Title
Analog I/Q FIR Filter in 55-nm SiGe BiCMOS for 16-QAM Optical Communications at 112 Gb/s
Abstract
We propose a novel implementation of a complex analog equalization filter for the compensation of frequency-dependent variations in coherent optical links. The analog compensation filter can be used in coherent-lite optical communication links where digital signal processing (DSP) is removed to limit the complexity and power consumption. In these links, the filter can compensate for electrical bandwidth limitations and distortion introduced by chromatic dispersion in the fiber. The complex filter is implemented by combining four distributed analog finite-impulse response (FIR) filters to obtain the necessary response. The filter delays are implemented using active delay cell structures to create a compact solution. The analog filter is implemented in a 55-nm BiCMOS technology and consumes 185-mW core power for five complex filter taps. Performance is evaluated using the S-parameter measurements, noise and linearity measurements, and real-time system experiments using 112-Gb/s 16-QAM-modulated signals.
Year
DOI
Venue
2020
10.1109/JSSC.2020.2987732
IEEE Journal of Solid-State Circuits
Keywords
DocType
Volume
Finite impulse response filters,Optical fiber communication,Equalizers,Dispersion,Optical polarization,Optical transmitters,Delays
Journal
55
Issue
ISSN
Citations 
7
0018-9200
0
PageRank 
References 
Authors
0.34
0
7
Name
Order
Citations
PageRank
Michiel Verplaetse100.68
Joris Lambrecht200.34
Michael Vanhoecke312.07
Laurens Breyne402.70
Hannes Ramon500.34
Piet Demeester63471363.78
Guy Torfs700.34