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oe1(光电查) - 科学论文

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  • An optical fiber strain sensor by using of taper based TCF structure

    摘要： We propose an optical fiber strain sensor consisting of a spliced twin-core fiber (TCF). The sensor structure has two fiber tapers, which are weak taper and T-shaped taper. The taper waist of T-shaped taper is about half-size of the weak taper, but the length of the T-shaped taper is also about half-length of the weak taper. In the sensing structure, core mode and cladding modes of the TCF are excited simultaneously. Two tapered regions around the splicing interfaces can play the roles of splitting and combining the modes in the fiber. In experiment, the proposed device has good quality interferometric spectra, and the highest extinction ratio of 20 dB is achieved. When the stress increases from 0 με to 841.5 με, different wavelength sensitivities of 3.31 pm/με and 6.11 pm/με are achieved. Different intensity sensitivities of 7.5 × 10?3 dB/με and 9.9 × 10?3 dB/με are also achieved, respectively. The sensor has shown good test stability and low temperature sensitivity, which is good for precise strain measurement in practical applications.

    关键词： Twin-core fiber,Fiber design and fabrication,Fiber optical sensor

    更新于2025-11-28 14:23:57

  • All-optical graphene-oxide humidity sensor based on a side-polished symmetrical twin-core fiber Michelson interferometer

    摘要： 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 exposed polished core has a stronger evanescent field and enhances the interaction between light and external environment. 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. The high-performance GO-SPTCFMI is a promising candidate for potential applications, such as gas sensing and biochemical detection.

    关键词： side-polished fiber,graphene oxide,Humidity sensor,twin core fiber,interferometer.

    更新于2025-09-23 15:23:52