A novel lidar emitter is experimentally tested to measure sarin, sulfur mustard and SF using differential absorption spectroscopy in the long-wave infrared. The authors provide a nice discussion on lidar requirements and state-of-the-art sources for chemical warfare agents that readers will appreciate as it relates to the system described here, as well as context for their own work. The parametric source emitter can be tuned to address various species on demand between 7.3 and 10.5 um. Field tests were performed using a closed test chamber as well as limited open air tests. There were some instability and inconsistency issues in the results that need to be further understood. The application for this device is an early warning system to identify chemical warfare agents and toxic industrial chemicals at long standoff distances.

A companion paper summary is available at: https://www.osapublishing.org/spotlight/summary.cfm?id=444246

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