Light beam coupling between standard single mode fibers and highly nonlinear photonic crystal fibers based on the fused biconical tapering technique.
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.
Liu
Jianguo
J
School of Electrical & Electronic Engineering, Nanyang Technological University, 639798, Singapore. jgliu@ntu.edu.sg
Cheng
Tee-Hiang
TH
Yeo
Yong-Kee
YK
Wang
Yixin
Y
Xue
Lifang
L
Xu
Zhaowen
Z
Wang
Dawei
D