Mid-infrared, interband-cascade, light-emitting devices (ICLEDs) have the potential to improve the performance of trace-gas sensors for air quality and greenhouse gas measurements. ICLEDs are broadband, incoherent, high-optical-power devices (up to ~5 mW continuous-wave at room temperature). We present an ICLED-based, methane sensor using a hollow-core fiber and direct absorption spectroscopy. A 1σ noise equivalent absorption of 0.17 ppmv CH4 at 1 Hz was achieved (1.13e-5 absorbance). Sub-ppmv methane detection is relevant for monitoring emissions near sources such as petrochemical infrastructure, agricultural activities, and wastewater treatment plants.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
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.