戴峰,常建华,房久龙,唐安庆.差频产生中红外光源及甲烷气体光谱检测[J].电子测量与仪器学报,2017,31(9):1447-1452
差频产生中红外光源及甲烷气体光谱检测
Mid infrared light source based on difference frequency generation and detection of methane gas spectrum
  
DOI:10.13382/j.jemi.2017.09.015
中文关键词:  中红外  差频产生  准相位匹配  气体检测
英文关键词:mid infrared  difference frequency generation  quasi phase matching  gas detection
基金项目:国家自然科学基金(11374161)、江苏省重点研发计划(BE2016756)、江苏高校优势学科Ⅱ期建设工程、江苏省高校品牌专业建设工程资助项目
作者单位
戴峰 南京信息工程大学江苏省大气环境与装备技术协同创新中心南京210044 
常建华 1.南京信息工程大学江苏省大气环境与装备技术协同创新中心南京210044;2.南京信息工程大学江苏省气象探测与信息处理重点实验室南京210044 
房久龙 南京信息工程大学江苏省大气环境与装备技术协同创新中心南京210044 
唐安庆 南京信息工程大学江苏省大气环境与装备技术协同创新中心南京210044 
AuthorInstitution
Dai Feng Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science & Technology, Nanjing 210044, China 
Chang Jianhua 1. Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science & Technology, Nanjing 210044, China;2. Jiangsu key Laboratory of Meteorological Observation and Information Processing, Nanjing University of Information Science & Technology, Nanjing 210044, China 
Fang Jiulong Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science & Technology, Nanjing 210044, China 
Tang Anqing Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science & Technology, Nanjing 210044, China 
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中文摘要:
      连续波可调谐中红外光源在大气探测、工业生产、医学诊断等领域具有重要的应用价值。基于准相位匹配(QPM)差频产生(DFG)技术,以1 060和1 550 nm波段窄线宽激光器作为基频光源,在周期极化铌酸锂(PPLN)晶体中获得了中红外激光输出。实验系统研究了该中红外DFG光源的转化效率、温度和波长调谐特性。在此基础上,基于所设计的中红外DFG光源构建了甲烷气体检测系统,通过扫描泵浦光波长获得了甲烷分子v3基频振动带2 999.01 cm-1处的吸收光谱。
英文摘要:
      The availability of continuous wave tunable light source in the mid infrared region is valuable for atmospheric sounding, industrial production, medical diagnosis, etc. 1 060 and 1 550 nm band narrow linewidth laser is used as the fundamental light source, the mid infrared light source based on difference frequency generation (DFG) and quasi phase matching (QPM) technique has been realized in a periodically poled LiNbO3 (PPLN) crystal. The conversion efficiency, the temperature and the wavelength tuning characteristic of the mid infrared light source are studied experimentally. Based on the results described above, a gas detection system based on the mid infrared DFG laser source is constructed and the absorption spectrum at 2 999.01 cm-1 of v3 fundamental vibrational band of CH4 molecules is measured by scanning the wavelength of the pump laser.
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