High performance "continuum-to-continuum" quantum cascade lasers with a broad gain bandwidth of over 400 cm-1

Yu Yao; Xiaojun Wang; Jen Yu Fan; Claire F. Gmachl

doi:10.1063/1.3484279

High performance "continuum-to-continuum" quantum cascade lasers with a broad gain bandwidth of over 400 cm^-1

Yu Yao, Xiaojun Wang, Jen Yu Fan, Claire F. Gmachl

Research output: Contribution to journal › Article › peer-review

69 Scopus citations

Abstract

A quantum cascade laser structure is demonstrated that provides a broadband gain spectrum of 430 cm^-1 with a peak emission wavelength around 4.8 μm. The laser active region is based on multiple transitions from strongly coupled upper states to lower laser states. In spite of the broad gain spectrum, high laser performance was demonstrated with low threshold current density (as low as 1.6 kA/ cm²), large slope efficiency (over 5 W/A) and high wall plug efficiency (up to 23%) in pulsed mode operation at 295 K.

Original language	English (US)
Article number	081115
Journal	Applied Physics Letters
Volume	97
Issue number	8
DOIs	https://doi.org/10.1063/1.3484279
State	Published - Aug 23 2010
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3484279

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@article{68dd84de9e7d466b8125d2099b2fb510,

title = "High performance {"}continuum-to-continuum{"} quantum cascade lasers with a broad gain bandwidth of over 400 cm-1",

abstract = "A quantum cascade laser structure is demonstrated that provides a broadband gain spectrum of 430 cm-1 with a peak emission wavelength around 4.8 μm. The laser active region is based on multiple transitions from strongly coupled upper states to lower laser states. In spite of the broad gain spectrum, high laser performance was demonstrated with low threshold current density (as low as 1.6 kA/ cm2), large slope efficiency (over 5 W/A) and high wall plug efficiency (up to 23%) in pulsed mode operation at 295 K.",

author = "Yu Yao and Xiaojun Wang and Fan, {Jen Yu} and Gmachl, {Claire F.}",

note = "Funding Information: This work is supported in part by MIRTHE (Grant No. NSF-ERC EEC-0540832) and DARPA EMIL (Grant No. FA8650–07–1–7708). Copyright: Copyright 2010 Elsevier B.V., All rights reserved.",

year = "2010",

month = aug,

day = "23",

doi = "10.1063/1.3484279",

language = "English (US)",

volume = "97",

journal = "Applied Physics Letters",

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T1 - High performance "continuum-to-continuum" quantum cascade lasers with a broad gain bandwidth of over 400 cm-1

AU - Yao, Yu

AU - Wang, Xiaojun

AU - Fan, Jen Yu

AU - Gmachl, Claire F.

N1 - Funding Information: This work is supported in part by MIRTHE (Grant No. NSF-ERC EEC-0540832) and DARPA EMIL (Grant No. FA8650–07–1–7708). Copyright: Copyright 2010 Elsevier B.V., All rights reserved.

PY - 2010/8/23

Y1 - 2010/8/23

N2 - A quantum cascade laser structure is demonstrated that provides a broadband gain spectrum of 430 cm-1 with a peak emission wavelength around 4.8 μm. The laser active region is based on multiple transitions from strongly coupled upper states to lower laser states. In spite of the broad gain spectrum, high laser performance was demonstrated with low threshold current density (as low as 1.6 kA/ cm2), large slope efficiency (over 5 W/A) and high wall plug efficiency (up to 23%) in pulsed mode operation at 295 K.

AB - A quantum cascade laser structure is demonstrated that provides a broadband gain spectrum of 430 cm-1 with a peak emission wavelength around 4.8 μm. The laser active region is based on multiple transitions from strongly coupled upper states to lower laser states. In spite of the broad gain spectrum, high laser performance was demonstrated with low threshold current density (as low as 1.6 kA/ cm2), large slope efficiency (over 5 W/A) and high wall plug efficiency (up to 23%) in pulsed mode operation at 295 K.

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 8

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ER -

High performance "continuum-to-continuum" quantum cascade lasers with a broad gain bandwidth of over 400 cm^-1

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