Transient spectroscopy with a current-switched semiconductor diode laser

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Department of Physics, University of Arkansas, Fayetteville, AR 72701, United States [1 ]
不详 [2 ]
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来源：
J Opt B Quant Semiclassical Opt | / 5卷 / 541-545期
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Absorption spectroscopy - Pulse modulation - Spectroscopic analysis;
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摘要：
We describe transient spectroscopic measurements with a current-switched semiconductor diode laser. Following a fast pulse modulation in the injection current of the diode laser, the diode laser frequency is switched by a few hundred MHz and, then, is scanned over 10 GHz range in a short-time evolution (<0.5 μs). Free-induction decay based on the frequency switching and transient absorption spectroscopy of rubidium D1 lines based on the fast frequency-scan are experimentally demonstrated. These fast spectroscopic measurements are accomplished in a single-shot pulse modulation and are, thus, applicable to short-lived samples such as in flowing or combustion systems.
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