising a set of RF tones amplitude modulated onto a lightwave carrier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of synthesizing a RF-modulated multi-tone lightwave waveform in the lightwave domain as well as a corresponding RF waveform in the RF domain, the method comprising the steps of:
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(a) generating component frequencies of the waveform in the lightwave domain;
(b) adjusting amplitudes of the component frequencies in the lightwave domain; and
(c) generating a RF waveform by photodetecting the modulated lightwave waveform. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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33. An optical multi-tone generator comprising multiple loops each having an optical delay line, the optical delay lines in the different loops having different lengths, at least one photodetector, and an optical intensity modulator, the at least two optical delay lines receiving an optical output of the optical intensity modulator, the output of optical intensity modulator also being supplied to the multi-tone, frequency selective amplitude modulator, the outputs of the two optical delay lines being detected by said at least one photodetector, the output of the detector being coupled to the optical intensity modulator.
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