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Synthesis and Operation of Fluorescent-core Microcavities for Refractometric Sensing
Published on: March 13, 2013
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Fiber SPR refractive index sensor with the variable core refractive index.
Applied Optics
|April 1, 2020
Summary
This study introduces a novel refractive index sensor using a special fiber with a controllable core. This innovation enables precise detection of high refractive index solutions, advancing sensor technology.
Area of Science:
- Photonics and Optical Sensing
- Materials Science
- Analytical Chemistry
Background:
- Refractive index sensors are crucial for various applications.
- Existing sensors face limitations in detecting high refractive index solutions.
- Surface Plasmon Resonance (SPR) offers high sensitivity but requires precise control.
Purpose of the Study:
- To propose and fabricate a novel refractive index sensor with a controllable core.
- To demonstrate a tunable detecting range for refractive index measurements.
- To provide a new method for detecting high refractive index solutions.
Main Methods:
- Fabrication of a special fiber with a variable core refractive index using ultraviolet curable adhesive and hollow capillary fiber.
- Development of a refractive index surface plasmon resonance (SPR) sensor.
- Functional testing and theoretical calculation using the Kretchmann model.
Main Results:
- Sensitivities of 1580 nm/RIU, 2220 nm/RIU, and 3467 nm/RIU were achieved with core refractive indices of 1.590, 1.516, and 1.454, respectively.
- Detecting ranges of 1.385-1.435 RIU, 1.365-1.415 RIU, and 1.335-1.385 RIU were demonstrated.
- Increased core refractive index led to an increased detectable refractive index magnitude.
Conclusions:
- A novel SPR sensor with a controllable detecting range was successfully realized.
- The proposed method offers a new approach for detecting high refractive index solutions.
- This work provides insights for fabricating wavelength-division multiplexing distributed SPR sensors.
