Optimization of highly nonlinear dispersion-flattened photonic crystal fiber for supercontinuum generation |
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| Authors: | Zhang Ya-Ni |
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| Affiliation: | Department of Physics and Information Technology, Baoji University of Arts & Science, Baoji 721007, China The Faculty of Advanced Technology, University of Glamorgan, Pontypridd, CF37 1RP, UK |
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| Abstract: | A simple type of photonic crystal fiber (PCF) for supercontinuum generation is proposed for the first time. The proposed PCF is composed of a solid silica core and a cladding with square lattice uniform elliptical air holes, which offers not only a large nonlinear coefficient but also a high birefringence and low leakage losses. The PCF with nonlinear coefficient as large as 46 W-1·km-1 at the wavelength of 1.55 μm and a total dispersion as low as ± 2.5 ps·nm-1·km-1 over an ultra-broad waveband range of S-C-L band (wavelength from 1.46 μm to 1.625 μm) is optimized by adjusting its structure parameter, such as the lattice constant Λ, the air-filling fraction f, and the air-hole ellipticity η. The novel PCF with ultra-flattened dispersion, highly nonlinear coefficient, and nearly zero negative dispersion slope will offer a possibility of efficient super-continuum generation in the telecommunication windows using a few ps pulses. |
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| Keywords: | fiber optics and waveguides full vector finite element method confinement loss |
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