Abstract

Stimulated Brillouin scattering (SBS) is the major limitation to increasing optical transmission distance, because SBS limits the transmission power of the fiber. A few papers have dealt with the relationship between SBS suppression and fiber cable.^1-3 For example, cascaded fibers with different Brillouin shifts have been proposed,¹ and tension control during fiber drawing can effectively control the Brillouin shift.² For these methods, the Brillouin gain bandwidth was constant and the improved SBS threshold was <4 dB. We proposed and examined a different method for further improvement.³ Major differences are (1) strain distribution is intentionally applied to fiber by cabling, (2) Brillouin gain bandwidth is expanded by applied short-pitch strain distribution. In this paper, we report characteristics of a newly developed cable with higher fiber strain.

© 1992 Optical Society of America