We propose a microfluidic refractive index sensor based on new polymer twin-core photonic bandgap fiber (PBGF). The sensor can achieve ultrahigh detection limit, i.e. >1.4times10 -7 RIU refractive index unit (RIU), by measuring the coupling wavelength shift.
Alok Kumar PaulAjay Krishno SarkarAbu Bakar Siddiqur RahmanAbdul Khaleque
Darran K. C. WuBoris T. KuhlmeyBenjamin J. Eggleton