Room-temperature continuous-wave operation of quantum-cascade lasers at λ∼4 μm

J. S. Yu; S. R. Darvish; A. Evans; J. Nguyen; S. Slivken; M. Razeghi

doi:10.1063/1.2167394

Room-temperature continuous-wave operation of quantum-cascade lasers at λ∼4 μm

J. S. Yu^*, S. R. Darvish, A. Evans, J. Nguyen, S. Slivken, M. Razeghi

^*Corresponding author for this work

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

74 Scopus citations

Abstract

High-power cw λ∼4 μm quantum-cascade lasers (QCLs) are demonstrated. The effect of different cavity length and laser die bonding is also investigated. For a high-reflectivity-coated 11-μm -wide and 4-mm -long epilayer-down bonded QCL, cw output powers as high as 1.6 W at 80 K and 160 mW at 298 K are obtained, and the cw operation is achieved up to 313 K with 12 mW. The laser exhibits a threshold current density of 1.96 kA cm2, a slope efficiency of 737 mWA, and a maximum wall-plug efficiency of 0.9% under cw mode at 298 K. In pulsed mode, a maximum average power of 552 mW at 298 K is achieved at 45% duty cycle and a characteristic temperature is 176 K from 80 to 393 K.

Original language	English (US)
Article number	041111
Pages (from-to)	1-3
Number of pages	3
Journal	Applied Physics Letters
Volume	88
Issue number	4
DOIs	https://doi.org/10.1063/1.2167394
State	Published - 2006

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2167394

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@article{31b50543db394b6f82e925bee91922b7,

title = "Room-temperature continuous-wave operation of quantum-cascade lasers at λ∼4 μm",

abstract = "High-power cw λ∼4 μm quantum-cascade lasers (QCLs) are demonstrated. The effect of different cavity length and laser die bonding is also investigated. For a high-reflectivity-coated 11-μm -wide and 4-mm -long epilayer-down bonded QCL, cw output powers as high as 1.6 W at 80 K and 160 mW at 298 K are obtained, and the cw operation is achieved up to 313 K with 12 mW. The laser exhibits a threshold current density of 1.96 kA cm2, a slope efficiency of 737 mWA, and a maximum wall-plug efficiency of 0.9% under cw mode at 298 K. In pulsed mode, a maximum average power of 552 mW at 298 K is achieved at 45% duty cycle and a characteristic temperature is 176 K from 80 to 393 K.",

author = "Yu, {J. S.} and Darvish, {S. R.} and A. Evans and J. Nguyen and S. Slivken and M. Razeghi",

note = "Funding Information: This work is partially funded by the Defense Advanced Research Projects Agency (DARPA), the Air Force Office of Scientific Research (AFOSR), the Office of Naval Research (ONR), and the Army Research Office (ARO). ",

year = "2006",

doi = "10.1063/1.2167394",

language = "English (US)",

volume = "88",

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TY - JOUR

T1 - Room-temperature continuous-wave operation of quantum-cascade lasers at λ∼4 μm

AU - Yu, J. S.

AU - Darvish, S. R.

AU - Evans, A.

AU - Nguyen, J.

AU - Slivken, S.

AU - Razeghi, M.

N1 - Funding Information: This work is partially funded by the Defense Advanced Research Projects Agency (DARPA), the Air Force Office of Scientific Research (AFOSR), the Office of Naval Research (ONR), and the Army Research Office (ARO).

PY - 2006

Y1 - 2006

N2 - High-power cw λ∼4 μm quantum-cascade lasers (QCLs) are demonstrated. The effect of different cavity length and laser die bonding is also investigated. For a high-reflectivity-coated 11-μm -wide and 4-mm -long epilayer-down bonded QCL, cw output powers as high as 1.6 W at 80 K and 160 mW at 298 K are obtained, and the cw operation is achieved up to 313 K with 12 mW. The laser exhibits a threshold current density of 1.96 kA cm2, a slope efficiency of 737 mWA, and a maximum wall-plug efficiency of 0.9% under cw mode at 298 K. In pulsed mode, a maximum average power of 552 mW at 298 K is achieved at 45% duty cycle and a characteristic temperature is 176 K from 80 to 393 K.

AB - High-power cw λ∼4 μm quantum-cascade lasers (QCLs) are demonstrated. The effect of different cavity length and laser die bonding is also investigated. For a high-reflectivity-coated 11-μm -wide and 4-mm -long epilayer-down bonded QCL, cw output powers as high as 1.6 W at 80 K and 160 mW at 298 K are obtained, and the cw operation is achieved up to 313 K with 12 mW. The laser exhibits a threshold current density of 1.96 kA cm2, a slope efficiency of 737 mWA, and a maximum wall-plug efficiency of 0.9% under cw mode at 298 K. In pulsed mode, a maximum average power of 552 mW at 298 K is achieved at 45% duty cycle and a characteristic temperature is 176 K from 80 to 393 K.

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DO - 10.1063/1.2167394

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JO - Applied Physics Letters

JF - Applied Physics Letters

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ER -

Room-temperature continuous-wave operation of quantum-cascade lasers at λ∼4 μm

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