光学学报, 2018, 38 (12): 1230001, 网络出版: 2019-05-10
基于2.73 μm分布反馈式激光器同时在线测量呼出气体中的CO2和水汽
Simultaneous On-Line Measurement of Exhaled Carbon Dioxide and Water Vapor Based on 2.73 μm Distributed Feedback Laser
图 & 表
图 3. 不同压力下2f信号峰值随调制振幅的变化
Fig. 3. Variation of 2f signal peak height with modulation amplitude at different pressures
图 4. 2f信号峰值随(a)调制相位、(b)调制频率的变化
Fig. 4. Variations of 2f signal peak height with (a) modulation phase and (b) modulation frequency
图 5. 2f信号峰值与CO2体积分数之间的关系
Fig. 5. Relation between 2f signal peak height and volume fraction of CO2
图 6. (a) 2f信号峰值与CO2体积分数的拟合关系;(b)局部放大图
Fig. 6. (a) Fitted relation between 2f signal peak height and volume fraction of CO2; (b) partial enlarged detail
图 7. (a) 2f信号峰值与水汽体积分数之间的关系;(b)局部放大图
Fig. 7. (a) Relation between 2f signal peak height and volume fraction of water vapor; (b) partial enlarged detail
图 8. 实验测量得到的呼出气体中CO2和水汽的2f信号
Fig. 8. 2f signals of exhaled CO2 and water vapor obtained by experimental measurement
图 9. 2个志愿者呼吸过程中CO2体积分数的变化。(a)第1个志愿者;(b)第2个志愿者
Fig. 9. Variations of volume fraction of CO2 during respiration of two volunteers. (a) The first volunteer; (b) the second volunteer
图 10. 第1个志愿者呼吸过程中水汽体积分数的变化
Fig. 10. Variation of volume fraction of water vapor during respiration of the first volunteer
图 11. (a) CO2体积分数偏差随测量时间的分布;(b) CO2体积分数偏差的频数分布直方图以及高斯线型拟合
Fig. 11. (a) Distribution of CO2volume fraction deviation with measurement time; (b) frequency distribution histogram of CO2 volume fraction deviation and Gaussian lineshape fitting
吴涛, 张怀林, 孔维平, 何兴道, 陈忠平, 陈卫东. 基于2.73 μm分布反馈式激光器同时在线测量呼出气体中的CO2和水汽[J]. 光学学报, 2018, 38(12): 1230001. Tao Wu, Huailin Zhang, Weiping Kong, Xingdao He, Zhongping Chen, Weidong Chen. Simultaneous On-Line Measurement of Exhaled Carbon Dioxide and Water Vapor Based on 2.73 μm Distributed Feedback Laser[J]. Acta Optica Sinica, 2018, 38(12): 1230001.
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