Chirped laser dispersion spectroscopy using a directly modulated quantum cascade laser
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Date
2013-11-04Type
- Journal Article
Abstract
Chirped laser dispersion spectroscopy (CLaDS) utilizing direct modulation of a quantum cascade laser (QCL) is presented. By controlling the laser bias nearly single- and dual-sideband CLaDS operation can be realized in an extremely simplified optical setup with no external optical modulators. Capability of direct single-sideband modulation is a unique feature of QCLs that exhibit a low linewidth enhancement factor. The developed analytical model shows excellent agreement with the experimental, directly modulated CLaDS spectra. This method overcomes major technical limitations of mid-infrared CLaDS systems by allowing significantly higher modulation frequencies and eliminating optical fringes introduced by external modulators. Show more
Publication status
publishedExternal links
Journal / series
Applied Physics LettersVolume
Pages / Article No.
Publisher
American Institute of PhysicsMore
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