IEEE Photonics Journal (Jan 2017)

Analysis and Experimental Study of a Silicon Photonic Single MRM-Assisted MZI PAM-4 Modulator

  • Rui Li,
  • David Patel,
  • Alireza Samani,
  • Eslam El-Fiky,
  • Yun Wang,
  • Zhenping Xing,
  • Luhua Xu,
  • David V. Plant

DOI
https://doi.org/10.1109/JPHOT.2017.2774763
Journal volume & issue
Vol. 9, no. 6
pp. 1 – 7

Abstract

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We report on the analysis and experimental study of a silicon photonic single microring modulator (MRM) assisted Mach-Zehnder interferometer for high-speed four-level pulse amplitude modulation (PAM-4). The static extinction ratio (ER) of the proposed device is 18 dB larger than that of a single MRM with the same design parameters. Under 0 V reverse bias voltage, the measured 3-dB electro-optic bandwidth of the device is 20 GHz. Based on the enhancement of the ER, the measured 40 Gb/s on-off keying eye diagram of the device shows larger modulation amplitude than that of the single MRM. We further present 76 Gb/s PAM-4 using the proposed device in a back-to-back configuration, with the measured bit error rate below the hard-decision forward error correction threshold of 3.8 × 10-3.

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