Selective coupling of fiber modes with use of surface-guided Bloch modes supported by dielectric multilayer stacks
Selective coupling of fiber modes with use of surface-guided Bloch modes supported by dielectric multilayer stacks
复制标题
使用介电多层堆叠支持的表面引导布洛赫模式选择性耦合光纤模式
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
F. D. Lloyd
中科院分区：
文献类型：
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作者：
R. Pechstedt;P. Russell;T. Birks;F. D. Lloyd
由多层电介质叠层和外部介质之间的界面引导的表面引导布洛赫模式具有高度色散性。这使得它们在光进出侧抛光多模光纤的模式选择性耦合中具有吸引力。对双模光纤的特殊情况进行了建模。发现与通过与叠层具有相同平均折射率的单模波导膜进行选择相比，通过表面引导布洛赫模式进行模式选择具有优势。良好的模态选择性和高可调性是可以实现的，即对叠层和侧面抛光光纤之间的中间层的折射率具有高灵敏度。
The surface-guided Bloch modes guided by the interface between a multilayer dielectric stack and an external medium are highly dispersive. This makes attractive their use in mode-selective coupling of light into and out of side-polished multimode fibers. The particular case of a dual-mode fiber is modeled. Mode selection by means of surface-guided Bloch modes is found to offer advantages in comparison with selection by means of a single-mode waveguiding film of the same average refractive index as the stack. Good modal selectivity is achievable together with high tunability, i.e., high sensitivity to the refractive index of the intervening layer between stack and side-polished fiber.