Optimization of All-Fiber Calibration-Free Wavelength-Modulated Laser Heterodyne System for Methane (CH4) Atmospheric Detection

IF 1 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Microwave and Optical Technology Letters Pub Date : 2025-05-14 DOI:10.1002/mop.70236

Chunyan Sun, Xueping Pan, Chencheng Qiu, Bowen Zhang, Jin Bai, Liwei Zhang, Peng Cheng, WangPing Cheng

{"title":"Optimization of All-Fiber Calibration-Free Wavelength-Modulated Laser Heterodyne System for Methane (CH4) Atmospheric Detection","authors":"Chunyan Sun, Xueping Pan, Chencheng Qiu, Bowen Zhang, Jin Bai, Liwei Zhang, Peng Cheng, WangPing Cheng","doi":"10.1002/mop.70236","DOIUrl":null,"url":null,"abstract":"<div>\n \n This paper presents a calibration-free wavelength-modulated laser heterodyne radiometer (CF-WM-LHR) system, including the LabVIEW-designed software signal generator and software digital lock-in amplifier, monitors atmospheric methane (CH4) column concentration in real-time. Hefei Institute of Physical Sciences experiments with specific laser and SR830 settings acquire six signals per measurement. The 2 f signal of CH4 reaches near its maximum at a 0.28 V optimal modulation voltage. A 395–520 MHz bandpass achieves 250 MHz (0.0083 cm−1) spectral resolution. Compared with SR830, the software digital lock-in amplifier can demodulate multiple signals and attain an improved 2 f/1 f SNR of 429.3. The CF-WM-LHR system provides new greenhouse gas detection methods, and the software digital lock-in amplifier is crucial for inversion.\n </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 5","pages":""},"PeriodicalIF":1.0000,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microwave and Optical Technology Letters","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/mop.70236","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}

引用次数: 0

Abstract

This paper presents a calibration-free wavelength-modulated laser heterodyne radiometer (CF-WM-LHR) system, including the LabVIEW-designed software signal generator and software digital lock-in amplifier, monitors atmospheric methane (CH₄) column concentration in real-time. Hefei Institute of Physical Sciences experiments with specific laser and SR830 settings acquire six signals per measurement. The 2 f signal of CH₄ reaches near its maximum at a 0.28 V optimal modulation voltage. A 395–520 MHz bandpass achieves 250 MHz (0.0083 cm⁻¹) spectral resolution. Compared with SR830, the software digital lock-in amplifier can demodulate multiple signals and attain an improved 2 f/1 f SNR of 429.3. The CF-WM-LHR system provides new greenhouse gas detection methods, and the software digital lock-in amplifier is crucial for inversion.

查看原文本刊更多论文

甲烷大气探测全光纤无校准波长调制激光外差系统的优化

本文介绍了一种无需校准的波长调制激光外差辐射计（CF-WM-LHR）系统，该系统包括labview设计的软件信号发生器和软件数字锁相放大器，可实时监测大气甲烷（CH4）柱浓度。合肥物理科学研究所在特定的激光和SR830设置下进行实验，每次测量获得6个信号。CH4的2f信号在0.28 V的最佳调制电压下接近最大值。395 ~ 520mhz的带通可实现250mhz （0.0083 cm−1）的频谱分辨率。与SR830相比，软件数字锁相放大器可以解调多个信号，信噪比提高到2f / 1f，达到429.3。CF-WM-LHR系统提供了新的温室气体检测方法，而软件数字锁相放大器是实现反演的关键。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Microwave and Optical Technology Letters 工程技术-工程：电子与电气

CiteScore

3.40

自引率

20.00%

发文量

371

审稿时长

4.3 months

期刊介绍： Microwave and Optical Technology Letters provides quick publication (3 to 6 month turnaround) of the most recent findings and achievements in high frequency technology, from RF to optical spectrum. The journal publishes original short papers and letters on theoretical, applied, and system results in the following areas. - RF, Microwave, and Millimeter Waves - Antennas and Propagation - Submillimeter-Wave and Infrared Technology - Optical Engineering All papers are subject to peer review before publication