Study of a PMD Tolerance Extension by InP HBT Analog EDC IC without Adaptive Control in 43G DQPSK Transmission

Toshihiro ITOH
Kimikazu SANO

IEICE TRANSACTIONS on Electronics   Vol.E93-C    No.5    pp.573-578
Publication Date: 2010/05/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E93.C.573
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Fundamentals and Applications of Advanced Semiconductor Devices)
Category: Compound Semiconductor Devices
electronic dispersion compensation,  feed-forward equalizer,  43G RZ-DQPSK,  

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We experimentally studied the polarization mode dispersion (PMD) tolerance of an feed-forward equalizer (FFE) electronic dispersion compensation (EDC) IC in the absence of adaptive control, in 43-Gbit/s RZ-DQPSK transmission. Using a 3-tap FFE IC composed of InP HBTs, differential group delay (DGD) tolerance at a 2-dB Q penalty is shown to be extended from 25 ps to up to 29 ps. When a polarization scrambler is used, the tolerance is further extended to 31 ps. This value is close to the tolerance obtained with adaptive control, without a polarization scrambler.