分散性光ファイバと波長依存性のないカプラへの応用

概要

論文の詳細を見る
Optical fiber devices will be important in-line components of optical communications and optical measurements. In conventional optical fibers comprising optical devides, the refractive-index difference between the core and cladding glassed is almost constant against wavelength. Therefore realizable functions of optical fiber devices using typical fibers are limited by their resembling spectral characteristics. Optical fibers whose index difference changes greatly with wavelength are proposed, theoretically to make several kinds of fiber devices, and are called dispersive fibers. Dispersive fibers whose refractive-index spectra cross each other have been fabricated. It is shown that spectral characteristics of the dispersive fibers can be changed greatly by annealing. In this paper, a dispersive fiber is annealed and changed into a single-mode fiber. The annealed fiber supports the fundamental rnode over a broad spectral range and no second guides mode. Wavelength-insensitive fiber couplers are fabricated from the annealed dispersive fiber by mechanical polishing.
社団法人電子情報通信学会の論文
1997-03-06