A photonic crystal fiber (PCF) structure in Ga–Sb–S-based chalcogenide glass has been designed for nonlinear applications. The propagation characteristics of the designed structure have been investigated by employing COMSOL multiphysics software based on a full-vectorial finite element method. The proposed PCF structure possesses a nonlinear coefficient as high as 14.92  W−¹ m−¹ with the effective mode area of 3.37  μm² at the operating wavelength of 1.55  μm. The proposed structure exhibits a flat and low dispersion value between spectral spanning 2.4 and 2.7  μm with a maximum dispersion variation of 20  ps/nm km. To the best of our knowledge, the PCF design is investigated for first time in Ga–Sb–S-based chalcogenide glass. The structure possesses a zero dispersion wavelength value at 2.6  μm. The structure is a promising candidate for nonlinear applications, such as midinfrared supercontinuum generation, slow-light generation, and midinfrared fiber lasers.

Date Published: 10 July 2017
PDF: 9 pages
J. Nanophoton. 11(3) 036002 doi: 10.1117/1.JNP.11.036002
Published in: Journal of Nanophotonics Volume 11, Issue 3