实时双环谐振腔光谱包络拟合

赵凯浩; 李明宇; 王朝宇; 陈鑫; 关博仁; 何建军; 林初月; 董文飞

doi:10.37188/CO.2023-0195

实时双环谐振腔光谱包络拟合

doi: 10.37188/CO.2023-0195

1.
长春理工大学光电工程学院光学工程系, 吉林长春 130022
2.
浙江大学现代光学仪器国家重点实验室, 浙江杭州 310027
3.
浙江光尖电子技术有限公司, 浙江温州 325011
4.
中国科学院苏州生物医学工程研究所, 浙江苏州, 215163

基金项目: 国家自然科学基金项目（No. 62027825)；吉林省自然科学基金（No.20220101130JC）；高等学校学科创新引智计划（No. D21009）

详细信息

作者简介:
李明宇（1978—），男，吉林长春人，博士，教授，2006年于浙江大学光电信息工程学院获得博士学位，2006年至2017年浙江大学光电科学与工程学院副教授，2018年至今长春理工大学光电工程学院教授，目前主要从事集成光学方面的研究。E-mail：limingyu@cust.edu.cn

中图分类号: TN256
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- 被引次数: 0
出版历程
- 收稿日期: 2023-10-31
- 修回日期: 2023-11-24
- 网络出版日期: 2024-05-20

Envelope fitting for real-time cascaded microring resonator’s output spectrum

1.
Department of Optical Engineering, School of Opto-Electronic Engineering, Changchun University of Science and Technology, Changchun 130022, China
2.
State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China
3.
Zhejiang Lightip Electronics Technologies Co., Ltd., Wenzhou 325011, China
4.
Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science, Suzhou 215163, China

Funds: Supported by the National Natural Science Foundation of China (No. 62027825); Natural Science Foundation of Jilin Province (No. 20220101130JC); the 111 Project of China (No. D21009)

More Information

Corresponding author: limingyu@cust.edu.cn

摘要

摘要:
双环级联谐振腔(Cascaded Microring Resonators, CMRR)传感器作为一种新型的光学传感器，因具有高灵敏度、易于集成、功耗小等优点被广泛应用于生物、医学等领域。为了实现CMRR传感器输出光谱的实时数据分析处理，提出了一种基于Python的实时CMRR传感器输出光谱包络拟合方法。首先，利用不同的拟合模型对CMRR传感器输出光谱进行拟合；然后，通过灵敏度误差百分比对不同拟合模型的拟合误差进行比较，结果显示平滑样条拟合法在实时处理CMRR传感器输出光谱过程中表现最佳；最后对不同浓度的NaCl溶液进行实时输出光谱采集处理，验证了CMRR传感器输出光谱实时采集处理程序的可靠性。实验结果表明CMRR传感器的波长漂移量与溶液浓度呈线性关系。通过计算可知CMRR传感器对于盐水的灵敏度约为671.03529 nm/RIU。
- 集成光学 /
- 双环级联谐振腔 /
- 包络拟合 /
- 折射率 /
- 光学谐振腔
Abstract:
Cascaded Microring Resonators (CMRR), a new type of optical sensor, are widely used in biology, medicine, and other fields because of their high sensitivity, easy integration, and low power consumption. In this paper, we propose a Python-based envelope fitting method for real-time CMRR sensor’s output spectrum to achieve real-time data analysis and processing of the CMRR sensor’s output spectrum. First, different fitting models were used to fit the output spectrum of the CMRR sensor. Then, the fitting errors of different fitting models were compared by sensitivity error percentage, and it was concluded that the smooth spline fitting method performed best in real-time processing of the output spectrum of the CMRR sensor. Finally, NaCl solution with different concentrations was used for real-time acquisition and processing of the output spectrum. The reliability of the real-time acquisition and processing program for the CMRR sensor’s output spectrum is verified. The experimental results show that the wavelength drift of the CMRR sensor is linearly related to the concentration of the solution. It can be seen from the calculation that the sensitivity of the CMRR sensor for brine is about 671.03529 nm/RIU.
- integrated optics /
- cascaded microring resonators /
- envelope fitting /
- refractive index /
- optical resonator

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图 1 CMRR传感器显微图

Figure 1. Schematic of CMRR sensor’s micrograph

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图 2 CMRR传感器输出端输出光谱

Figure 2. Output spectrum of CMRR sensor

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图 3 CMRR传感器输出光谱检测原理图

Figure 3. Schematic diagram of spectra detection of CMRR sensor system

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图 4 微环传感器数据采集流程图

Figure 4. Flowchart of microring sensor data acquisition

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图 5 不同包络拟合法拟合结果比较

Figure 5. Comparison of fitting results of different envelope fitting methods

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图 6 CMRR谐振腔传感器输出光谱采集效果

Figure 6. Transmission spectrum acquisition of CMRR resonator sensor

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图 7 输出光谱漂移量及有效值点

Figure 7. Output spectrum drift and effective point values

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图 8 有效漂移量与浓度拟合关系

Figure 8. Fitting relationship between effective drift and concentration

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表 1 实验仪器与设备型号

Table 1. Experimental instruments and equipment models

仪器名称	实验用途	设备型号	生产公司
微流注射泵	定速进样	ZSB-SY03-60-M03-1	南京润泽流体
可调谐激光器	光源	81600B( DE43501059)	Agilent
功率计	探测输出光谱	N7748A	Agilent

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表 2 不同拟合法性能对比

Table 2. Performance comparison of different fitting methods

拟合方法	R-squared	灵敏度( nm/RIU)	误差百分比(%)
理想状态		674.205
平滑拟合法	0.998132234	685.523	1.67
高斯拟合法	0.994447952	625.246	7.29
洛伦兹拟合法	0.991580189	634.419	5.91
傅立叶拟合法	0.969335425	663.864	1.53

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