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Proceedings Paper

The least DOFs required for a polarization controller in PMD compensator
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Paper Abstract

Automatically controlled polarization controllers (PC) are the essential integral parts in an automatic compensator for polarization mode dispersion (PMD). It is suggested by Prof. M. Karsson et al. at Charlmers University of Technology, and afterward widely accepted that we need to adjust only two waveplate PC (two degrees of freedom, DOF) for each stage PMD compensator to complete PMD compensation. It is equivalent to say that only two of degrees of freedom for each PC are needed to complete the state of polarization (SOP) transformation from any input state into any other state covering the entire Poincare Sphere. In this paper will take two types of commercial available PC as examples to prove theoretically and experimentally that except for the reset-free problem it is necessary to adjust at least three instead of two waveplates in order to transform any input state into any other state covering the entire Poincare Sphere. Therefore we can achieve complete PMD compensation at least using 3 DOF instead 2 PC in each stage PMD compensator.

Paper Details

Date Published: 11 November 2008
PDF: 6 pages
Proc. SPIE 7134, Passive Components and Fiber-based Devices V, 713425 (11 November 2008); doi: 10.1117/12.803279
Show Author Affiliations
Xiaoguang Zhang, Beijing Univ. of Posts and Telecommunications (China)
Gaoyan Duan, Beijing Univ. of Posts and Telecommunications (China)
Lixia Xi, Beijing Univ. of Posts and Telecommunications (China)


Published in SPIE Proceedings Vol. 7134:
Passive Components and Fiber-based Devices V
Ming-Jun Li; Ping Shum; Ian H. White; Xingkun Wu, Editor(s)

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