Rayleigh scattering optical frequency correlation in a single-mode opticalfiber

The bichromatic optical frequency correlation function for Rayleigh backsca ttering from a pulse of laser light propagating along a single-mode optical fiber has been calculated and measured. It is shown that the optical corre lation frequency, Deltav(c), is equal to the reciprocal of pulse width tau (w). These results are important for the development of wavelength diversit y techniques for the reduction of coherent Rayleigh noise in distributed Ra yleigh backscattering single-mode optical fiber sensors.