Development of a tunable mid-IR difference frequency laser source for highly sensitive airborne trace gas detection [0.03%]
一种可调谐中红外差频激光源的研制及其痕量气体探测应用研究
D Richter,A Fried,B P Wert et al.
D Richter et al.
The development of a compact tunable mid-IR laser system at 3.5 micrometers for quantitative airborne spectroscopic trace gas absorption measurements is reported. The mid-IR laser system is based on difference frequency generation (DFG) in ...
Development of a cw-laser-based cavity-ringdown sensor aboard a spacecraft for trace air constituents [0.03%]
基于cw激光的机载腔衰荡传感器用于痕量气体探测
A R Awtry,J H Miller
A R Awtry
The progress in the development of a sensor for the detection of trace air constituents to monitor spacecraft air quality is reported. A continuous-wave (cw), external-cavity tunable diode laser centered at 1.55 micrometers is used to pump ...
Ambient formaldehyde detection with a laser spectrometer based on difference-frequency generation in PPLN [0.03%]
基于PPLN中差频生成的激光光谱仪检测甲醛
D Rehle,D Leleux,M Erdelyi et al.
D Rehle et al.
A laser spectrometer based on difference-frequency generation in periodically poled LiNbO3 (PPLN) has been used to quantify atmospheric formaldehyde with a detection limit of 0.32 parts per billion in a given volume (ppbV) using specificall...
Applications of Kalman filtering to real-time trace gas concentration measurements [0.03%]
卡尔曼滤波在实时痕量气体浓度测量中的应用
D P Leleux,R Claps,W Chen et al.
D P Leleux et al.
A Kalman filtering technique is applied to the simultaneous detection of NH3 and CO2 with a diode-laser-based sensor operating at 1.53 micrometers. This technique is developed for improving the sensitivity and precision of trace gas concent...
Detection of biogenic CO production above vascular cell cultures using a near-room-temperature QC-DFB laser [0.03%]
用准连续分布式反馈量子级联激光器在接近室温条件下检测血管细胞培养物上方的生物源一氧化碳生成量
A A Kosterev,F K Tittel,W Durante et al.
A A Kosterev et al.
We report the first application of pulsed, near-room-temperature quantum cascade laser technology to the continuous detection of biogenic CO production rates above viable cultures of vascular smooth muscle cells. A computer-controlled seque...
L Menzel,A A Kosterev,R F Curl et al.
L Menzel et al.
Two configurations of a continuous wave quantum cascade distributed feedback laser-based gas sensor for the detection of NO at a parts per billion (ppb) concentration level, typical of biomedical applications, have been investigated. The la...
Mid-infrared trace gas detection using continuous-wave difference frequency generation in periodically poled RbTiOAsO4 [0.03%]
基于周期极化RbTiOAsO4中连续波差频产生的中期红外痕量气体检测
W Chen,G Mouret,D Boucher et al.
W Chen et al.
A tunable mid-infrared continuous-wave (cw) spectroscopic source in the 3.4-4.5 micrometers region is reported, based on difference frequency generation (DFG) in a quasi-phase-matched periodically poled RbTiOAsO4 (PPRTA) crystal. DFG power ...
Portable fiber-coupled diode-laser-based sensor for multiple trace gas detection [0.03%]
一种便携式多组分痕量气体检测的半导体激光传感器
D G Lancaster,D Richter,F K Tittel
D G Lancaster
Tunable narrowband mid-infrared radiation from 3.25 to 4.4 micrometers is generated by a compact fiber-coupled, difference-frequency-based spectroscopic source. A 20-mW external cavity diode laser (with a tuning range from 814 to 870 nm) an...