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Design of an opto-electronic modulator driver amplifier for 40-Gb/s data rate systems

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3 Author(s)
A. Long ; Bookham Technol., Towcester, UK ; J. Buck ; R. Powell

This paper describes the design and performance of a broad-band driver amplifier for 40-Gb/s noreturn-to-zero system applications. The function of the amplifier is to raise the output from a multiplexer (nominally 0.4 V peak to peak) to a level of ∼5 Vp-p, which is suitable to drive a GaAs-based Mach-Zehnder optoelectronic modulator. The amplifier module contains two GaAs pseudomorphic high-electron mobility transistor traveling-wave MMICs fabricated on a 0.2-μm gate process. The design issues relating to the specific requirements of a modulator driver amplifier and the techniques to resolve them are described.

Published in:

Journal of Lightwave Technology  (Volume:20 ,  Issue: 12 )