TY - JOUR
T1 - Improved CW operation of quantum cascade lasers with epitaxial-side heat-sinking
AU - Gmachl, Claire
AU - Sergent, A. Michael
AU - Tredicucci, Alessandro
AU - Capasso, Federico
AU - Hutchinson, Albert L.
AU - Sivco, Deborah L.
AU - Baillargeon, James N.
AU - Chu, S. N.George
AU - Cho, Alfred Y.
N1 - Funding Information:
Manuscript received June 24, 1999; revised August 2, 1999. The work was supported in part by DARPA/US Army Research Office under Contract DAAG55-98-C-0050. The authors are with Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974 USA. Publisher Item Identifier S 1041-1135(99)08704-2.
PY - 1999/11
Y1 - 1999/11
N2 - First results on the epilayer-side mounting of quantum cascade (QC) lasers are presented. Operated in continuous-wave (CW) mode, these lasers are superior to substrate-bonded devices. The maximum CW temperature is raised by 20 K (up to 175 K), and, at comparable heat sink temperatures, the performance with respect to threshold current, output power, and slope efficiency is greatly improved for the epilayer-side mounted devices. QC-laser-specific mounting procedures are discussed in this letter, such as the high reflectivity coating of the back-facet and the front-facet cleaving after mounting. Modeling of the temperature distribution inside the QC laser shows a strong temperature gradient within the active waveguide core, which partly explains the still low maximum CW operating temperatures.
AB - First results on the epilayer-side mounting of quantum cascade (QC) lasers are presented. Operated in continuous-wave (CW) mode, these lasers are superior to substrate-bonded devices. The maximum CW temperature is raised by 20 K (up to 175 K), and, at comparable heat sink temperatures, the performance with respect to threshold current, output power, and slope efficiency is greatly improved for the epilayer-side mounted devices. QC-laser-specific mounting procedures are discussed in this letter, such as the high reflectivity coating of the back-facet and the front-facet cleaving after mounting. Modeling of the temperature distribution inside the QC laser shows a strong temperature gradient within the active waveguide core, which partly explains the still low maximum CW operating temperatures.
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U2 - 10.1109/68.803048
DO - 10.1109/68.803048
M3 - Article
AN - SCOPUS:0033221683
VL - 11
SP - 1369
EP - 1371
JO - IEEE Photonics Technology Letters
JF - IEEE Photonics Technology Letters
SN - 1041-1135
IS - 11
ER -