Open AccessLight beam coupling between standard single mode fibers and highly nonlinear photonic crystal fibers based on the fused biconical tapering technique
Author(s) -
Jianguo Liu,
Tee-Hiang Cheng,
YongKee Yeo,
Yixin Wang,
Lifang Xue,
Zhaowen Xu,
Dawei Wang
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.003115
Subject(s) - tapering , optics , photonic crystal fiber , materials science , single mode optical fiber , fresnel equations , optical fiber , coupling (piping) , fusion splicing , beam (structure) , optoelectronics , refractive index , composite material , physics , computer graphics (images) , computer science
We propose and experimentally demonstrate light beam coupling between a single-mode fiber (SMF) and a highly nonlinear photonic crystal fiber (HN-PCF) based on the fused biconical tapering (FBT) technique. In our experiment, a standard SMF is pre-tapered to match its propagation constant to that of a HN-PCF. In order to remove the condensation in the air holes, the temperature is increased gradually to preheat the fibers. An appropriate level of hydrogen flow is administered to avoid the air-hole collapse. As a result, coupling ratio exceeding 90% between the SMF and HN-PCF is achieved. This technique avoids back Fresnel reflection, mode-field diameter (MFD) mismatch and fiber-core misalignment, bubble generation and air-hole collapse in the interface fusion splice.