In this paper the results of fused biconical-taper (FBT) couplers fabricated with dispersion-shifted fibers are presented. Couplers fabricated by the FBT process possess inherent design advantages of low loss, low cost, and environmental and temperature stability. With the increasing use of dispersion-shifted fiber in long, repeaterless transmission systems, couplers using these fibers are required. The optical and environmental performance of couplers made from four different dispersion-modified fiber profiles is examined.
Robert G. Files,
"Fused Biconical-Taper Couplers Using Dispersion-Shifted Fiber", Proc. SPIE 1176, Components for Fiber Optic Applications IV, (5 February 1990); doi: 10.1117/12.963294; https://doi.org/10.1117/12.963294