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Fiber optic refractometric sensors using a semi-ellipsoidal sensing element.
Applied Optics
|May 4, 2016
Summary
A new fiber optic sensor uses a semi-ellipsoidal element for precise refractive index measurements. This cost-effective refractometric sensor offers high sensitivity across a broad refractive index range.
Area of Science:
- Optoelectronics
- Photonics
- Chemical Sensing
Background:
- Refractive index sensing is crucial for various applications.
- Existing refractometric sensors can be complex and expensive.
- Optical fiber sensors offer potential for miniaturization and remote sensing.
Purpose of the Study:
- To develop and characterize a novel fiber optic refractometric sensor.
- To investigate the sensing mechanism based on double internal reflection.
- To compare the performance of the developed sensor with existing technologies.
Main Methods:
- Theoretical modeling and experimental validation of the sensor.
- Utilizing a semi-ellipsoidal sensing element made of polymethyl methacrylate.
- Employing double internal reflection of light within the sensing element.
Main Results:
- The sensor operates at a wavelength of 632 nm.
- Achieved a wide measurement range of refractive indices from n=1.00 to n=1.47.
- Demonstrated high sensitivity exceeding 500 dB/RIU.
Conclusions:
- The developed fiber optic refractometric sensor is effective for a wide range of refractive index measurements.
- The sensor design offers a simpler and potentially more cost-effective alternative to complex refractometric sensors.
- The theoretical and experimental results validate the sensor's performance and potential for practical applications.
