Analysis of fiber grating filters written in fiber coupler by employing the unified coupled-mode theory

作者：Jiang Weiwei^*; Li Jian; Zhao Ruifeng; Wei Yan; Dong Xiaowei; Pei Li; Jian Shuisheng

来源：Acta Optica Sinica, 2010, 30(3): 644-649.

DOI：10.3788/AOS20103003.0644

• Broyden
• Channel efficiency
• Coupled mode equation
• Coupled-mode theory
• Evanescent-field coupling
• Fiber gratings
• Fiber-grating filters
• Grating-assisted couplers
• In-fiber
• Optimizing parameters
• Physical meanings
• Response characteristic

By introducing the grating refractive modulation into the evanescent field coupling, the unified coupled-mode equation for all kinds of fiber grating filters written in fiber coupler is obtained, which parameters have specific physical meaning. The filtering response of three kinds of fiber grating filters written in fiber coupler are analyed by numerical methed of Broyden and shooting. The influences of relative parameters on the filtering response characteristics are investigated theoretically. Drop channel efficiency of 95%, 85% and 99% can be obtained for grating assisted coupler, grating reflection coupler and grating frustrate coupler by optimizing parameters. Grating assisted coupler and grating reflection coupler are fabricated with reflectivity 15 and 18 dB.

• 出版日期2010
• 单位北京交通大学