Highly Sensitive Spectrometer with 0.78 µm AlGaAs Diode Lasers
- 1 October 1987
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 26 (10A) , L1697-1700
- https://doi.org/10.1143/jjap.26.l1697
Abstract
A reasonably high sensitivity of 3×10-8/cm has been achieved in the near IR spectrometer with AlGaAs diode lasers. Source modulation and Stark modulation techniques are helpful to improve the sensitivity. A successful application to the observation of very weak transitions to the highly excited vibrational states (υN-H=4) of NH3 is demonstrated. All Stark components are resolved and the rotation-vibration transitions are definitely assigned.Keywords
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