How OTDR calculate the optical length? :  Perhaps this is a very important question because we all know that OTDR is the only device that shows optical length, but how OTDR calculates optical length , we rarely consider this matter. As we know OTDR …

Principles Of an OTDR: OTDR , the full name of which is "Optical Time Domain Reflectometer" . The OTDR depends on two types of optical phenomena: Rayleigh Backscattering and Fresnel Reflections: 1.Rayleigh scattering is intrinsic to the…