Publications by authors named "Fengjuan Wei"
Temperature-insensitive hybrid interferometric liquid refractive index sensor.
Rev Sci Instrum
February 2021
A temperature-insensitive all fiber Fabry-Pérot (F-P) and Mach-Zehnder (M-Z) hybrid compact structure and its sensing characteristics are proposed and theoretically and experimentally demonstrated. In one sensor, two kinds of sensing principles are existing, which is shown in the sensing process that with the increase in the refractive index (RI) of the liquid, the dip wavelengths coming from the F-P interference do red-drift, and the dips from the M-Z interference do blue-drift, respectively. Due to the opposite shift and almost the same temperature sensitivities, the dip difference between M-Z and F-P refractometers is used to eliminate temperature cross-sensitivity and improve the RI sensitivity of the sensor.
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- Graphene's optical properties can be adjusted by changing the imaginary part of its conductivity, allowing for control over its polarization states.
- The in-fiber Mach-Zehnder interferometer (MZI) is highly sensitive to changes in the surrounding environment, which can enhance the functionality of the hybrid system.
- In this hybrid graphene-optical fiber MZI, interference wavelengths shift periodically with varying light polarization, showing distinct behaviors in response to different polarization states and light intensities.