Title :
Analysis and design of a narrowband all-fiber spectral filter made of step-index and W-type fibers
Author :
Safaai-Jazi, A. ; Chung, C.J.
Author_Institution :
Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
An all-fiber spectral filter constructed with step-index and W -type fibers is proposed. A coupled-mode theory based on the interaction of evanescent fields is used to analyze the transfer of power between the two fibers. The proposed filter offers a narrow spectral width on the order of few nanometers. The narrow bandwidth is achieved by exploiting a relatively large slope difference between the dispersion characteristics of the step-index and W fibers. Transmission characteristics are plotted against wavelength. The influence of various fiber parameters as well as fiber separation and coupling length on the spectral response is discussed. The application of the filter in wavelength-division multiplexing is addressed
Keywords :
fibre optics; optical fibres; optical filters; W-type fibers; coupled-mode theory; coupling length; dispersion characteristics; evanescent fields; fiber parameters; fiber separation; narrowband all-fiber spectral filter; optical fibres; slope difference; spectral response; spectral width; step-index; transfer of power; transmission characteristics; wavelength-division multiplexing; High speed optical techniques; Narrowband; Optical crosstalk; Optical fiber communication; Optical fiber couplers; Optical fiber devices; Optical fiber filters; Optical fiber theory; Optical filters; Wavelength division multiplexing;
Conference_Titel :
Southeastcon '89. Proceedings. Energy and Information Technologies in the Southeast., IEEE
Conference_Location :
Columbia, SC
DOI :
10.1109/SECON.1989.132612
