摘要
和直波导的不同在于 ,三维楔脊形波导中的光场都是不稳定的 .分别对波导_光纤耦合、光纤_波导耦合两种情况 ,将三维楔脊形波导等效为多段短的直波导 ,利用束传播法同时对三维楔脊形波导内不稳定的入射、反射场 ,及它们在传播方向上的偏导进行处理 ,再用自由空间辐射模法计算透射率和反射率 .以SOI楔脊形波导和光纤的耦合为例 。
The fields in 3-dimensional tapered waveguides are unstable compared with the fields in the straight waveguides. In the case of waveguide-to-fiber coupling and fiber-to-waveguide coupling, a sequence of short straight waveguides has been modeled to approximate the 3-dimensional tapered waveguide; and the unstable incident and reflected fields, as well as their derivatives, were determined by the beam propagation method(BPM). Then free space radiation mode(FSRM) was employed to calculate the reflected and transmitted powers. Analysis results of the coupling of fiber with silicon-on-insulator(SOI) tapered rib waveguides showed the feasibility of the method.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第1期6-11,共6页
Acta Physica Sinica
基金
国家高技术研究发展计划 (批准号:2 0 0 2AA3 12 0 60 )
国家重点基础研究发展计划(批准号 :G2 0 0 0 0 3 66)资助的课题~~
