Room temperature quantum cascade lasers with 22% wall plug efficiency in continuous-wave operation

F. Wang; S. Slivken; D. H. Wu; M. Razeghi

doi:10.1364/OE.394916

Room temperature quantum cascade lasers with 22% wall plug efficiency in continuous-wave operation

F. Wang, S. Slivken, D. H. Wu, M. Razeghi^*

^*Corresponding author for this work

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

25 Scopus citations

Abstract

We report the demonstration of quantum cascade lasers (QCLs) with improved efficiency emitting at a wavelength of 4.9 ∼m in pulsed and continuous-wave (CW) operation. Based on an established design and guided by simulation, the number of QCL-emitting stages is increased in order to realize a 29.3% wall plug efficiency (WPE) in pulsed operation at room temperature. With proper fabrication and packaging, a 5-mm-long, 8-∼m-wide QCL with a buried ridge waveguide is capable of 22% CW WPE and 5.6 W CW output power at room temperature. This corresponds to an extremely high optical density at the output facet of ∼35 MW/cm², without any damage.

Original language	English (US)
Pages (from-to)	17532-17538
Number of pages	7
Journal	Optics Express
Volume	28
Issue number	12
DOIs	https://doi.org/10.1364/OE.394916
State	Published - Jun 8 2020

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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title = "Room temperature quantum cascade lasers with 22% wall plug efficiency in continuous-wave operation",

abstract = "We report the demonstration of quantum cascade lasers (QCLs) with improved efficiency emitting at a wavelength of 4.9 ∼m in pulsed and continuous-wave (CW) operation. Based on an established design and guided by simulation, the number of QCL-emitting stages is increased in order to realize a 29.3% wall plug efficiency (WPE) in pulsed operation at room temperature. With proper fabrication and packaging, a 5-mm-long, 8-∼m-wide QCL with a buried ridge waveguide is capable of 22% CW WPE and 5.6 W CW output power at room temperature. This corresponds to an extremely high optical density at the output facet of ∼35 MW/cm2, without any damage.",

author = "F. Wang and S. Slivken and Wu, {D. H.} and M. Razeghi",

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AU - Wang, F.

AU - Slivken, S.

AU - Wu, D. H.

AU - Razeghi, M.

PY - 2020/6/8

Y1 - 2020/6/8

N2 - We report the demonstration of quantum cascade lasers (QCLs) with improved efficiency emitting at a wavelength of 4.9 ∼m in pulsed and continuous-wave (CW) operation. Based on an established design and guided by simulation, the number of QCL-emitting stages is increased in order to realize a 29.3% wall plug efficiency (WPE) in pulsed operation at room temperature. With proper fabrication and packaging, a 5-mm-long, 8-∼m-wide QCL with a buried ridge waveguide is capable of 22% CW WPE and 5.6 W CW output power at room temperature. This corresponds to an extremely high optical density at the output facet of ∼35 MW/cm2, without any damage.

AB - We report the demonstration of quantum cascade lasers (QCLs) with improved efficiency emitting at a wavelength of 4.9 ∼m in pulsed and continuous-wave (CW) operation. Based on an established design and guided by simulation, the number of QCL-emitting stages is increased in order to realize a 29.3% wall plug efficiency (WPE) in pulsed operation at room temperature. With proper fabrication and packaging, a 5-mm-long, 8-∼m-wide QCL with a buried ridge waveguide is capable of 22% CW WPE and 5.6 W CW output power at room temperature. This corresponds to an extremely high optical density at the output facet of ∼35 MW/cm2, without any damage.

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Room temperature quantum cascade lasers with 22% wall plug efficiency in continuous-wave operation

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