Improved CW operation of quantum cascade lasers with epitaxial-side heat-sinking

Claire Gmachl; A. Michael Sergent; Alessandro Tredicucci; Federico Capasso; Albert L. Hutchinson; Deborah L. Sivco; James N. Baillargeon; S. N.George Chu; Alfred Y. Cho

doi:10.1109/68.803048

Improved CW operation of quantum cascade lasers with epitaxial-side heat-sinking

Claire Gmachl, A. Michael Sergent, Alessandro Tredicucci, Federico Capasso, Albert L. Hutchinson, Deborah L. Sivco, James N. Baillargeon, S. N.George Chu, Alfred Y. Cho

Research output: Contribution to journal › Article

97 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	1369-1371
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	11
Issue number	11
DOIs	https://doi.org/10.1109/68.803048
State	Published - Nov 1 1999
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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Gmachl, C., Sergent, A. M., Tredicucci, A., Capasso, F., Hutchinson, A. L., Sivco, D. L., Baillargeon, J. N., Chu, S. N. G., & Cho, A. Y. (1999). Improved CW operation of quantum cascade lasers with epitaxial-side heat-sinking. IEEE Photonics Technology Letters, 11(11), 1369-1371. https://doi.org/10.1109/68.803048

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abstract = "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.",

author = "Claire Gmachl and Sergent, {A. Michael} and Alessandro Tredicucci and Federico Capasso and Hutchinson, {Albert L.} and Sivco, {Deborah L.} and Baillargeon, {James N.} and Chu, {S. N.George} and Cho, {Alfred Y.}",

year = "1999",

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Improved CW operation of quantum cascade lasers with epitaxial-side heat-sinking. / Gmachl, Claire; Sergent, A. Michael; Tredicucci, Alessandro; Capasso, Federico; Hutchinson, Albert L.; Sivco, Deborah L.; Baillargeon, James N.; Chu, S. N.George; Cho, Alfred Y.

In: IEEE Photonics Technology Letters, Vol. 11, No. 11, 01.11.1999, p. 1369-1371.

Research output: Contribution to journal › Article

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.

PY - 1999/11/1

Y1 - 1999/11/1

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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