Abstract
Current tunable semiconductor lasers of Pb1−xSnxTe have been used to investigate the ir spectrum of sulfur dioxide at high resolution near 1130 cm−1. The diode lasers emit radiation in a line of width <10−5 cm−1 thus providing much higher resolution than has been possible with the best grating spectrometer. The effects of self-broadening and broadening by nitrogen to a pressure of 760 Torr are presented, and some characteristics of the laser source such as stability and reproducibility are discussed.
© 1972 Optical Society of America
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