研究目的
To classify the factors causing the change of the optical fiber strain by using the Brillouin reflectograms, focusing on temperature and mechanical longitudinal stretching impacts.
研究成果
The study enables the identification of the predominant factor affecting optical fiber strain in fiber optical communication lines through the analysis of Brillouin multi-reflectograms. This improves the efficiency of early diagnostics of potentially hazardous sections in optical fibers.
研究不足
The study is limited by the uncertainty in identifying the factors causing change in fB due to its dependence on both longitudinal strain and temperature of the optical fiber. Additionally, the accuracy of tests and temperature stability are challenges in the temperature range from +50°C to +90°C.
1：Experimental Design and Method Selection:
The study analyzes the differences in Brillouin reflectograms under various impacts (temperature and mechanical longitudinal stretching) to classify factors affecting optical fiber strain.
2：Sample Selection and Data Sources:
Different kinds of optical fibers from a database are used to improve the classification process of potentially hazardous sections.
3：List of Experimental Equipment and Materials:
Brillouin optical time-domain reflectometers (BOTDRs) are used for early diagnostics of optical fibers.
4：Experimental Procedures and Operational Workflow:
The study involves probing the optical fiber by short pulses to determine the distribution of Mandelstam – Brillouin backscatter spectrum (MBBS) along the optical waveguide.
5：Data Analysis Methods:
The analysis includes determining the Brillouin frequency shift (fB) and the intensity of the backscattered signal to identify the predominant factor affecting fiber strain.
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