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A 54-GHz distributed amplifier with 6-VPP output for a 40-Gb/s LiNbO3 modulator driver

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4 Author(s)
Shigematsu, Hisao ; Fujitsu Labs. Ltd., Atsugi, Japan ; Sato, M. ; Hirose, Tatsuya ; Watanabe, Y.

We have developed a distributed amplifier for a LiNbO3 modulator driver using double-doped AlGaAs-InGaAs-AlGaAs pseudomorphic high electron mobility transistors (p-HEMTs). By using a stabilization and negative resistance control technique with source inductance and grounded coplanar waveguided lines, we obtained a gain of 15 dB, a bandwidth of 54 GHz, and 6-VPP output. These results indicate that our circuit is a leading candidate for use as a LiNbO3 modulator driver in 40-Gb/s fiber-optic communication systems.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:37 ,  Issue: 9 )