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Writing Bragg Gratings in Multicore Fibers
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High-temperature stable and sterilizable waveguide Bragg grating in planar cyclo-olefin copolymer
Optics Letters
|July 14, 2018
Summary
This study presents a high-temperature stable polymer waveguide Bragg grating for precise temperature sensing up to 160°C. The cyclo-olefin copolymer device maintains performance and recovers after sterilization.
Area of Science:
- Optoelectronics
- Materials Science
Background:
- Polymer-based optical sensors offer advantages in cost and flexibility.
- High-temperature applications require materials with excellent thermal stability.
Purpose of the Study:
- To develop and characterize a high-temperature stable polymer planar waveguide Bragg grating.
- To evaluate the sensor's performance and stability at elevated temperatures.
Main Methods:
- Fabrication of a polymer planar waveguide Bragg grating using cyclo-olefin copolymers.
- Integration with single-mode fiber using a high-temperature stable UV-curable adhesive.
- Temperature testing and characterization of Bragg wavelength and reflected power.
Main Results:
- The polymer waveguide Bragg grating demonstrated stable temperature readings up to 160°C.
- The sensor exhibited a temperature sensitivity of -7.3 pm/°C.
- Reflected power remained constant up to 130°C and recovered fully after steam sterilization.
Conclusions:
- Cyclo-olefin copolymers enable high-temperature stable polymer waveguide Bragg gratings.
- The developed sensor is suitable for high-temperature sensing and sterilization processes.
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