Short wavelength (λ ∼ 4.3 μm) high-performance continuous-wave quantum-cascade lasers

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

doi:10.1109/LPT.2005.846568

Short wavelength (λ ∼ 4.3 μm) high-performance continuous-wave quantum-cascade lasers

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

^*Corresponding author for this work

Electrical and Computer Engineering

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

45 Scopus citations

Abstract

We report continuous-wave (CW) operation of a 4.3-μm quantum-cascade laser from 80 K to 313 K. For a high-reflectivity-coated 11-/μm-wide and 4-mm-long laser, CW output powers of 1.34 W at 80 K and 26 mW at 313 K are achieved. At 298 K, the CW threshold current density of 1.5 kA/ cm² is observed with a CW output power of 166 mW and maximum wall-plug efficiency of 1.47%. The CW emission wavelength varies from 4.15 μm at 80 K to 4.34 μm at 298 K, corresponding to a temperature-tuning rate of 0.87 nm/K. The beam full-width at half-maximum values for the parallel and the perpendicular far-field patterns are 26° and 49° in CW mode, respectively.

Original language	English (US)
Pages (from-to)	1154-1156
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	17
Issue number	6
DOIs	https://doi.org/10.1109/LPT.2005.846568
State	Published - Jun 2005

Funding

Manuscript received November 23, 2004; revised February 14, 2005. This work was supported by Navy Contract N00014-03-1-0003 and by Air Force Contract F49620-03-1-0436. The authors are with the Center for Quantum Devices, Electrical and Computer Engineering Department, Northwestern University, Evanston, IL 60208 USA (e-mail: [email protected]). Digital Object Identifier 10.1109/LPT.2005.846568 Fig. 1. Schematic conduction band diagram with the allowed wave functions for an active region surrounded by two injectors under an applied electric field of 82 kV/cm. Based on the energy difference between the upper and lower lasing levels, the emission wavelength of 4.2 m is estimated at room temperature in pulsed mode.

Keywords

Continuous wave (CW)
High-power operation
Midinfrared
Quantum wells (QWs)
Quantum-cascade lasers (QCLs)

ASJC Scopus subject areas

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

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10.1109/LPT.2005.846568

Cite this

@article{f57bc8e068534431b09310cfd65f8d58,

title = "Short wavelength (λ ∼ 4.3 μm) high-performance continuous-wave quantum-cascade lasers",

abstract = "We report continuous-wave (CW) operation of a 4.3-μm quantum-cascade laser from 80 K to 313 K. For a high-reflectivity-coated 11-/μm-wide and 4-mm-long laser, CW output powers of 1.34 W at 80 K and 26 mW at 313 K are achieved. At 298 K, the CW threshold current density of 1.5 kA/ cm2 is observed with a CW output power of 166 mW and maximum wall-plug efficiency of 1.47%. The CW emission wavelength varies from 4.15 μm at 80 K to 4.34 μm at 298 K, corresponding to a temperature-tuning rate of 0.87 nm/K. The beam full-width at half-maximum values for the parallel and the perpendicular far-field patterns are 26° and 49° in CW mode, respectively.",

keywords = "Continuous wave (CW), High-power operation, Midinfrared, Quantum wells (QWs), Quantum-cascade lasers (QCLs)",

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

note = "Funding Information: Manuscript received November 23, 2004; revised February 14, 2005. This work was supported by Navy Contract N00014-03-1-0003 and by Air Force Contract F49620-03-1-0436. The authors are with the Center for Quantum Devices, Electrical and Computer Engineering Department, Northwestern University, Evanston, IL 60208 USA (e-mail: [email protected]). Digital Object Identifier 10.1109/LPT.2005.846568 Fig. 1. Schematic conduction band diagram with the allowed wave functions for an active region surrounded by two injectors under an applied electric field of 82 kV/cm. Based on the energy difference between the upper and lower lasing levels, the emission wavelength of 4.2 m is estimated at room temperature in pulsed mode.",

year = "2005",

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doi = "10.1109/LPT.2005.846568",

language = "English (US)",

volume = "17",

pages = "1154--1156",

journal = "IEEE Photonics Technology Letters",

issn = "1041-1135",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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T1 - Short wavelength (λ ∼ 4.3 μm) high-performance continuous-wave quantum-cascade lasers

AU - Yu, J. S.

AU - Evans, A.

AU - Slivken, S.

AU - Darvish, S. R.

AU - Razeghi, M.

N1 - Funding Information: Manuscript received November 23, 2004; revised February 14, 2005. This work was supported by Navy Contract N00014-03-1-0003 and by Air Force Contract F49620-03-1-0436. The authors are with the Center for Quantum Devices, Electrical and Computer Engineering Department, Northwestern University, Evanston, IL 60208 USA (e-mail: [email protected]). Digital Object Identifier 10.1109/LPT.2005.846568 Fig. 1. Schematic conduction band diagram with the allowed wave functions for an active region surrounded by two injectors under an applied electric field of 82 kV/cm. Based on the energy difference between the upper and lower lasing levels, the emission wavelength of 4.2 m is estimated at room temperature in pulsed mode.

PY - 2005/6

Y1 - 2005/6

N2 - We report continuous-wave (CW) operation of a 4.3-μm quantum-cascade laser from 80 K to 313 K. For a high-reflectivity-coated 11-/μm-wide and 4-mm-long laser, CW output powers of 1.34 W at 80 K and 26 mW at 313 K are achieved. At 298 K, the CW threshold current density of 1.5 kA/ cm2 is observed with a CW output power of 166 mW and maximum wall-plug efficiency of 1.47%. The CW emission wavelength varies from 4.15 μm at 80 K to 4.34 μm at 298 K, corresponding to a temperature-tuning rate of 0.87 nm/K. The beam full-width at half-maximum values for the parallel and the perpendicular far-field patterns are 26° and 49° in CW mode, respectively.

AB - We report continuous-wave (CW) operation of a 4.3-μm quantum-cascade laser from 80 K to 313 K. For a high-reflectivity-coated 11-/μm-wide and 4-mm-long laser, CW output powers of 1.34 W at 80 K and 26 mW at 313 K are achieved. At 298 K, the CW threshold current density of 1.5 kA/ cm2 is observed with a CW output power of 166 mW and maximum wall-plug efficiency of 1.47%. The CW emission wavelength varies from 4.15 μm at 80 K to 4.34 μm at 298 K, corresponding to a temperature-tuning rate of 0.87 nm/K. The beam full-width at half-maximum values for the parallel and the perpendicular far-field patterns are 26° and 49° in CW mode, respectively.

KW - Continuous wave (CW)

KW - High-power operation

KW - Midinfrared

KW - Quantum wells (QWs)

KW - Quantum-cascade lasers (QCLs)

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Short wavelength (λ ∼ 4.3 μm) high-performance continuous-wave quantum-cascade lasers

Abstract

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Keywords

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