Gas Refractometer Based on Optical Fiber Extrinsic Fabry—Perot Interferometer With Open Cavity

@article{Wang2015GasRB,
  title={Gas Refractometer Based on Optical Fiber Extrinsic Fabry—Perot Interferometer With Open Cavity},
  author={Ruohui Wang and Xueguang Qiao},
  journal={IEEE Photonics Technology Letters},
  year={2015},
  volume={27},
  pages={245-248}
}
In this letter, we proposed a gas refractometer based on optical fiber Fabry-Perot interferometer with an open cavity. The Fabry-Perot cavity is a short section capillary tube spliced between a single-mode fiber and a side-hole fiber (SHF). The unique cladding of the SHF enables gas entering or leaving the Fabry-Perot cavity freely. The measurement of pressure-induced refractive index change of nitrogen gas has been demonstrated by monitoring the wavelength shift of the interference pattern… CONTINUE READING

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