Trace-gas sensing using the compliance voltage of an external cavity quantum cascade laser

Mark C. Phillips; Matthew S. Taubman

doi:10.1117/12.2015858

29 May 2013 Trace-gas sensing using the compliance voltage of an external cavity quantum cascade laser

Proceedings Volume 8726, Next-Generation Spectroscopic Technologies VI; 87260D (2013) https://doi.org/10.1117/12.2015858
Event: SPIE Defense, Security, and Sensing, 2013, Baltimore, Maryland, United States

Abstract

We present experimental demonstration of a new chemical sensing technique based on intracavity absorption in an external cavity quantum cascade laser (ECQCL). This new technique eliminates the need for an infrared photodetector and gas cell by detecting the intracavity absorption spectrum in the compliance voltage of the laser device itself. To demonstrate and characterize the technique, we measure infrared absorption spectra of chemicals including acetone and Freon-134a. Sub-ppm detection limits in one second are achieved, with the potential for increased sensitivity after further optimization. The technique enables development of handheld, high-sensitivity, and high-accuracy trace gas sensors for in-field use.

Citation Download Citation

Mark C. Phillips and Matthew S. Taubman "Trace-gas sensing using the compliance voltage of an external cavity quantum cascade laser", Proc. SPIE 8726, Next-Generation Spectroscopic Technologies VI, 87260D (29 May 2013); https://doi.org/10.1117/12.2015858

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available