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Temperature dependence of the frequency noise in a mid-IR DFB quantum cascade laser from cryogenic to room temperature
Auteur(s)
Date de parution
2012
In
Optics Express, Optical Society of America (OSA), 2012/20/7/6851-6859
Résumé
We report on the measurement of the frequency noise power spectral density in a distributed feedback quantum cascade laser over a wide temperature range, from 128 K to 303 K. As a function of the device temperature, we show that the frequency noise behavior is characterized by two different regimes separated by a steep transition at ≈200 K. While the frequency noise is nearly unchanged ~200 K, it drastically increases at lower temperature with an exponential dependence. We also show that this increase is entirely induced by current noise intrinsic to the device. In contrast to earlier publications, a single laser is used here in a wide temperature range allowing the direct assessment of the temperature dependence of the frequency noise.
Identifiants
Type de publication
journal article
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