Mid-infrared laser absorption-based sensors for trace gas detection using difference-frequency generation


Real-time, compact, laser absorption-based sensors for trace gas detection have been developed. Difference-frequency generation in a periodically poled lithium niobate (PPLN) crystal pumped by two compact lasers, a near-infrared diode laser and a monolithic ring Nd:YAG laser, is used as a mid-infrared laser source. Detection of carbon monoxide (CO) and formaldehyde \rm (H\sb2CO) in ppm to sub-ppm level has been performed, based on a direct absorption spectroscopy. The portable sensor designed for monitoring the CO concentration in ambient air was built and operated in the laboratory, in the open air, and a test chamber located at the NASA Johnson Space Center

Similar works

Full text


DSpace at Rice University

Full text is not available
oaioai:scholarship.rice.e...Last time updated on 6/11/2012

This paper was published in DSpace at Rice University.

Having an issue?

Is data on this page outdated, violates copyrights or anything else? Report the problem now and we will take corresponding actions after reviewing your request.