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Linewidth measurement of external grating cavity quantum cascade laser using saturation spectroscopy

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3 Author(s)
Mukherjee, Nandini ; Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA ; Go, Rowel ; Kumar N.Patel, C.

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A room temperature external grating cavity (EGC) quantum cascade laser (QCL) is characterized using saturation spectroscopy of NO2. The presence of two strong EGC QCL waveguide modes is evident from the saturation spectra. A linewidth of 21 MHz for each EGC-QCL mode is measured from the width of the saturation peak at 10 mTorr pressure of NO2.

Published in:

Applied Physics Letters  (Volume:92 ,  Issue: 11 )

Date of Publication:

Mar 2008

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