Fiber length and chromatic dispersion measurement technology using a novel optical frequency domain reflectometry

We have proposed and demonstrated a novel optical frequency domain reflectometry (OFDR) incorporating an electron-optic modulator (EOM) for fiber length and chromatic dispersion measurement. The fiber length and chromatic information can be obtained by analyzing the phase difference of two interference beams in frequency domain. Two reflection points with a distance of 7 m at the end of the fiber under test (FUT) 60 km away was well distinguished and the chromatic dispersion is successfully measured at C-band.