High-sensitivity detectors based on cavity ring-down spectroscopy

Barbara Alice Paldus; Bernard G. Fidric; Steve S. Sanders; Sze Meng Tan; Hoa Pham; Alexander A. Kachanov; Edward H. Wahl; Eric R. Crosson

doi:10.1117/12.578374

29 December 2004 High-sensitivity detectors based on cavity ring-down spectroscopy

Barbara Alice Paldus, Bernard G. Fidric, Steve S. Sanders, Sze Meng Tan, Hoa Pham, Alexander A. Kachanov, Edward H. Wahl, Eric R. Crosson

Author Affiliations +

Proceedings Volume 5617, Optically Based Biological and Chemical Sensing for Defence; (2004) https://doi.org/10.1117/12.578374
Event: European Symposium on Optics and Photonics for Defence and Security, 2004, London, United Kingdom

Abstract

Cavity ring-down spectroscopy (CRDS) can provide high sensitivity, high precision, and absolute calibration in a wide range of environments. We report on a compact cavity ring-down spectrometer that can measure atmospheric toxic industrial compounds such as hydrides and hydrazines. The ring-down spectrometer is fully contained in two 5 ¼" tall, 19" wide rack mount enclosures and utilizes a robust, near-infrared, fiber-coupled tunable diode laser. The instrument has a baseline sensitivity of 8 x 10^-11 cm^-1/Hz^½. We will present the results of this study, which demonstrates the capability to detect toxic gases such as arsine, silane, and hydrazine (simulated using ammonia) in air at parts per billion (ppb) concentrations in less than 1 minute. We will also present results on CRDS instrument performance, including zero drift, precision, absolute accuracy, and linearity over a wide range of environmental operating conditions.

Citation Download Citation

Barbara Alice Paldus, Bernard G. Fidric, Steve S. Sanders, Sze Meng Tan, Hoa Pham, Alexander A. Kachanov, Edward H. Wahl, and Eric R. Crosson "High-sensitivity detectors based on cavity ring-down spectroscopy", Proc. SPIE 5617, Optically Based Biological and Chemical Sensing for Defence, (29 December 2004); https://doi.org/10.1117/12.578374

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