Infrared Spectroscopy Using Stimulated Emission Techniques Patel, C. K. ; Bennett, W. R. ; Faust, W. L. ; McFarlane, R. A. Abstract Publication: Physical Review Letters Pub Date: August 1962 DOI: 10.1103/PhysRevLett.9.102 Bibcode: 1962PhRvL...9..102P