Research on coherent Rayleigh backscattering and signal processing method in phase-OTDR

Fiber Monitoring Technique With Sub-Carrier Baseband Tone Sweep

“…Other approaches studied include polarization control [47] and phase measurements [48,49] or both [50] to acquire an accurate reflectometry trace of the device under test. Some study has also been dedicated to other domain solutions such as Optical Wavelet Domain Reflectometry (OWDR) [51].…”