Design of highly nonlinear octagonal photonic crystal fiber with near-zero flattened dispersion at 1.31μm waveband

• DOI: 10.1007/s10043-011-0082-3
• Publication Date: 2011-11-25T05:44:55Z
• Authors: Yoshinori Namihira; Jingjing Liu; Taito Koga; Feroza Begum; Md. Anwar Hossain; Nianyu Zou; Shubi F. Kaijage; Yuki Hirako; Hiroki Higa; Md. Asraful Islam
• Keywords: Supercontinuum; Nonlinear photonic crystal; Wideband

This paper presents a highly nonlinear octagonal photonic crystal fiber (HN-OPCF) with a Ge-doped core for dental optical coherence tomography (OCT) applications. The simulation results show that a nonlinear coefficient of 56.3W−1 km−1 and the flattened dispersion of less than −1:0 ps/(nm·km) are obtained in 75 nm waveband (1265–1340 nm). Owing to its high nonlinear coefficient and flattened dispersion, the HN-OPCF is expected to be suitable for supercontinuum generation, which is very important in OCT applications. The numerical simulation results demonstrate that the proposed HN-OPCF can generate wideband supercontinuum.