Abstract

A nondestructive technique of determining the refractive index profile of an optical fiber is presented. This method involves collecting the pathlength data of rays passing through the fiber due to side-illumination and taking the fast Fourier transform of these data followed by a numerical integration. It is found that this technique yields results in good agreement with measurements from the near-field scanning technique. The advantage of the present method is that it can readily be extended to fibers of noncircular cross section.

© 1979 Optical Society of America

Nondestructive determination of refractive index profile of an optical fiber: backward light scattering method

Charoon Saekeang and Pak L. Chu
Appl. Opt. 18(7) 1110-1116 (1979)

Focusing method for nondestructive measurement of optical fiber index profiles

D. Marcuse and H. M. Presby
Appl. Opt. 18(1) 14-22 (1979)

Laser beam refraction traversely through a graded-index preform to determine refractive index ratio and gradient profile

L. S. Watkins
Appl. Opt. 18(13) 2214-2222 (1979)

Refractive index determination by the focusing method

D. Marcuse
Appl. Opt. 18(1) 9-13 (1979)

Refractive-index profiling of single-mode optical fibers and performs

Herman M. Presby, Dietrich Marcuse, and William G. French
Appl. Opt. 18(23) 4006-4011 (1979)