Sub-Doppler spectroscopy with an external cavity quantum cascade laser

Sub-Doppler spectroscopy with an external cavity quantum cascade laser

The linewidth of an external cavity quantum cascade laser is studied as a function of injection current and laser scan rate. The laser linewidth is inferred to be ca. 2.5 MHz from Lamb-dip spectra on a low pressure sample of NO and its variation with injection current is well modeled using literatur...

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Veröffentlicht in:Applied physics. B, Lasers and optics Lasers and optics, 2013-08, Vol.112 (2), p.159-167
Hauptverfasser: Walker, R. J., Kirkbride, J., van Helden, J. H., Weidmann, D., Ritchie, G. A. D.
Format: Artikel
Sprache:eng
Schlagworte:
Engineering
Holes
Injection current
Lasers
Lasing
Low pressure
Optical Devices
Optics
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Quantum cascade lasers
Quantum Optics
Spectra
Spectroscopy
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Beschreibung
Zusammenfassung:The linewidth of an external cavity quantum cascade laser is studied as a function of injection current and laser scan rate. The laser linewidth is inferred to be ca. 2.5 MHz from Lamb-dip spectra on a low pressure sample of NO and its variation with injection current is well modeled using literature values for the intrinsic material properties of the lasing medium. The laser linewidth measurements are corroborated by polarization spectroscopy studies as well as by analysis of hyperfine structure and cross-over resonances.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-013-5410-9