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Published on: November 30, 2012
Refractive index measurement using photonic crystal fiber-based Fabry-Perot interferometer
Ming Deng1, Chang-Ping Tang, Tao Zhu
1Key Laboratory of Optoelectronic Technology and Systems (Education Ministry of China), Chongqing University, Chongqing 400044, China.
Applied Optics
|March 20, 2010
Summary
A new fiber optic sensor using a Fabry-Perot interferometer (FPI) can detect changes in refractive index (RI). This novel refractometer demonstrates high sensitivity and potential for various sensing applications.
Area of Science:
- Optoelectronics
- Fiber Optics
- Sensor Technology
Background:
- Refractive index (RI) sensing is crucial for material characterization and environmental monitoring.
- Fiber optic sensors offer advantages like remote sensing, immunity to electromagnetic interference, and miniaturization.
Purpose of the Study:
- To develop and characterize a novel fiber optic refractive index sensor.
- To demonstrate the sensor's capability for monitoring RI changes in gases.
- To evaluate the sensor's sensitivity and hysteresis.
Main Methods:
- Construction of a fiber optic Fabry-Perot interferometer (FPI) sensor.
- Splicing a hollow core fiber between single-mode fiber and photonic crystal fiber (PCF).
- Utilizing the air holes in PCF cladding for substance infiltration and RI modulation.
Main Results:
- The sensor successfully monitored RI changes in air at varying pressures.
- Achieved a high RI sensitivity of 805.1 microm/RIU.
- Observed no hysteresis in the sensor's response.
Conclusions:
- The developed in-fiber refractometer is a sensitive and reliable RI sensing device.
- The easy fabrication method suggests broad potential applications in diverse sensing fields.
- This technology offers a promising platform for advanced optical sensing solutions.
