An incoherent, frequency modulated continuous wave optical reflectomer is described which utilizes a broadband LiNbO3 electrooptic modulator and slow photodiode for optical downconversion and detection, and a waveform recorder for digital spectrum analysis of the incoming signal. A two-point resolution of 6.8 cm in fiber is achieved. The dynamic range, defined as the location of the system noise floor relative to the maximum producible signal, is 50-dB optical.
© 1990 Optical Society of America
Original Manuscript: July 10, 1989
Published: March 20, 1990
Shalini Venkatesh and David W. Dolfi, "Incoherent frequency modulated cw optical reflectometry with centimeter resolution," Appl. Opt. 29, 1323-1326 (1990)