Abstract
A high-sensitive graphene-oxide (GO) humidity sensor based on a side-polished twin- core fiber (SPTCF) Michelson interferometer (MI) has been demonstrated. The MI was fabricated by splicing a section of TCF to a standard single mode fiber (SMF) and tapering the splicing point. The GO-SPTCFMI can operate in the wavelength- and intensity- modulated sensor. The super- high humidity sensitivities of ~2.72 nm/RH% in the RH range of 40-75% and ~3.76 dB/RH% in the RH range of 60-62.1% are obtained experimentally.
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