Recent advances in lead-chalcogenide diode lasers |
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Authors: | H Preier |
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Institution: | 1. AEG-Telefunken-Forschungsinstitut, Goldsteinstra?e 235, D-6000, Frankfurt/M. 71, Fed. Rep. Germany
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Abstract: | The fundamental material properties of Pb1−xSnxTe, PbS1−xSex and Pb1−xSnxSe are reviewed. Expressions for the temperature and compositional dependences of the band parameters and dielectric constants
based on recently published data are presented. As far as device technology is concerned, crystal growth techniques and diode
fabrication procedures which are in use today are reviewed and compared. A comprehensive summary of laser properties like
threshold current density, output power, efficiency, maximum operating temperature and tuning range of different diode structures
are presented. Application related aspects such as long term stability are treated. Recent progress in laser theory is applied
to explain experimentali
th
vs.T curves. The various laser applications are reviewed briefly. A new technique for monitoring gas concentrations using pulsed
lasers and an integral method for signal processing is discussed and compared with the differential absorption, derivative
spectroscopy. A long-path trace-gas monitoring system incorporating this new technique is presented. |
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Keywords: | 42 55 Px 07 65 Gj |
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