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Title: Compact TDLAS based optical sensor for ppb-level ethane detection by use of a 3.34 μm room-temperature CW interband cascade laser

Journal Article · · Sensors and Actuators. B, Chemical
 [1];  [2];  [1];  [3]
  1. Rice Univ., Houston, TX (United States). Dept. of Electrical and Computer Engineering; Jilin Univ., Changchun (China). State Key Lab. on Integrated Optoelectronics and College of Electronic Science and Engineering
  2. Rice Univ., Houston, TX (United States). Dept. of Electrical and Computer Engineering; Shanxi Univ., Taiyuan (China). State Key Lab. of Quantum Optics and Quantum Optics Devices and Inst. of Laser Spectroscopy
  3. Rice Univ., Houston, TX (United States). Dept. of Electrical and Computer Engineering

A mid-infrared ethane (C2H6) sensor based on a wavelength modulation spectroscopy (WMS) technique was developed using a thermoelectrically cooled (TEC), continuous-wave (CW) interband cascade laser (ICL) emitting at 3.34 μm and a dense multi-pass gas cell (MPGC, 17 × 6.5 × 5.5 cm3) with a 54.6 m optical path length. A compact optical sensor system with a physical size of 35.5 × 18 × 12.5 cm3 was designed and constructed. An ICL was employed for targeting a strong C2H6 line at 2996.88 cm-1 at <100 Torr gas pressure in the fundamental absorption band of C2H6. The sensor performance, including the minimum detection limit (MDL) and the stability were improved by reducing the effect of laser power drift by means of the 2f/1f-WMS technique. A MDL of ~1.2 parts per billion (ppbv) for 2f-WMS and ~1.0 ppbv for 2f/1f-WMS were achieved, respectively, with a measurement time of 4 s. The MDL was further improved from 299 pptv (@108 s for 2f-WMS) to 239 pptv (@208 s for 2f/1f-WMS), based on an Allan deviation analysis.The rise time (@0 → 100 ppbv) and fall time (@100 → 0 ppbv) were determined to be ~64 s and ~48 s,respectively, at a gas pressure of <100 Torr for the C2H6 sensor operation.

Research Organization:
Rice Univ., Houston, TX (United States)
Sponsoring Organization:
USDOE Advanced Research Projects Agency - Energy (ARPA-E); China Scholarship Council; National Science Foundation (NSF); Welch Foundation, Houston, TX (United States); National Natural Science Foundation of China (NSFC); Changchun Municipal Science and Technology Bureau
Grant/Contract Number:
AR0000538; 201406170107; C-0586; IIP-1230427; AR0000547; AR0000545; 201506175025; 61307124; 14KG022; 61575113; 61275213
OSTI ID:
1435936
Report Number(s):
DOE-MAXION-00538-16; PII: S092540051630435X
Journal Information:
Sensors and Actuators. B, Chemical, Vol. 232, Issue C; ISSN 0925-4005
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 84 works
Citation information provided by
Web of Science

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A near-infrared carbon dioxide sensor system using a compact folded optical structure for deep-sea natural gas hydrate exploration journal January 2018
High-speed multi-pass tunable diode laser absorption spectrometer based on frequency-modulation spectroscopy journal January 2018
Calculation model of dense spot pattern multi-pass cells based on a spherical mirror aberration journal January 2019
Study on Mnospectral Peak Identification of Hard Target Based on Brewster Angle journal January 2020
A Trace C2H2 Sensor Based on an Absorption Spectrum Technique Using a Mid-Infrared Interband Cascade Laser journal October 2018
Highly sensitive and selective CO sensor using a 233 μm diode laser and wavelength modulation spectroscopy journal January 2018
Mid-Infrared Tunable Laser-Based Broadband Fingerprint Absorption Spectroscopy for Trace Gas Sensing: A Review journal January 2019
CH 4 Concentration Distribution in a Semiconductor Process Chamber Measured by the CT-TDLAS journal January 2018