A5031211723- Advanced Fiber Optic Sensors
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Magneto-Optical Properties and Applications
- Advanced Measurement and Metrology Techniques
Guangzhou University
2021-2022
Southern Medical University
2021
An ultrasensitive refractive index (RI) sensor based on enhanced Vernier effect is proposed, which consists of two cascaded fiber core-offset pairs. One pair functions as a Mach-Zehnder interferometer (MZI), the other with larger core offset low-finesse Fabry-Perot (FPI). In traditional Vernier-effect sensors, an insensitive to environment change used sensing reference. Here in proposed sensor, interference fringes MZI and FPI shift opposite directions ambient RI varies, same direction...
The Vernier effect magnifies optical sensitivity by the superposition of two spectra with slightly shifted frequencies from a sensing interferometer (SIM) and reference (RIM). In this study, we demonstrate that can be obtained through single interferometer, which detects changed signal provides an artificial spectrum (ARS) to superposed spectrum. ARS extracted spatial frequency down-conversion one in processing is not affected environmental changes detuned at arbitrarily small amount...
Ultrasensitive refractive index (RI) sensing based on novel Vernier-effect demodulation through a single fiber Fabry–Perot interferometer (FFPI) is proposed and demonstrated. A core-offset pair used as an FFPI for RI sensing. An artificial reference spectrum (ARS) obtained by modulating extracting twice The Vernier effect realized superimposing the with ARS. By optimizing cavity length of free range (FSR) ARS, ultrahigh sensitivity 133948.33 nm/refractive unit (RIU) magnification factor...