Abstract

A new technique for measuring the refractive index profile of single-mode fibers based on the reflection method is described, and experimental results are demonstrated. When the core radius of a test fiber is only a few times larger than the laser beam spot size, the reflected power distribution does not indicate the refractive index correctly. However, the true index profile can be calculated from the beam spot size and the reflected power distribution with high accuracy: 0.3-μm spatial resolution and 5% relative refractive-index resolution are obtained for practical single-mode fibers.

© 1978 Optical Society of America

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)

Spot size of graded-index single-mode fibers: profile-independent representation and new determination method

Ernst Brinkmeyer
Appl. Opt. 18(6) 932-937 (1979)

Automatic refractive-index profiling of optical fibers

H. M. Presby, D. Marcuse, and H. W. Astle
Appl. Opt. 17(14) 2209-2214 (1978)

Normalization of single-mode fibers having an arbitrary index profile

H. Matsumura and T. Suganuma
Appl. Opt. 19(18) 3151-3158 (1980)

Refractive-index profiling of preform rods by a photoelastic method: application to VAD single-mode fiber preforms

N. Shibata, Masao Kawachi, and Takao Edahiro
Appl. Opt. 21(19) 3507-3510 (1982)