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Optical Engineering

Performance analysis of automatic feedback control for multiple bias voltages in optical quadrature phase-shift keying modulator
Author(s): Jianchao Cao; Yanfu Yang
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Paper Abstract

We study the performance of automatic bias control for three bias voltages in optical quadrature phase-shift keying modulator. The interaction between multiple bias controls for two Mach-Zehnder modulators’ (MZMs’) bias voltages and a Mach-Zehnder interferometer’s (MZI’s) bias voltage is analyzed theoretically. The condition for achieving global extremum of the monitored optical power with two MZMs’ bias voltages at the null transmission points is also studied by numerical simulations. The results show that the bias voltages of two MZMs can be controlled regardless of the MZI’s bias voltage and can avoid the risk of trapping in local extremum if the driver signal amplitude operates in the proper range.

Paper Details

Date Published: 18 February 2013
PDF: 7 pages
Opt. Eng. 52(2) 025009 doi: 10.1117/1.OE.52.2.025009
Published in: Optical Engineering Volume 52, Issue 2
Show Author Affiliations
Jianchao Cao, Harbin Institute of Technology (China)
Yanfu Yang, Harbin Institute of Technology (China)

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