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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
Published on: November 7, 2016
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Temperature sensing in seawater based on microfiber knot resonator.
Hongjuan Yang1, Shanshan Wang2, Xin Wang3
1Department of Physics, College of Information Science and Engineering, Ocean University of China, Qingdao 266100, China. yanghongjuan1989@gmail.com.
Sensors (Basel, Switzerland)
|October 10, 2014
Summary
A novel microfiber knot resonator (MKR) sensor accurately measures seawater temperature, crucial for detecting ocean internal-wave phenomena. This high-sensitivity optical sensor offers advantages for oceanographic research.
Area of Science:
- Optoelectronics
- Oceanography
- Sensor Technology
Background:
- Ocean internal-wave phenomena are linked to variations in seawater vertical temperature.
- Accurate measurement of seawater temperature is vital for detecting and studying internal waves.
- Existing detection methods often rely on direct temperature measurements.
Purpose of the Study:
- To design and experimentally demonstrate a novel seawater temperature sensor.
- To investigate the sensing sensitivity of the microfiber knot resonator (MKR) sensor.
- To explore the sensor's potential for ocean internal-wave detection.
Main Methods:
- Theoretical design and experimental demonstration of a microfiber knot resonator (MKR) based temperature sensor.
- Systematic study of the dependence of sensing sensitivity on microfiber diameter and probing wavelength.
- Experimental validation of theoretical calculations.
Main Results:
- Sensing sensitivity increases with microfiber diameter (2.30-3.91 μm) and probing wavelength.
- Maximum measured sensitivity reached 22.81 pm/°C.
- Experimental results showed good agreement with theoretical calculations.
Conclusions:
- The developed MKR sensor offers high sensitivity and small size for seawater temperature detection.
- This optical sensor provides a new method for monitoring ocean internal-wave phenomena.
- The sensor design offers a valuable reference for micro-sensors measuring other seawater parameters.
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