Shortwave quantum cascade laser frequency comb for multi-heterodyne spectroscopy

Q. Y. Lu; S. Manna; D. H. Wu; S. Slivken; M. Razeghi

doi:10.1063/1.5020747

Shortwave quantum cascade laser frequency comb for multi-heterodyne spectroscopy

Q. Y. Lu, S. Manna, D. H. Wu, S. Slivken, M. Razeghi

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

28 Scopus citations

Abstract

Quantum cascade lasers (QCLs) are versatile light sources with tailorable emitting wavelengths covering the mid-infrared and terahertz spectral ranges. When the dispersion is minimized, frequency combs can be directly emitted from quantum cascade lasers via four-wave mixing. To date, most of the mid-infrared quantum cascade laser combs are operational in a narrow wavelength range wherein the QCL dispersion is minimal. In this work, we address the issue of very high dispersion for shortwave QCLs and demonstrate 1-W dispersion compensated shortwave QCL frequency combs at λ ∼ 5.0 μm, spanning a spectral range of 100 cm^-1. The multi-heterodyne spectrum exhibits 95 equally spaced frequency comb lines, indicating that the shortwave QCL combs are ideal candidates for high-speed high-resolution spectroscopy.

Original language	English (US)
Article number	141104
Journal	Applied Physics Letters
Volume	112
Issue number	14
DOIs	https://doi.org/10.1063/1.5020747
State	Published - Apr 2 2018

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.5020747

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title = "Shortwave quantum cascade laser frequency comb for multi-heterodyne spectroscopy",

abstract = "Quantum cascade lasers (QCLs) are versatile light sources with tailorable emitting wavelengths covering the mid-infrared and terahertz spectral ranges. When the dispersion is minimized, frequency combs can be directly emitted from quantum cascade lasers via four-wave mixing. To date, most of the mid-infrared quantum cascade laser combs are operational in a narrow wavelength range wherein the QCL dispersion is minimal. In this work, we address the issue of very high dispersion for shortwave QCLs and demonstrate 1-W dispersion compensated shortwave QCL frequency combs at λ ∼ 5.0 μm, spanning a spectral range of 100 cm-1. The multi-heterodyne spectrum exhibits 95 equally spaced frequency comb lines, indicating that the shortwave QCL combs are ideal candidates for high-speed high-resolution spectroscopy.",

author = "Lu, {Q. Y.} and S. Manna and Wu, {D. H.} and S. Slivken and M. Razeghi",

note = "Funding Information: This work was partially supported by the National Science Foundation (Grant Nos. ECCS-1505409 and ECCS-1607838). The published material represents the position of the author(s) and not necessarily that of the National Science Foundation. The authors would also like to acknowledge the encouragement and support of all the involved program managers. Publisher Copyright: {\textcopyright} 2018 Author(s).",

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doi = "10.1063/1.5020747",

language = "English (US)",

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AU - Lu, Q. Y.

AU - Manna, S.

AU - Wu, D. H.

AU - Slivken, S.

AU - Razeghi, M.

N1 - Funding Information: This work was partially supported by the National Science Foundation (Grant Nos. ECCS-1505409 and ECCS-1607838). The published material represents the position of the author(s) and not necessarily that of the National Science Foundation. The authors would also like to acknowledge the encouragement and support of all the involved program managers. Publisher Copyright: © 2018 Author(s).

PY - 2018/4/2

Y1 - 2018/4/2

N2 - Quantum cascade lasers (QCLs) are versatile light sources with tailorable emitting wavelengths covering the mid-infrared and terahertz spectral ranges. When the dispersion is minimized, frequency combs can be directly emitted from quantum cascade lasers via four-wave mixing. To date, most of the mid-infrared quantum cascade laser combs are operational in a narrow wavelength range wherein the QCL dispersion is minimal. In this work, we address the issue of very high dispersion for shortwave QCLs and demonstrate 1-W dispersion compensated shortwave QCL frequency combs at λ ∼ 5.0 μm, spanning a spectral range of 100 cm-1. The multi-heterodyne spectrum exhibits 95 equally spaced frequency comb lines, indicating that the shortwave QCL combs are ideal candidates for high-speed high-resolution spectroscopy.

AB - Quantum cascade lasers (QCLs) are versatile light sources with tailorable emitting wavelengths covering the mid-infrared and terahertz spectral ranges. When the dispersion is minimized, frequency combs can be directly emitted from quantum cascade lasers via four-wave mixing. To date, most of the mid-infrared quantum cascade laser combs are operational in a narrow wavelength range wherein the QCL dispersion is minimal. In this work, we address the issue of very high dispersion for shortwave QCLs and demonstrate 1-W dispersion compensated shortwave QCL frequency combs at λ ∼ 5.0 μm, spanning a spectral range of 100 cm-1. The multi-heterodyne spectrum exhibits 95 equally spaced frequency comb lines, indicating that the shortwave QCL combs are ideal candidates for high-speed high-resolution spectroscopy.

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Shortwave quantum cascade laser frequency comb for multi-heterodyne spectroscopy

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