Fabrication Tolerant Integrated Polarization Rotator Design Using the Jones Calculus
Fabrication Tolerant Integrated Polarization Rotator Design Using the Jones Calculus
复制标题
使用琼斯微积分的制造容差集成偏振旋转器设计
DOI：
10.1109/jlt.2019.2910931
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发表时间：
2019
影响因子：
4.7
通讯作者：
M. Schell
中科院分区：
文献类型：
--
作者：
M. Baier;F. Soares;Tom Gärtner;M. Moehrle;M. Schell
一个制造宽容的偏振旋转器（PR）的构建块添加到我们的通用光子集成技术。使用非对称波导，我们提出了一种PR，其导模不与衬底成45°角。相反，我们发现，偏振性能和损耗可以通过允许模式角沿器件沿着变化而得到显著改善。我们在数值上优化PR设计，以高消光和高制造公差为目标。优化利用琼斯形式主义和琼斯微积分在数值上比光束传播方法快得多的事实。我们的琼斯模型和商业模拟软件的比较显示出良好的协议。制造的设备显示出10和14分贝之间的偏振消光在不同的晶圆，在1分贝的额外损失。与没有锥形的PR设计相比，损耗低3 dB，并且偏振消光现在可以从晶圆到晶圆再现。
A fabrication tolerant polarization rotator (PR) building block is added to our generic photonic integration technology. Using asymmetric waveguides, we propose a PR with guided modes that do not enclose a 45° angle with the substrate. Rather, we find that polarization performance and loss can be improved substantially by allowing the mode angles to vary along the device. We numerically optimize PR designs, targeting at high extinction and high fabrication tolerance. The optimization makes use of the Jones formalism and the fact that Jones calculus is numerically much faster than beam propagation methods. A comparison of our Jones model and commercial simulation software shows excellent agreement. Fabricated devices show a polarization extinction between 10 and 14 dB across different wafers, at an excess loss of 1 dB. Compared to PR designs without tapers, the loss is 3 dB lower and the polarization extinction is now reproducible from wafer to wafer.