A Fifth-Order Polynomial Predistortion Circuit for Mach-Zehnder Modulator Linearization in 65nm CMOS
Conference Paper
Overview
Research
Identity
Additional Document Info
Other
View All
Overview
abstract
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.
name of conference
2017 Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS)