NDLI: Thermal characteristics of InP-based mid-infrared quantum cascade lasers at λ ∼ 8.8 µm

Content Provider	Springer Nature Link
Author	Yu, Jae Su Lee, Hee Kwan
Copyright Year	2012
Abstract	We have theoretically investigated the thermal characteristics of double-channel ridge-waveguide InGaAs/AlInAs quantum cascade lasers (QCLs) emitting at λ ∼ 8.8 µm in comparison with the experimental results. Based on the measured data, the thermal parameters were obtained with heat source densities using a two-dimensional anisotropic heat dissipation model. For 21 µm × 4 mm QCLs, the thermal conductance (G $_{ th }$) value was 215.5W/K-cm$^{2}$ at 298 K in continuous-wave (CW) operation. The G $_{ th }$ value was significantly increased by using a buried heterostructure (BH) via the regrowth of undoped InP layer around the laser ridge. Also, an additional improvement in the G $_{ th }$ was made by the use of a diamond submount, and the temperature dependency of the devices was largely decreased. The G $_{ th }$ value was improved to 306.7 W/K-cm$^{2}$ at 298 K in the CW mode for epilayer-down bonded BH QCLs with an InP embedded layer on a diamond submount.
Starting Page	1757
Ending Page	1761
Page Count	5
File Format	PDF
ISSN	03744884
Journal	Journal of the Korean Physical Society
Volume Number	60
Issue Number	10
e-ISSN	19768524
Language	English
Publisher	The Korean Physical Society
Publisher Date	2012-05-27
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Theoretical, Mathematical and Computational Physics Thermal analysis Quantum cascade lasers Particle and Nuclear Physics Physics InGaAs/AlInAs
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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