20 November 2008 Rocking filters fabricated in birefringent photonic crystal fiber
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Proceedings Volume 7141, 16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics; 71410I (2008) https://doi.org/10.1117/12.822363
Event: 16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 2008, Polanica Zdroj, Poland
Abstract
We demonstrate an efficient higher order rocking filter, which resonantly couples polarization modes guided in birefringent photonic crystal fibers. The grating was inscribed in the birefringent fiber with two large holes adjacent to the core by periodic mechanical twisting and heating with an arc fusion splicer. Because in photonic crystal fibers the phase birefringence is very dispersive and increases against wavelength, the phase matching between coupled modes can be obtained simultaneously at several wavelengths. In particular, we demonstrate that for the grating period Λ =8 mm, resonant coupling can be obtained at three different wavelengths. The first order coupling (-13dB) is obtained for Λ = LB . This condition is fulfilled at λ = 856 nm. The second order coupling (-20dB) is obtained for Λ = 2LB at λ =1270 nm and the third order coupling (- 17dB) occurs for Λ = 3LB at λ =1623 nm. The length of the filter was 9.6 cm, which corresponds to 13 periodic twists. We also present the results of sensitivity measurements of this filter to hydrostatic pressure and temperature.
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Gabriela Statkiewicz-Barabach, Gabriela Statkiewicz-Barabach, Alicja Anuszkiewicz, Alicja Anuszkiewicz, Waclaw Urbanczyk, Waclaw Urbanczyk, Jan Wojcik, Jan Wojcik, } "Rocking filters fabricated in birefringent photonic crystal fiber", Proc. SPIE 7141, 16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 71410I (20 November 2008); doi: 10.1117/12.822363; https://doi.org/10.1117/12.822363
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