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Title: Part-Per-Trillion Level SF6 Detection Using a Quartz Enhanced Photoacoustic Spectroscopy-Based Sensor with Single-Mode Fiber-Coupled Quantum Cascade Laser Excitation

Abstract

A sensitive spectroscopic sensor based on a hollow-core fiber-coupled quantum cascade laser (QCL) emitting at 10.54 µm and quartz enhanced photoacoustic spectroscopy (QEPAS) technique is reported. The design and realization of mid-infrared fiber and coupler optics has ensured single-mode QCL beam delivery to the QEPAS sensor . The collimation optics was designed to produce a laser beam of significantly reduced beam size and waist so as to prevent illumination of the quartz tuning fork and micro-resonator tubes. SF6 was selected as the target gas. A minimum detection sensitivity of 50 parts per trillion in 1 s was achieved with a QCL power of 18 mW, corresponding to a normalized noise-equivalent absorption of 2.7x10-10 W•cm-1/Hz1/2.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1054051
Report Number(s):
PNNL-SA-91138
NN2001000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Optics Letters, Volume 37(21):4461-4463
Additional Journal Information:
Journal Name: Optics Letters, Volume 37(21):4461-4463
Country of Publication:
United States
Language:
English
Subject:
Laser Sensors; Semiconductor Lasers

Citation Formats

Spagnolo, V., Patimisco, P., Borri, Simone, Scamarcio, G., Bernacki, Bruce E., and Kriesel, J.M. Part-Per-Trillion Level SF6 Detection Using a Quartz Enhanced Photoacoustic Spectroscopy-Based Sensor with Single-Mode Fiber-Coupled Quantum Cascade Laser Excitation. United States: N. p., 2012. Web. doi:10.1364/OL.37.004461.
Spagnolo, V., Patimisco, P., Borri, Simone, Scamarcio, G., Bernacki, Bruce E., & Kriesel, J.M. Part-Per-Trillion Level SF6 Detection Using a Quartz Enhanced Photoacoustic Spectroscopy-Based Sensor with Single-Mode Fiber-Coupled Quantum Cascade Laser Excitation. United States. doi:10.1364/OL.37.004461.
Spagnolo, V., Patimisco, P., Borri, Simone, Scamarcio, G., Bernacki, Bruce E., and Kriesel, J.M. Tue . "Part-Per-Trillion Level SF6 Detection Using a Quartz Enhanced Photoacoustic Spectroscopy-Based Sensor with Single-Mode Fiber-Coupled Quantum Cascade Laser Excitation". United States. doi:10.1364/OL.37.004461.
@article{osti_1054051,
title = {Part-Per-Trillion Level SF6 Detection Using a Quartz Enhanced Photoacoustic Spectroscopy-Based Sensor with Single-Mode Fiber-Coupled Quantum Cascade Laser Excitation},
author = {Spagnolo, V. and Patimisco, P. and Borri, Simone and Scamarcio, G. and Bernacki, Bruce E. and Kriesel, J.M.},
abstractNote = {A sensitive spectroscopic sensor based on a hollow-core fiber-coupled quantum cascade laser (QCL) emitting at 10.54 µm and quartz enhanced photoacoustic spectroscopy (QEPAS) technique is reported. The design and realization of mid-infrared fiber and coupler optics has ensured single-mode QCL beam delivery to the QEPAS sensor . The collimation optics was designed to produce a laser beam of significantly reduced beam size and waist so as to prevent illumination of the quartz tuning fork and micro-resonator tubes. SF6 was selected as the target gas. A minimum detection sensitivity of 50 parts per trillion in 1 s was achieved with a QCL power of 18 mW, corresponding to a normalized noise-equivalent absorption of 2.7x10-10 W•cm-1/Hz1/2.},
doi = {10.1364/OL.37.004461},
journal = {Optics Letters, Volume 37(21):4461-4463},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {10}
}