Fig. 1. Schematic diagram of the optical frequency domain measurement for polarization crosstalk of a polarization maintaining fiber. (a) Measurement principle; (b) time beat signal; (c) position and information of distributed polarization crosstalk

Fig. 2. Schematic diagram of distributed iterative dispersion compensation algorithm

Fig. 3. Optical path used to verify the presence of chrominance dispersion

Fig. 4. Comparison of results when the dispersion coefficient of the interferometer is inconsistent. (a) Display of different wiring modes when testing 500 m polarization-maintaining fiber; (b) detail display near the main peak

Fig. 5. Experimental device diagram of SR-OFDP

Fig. 6. Results of 9.5 km polarization-maintaining fiber before and after dispersion compensation of birefringent dispersion. (a) Overview of results before and after dispersion compensation; (b) display details at the location of 4120-4150 m; (c) display details at the location of 8120-8180 m; (d) display details at the location of 9420-9510 m

Fig. 7. Forward and backward test results with birefringent dispersion compensation. (a) An overview of the positive and negative measurement results; (b)(c) displays of local compensation results locations of (940-955 m and 9090-9105 m respectively)