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Ten‐GHz MMIC‐predistortion circuit for improved dynamic range of broadband analog fiber‐optic link
Author(s) -
Zhang L.,
Myslinski P.,
Chrostowski J.,
Hua H.,
Berolo O.,
Lee J.,
Harlow F.
Publication year - 1996
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(19960420)11:6<293::aid-mop1>3.0.co;2-e
Subject(s) - predistortion , spurious free dynamic range , monolithic microwave integrated circuit , dynamic range , broadband , amplifier , high dynamic range , wideband , electronic engineering , electrical engineering , optical modulator , engineering , telecommunications , phase modulation , cmos , phase noise
A MMIC predistortion circuit that operates at up to 10 GHz and improves the spurious free dynamic range of a broadband analog fiber‐optic link from 108 dB/Hz 2/3 to 111 dB/Hz 2/3 is developed. The experimental results agree with the performed theoretical analysis, indicating that the link dynamic range improvement through the predistortion technique is limited by the high driving voltage of a standard LiNbO 3 Mach‐Zehnder modulator, that is, by the third‐order intercept point of commercial microwave broadband power amplifiers. To overcome this limitation a low‐voltage modulator should be employed. © 1996 John Wiley & Sons, Inc.