新型大角度低损耗Y分支在集成光器件中的应用

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上传日期: 2009-03-08

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标签:损耗(7)

介绍了一种新型低损耗大角度Y分支器的基本原理,并把这种新型结构应用于1×4光分路器和M-Z调制器中,然后利用FDBPM方法进行了仿真,结果表明1×4光分路器在长度大大减小的同时,实现了只有0.32 dB的低损耗;当分支角度等于14.3°时,M-Z调制器实现了干涉相消。与普通结构的器件相比,应用新型低损耗大角度Y分支器的光分路器和M-Z调制器具有损耗低、尺寸小等优点。
关 键 词 光分路器; 光调制器; Y分支; 集成光学; 有限差分光束传播法

Abstract In this paper,A new low-loss wide-angle Y-JuncTIon with graded-index opTIcal waveguides, which can change the opTIcal propagaTIon direction, is introduced. An application of the Y-junction structure to 1×4 optical splitter and Mach-Zehnder modulator is analyzed. The two kinds of device performance are examined numerically by the finite difference beam propagation method (FDBPM). The simulated results show that the 1×4 optical splitter has very low loss of 0.32 dB but its optical waveguide length can largely be shortened, and that the M-Z modulator can reach a counteraction of the coherence light when the branching angle is 14.3°. Comparing with common devices, optical splitter and M-Z modulator with low-loss wide-angle Y-Junction have both low loss and small dimension.
Key words optical splitter; M-Z modulator; Y-Junction; integrated optics; FDBPM

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