abstract:In physics, coherent backscattering is observed when coherent radiation (such as a laser beam) propagates through a medium which has a large number of scattering centers (such as milk or a thick cloud) of size comparable to the wavelength of the radiation.
The coherentnoise of single modefiber is restrained by theamplificationeffect of anti Stokes Ramanbackscattering, and the signalnoise ratio of sensor system is improved.