新型渐变折射率低损耗大角度Y分支器的研究

针对集成光学中普通Y分支波导分支角度小,不利于集成的问题,提出了一种新型基于渐变折射率波导的低损耗大角度Y分支结构,经过理论分析和大量的有限差分光束传播法仿真,结果表明在分支角度为10°时辐射损耗为0.176 dB,与传统Y分支相比,新型Y分支器具有损耗小,结构简单的特点。

Research on Novel Low-Loss Wide Angle Y Branches of Graded-Index Waveguides

A new low-loss wide-angle Y branches is proposed based on the graded-index waveguides in this paper. The Results of theoretical analysis and the simulations by finite-difference beam propagation method (FDBPM) show that the radiation losses can be less than 0.18 dB even if a branching angle is as large as 10°. Compared with traditional Y branches, the new Y branches is characteristic with low losses and simple structure.