Ultrasensitive optical microfiber coupler based sensors operating near the turning point of effective group index difference

• Main Authors: Zhang, Nan, Li, Kaiwei, Zhang, Ting, Liu, Guigen, Zhang, Mengying, Wei, Lei
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2017
• Subjects: Polarization; Optical sensors
• Online Access: https://hdl.handle.net/10356/83935; http://hdl.handle.net/10220/42881
• Institution: Nanyang Technological University

We propose and study an optical microfiber coupler (OMC) sensor working near the turning point of effective group index difference between the even supermode and odd supermode to achieve high refractive index (RI) sensitivity. Theoretical calculations reveal that infinite sensitivity can be obtained...