Authors:
Shigeyuki Takagi
1
;
Hirotaka Tanimura
1
;
Tsutomu Kakuno
2
;
Rei Hashimoto
2
;
Kei Kaneko
2
and
Shinji Saito
2
Affiliations:
1
Department of Electrical and Electronics Engineering, School of Engineering, Tokyo University of Technology, 1404-1 Katakura-cho, Hachioji, Tokyo, Japan
;
2
Corporate Manufacturing Engineering Center, Toshiba Corporation, 8 Shinisogo-cho, Isogo, Yokohama, Kanagawa, Japan
Keyword(s):
Quantum Cascade Lasers, QCLs, Surface-emitting QCL, Photonic Crystal, PhC, Static Method, Structure Function, Thermal Resistance, Three-dimensional Simulation.
Abstract:
We analysed the thermal characteristics of a surface-emitting quantum cascade laser (QCL), which is expected to increase output and improve beam quality, on the basis of structural functions and 3D thermal flow simulation. The surface-emitting QCL has a device size of 3 mm x 3 mm and has a photonic crystal for extracting laser light vertically from the QCL. The structural function indicating the heat capacity and thermal resistance of the surface-emitting QCL was measured by the static method, and the total thermal resistance including the mount was about 4.7 K/W. On the other hand, the thermal resistance calculated from the 3D thermal flow simulation of the surface-emitting QCL was 4.55 K/W, showing the results of the two methods to be in good agreement. It was shown that the structural function and the 3D simulation are effective for the thermal analysis of surface-emitting QCLs.