摘要
用DFB半导体激光器作光源的腔增强吸收光谱(CEAS)技术测量了烟雾箱中甲烷气体在近红外波段的光谱吸收,获得了烟雾箱内甲烷气体在1315 nm附近的吸收光谱;将测得的光谱数据与Hitran 2004数据库给出的光谱参数做了比较,发现了几条尚未被Hitran 2004数据库收入的甲烷分子的新谱线;同时对CEAS技术定量测量烟雾箱内甲烷气体的能力和稳定性做了研究.结果表明,CEAS技术完全可以用来测量烟雾箱内甲烷气体的吸收光谱,可以作为烟雾箱检测方法的一种补充.
The technique of cavity enhanced absorption spectroscopy(CEAS) is used to measure the spectral absorption of methane in smog chamber,with a DFB diode laser as the light source.Absorption spectrum of methane near 1 315 nm is obtained.By comparing with the Hitran 2004 database,several new absorption lines of methane are found.In addition,quantitative measurement ability and measurement stability of CEAS is also studied.It is demonstrated that CEAS can be used to measure the absorption spectrum of methane in smog chamber,and it is a good supplement for the smog chamber detection.
出处
《西北师范大学学报(自然科学版)》
CAS
2008年第3期61-65,共5页
Journal of Northwest Normal University(Natural Science)
基金
南京信息工程大学科研基金资助