Low birefringence depressed cladding photosensitive fiber

• 来源期刊: 中国光学快报(英文版)
• 学科: 工学
• 关键词: 双折射光纤 光敏纤维 光纤布拉格光栅 熔覆 模耦合特性 传输功能 通信应用 光纤光栅
• 年，卷（期）: 2010,（1）
• 所属期刊栏目: Fiber Optics and Optical Communications
• 页码范围: 4-6
• 页数: 3页
• 分类号: TN253 TQ342.8
• 语种: 英文

摘要

The highly Ge-doped photosensitive fiber(PSF) has been widely used in the fabrication of fiber Bragg gratings(FBGs).Its birefringence and cladding mode coupling characteristics greatly influence FBG''s transmission feature in communication application areas.In this work,a new concept of the PSF is introduced which,along with an optimized birefringence design,a precisely controlled fabrication process, and a cladding mode depressed design,results in a written FBG with - 25-dB clad mode-depressed ratio and ...