量子电子学报, 2004, 21 (1): 68, 网络出版: 2006-05-15
不同分束比熔锥型光纤宽带耦合器特性研究
Study on Different Splitting Ratio Characteristic of Wavelength-flattened Fused-taper Fiber Couplers
纤维与波导光学 分束比 宽带 耦合器 fiber and waveguide optics splitting ratio wavelength-flattened fused-taper fiber coupler
摘要
在弱导和弱耦合近似下,对熔锥型非对称耦合器进行了理论计算与分析,理论分析表明:这种非对称耦合器具有波长响应平坦的特性,而且非对称程度的大小直接影响耦合器输出功率的分配(即分束比);通过在拉锥过程中控制组合波导的不同直径比,可以得到不同分束比的宽带耦合器.对分束比为50%的耦合器进行了性能测试,实验结果与理论分析相吻合.
Abstract
The asymmetrical fused-taper coupler is studied theoretically with weakly guiding and weakly coupling approximation in this paper, the analysis reveals that this kind of couplers have wavelength-flattened characteristics, and the degree of asymmetry can affect the splitting ratio directly. A wavelength-flattened coupler with different splitting ratio can be obtained by controlling the diameter ratio of two coupled arms in the process of fabrication. With 50% splitting ratio, the theoretical results agree with the experimental data.
林小莉, 李平, 王强, 马宝民. 不同分束比熔锥型光纤宽带耦合器特性研究[J]. 量子电子学报, 2004, 21(1): 68. 林小莉, 李平, 王强, 马宝民. Study on Different Splitting Ratio Characteristic of Wavelength-flattened Fused-taper Fiber Couplers[J]. Chinese Journal of Quantum Electronics, 2004, 21(1): 68.
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