1 February 1972 A Tunable Semiconductor Laser for Pollution Studies
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Tunable semiconductor lasers have been utilized for detecting and measuring atmospheric pollutants. By adjusting the stoichiometry of the junction, one can fabricate diodes that oscillate in desired wavelength ranges. Experiments have shown that it is possible to use such lasers to detect typical pollutants, in concentrations ranging from parts per million to parts per billion, by measuring the infrared absorption spectrum of a sample.
F. L. McNamara, F. L. McNamara, } "A Tunable Semiconductor Laser for Pollution Studies," Optical Engineering 11(1), 110109 (1 February 1972). https://doi.org/10.1117/12.7971592 . Submission:

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