Oxygen isotope ratio measurements in CO_2 by means of a continuous-wave quantum cascade laser at 43 μm

2007 ◽  
Vol 32 (20) ◽  
pp. 3047 ◽  
Author(s):  
Antonio Castrillo ◽  
Giovanni Casa ◽  
Livio Gianfrani
Keyword(s):  
Oxygen Isotope ◽  
Quantum Cascade Laser ◽  
Isotope Ratio ◽  
Continuous Wave ◽  
Oxygen Isotope Ratio ◽  
Quantum Cascade ◽  
Isotope Ratio Measurements

Water-vapor isotope ratio measurements in air with a quantum-cascade laser spectrometer

2006 ◽  
Vol 31 (2) ◽  
pp. 143 ◽  
Author(s):  
L. Joly ◽  
V. Zéninari ◽  
B. Parvitte ◽  
D. Courtois ◽  
G. Durry
Keyword(s):  
Water Vapor ◽  
Quantum Cascade Laser ◽  
Isotope Ratio ◽  
Laser Spectrometer ◽  
Quantum Cascade ◽  
Isotope Ratio Measurements

A new isotopic reference material for stable hydrogen and oxygen isotope-ratio measurements of water - USGS50 Lake Kyoga Water

2015 ◽  
Vol 29 (21) ◽  
pp. 2078-2082 ◽  
Author(s):  
Tyler B. Coplen ◽  
Leonard I. Wassenaar ◽  
Christine Mukwaya ◽  
Haiping Qi ◽  
Jennifer M. Lorenz
Keyword(s):  
Reference Material ◽  
Oxygen Isotope ◽  
Isotope Ratio ◽  
Oxygen Isotope Ratio ◽  
Hydrogen And Oxygen Isotope ◽  
Isotope Ratio Measurements

Standoff Detection of Oil and Powder Mixtures at 12 Meters Using a Tunable Quantum Cascade Laser-Based System with a Close Focus Telescope and Uncooled Infrared Detector

2021 ◽  
pp. 000370282110603
Author(s):  
J. Chance Carter ◽  
Phillip H. Paul ◽  
Joshua M. Ottaway ◽  
Peter Haugen ◽  
Anastacia M. Manuel
Keyword(s):  
Quantum Cascade Laser ◽  
Continuous Wave ◽  
Infrared Detector ◽  
Wave Mode ◽  
Infrared Source ◽  
Powder Mixtures ◽  
Quantum Cascade ◽  
System A ◽  
Continuous Wave Mode ◽  
Lock In

We have designed and demonstrated a quantum cascade laser (QCL) based standoff system that utilizes an uncooled mercury cadmium telluride (MCT) detector with lock-in signal processing for chemical identification at a distance of 12.5 meters in indoor ambient light conditions. In the system, a tunable quad-QCL operating (1 MHz) in quasi-continuous wave mode between 8.45 and 10.03 μm (∼1182 to 1000 cm−1) serves as the active mid-infrared source for remotely interrogating mineral, powder, and thin film oil samples including powder mixtures (6, 12.5, 25, and 50%) of crystalline quartz (SiO2) in KBr. Light as reflected from a given sample is collected using a 10-inch (25.4 cm) Dall Kirkham telescope and coupled with ZnSe optics to an uncooled MCT detector. The mixture dependence of the highly transparent KBr and strongly absorbing quartz was found to fit a modified version of the Schatz reflectance model for compacted powder mixtures. All reflectance spectra reported are relative to an Au-coated diffuse reflector. A NIST traceable polystyrene standard reflector was also used to determine the QCL wavelength tuning range and calibration.

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