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

Research output: Contribution to journalArticle

11 Citations (Scopus)

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 languageEnglish (US)
Article number091109
JournalApplied Physics Letters
Volume94
Issue number9
DOIs
StatePublished - 2009
Externally publishedYes

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quantum cascade lasers
cavities
wavelengths
spectral emission
shift
threshold voltage
frequency shift
electric fields
lasers

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Young, C., Cendejas, R., Howard, S. S., Sanchez-Vaynshteyn, W., Hoffman, A. J., Franz, K. J., ... Gmachl, C. F. (2009). Wavelength selection for quantum cascade lasers by cavity length. Applied Physics Letters, 94(9), [091109]. https://doi.org/10.1063/1.3093422

Wavelength selection for quantum cascade lasers by cavity length. / Young, Christina; Cendejas, Richard; Howard, Scott S.; Sanchez-Vaynshteyn, Wendy; Hoffman, Anthony J.; Franz, Kale J.; Yao, Yu; Mizaikoff, Boris; Wang, Xiaojun; Fan, Jenyu; Gmachl, Claire F.

In: Applied Physics Letters, Vol. 94, No. 9, 091109, 2009.

Research output: Contribution to journalArticle

Young, C, Cendejas, R, Howard, SS, Sanchez-Vaynshteyn, W, Hoffman, AJ, Franz, KJ, Yao, Y, Mizaikoff, B, Wang, X, Fan, J & Gmachl, CF 2009, 'Wavelength selection for quantum cascade lasers by cavity length', Applied Physics Letters, vol. 94, no. 9, 091109. https://doi.org/10.1063/1.3093422
Young C, Cendejas R, Howard SS, Sanchez-Vaynshteyn W, Hoffman AJ, Franz KJ et al. Wavelength selection for quantum cascade lasers by cavity length. Applied Physics Letters. 2009;94(9). 091109. https://doi.org/10.1063/1.3093422
Young, Christina ; Cendejas, Richard ; Howard, Scott S. ; Sanchez-Vaynshteyn, Wendy ; Hoffman, Anthony J. ; Franz, Kale J. ; Yao, Yu ; Mizaikoff, Boris ; Wang, Xiaojun ; Fan, Jenyu ; Gmachl, Claire F. / Wavelength selection for quantum cascade lasers by cavity length. In: Applied Physics Letters. 2009 ; Vol. 94, No. 9.
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