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Opt Lett. 2005 Dec 1;30(23):3126-8.

Apodization of elliptical-core two-mode fiber acousto-optic filter based on acoustic polarization control.

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  • 1Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon, South Korea.


We propose and demonstrate a novel apodization technique for an elliptical-core two-mode fiber acousto-optic filter by twisting the fiber and adjusting the acoustic polarization. The sidelobe suppression in the filter spectrum was improved from -9.7 to -15.5 dB. A theoretical analysis that includes acoustic birefringence explains the experimental results with good agreement.

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