2015
DOI: 10.1109/lpt.2015.2421329
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An Optical Technique for Radio Frequency Interference Mitigation

Abstract: A new photonics-based approach for interference mitigation utilizing the nonlinear response of optical modulators is described. The technique is analyzed both theoretically and experimentally with excellent agreement. Proof-of-concept experiments demonstrate upward of 78-dB suppression of a large interfering signal, while degrading the response to small signals of interest by only 8 dB.

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Cited by 22 publications
(3 citation statements)
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“…Some of the former have been outlined here. Some architectural techniques might include cascaded approaches on the E/O side [35,36] and/or the O/E side [37]. Ultimately, these types of approaches need to be evaluated on a case-by-case basis, where system requirements will determine the possible photonic designs.…”
Section: Discussionmentioning
confidence: 99%
“…Some of the former have been outlined here. Some architectural techniques might include cascaded approaches on the E/O side [35,36] and/or the O/E side [37]. Ultimately, these types of approaches need to be evaluated on a case-by-case basis, where system requirements will determine the possible photonic designs.…”
Section: Discussionmentioning
confidence: 99%
“…An MZM can be modulated at a higher modulation depth, however the fundamental transfer function is sinusoidal. Increasing the modulation depth and forcing a more square wave output results in distortion in the link which manifests as third order nonlinearity which may negatively affect the probe performance [17,18]. To achieve the maximum extinction ratio of 30 dB for the MZM, a feedback loop on one of the output ports of the MZM is required to reduce the drift over time of the extinction ratio.…”
Section: Photodiode Modulationmentioning
confidence: 99%
“…There have been multiple attempts to solve this problem aided by photonic systems. Interference cancellation, where the signal of interest is separated from added noise have been experimentally demonstrated using tunable delays [14], [15], semiconductor optical amplifiers [16], [17], dispersive elements [18], microring resonators (MRRs) [19] or the nonlinear response of optical modulators [20]. Furthermore, a more general scheme based on the broadcast-and-weight (B&W) protocol using MRRs to perform the matrix multiplications in optical domain have been theoretically studied and great improvements in terms of bandwidth and energy consumption over DSP systems have been calculated [21].…”
Section: Introductionmentioning
confidence: 99%