Temperature-insensitive refractive index sensor based on in-fiber Michelson interferometer.

Highlights: [•] We fabricated a refractive index sensor based on in-fiber Michelson interferometer. [•] The sensor has the advantages of short size (less than 2mm) and easy fabrication. [•] We use the method of intensity-modulated to solve cross sensitivity. [•] The sensor has the sensitivity of −208.24dB/RIU at the refractive index of 1.440. [•] The sensor could apply in the fields of chemical and biomedical sensing. [Copyright &y& Elsevier]