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Opt Lett. 2005 Jan 1;30(1):20-2.

Compensation of polarization-dependent loss in transmission fiber gratings by use of a Sagnac loop interferometer.

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1
Beckman Laser Institute, University of California, Irvine, Irvine, California 92612, USA. cskim@laser.bli.uci.edu

Abstract

We analyze the transmission characteristics of a Sagnac loop interferometer containing a polarization-dependent loss element and lossless polarization-converting elements by use of Jones matrices. We show that polarization independence in the transmission mode can be achieved in such a configuration and that maximum transmittance occurs when a half-wave plate is used for the polarization-converting element. The result is verified experimentally for a fiber acousto-optic tunable filter and cascaded long-period fiber gratings with either intrinsic or process-induced polarization-dependent filtering characteristics.

PMID:
15648624
[Indexed for MEDLINE]
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