Quantum-cascade lasers operating in continuous-wave mode above 90 °c at λ∼5.25 μm

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

doi:10.1063/1.2171476

Quantum-cascade lasers operating in continuous-wave mode above 90 °c at λ∼5.25 μm

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

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

72 Citations (Scopus)

Abstract

We report on the design and fabrication of λ∼5.25 μm quantum-cascade lasers (QCLs) for very high temperature continuous-wave (cw) operation. Cw operation is reported up to a maximum temperature of 90 °C (363 K). Cw output power is reported in excess of 500 mW near room temperature with a low threshold current density of 1.4 kA cm2 at 298 K. Room temperature average power of over 540 mW is reported at 50% duty cycle. A high thermal conductance (Gth) of 340 WK cm2 is reported for cw QCLs. A finite element thermal model is used to investigate the Gth and maximum cw operating temperature of the QCLs.

Original language	English
Article number	051105
Pages (from-to)	1-3
Number of pages	3
Journal	Applied Physics Letters
Volume	88
Issue number	5
DOIs	https://doi.org/10.1063/1.2171476
Publication status	Published - 2006

Bibliographical note

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

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title = "Quantum-cascade lasers operating in continuous-wave mode above 90 °c at λ∼5.25 μm",

abstract = "We report on the design and fabrication of λ∼5.25 μm quantum-cascade lasers (QCLs) for very high temperature continuous-wave (cw) operation. Cw operation is reported up to a maximum temperature of 90 °C (363 K). Cw output power is reported in excess of 500 mW near room temperature with a low threshold current density of 1.4 kA cm2 at 298 K. Room temperature average power of over 540 mW is reported at 50\% duty cycle. A high thermal conductance (Gth) of 340 WK cm2 is reported for cw QCLs. A finite element thermal model is used to investigate the Gth and maximum cw operating temperature of the QCLs.",

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

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doi = "10.1063/1.2171476",

language = "English",

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T1 - Quantum-cascade lasers operating in continuous-wave mode above 90 °c at λ∼5.25 μm

AU - Evans, A.

AU - Nguyen, J.

AU - Slivken, S.

AU - Yu, J. S.

AU - Darvish, S. R.

AU - Razeghi, M.

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

PY - 2006

Y1 - 2006

N2 - We report on the design and fabrication of λ∼5.25 μm quantum-cascade lasers (QCLs) for very high temperature continuous-wave (cw) operation. Cw operation is reported up to a maximum temperature of 90 °C (363 K). Cw output power is reported in excess of 500 mW near room temperature with a low threshold current density of 1.4 kA cm2 at 298 K. Room temperature average power of over 540 mW is reported at 50% duty cycle. A high thermal conductance (Gth) of 340 WK cm2 is reported for cw QCLs. A finite element thermal model is used to investigate the Gth and maximum cw operating temperature of the QCLs.

AB - We report on the design and fabrication of λ∼5.25 μm quantum-cascade lasers (QCLs) for very high temperature continuous-wave (cw) operation. Cw operation is reported up to a maximum temperature of 90 °C (363 K). Cw output power is reported in excess of 500 mW near room temperature with a low threshold current density of 1.4 kA cm2 at 298 K. Room temperature average power of over 540 mW is reported at 50% duty cycle. A high thermal conductance (Gth) of 340 WK cm2 is reported for cw QCLs. A finite element thermal model is used to investigate the Gth and maximum cw operating temperature of the QCLs.

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DO - 10.1063/1.2171476

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 5

M1 - 051105

ER -

Quantum-cascade lasers operating in continuous-wave mode above 90 °c at λ∼5.25 μm

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