Electro-optic modulator drift compensation based on DSP system

This paper presents a study concerning the improvement of an electro-optic modulator operation by controlling its optical bias point. The evolution of the modulator characteristics can be followed through its non-linear behavior by detecting the second harmonic of a low-frequency modulating signal....

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Bibliographic Details
Published inThe 2012 International Conference on Advanced Technologies for Communications pp. 367 - 370
Main Authors Pham Toan Thang, Vu Van Yem, Bach Gia Duong, Journet, B.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2012
Subjects
Digital signal processing
Electrodes
Electrooptic modulators
Frequency modulation
Transfer functions
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Summary:This paper presents a study concerning the improvement of an electro-optic modulator operation by controlling its optical bias point. The evolution of the modulator characteristics can be followed through its non-linear behavior by detecting the second harmonic of a low-frequency modulating signal. The control system has been implemented in a kit based on a DSP board and a data acquisition card; it is designed in order to keep the bias point at the optimal value for minimizing the second order non-linear effects. So it is possible to compensate completely the effects of the modulator transfer function drift for more than 8 hours.
ISBN:9781467343510
146734351X
ISSN:2162-1020
2162-1039
DOI:10.1109/ATC.2012.6404295