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Journal of Lightwave Technology

Journal of Lightwave Technology


  • Vol. 32, Iss. 1 — Jan. 1, 2014
  • pp: 35–39

Double-Ring Resonance-Enhanced Linear Photonic Frequency Discriminator for Microwave-Photonic Links

Jaehyun Kim and Christi K. Madsen

Journal of Lightwave Technology, Vol. 32, Issue 1, pp. 35-39 (2014)

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The design of a photonic frequency discriminator with enhanced linearity is proposed and analyzed. The discriminator consists of a Mach–Zehnder Interferometer and two ring resonators which linearize the magnitude and phase response, respectively. The discriminator is flexible as it can be switched between linear-intensity and linear-field regimes. The linearity of the discriminator is demonstrated by simulating the third-order intermodulation distortion (IMD3) and corresponding third-order output intercept point (OIP3). Simulation results show that the linearity of the phase response plays a critical role in suppressing IMD3 and resonance-enhanced IMD3 suppression by the double-ring structure is observed. Corresponding OIP3 even exceeds that of a perfect linear intensity discriminator.

© 2013 IEEE

Jaehyun Kim and Christi K. Madsen, "Double-Ring Resonance-Enhanced Linear Photonic Frequency Discriminator for Microwave-Photonic Links," J. Lightwave Technol. 32, 35-39 (2014)

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