Quantum cascade laser-based sensor system for hydrogen peroxide detection

Wei Ren; Wenzhe Jiang; Nancy Sanchez; Pietro Patimisco; Vincenzo Spagnolo; Chung-en Zah; Feng Xie; Lawrence C. Hughes Jr.; Robert J. Griffin; Frank K. Tittel

doi:10.1117/12.2039557

31 January 2014 Quantum cascade laser-based sensor system for hydrogen peroxide detection

Wei Ren, Wenzhe Jiang, Nancy Sanchez, Pietro Patimisco, Vincenzo Spagnolo, Chung-en Zah, Feng Xie, Lawrence C. Hughes Jr., Robert J. Griffin, Frank K. Tittel

Author Affiliations +

Proceedings Volume 8993, Quantum Sensing and Nanophotonic Devices XI; 89931X (2014) https://doi.org/10.1117/12.2039557
Event: SPIE OPTO, 2014, San Francisco, California, United States

Abstract

A quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor system was developed for the sensitive detection of hydrogen peroxide (H₂O₂) using its absorption transitions in the v6 fundamental band near 7.73 μm. The recent availability of distributed-feedback quantum cascade lasers (DFB-QCLs) provides convenient access to a strong H₂O₂ absorption line located at 1295.55 cm^-1. Sensor calibration was performed by means of a water bubbler that generated titrated average vapor concentrations. A minimum detection limit of 75 parts per billion (ppb) was achieved at a pressure of 80 torr for a 1 sec data acquisition time. The long-term repeatability and stability of the sensor was investigated by measuring time-varying H₂O₂ mixtures for ~2 hrs. An Allan deviation analysis was performed to investigate the long-term performance of the QEPAS sensor system, indicating the feasibility of a minimum detection limit of 12 ppb using the optimum data averaging time of 100 sec.

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Wei Ren, Wenzhe Jiang, Nancy Sanchez, Pietro Patimisco, Vincenzo Spagnolo, Chung-en Zah, Feng Xie, Lawrence C. Hughes Jr., Robert J. Griffin, and Frank K. Tittel "Quantum cascade laser-based sensor system for hydrogen peroxide detection", Proc. SPIE 8993, Quantum Sensing and Nanophotonic Devices XI, 89931X (31 January 2014); https://doi.org/10.1117/12.2039557

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