A Fifth-Order Polynomial Predistortion Circuit for Mach-Zehnder Modulator Linearization in 65nm CMOS Conference Paper uri icon


  • © 2017 IEEE. Future RF photonic systems offer the promise of wideband front-end operation, but are limited by linearity in the electrical-to-optical conversion process. This paper presents a fifth-order polynomial predistortion circuit for optical Mach-Zehnder modulator linearization. Inclusion of independently tunable polynomial coefficients provides the flexibility to suppress both third-order (IM3) and fifth-order (IM5) intermodulation products. Fabricated in 65nm CMOS, the predistortion circuit achieves a measured IM3 suppression of 19.5dB and 17.1dB with modulation indexes of 49.6% and 60%, respectively.

author list (cited authors)

  • Okyere, J., Yu, K., Entesari, K., & Palermo, S.

citation count

  • 0

publication date

  • March 2017