Abstract

The utility of an auxiliary fiber, called a dummy fiber, is investigated for optical fiber loss measurements. The dummy fiber is spliced and used to excite the test fiber. Excess loss caused by undesirable modes is found to be reduced to less than 0.05 dB by using a 500-m dummy fiber and choosing the test fiber cut length to be 2 m for reference. Loss linearity to the fiber length is examined on 6-km spliced fibers, and satisfactory agreement is obtained between the total loss and the sum of the individual fiber and splice losses.

© 1979 Optical Society of America

Wavelength dependence of spliced graded-index multimode fibers

T. Matsumoto and K. Nakagawa
Appl. Opt. 18(9) 1449-1454 (1979)

Diameter determination of graded-index optical fibers from backward-scattered pattern

Charoon Saekeang and Pak L. Chu
Appl. Opt. 18(19) 3276-3281 (1979)

Transfer function of long spliced graded-index fibers with mode scramblers

Masahiro Ikeda and Kenichi Kitayama
Appl. Opt. 17(1) 63-67 (1978)

Shuttle pulse measurements of pulse spreading in a low loss graded-index fiber

L. G. Cohen and H. M. Presby
Appl. Opt. 14(6) 1361-1363 (1975)

Determination of modal power distribution in graded-index optical waveguides from near-field patterns and its application to differential mode attenuation measurement

Y. Daido, E. Miyauchi, T. Iwama, and T. Otsuka
Appl. Opt. 18(13) 2207-2213 (1979)