Wavelength selection for quantum cascade lasers by cavity length

Christina Young; Richard Cendejas; Scott S. Howard; Wendy Sanchez-Vaynshteyn; Anthony J. Hoffman; Kale J. Franz; Yu Yao; Boris Mizaikoff; Xiaojun Wang; Jenyu Fan; Claire F. Gmachl

doi:10.1063/1.3093422

Wavelength selection for quantum cascade lasers by cavity length

Christina Young, Richard Cendejas, Scott S. Howard, Wendy Sanchez-Vaynshteyn, Anthony J. Hoffman, Kale J. Franz, Yu Yao, Boris Mizaikoff, Xiaojun Wang, Jenyu Fan, Claire F. Gmachl

Biochemistry, Chemistry, & Physics

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Abstract

A systematic shift in spectral emission wavenumbers in quantum cascade lasers (QCLs) is observed over a variation in cavity lengths from 0.5 to 3 mm resulting in a gain peak shift ranging from 2404 to 2286 cm ^-1. Thereby, a wavelength selection range of 118 cm-1 is provided, which is sufficiently broad for selecting the laser emission across the entire CO ₂absorption band at 2326 cm ^-1 (4.3 μm). In contrast to current QCL wavelength selection techniques, modifying the cavity length is a straightforward postprocessing procedure. Experimental evidence confirms that this frequency shift is due to a change in threshold voltage and applied electric field as a function of cavity length which is in agreement with the theory.

Original language	English
Article number	091109
Journal	Applied Physics Letters
Volume	94
Issue number	9
DOIs	https://doi.org/10.1063/1.3093422
State	Published - 2009

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title = "Wavelength selection for quantum cascade lasers by cavity length",

abstract = "A systematic shift in spectral emission wavenumbers in quantum cascade lasers (QCLs) is observed over a variation in cavity lengths from 0.5 to 3 mm resulting in a gain peak shift ranging from 2404 to 2286 cm -1. Thereby, a wavelength selection range of 118 cm-1 is provided, which is sufficiently broad for selecting the laser emission across the entire CO 2absorption band at 2326 cm -1 (4.3 μm). In contrast to current QCL wavelength selection techniques, modifying the cavity length is a straightforward postprocessing procedure. Experimental evidence confirms that this frequency shift is due to a change in threshold voltage and applied electric field as a function of cavity length which is in agreement with the theory.",

author = "Christina Young and Richard Cendejas and Howard, {Scott S.} and Wendy Sanchez-Vaynshteyn and Hoffman, {Anthony J.} and Franz, {Kale J.} and Yu Yao and Boris Mizaikoff and Xiaojun Wang and Jenyu Fan and Gmachl, {Claire F.}",

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doi = "10.1063/1.3093422",

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T1 - Wavelength selection for quantum cascade lasers by cavity length

AU - Young, Christina

AU - Cendejas, Richard

AU - Howard, Scott S.

AU - Sanchez-Vaynshteyn, Wendy

AU - Hoffman, Anthony J.

AU - Franz, Kale J.

AU - Yao, Yu

AU - Mizaikoff, Boris

AU - Wang, Xiaojun

AU - Fan, Jenyu

AU - Gmachl, Claire F.

PY - 2009

Y1 - 2009

N2 - A systematic shift in spectral emission wavenumbers in quantum cascade lasers (QCLs) is observed over a variation in cavity lengths from 0.5 to 3 mm resulting in a gain peak shift ranging from 2404 to 2286 cm -1. Thereby, a wavelength selection range of 118 cm-1 is provided, which is sufficiently broad for selecting the laser emission across the entire CO 2absorption band at 2326 cm -1 (4.3 μm). In contrast to current QCL wavelength selection techniques, modifying the cavity length is a straightforward postprocessing procedure. Experimental evidence confirms that this frequency shift is due to a change in threshold voltage and applied electric field as a function of cavity length which is in agreement with the theory.

AB - A systematic shift in spectral emission wavenumbers in quantum cascade lasers (QCLs) is observed over a variation in cavity lengths from 0.5 to 3 mm resulting in a gain peak shift ranging from 2404 to 2286 cm -1. Thereby, a wavelength selection range of 118 cm-1 is provided, which is sufficiently broad for selecting the laser emission across the entire CO 2absorption band at 2326 cm -1 (4.3 μm). In contrast to current QCL wavelength selection techniques, modifying the cavity length is a straightforward postprocessing procedure. Experimental evidence confirms that this frequency shift is due to a change in threshold voltage and applied electric field as a function of cavity length which is in agreement with the theory.

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DO - 10.1063/1.3093422

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SN - 0003-6951

VL - 94

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 9

M1 - 091109

ER -

Wavelength selection for quantum cascade lasers by cavity length

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