Theoretical and experimental study on performance degeneration of fiber bragg grating

Jun Wu; Weimin Chen; Peng Zhang; Li Liu

doi:10.1117/12.837863

23 November 2009 Theoretical and experimental study on performance degeneration of fiber bragg grating

Jun Wu, Weimin Chen, Peng Zhang, Li Liu

Proceedings Volume 7508, 2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications; 750808 (2009) https://doi.org/10.1117/12.837863
Event: International Conference on Optical Instrumentation and Technology, 2009, Shanghai, China

Abstract

Performance degeneration of FBG directly affects the long-term stable work of the whole FBG sensing network. According to the formula of FBG refelectd spectrum,the impacts of refraction index modulation depth Δn on refelectd spectrum peak and zero bandwidth are deeply analysed. Based on the theoretical analysis of energy level transition theory, we can find that the temperature shock can make electrons in traps which is of certain distribution of energy overflow,and then cause the reduction of modulation depth Δn , and eventually lead to the performance degeneration of FBG. Conducted the high-low temperature cycling degenerate experiment of FBGs, experimental results show temperature cycling alternate shock will produce accelerated aging phenomenon:after 1000 alternating cycles, the reflection spectrum is almost difficult to identify, the sensing ability is basically lost. Test results prove the correctness of theoretical analysis.

Citation Download Citation

Jun Wu, Weimin Chen, Peng Zhang, and Li Liu "Theoretical and experimental study on performance degeneration of fiber bragg grating", Proc. SPIE 7508, 2009 International Conference on Optical Instruments and Technology: Advanced Sensor Technologies and Applications, 750808 (23 November 2009); https://doi.org/10.1117/12.837863

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