A new nondestructive method for determination of the outer diameter of optical fibers is described. The principle of this technique is based on observing interference maxima in the scattered light from a fiber that is side illuminated by a laser beam at oblique incidence. This technique is easy to implement and can be applied to a fiber with an inhomogeneous and large core.
© 1994 Optical Society of America
Erna Frins, Horacio Failache, José Ferrari, Germán Da Costa, and Arturo Lezama, "Optical-fiber diameter determination by scattering at oblique incidence," Appl. Opt. 33, 7472-7476 (1994)