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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
Published on: November 7, 2016
Temperature-insensitive bend sensor using entirely centered Erbium doping in the fiber core
Harith Ahmad1, Mohd Zamani Zulkifli, Farah Diana Muhammad
1Photonics Research Centre, University of Malaya, 50603 Kuala Lumpur, Malaysia. harith@um.edu.my
Sensors (Basel, Switzerland)
|July 25, 2013
Summary
A novel Bend-Sensitive Erbium Doped Fiber (BSEDF) sensor demonstrates accurate bend detection. This fiber optic sensor shows stable performance and low temperature sensitivity, ideal for precise measurement applications.
Area of Science:
- Optoelectronics
- Fiber Optics
- Sensor Technology
Background:
- Bend sensors are crucial for various monitoring applications.
- Existing fiber optic sensors face challenges in stability and sensitivity.
- Erbium-doped fibers offer unique optical properties for sensing.
Purpose of the Study:
- To propose and demonstrate a novel fiber-based bend sensor.
- To investigate the performance characteristics of the Bend-Sensitive Erbium Doped Fiber (BSEDF).
- To assess the sensor's stability and temperature sensitivity.
Main Methods:
- Fabrication of a dual-core BSEDF with specific dopant concentration and dimensions.
- Characterization of the Amplified Spontaneous Emission (ASE) spectrum under varying spooling conditions.
- Evaluation of output power stability and temperature sensitivity.
Main Results:
- The BSEDF produced an ASE spectrum from 1,510 nm to over 1,560 nm when pumped with a 980 nm laser.
- Peak power decreased from -52 dBm to -61.8 dBm as spooling diameter reduced from unspooled to 2 cm.
- The sensor exhibited high stability and low temperature sensitivity (~0.005 dBm/°C).
Conclusions:
- The proposed BSEDF is effective for bend sensing.
- The sensor's performance is stable over time and across temperatures.
- This technology enables the development of highly reliable fiber optic sensing systems.
