Fiber chromatic dispersion measurement by using a novel RF spectrum phase detection method based on DSP

In this paper, a novel chromatic dispersion (CD) measuring method based on a novel RF spectrum phase detection technique is proposed, this is performed using in-band tone monitoring RF, electrically down-converted to direct current (DC) or a low intermediate-frequency (IF) of less than 1 MHz through electronic mixing with local oscillator (LO). We theoretically and experimentally demonstrated the CD measurement for CD components (etc. fiber). The method can support any CD range measuring with good accuracy through adjusting RF frequency.