本文選題：可調(diào)諧二極管激光器　切入點(diǎn)：吸收光譜　出處：《物理學(xué)報》2017年20期 　論文類型：期刊論文

【摘要】：精確的氣體光譜參數(shù)對氣體濃度、溫度等的光譜精確反演測量具有十分重要的意義,針對當(dāng)前主流光譜數(shù)據(jù)庫(例如HITRAN)中數(shù)據(jù)與實(shí)際數(shù)值存在相當(dāng)誤差的問題,自主研制了一套基于靜態(tài)冷卻技術(shù)的低溫光譜實(shí)驗平臺,用于精確測量低溫下的氣體吸收光譜參數(shù).運(yùn)用該低溫光譜實(shí)驗平臺,采用可調(diào)諧二極管激光吸收光譜(TDLAS)技術(shù)測量了溫度為230—340 K、壓強(qiáng)為10—1000 Pa時7240—7246 cm~(-1)波段的純水汽振轉(zhuǎn)躍遷光譜.采用Voigt線型多峰擬合方法,獲得了5條水汽振轉(zhuǎn)躍遷譜在不同溫度、不同壓強(qiáng)下的積分吸光度值及洛倫茲展寬值,運(yùn)用線性擬合的方法得到這5條吸收線的自展寬半峰全寬系數(shù)及參考溫度下的線強(qiáng)值.運(yùn)用不確定度傳遞公式,計算得到實(shí)驗結(jié)果的不確定度,與HITRAN2012數(shù)據(jù)庫中的線參數(shù)進(jìn)行對比,所測的5條吸收線中實(shí)驗結(jié)果與數(shù)據(jù)庫值最大相差10.96%,且實(shí)驗結(jié)果的不確定度為1.11%—2.98%(置信概率p=95%,包含因子k=2),小于HITRAN2012數(shù)據(jù)庫值的不確定度.
[Abstract]:Accurate spectral parameters of gas are of great significance to the spectral inversion of gas concentration, temperature, etc. Aiming at the problem that the data in the current mainstream spectral database (such as HITRAN) are quite different from the actual values, A set of low temperature spectrum experimental platform based on static cooling technology has been developed, which is used to accurately measure the parameters of gas absorption spectrum at low temperature. The pure water vapor vibrational transition spectra in the temperature range of 230-340 K and the pressure of 10-1000 Pa were measured by tunable diode laser absorption spectroscopy (TDLASS). Using the Voigt linear multi-peak fitting method, five water vapor vibrational transition spectra were obtained at different temperatures. The integral absorbance value and Lorentz broadening value at different pressures are obtained by linear fitting method. The full width coefficient of the self-broadening half peak and the line strength at the reference temperature are obtained by the linear fitting method, and the uncertainty transfer formula is used. The uncertainty of the experimental results is calculated and compared with the line parameters in the HITRAN2012 database. Among the five absorption lines measured, the maximum difference between the experimental results and the database value is 10.96, and the uncertainty of the experimental results is 1.11-2.98 (confidence probability p95, including the factor kan2n, less than the uncertainty of the HITRAN2012 database value.
【作者單位】： 中國科學(xué)院合肥物質(zhì)科學(xué)研究院安徽光學(xué)精密機(jī)械研究所環(huán)境光學(xué)與技術(shù)重點(diǎn)實(shí)驗室;中國科學(xué)技術(shù)大學(xué);
【基金】：國家重大科學(xué)儀器設(shè)備開發(fā)專項(批準(zhǔn)號:2014YQ060537)資助的課題~~
【分類號】：O433.1

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