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Multibeam Interferometer Using a Photonic Crystal Fiber with Two Asymmetric Cores for Torsion, Strain and Temperature
Khurram Naeem1, Il-Bum Kwon2, Youngjoo Chung3
1Center for Safety Measurement, Korea Research Institute of Standards and Science (KRISS), 267 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea. knaeem@kriss.re.kr.
Sensors (Basel, Switzerland)
|January 14, 2017
Summary
We developed a fiber-optic multibeam Mach-Zehnder interferometer (m-MZI) for sensing torsion, strain, and temperature simultaneously. This novel device uses dual-core photonic crystal fiber for enhanced multi-parameter measurement capabilities.
Area of Science:
- Optoelectronics
- Fiber Optics
- Sensing Technology
Background:
- Mach-Zehnder interferometers (MZIs) are crucial optical sensing tools.
- Multiplexed sensing requires advanced interferometer designs.
- Photonic crystal fibers offer unique properties for optical sensing.
Purpose of the Study:
- To introduce a novel fiber-optic multibeam Mach-Zehnder interferometer (m-MZI).
- To enable simultaneous measurement of torsion, strain, and temperature.
- To investigate the interference characteristics within a dual-core photonic crystal fiber.
Main Methods:
- Fabrication of an m-MZI using a section of photonic crystal fiber with two independent cores.
- Characterization of the fiber's distinct construction and birefringence properties.
- Analysis of inter-modal and inter-core interference effects under varying polarization states.
- Application of a three-beam interference model to the output spectrum.
Main Results:
- The m-MZI demonstrated simultaneous sensing of torsion, strain, and temperature.
- Distinct sensitivities to each parameter were observed for different polarizations.
- Inter-modal interference in the small core and inter-core interference were present.
- Polarization-dependent output spectra were analyzed using a three-beam interference model.
Conclusions:
- The proposed fiber-optic m-MZI is effective for simultaneous multi-parameter sensing.
- The device leverages dual-core photonic crystal fiber for unique interference phenomena.
- Matrix coefficients were proposed for accurate decoupling of torsion, strain, and temperature measurements.
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