Mid-infrared multi-mode absorption spectroscopy, MUMAS, using difference frequency generation

Journal article

Multi-mode absorption spectroscopy of ammonia and methane at 3.3 μm has been demonstrated using a source of multi-mode mid-infrared radiation based on difference frequency generation. Multi-mode radiation at 1.56 μm from a diode-pumped Er:Yb:glass laser was mixed with a single-mode Nd:YAG laser at 1.06 μm in a periodically poled lithium niobate crystal to produce multi-mode radiation in the region of 3.3 μm. Detection, by direct multi-mode absorption, of NH3 and CH4 is reported for each species individually and also simultaneously in mixtures allowing measurements of partial pressures of each species.

Authors: Northern, H; O Hagan, S; Hamilton, M; Ewart, P

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Springer Berlin Heidelberg
• Journal: Applied Physics B
• Volume: 118
• Issue: 3
• Pages: 343-351
• Publication date: 2015-03-01
• DOI: 10.1007/s00340-014-5989-5
• ISSN: 0946-2171
• Language: English