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High-sensitivity InP/InGaAs DHBT decision circuit-design and application in optical and system experiments at 40-43 Gbit/s

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4 Author(s)
Konczykowska, A. ; OPTO+, ALCATEL Res. & Innovation, Marcoussis, France ; Jorge, F. ; Idler, W. ; Godin, J.

A high-input-sensitivity decision D flip-flop integrated circuit was designed and fabricated in a self-aligned InP double heterojunction bipolar transistor technology (Ft=180 GHz, Fmax=220 GHz). Circuit measurements at 40 Gbit/s show excellent eye quality, 15-mV sensitivity, and good clock phase margin. Two optical experiments, i.e., assessment of decision circuit reamplifying, reshaping, and retiming capabilities in 40-Gbit/s nonreturn-to-zero (full rate) photoreceiver and 43-Gbit/s optical signal noise ratio measurement (21.8 dB/0.1 nm for 10-9 BER) are also presented.

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:53 ,  Issue: 4 )

Date of Publication:

April 2005

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