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Hosseini SE, Banai A. Theoretical investigation of the capture effect in intensity-modulation direct-detection microwave photonic links. Appl Opt. 2013;52(28):7011-21doi: 10.1364/AO.52.007011.
Hosseini, S. E., & Banai, A. (2013). Theoretical investigation of the capture effect in intensity-modulation direct-detection microwave photonic links. Applied optics, 52(28), 7011-21. https://doi.org/10.1364/AO.52.007011
Hosseini, Seyyed Esmail, and Banai, Ali. "Theoretical investigation of the capture effect in intensity-modulation direct-detection microwave photonic links." Applied optics vol. 52,28 (2013): 7011-21. doi: https://doi.org/10.1364/AO.52.007011
Hosseini SE, Banai A. Theoretical investigation of the capture effect in intensity-modulation direct-detection microwave photonic links. Appl Opt. 2013 Oct 01;52(28):7011-21. doi: 10.1364/AO.52.007011. PMID: 24085217.
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Appl Opt. 2013 Oct 01;52(28):7011-21. doi: 10.1364/AO.52.007011.

Theoretical investigation of the capture effect in intensity-modulation direct-detection microwave photonic links.

Applied optics

Seyyed Esmail Hosseini, Ali Banai

PMID: 24085217 DOI: 10.1364/AO.52.007011

Abstract

We introduce the capture effect concept in microwave photonic links (MWPLs) for the first time to our knowledge. The capture effect or the small-signal suppression is the change in the amplitude ratio of the two signals between input and output of the intensity-modulation direct-detection (IMDD) MWPLs. An analytical explanation of the performance of external IMDD MWPLs due to the effects of nonlinearity combined with sum of several input sinusoidal signals is given. We have investigated the suppression of a weaker signal in these links. General analytic expression for the small-signal suppression is derived using a nonlinear analytical approach. We show that the small-signal suppression is quite dependent on the input back-off, the power ratio of input signals, and on the number of input sinusoidal signals. The theoretical maximum possible signal suppression was found to be 6 dB. This analytical asymptotic value is verified by numerical results. We show the influence of the capture effect of the nonlinear MWPL on the optoelectronic oscillator operation that is verified by experimental data in the literature that has already been published.

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