研究目的
To analyze the operating principle and accuracy characteristics of OFDR re?ectometers, propose calibration methods, and estimate the instrument accuracy quantitatively.
研究成果
The study provides a mathematical model for OFDR re?ectometers, estimates their accuracy characteristics, and proposes calibration methods. The results will contribute to the creation of new measurement means and a metrological base for optical re?ectometry.
研究不足
The calibration methods proposed may not be feasible for periodic testing and calibration of instruments under the conditions of a metrology laboratory due to the need for access to the components of the OFDR re?ectometer during manufacture.
1：Experimental Design and Method Selection:
The study examines the operating principle of OFDR re?ectometers and presents a mathematical model for measuring the parameters of ?ber-optic systems.
2：Sample Selection and Data Sources:
The analysis is based on the conceptual diagram of an OFDR re?ectometer and the mathematical model developed.
3：List of Experimental Equipment and Materials:
Includes tunable laser (TL), main and auxiliary interferometers (MI and AI), splitters (S1–S5), circulator (C), polarization controller (PC), photodetector (PD), ?ber to be tested (FT), data analysis and acquisition system (DAAS), gas-?lled cell (GC), and polarization splitter (PS).
4：Experimental Procedures and Operational Workflow:
The light from the TL is split and directed into the main and auxiliary interferometers. The main interferometer measures the backscatter and re?ection from inhomogeneities in the test ?ber.
5：Data Analysis Methods:
The signals from the photodetectors are analyzed using the mathematical model to determine the position of inhomogeneities in the test ?ber.
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