Implementation of a precise quadrature point bias controller to the integrated intensity electro-optic modulator

A broadband electro-optic modulating unit forms a key part of a specialized transmission system for needs of measurements. The modulating unit is based on an integrated analog intensity modulator of Mach-Zehnder type. A proper adjustment of modulator operating point significantly affects performance...

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Bibliographic Details
Published in2012 13th Biennial Baltic Electronics Conference pp. 133 - 136
Main Author Svarny, J.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2012
Subjects
Broadband communication
Electrooptic modulators
Harmonic analysis
Optical fibers
Optical interferometry
Power harmonic filters
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ISBN9781467327756
1467327751
ISSN1736-3705
DOI10.1109/BEC.2012.6376834

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Summary:A broadband electro-optic modulating unit forms a key part of a specialized transmission system for needs of measurements. The modulating unit is based on an integrated analog intensity modulator of Mach-Zehnder type. A proper adjustment of modulator operating point significantly affects performance of the modulator and consequently of the whole transmission system as well. The paper deals with design and implementation of a specialized driver - a bias circuit for extremely precise set-up of optimal operating point of the modulator. The driver operates on principle of suppression of second harmonic component detected at the modulator output during excitation of bias port with a low-frequency harmonic signal.
ISBN:9781467327756
1467327751
ISSN:1736-3705
DOI:10.1109/BEC.2012.6376834