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21 April 2008 Broadband supercontinuum generation with photonic crystal fibers made of soft glass
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In this paper we report on the fabrication of a micro-structured fiber made of in-house synthesized silicate glass, with a nonlinear Kerr refractive index of 4.0 10-15 cm2/W. The micro-structured fiber uses three rings of holes around a slightly elliptical core with dimensions 2.6 μm x 3.4 μm. This fiber has a birefringence of about 10-3 at 1.5 μm and zero dispersion wavelengths at 860 nm and 870 nm. Using this fiber we have demonstrated ultra broadband supercontinuum generation in the range 400 - 1600 nm for 19.5 cm fiber sample pumped with 100 fs pulses with central wavelength of 755 nm and energy of 2 nJ. Broadband generation of 200 nJ in the range 650-850 nm with pulse energy on the level of 0.5 nJ is also observed with the same structure.
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Ryszard Buczynski, Dariusz Pysz, Ireneusz Kujawa, Jakub Korzeniowski, Tadeusz Martynkien, Tomasz Nasilowski, Francis Berghmans, Hugo Thienpont, and Ryszard Stepien "Broadband supercontinuum generation with photonic crystal fibers made of soft glass", Proc. SPIE 6990, Photonic Crystal Fibers II, 69900S (21 April 2008);

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