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All-solid photonic band gap fiber based distributed fiber optic pressure sensor.
1School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China.
Optics Express
|June 21, 2012
Summary
This study introduces a new distributed fiber optic pressure sensor using photonic crystal fiber (PCF). It can simultaneously detect both the pressure applied and its exact location along the fiber.
Area of Science:
- Optoelectronics
- Fiber Optics
- Photonics
Background:
- Distributed fiber optic sensors offer remote sensing capabilities.
- Photonic crystal fibers (PCFs) provide unique light manipulation properties.
- Existing fiber optic sensors may lack simultaneous pressure and location interrogation.
Purpose of the Study:
- To propose and demonstrate a novel distributed fiber optic pressure sensor.
- To achieve simultaneous interrogation of pressure and its position along the fiber.
- To utilize an all-solid photonic band gap fiber for enhanced sensing.
Main Methods:
- Fabrication involved splicing a photonic crystal fiber (PCF) with a single-mode fiber (SMF).
- A high-reflectivity coating (99%) was applied to the PCF end face.
- Cladding mode excitation at the splice point created an interferometer for sensing.
Main Results:
- The sensor successfully interrogated both pressure and its position along the PCF.
- Pressure location was determined by measuring the interferometer's phase difference.
- Pressure magnitude was measured by analyzing the white-light optical spectrum.
Conclusions:
- The developed sensor enables simultaneous distributed pressure and location sensing.
- The all-solid PCF-based design offers a promising approach for advanced fiber optic sensing.
- This technology has potential applications in structural health monitoring and industrial process control.
