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

作者：Northern Henry; O'Hagan Seamus; Hamilton Michelle L; Ewart Paul^*

来源：Applied Physics B: Lasers and Optics , 2015, 118(3): 343-351.

DOI：10.1007/s00340-014-5989-5

Multi-mode absorption spectroscopy of ammonia and methane at 3.3 mu m has been demonstrated using a source of multi-mode mid-infrared radiation based on difference frequency generation. Multi-mode radiation at 1.56 mu m from a diode-pumped Er:Yb:glass laser was mixed with a single-mode Nd:YAG laser at 1.06 mu m in a periodically poled lithium niobate crystal to produce multi-mode radiation in the region of 3.3 mu m. 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.

• 出版日期2015-3