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 CO<sub>2</sub> laser beam, are highly compact, and they are expected to be temperature stable.
© 2003 Optical Society of America
G. Kakarantzas, A. Ortigosa-Blanch, T. A. Birks, P. St. J. Russell, L. Farr, F. Couny, and B. J. Mangan, "Structural rocking filters in highly birefringent photonic crystal fiber," Opt. Lett. 28, 158-160 (2003)