Spectrum Intensity Ratio Detection for Frequency Domain Weak Measurement System
Spectrum Intensity Ratio Detection for Frequency Domain Weak Measurement System
复制标题
频域弱测量系统的频谱强度比检测
DOI：
10.1109/jphot.2019.2942718
复制
发表时间：
2020
影响因子：
2.4
通讯作者：
Ji Yanhong
中科院分区：
文献类型：
--
作者：
Yang Yuxuan;Xu Yang;Guan Tian;Shi Lixuan;Li Jinyu;Li Dongmei;He Yonghong;Wang Xiangnan;Li Zhangyan;Ji Yanhong
传统的频域微弱测量方法存在较大的噪声干扰。本文对实验得到的2000条曲线进行了分析，得出信噪比会随着信号强度的增加而增加的结论。我们模拟了由相变产生的252条曲线，并利用这一点来拟合原始计算方法与我们的谱高比（HR）方法之间的关系。通过前期实验数据验证，我们的方法可以大大降低频域弱测量中双模工作区的系统噪声。目前，通用的频域微弱测量和测量系统越来越受到重视。本文介绍了一种带谱高比的频域弱测量方法，该方法可以大大降低频域弱测量双峰工作区的系统噪声。并在全内反射微弱测量系统上进行了对比实验。实验结果表明，采用HR方法得到的系统分辨率为6.33 × 10（-7）RIU，比弱频测量中常用的中心波长偏移算法提高了一个数量级。
The traditional method of frequency domain weak measurement has a lot of noise. In this paper, we analyze the 2000 curves obtained by experiments and get the conclusion that the signal-to-noise ratio will increase with the increase of signal strength. We simulated the 252 curves produced by the phase change and used this to fit the relationship between the original calculation method and our spectral height ratio (HR) method. Through previous experimental data verification, our method can greatly reduce the system noise of the dual-mode working area in the frequency domain weak measurement. At present, universal frequency domain weak measurement and measurement system have received increasing attention. In this paper, we introduce a frequency domain weak measurement with spectrum height ratio (HR) that can greatly reduce the system noise in the frequency domain weak measurement bimodal work area. Moreover, we completed comparative experiments on a total internal reflection weak measurement system. The experimental results show that the system resolution obtained by using the HR method is 6.33 x 10(-7) RIU, which is an order of magnitude higher than that of the conventional center wavelength offset algorithm which is commonly used in weak frequency measurement.