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CYTOP Fibre Bragg Grating Sensors for Harsh Radiation Environments.
Christian Broadway1, Damien Kinet2, Antreas Theodosiou3
1Telecommunications and Electromagnetism Department, University of Mons, Blvd Dolez 31, 7000 Mons, Belgium. Christian.Broadway@umons.ac.be.
Sensors (Basel, Switzerland)
|June 30, 2019
Summary
This study shows a polymer fiber Bragg grating sensor can detect gamma radiation dose. The sensor, inscribed in CYTOP fiber, offers a sensitive method for monitoring radiation in nuclear waste repositories.
Area of Science:
- Materials Science
- Optics and Photonics
- Radiation Physics
Background:
- Fiber Bragg gratings (FBGs) are crucial optical sensors.
- Understanding FBG response to ionizing radiation is vital for harsh environments.
- Perfluorinated CYTOP fibers offer unique properties for sensor applications.
Purpose of the Study:
- To investigate the sensitivity of a polymer fiber Bragg grating sensor to gamma radiation.
- To characterize the performance of femtosecond inscribed Bragg gratings in CYTOP fiber under irradiation.
- To assess the potential of this sensor for applications in nuclear waste repositories.
Main Methods:
- Femtosecond laser inscription of Bragg gratings within perfluorinated CYTOP fiber.
- Exposure of the FBG sensor to gamma radiation up to a total dose of 41 kGy.
- Monitoring the reflected spectral profile to observe changes in the Bragg wavelength.
Main Results:
- The polymer fiber Bragg grating sensor exhibited a measurable shift in Bragg wavelength with increasing gamma radiation dose.
- A linear sensitivity of -26.2 pm/kGy was determined.
- A resolution of 40 Gy was achieved, demonstrating high sensitivity.
Conclusions:
- Femtosecond inscribed Bragg gratings in CYTOP fiber are sensitive to gamma radiation.
- The characterized sensor performance supports its potential use in nuclear waste repository instrumentation.
- This research enhances understanding of gamma radiation effects on FBGs in CYTOP fibers.
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