Phase-shifted Bragg-Grating filters with improved transmission characteristics

被引：118
|
作者：
Zengerle, R
Leminger, O
机构：
[1] Deutsche Telekom, Forschungs-und Technologiezentrum
来源：
JOURNAL OF LIGHTWAVE TECHNOLOGY | 1995年 / 13卷 / 12期
关键词：
D O I：
10.1109/50.475575
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Standard Bragg filters (dielectric waveguides with a grating overlay) show a stopband only in reflection. Filters with quarter-wave-shifted gratings have an extremely narrow transmission peak in the center of the stopband but its shape (a sharp triangle with a broad bottom) is not suitable for system design. Using standard coupled-mode theory together with transfer-matrix formalism, we show that by introducing several phase-shift regions and properly choosing their locations and magnitudes the transmission spectrum can be tailored into a nearly rectangular shape. For InP/InGaAsP-based Bragg-grating filters estimates are made of achievable channel spacings in wavelength-division multiplexing systems.
引用
收藏
页码：2354 / 2358
页数：5
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