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Journal of Lightwave Technology

Journal of Lightwave Technology


  • Vol. 28, Iss. 20 — Oct. 15, 2010
  • pp: 3019–3028

Silicon RF-Photonic Filter and Down-Converter

Kun-Yii Tu, Mahmoud S. Rasras, Douglas M. Gill, Sanjay S. Patel, Young-Kai Chen, Alice E. White, Andrew Pomerene, Daniel Carothers, James Beattie, Mark Beals, Jurgen Michel, and Lionel C. Kimerling

Journal of Lightwave Technology, Vol. 28, Issue 20, pp. 3019-3028 (2010)

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An RF-photonic filter and down-converter system based on a compact and fully tunable silicon optical filter has been demonstrated and analyzed. Its frequency down-conversion was implemented using optical heterodyne detection with an injection locked laser. This system filters a 1.25 GHz-wide signal with $>20$ dB filter rejection and a very broad 20 GHz center tuning range. The frequency down-conversion process is operated in a low-IF mode to avoid laser low frequency noises. Measured system Spurious-Free Dynamic Range (SFDR) of 94.3 dB*Hz$^{2/3}$ has been limited by the optical losses from I/O coupling and measurement setup. We examined experimentally that 105.3 dB*Hz$^{2/3}$ SFDR is achievable if the encountered optical loss were reduced to the filter's intrinsic loss. Based on the excellent agreements between measured and simulated results, we explore the critical improvements of the silicon photonic devices needed for the system to achieve 118 dB*Hz$^{2/3}$ SFDR and briefly review the status of the component technologies.

© 2010 IEEE

Kun-Yii Tu, Mahmoud S. Rasras, Douglas M. Gill, Sanjay S. Patel, Young-Kai Chen, Alice E. White, Andrew Pomerene, Daniel Carothers, James Beattie, Mark Beals, Jurgen Michel, and Lionel C. Kimerling, "Silicon RF-Photonic Filter and Down-Converter," J. Lightwave Technol. 28, 3019-3028 (2010)

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