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Opt Lett. 2003 Feb 1;28(3):158-60.

Structural rocking filters in highly birefringent photonic crystal fiber.

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  • 1Optoelectronics Group, Department of Physics, University of Bath, Claverton Down, Bath, BA2 7AY, UK. pysgk@bath.ac.uk


We report what we believe is the first example of efficient rocking filter formation in polarization-maintaining photonic crystal fiber. Very high coupling efficiencies (as much as -23.5-dB suppression of the input polarization) and loss of < 0.02 dB were achieved for fibers as short as 11 mm. The filters, which we prepared by periodic mechanical twisting and heating with a scanned CO2 laser beam, are highly compact, and they are expected to be temperature stable.

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