上海交通大学学报

上海交通大学学报（自然版） ›› 2014, Vol. 48 ›› Issue (10): 1406-1409.

• 无线电电子学、电信技术 • 上一篇    下一篇

高灵敏马赫泽德环形谐振腔

陈曜1，2，何鹏程1，卜天容1，丁玉丽1，韦以明1   

  1. (1. 广西大学物理工程与技术学院，广西壮族自治区 南宁 530004；  2. 广州民航职业技术学院，广东 广州 510000)
  • 收稿日期:2014-03-28 出版日期:2014-10-28 发布日期:2014-10-28
  • 基金资助:

    北京大学“区域光纤通信网与新型光通信系统国家重点实验室” 开放基金(2012GZKF031214)资助,广西壮族自治区自然科学基金（2012GXNSFBA053164）

Highly Sensitive Mach-Zehnder Ring Resonator

CHEN Yao1,2，HE Pengcheng1，BU Tianrong1，DING Yuli1，WEI Yiming1   

  1. (1. College of Physical Science and Technology, Guangxi University, Nanning 530004, China;2. Guangzhou Civilaviation College, Guangzhou 510000, China)
  • Received:2014-03-28 Online:2014-10-28 Published:2014-10-28

摘要：

 提出并分析了带反馈的马赫泽德新颖环形谐振腔结构.基于耦合模理论及传输矩阵，采用光强随有效折射率变化的方法对该结构进行分析，并通过优化结构参数，得出其具有陡峭的反对称法诺输出谱线.与传统的微环传感相比，法诺谐振的输出谱线更加尖锐，因此具有更低的探测极限.在信噪比为30dB的测量系统中，其探测极限达到10-9，比已报道的10-8降低了1个数量级.

关键词: 传感器, 灵敏度, 法诺谱线, 探测极限, 洛伦兹谱线

Abstract:

This paper proposed and analyzed a novel ring resonator structure with feedback Mach Zehnder based on the coupled mode theory and transfer matrix, and using the method of normalized transmission  changing with the effective refractive index to analyze the structure. By optimizing the structure parameters  it was found that the proposed structure had a sharp steep  antisymmetric Fano output spectrum. Compared with the traditional microring resonator output curve line, i.e., the symmetry Lorentz spectrum, the output light intensity is more sensitive to  perceive the external environment change. Therefore, the structure has a higher sensitivity and lower detection limit. In the 30 dB signaltonoiseratio(SNR) measuring systems, the detection limit of the structure reaches 10-9 units of the refractive index, which is one order of magnitude lower than the reported 10-8 units of refractive index.

Key words: sensor, sensitivity, Fano spectrum, detection limit, Lorentz spectrum

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