Failure Detection Method for GaN-Based Dosimetric Systems

Pierrick Guiral; Jean Marc Galvan; Patrick Pittet; Ruo Xi Wang; Guo Neng Lu; Patrice Jalade; Denis Dauvergne

doi:10.4028/www.scientific.net/KEM.644.78

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 644Failure Detection Method for GaN-Based Dosimetric...

Failure Detection Method for GaN-Based Dosimetric Systems

Abstract:

We propose a failure detection method for GaN-based dosimetric systems, which basically consist of a GaN-incorporated optical fiber probe coupled to a photodetection module. The method consists in introducing UV excitation with a 285nm LED, and detecting the photoluminescence (PL) of the GaN transducer centered at 380nm. Spectral analysis of the detected signal allows verification of normal operation and identification of failure cases, due to problems of GaN-fiber coupling and poor fiber connection between probe and photodetection module. The proposed method is implemented and experimentally tested, including the use of a 660nm LED to illuminate the probe to verify the transmission ratio between probe and photodetection module. The validity of this method has been verified.

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Proceedings of the 4th International Conference on Materials and Applications for Sensors and Transducers

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Periodical:

Key Engineering Materials (Volume 644)

Pages:

78-82

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.644.78

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Online since:

May 2015

Authors:

Pierrick Guiral, Jean Marc Galvan, Patrick Pittet, Ruo Xi Wang, Guo Neng Lu, Patrice Jalade, Denis Dauvergne

Keywords:

Dosimetry, GaN Radioluminescent Transducer, Probe Failure Detection, UV Photoluminescence

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References

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