TN761 98021197电光调制器在光波偏振态检测中的应用=Applicationof electrooptic modulator to measuring thestate of optical polarization[刊,中]/姚若亚(北京电力高等专科学校.北京(100044)),崔翔,李长胜,张卫东(华北电力大学)∥...TN761 98021197电光调制器在光波偏振态检测中的应用=Applicationof electrooptic modulator to measuring thestate of optical polarization[刊,中]/姚若亚(北京电力高等专科学校.北京(100044)),崔翔,李长胜,张卫东(华北电力大学)∥传感技术学报.-1997,10(2).-43-46提出了检测光波偏振态的一种新方法,即电光调制法。展开更多
Two measuring methods of the wide absorption spectrum by distributed feedback laser diodes （DFB-LDs） are presented in detecting the water vapor absorption line. One is the subsection scanning method, and it takes ad...Two measuring methods of the wide absorption spectrum by distributed feedback laser diodes （DFB-LDs） are presented in detecting the water vapor absorption line. One is the subsection scanning method, and it takes advantage of the wide spectrum tuning range by the temperature modulation and fast spectrum tuning speed by current modulation. Specifically, this method is realized by dividing a target spectral region into several sections which correspond to the specific temperature of DFB-LD, scanning every section by current modulation for hundreds times, and averaging the data to raise the signal to noise ratio （SNR）, then combining all sections to get the whole spectrum. An accuracy of 10ppmv had been obtained in the measurement of water vapor with a 10-cm path length by this method. Another is data fitting method, based on the absorption line-shape function; the absorption line can be described by fitting with partial measured data. The fitting absorption line was fitted well with the measured data, and the square of correlation coefficient （R-square） was no less than 0.99.展开更多
文摘TN761 98021197电光调制器在光波偏振态检测中的应用=Applicationof electrooptic modulator to measuring thestate of optical polarization[刊,中]/姚若亚(北京电力高等专科学校.北京(100044)),崔翔,李长胜,张卫东(华北电力大学)∥传感技术学报.-1997,10(2).-43-46提出了检测光波偏振态的一种新方法,即电光调制法。
基金This work was supported by Natural Science Foundation of China （60977058 ＆ 61205083）, Independent Innovation Foundation of Shandong University （IIFSDU2010JC002 ＆ 2012JC015）, the key technology projects of Shandong Province （2010GGX10137）, and promotive research fund for excellent young and middle-aged scientists of Shandong Province （BS2010DX028）. Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author（s） and source are credited.
文摘Two measuring methods of the wide absorption spectrum by distributed feedback laser diodes （DFB-LDs） are presented in detecting the water vapor absorption line. One is the subsection scanning method, and it takes advantage of the wide spectrum tuning range by the temperature modulation and fast spectrum tuning speed by current modulation. Specifically, this method is realized by dividing a target spectral region into several sections which correspond to the specific temperature of DFB-LD, scanning every section by current modulation for hundreds times, and averaging the data to raise the signal to noise ratio （SNR）, then combining all sections to get the whole spectrum. An accuracy of 10ppmv had been obtained in the measurement of water vapor with a 10-cm path length by this method. Another is data fitting method, based on the absorption line-shape function; the absorption line can be described by fitting with partial measured data. The fitting absorption line was fitted well with the measured data, and the square of correlation coefficient （R-square） was no less than 0.99.
