Mode switching in a multi-wavelength distributed feedback quantum cascade laser using an external micro-cavity
Autor: | Tobias S. Mansuripur, Jérôme Faist, Jae-Hyun Ryou, C. Y. Wang, Pauline Métivier, Russell D. Dupuis, Yong Huang, Romain Blanchard, Federico Capasso, Meinrad Sidler, Patrick Rauter |
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Rok vydání: | 2014 |
Předmět: | |
Zdroj: | Applied Physics Letters. 104:051102 |
ISSN: | 1077-3118 0003-6951 |
Popis: | We demonstrate a multi-wavelength distributed feedback (DFB) quantum cascade laser (QCL) operating in a lensless external micro-cavity and achieve switchable single-mode emission at three distinct wavelengths selected by the DFB grating, each with a side-mode suppression ratio larger than 30 dB. Discrete wavelength tuning is achieved by modulating the feedback experienced by each mode of the multi-wavelength DFB QCL, resulting from a variation of the external cavity length. This method also provides a post-fabrication control of the lasing modes to correct for fabrication inhomogeneities, in particular, related to the cleaved facets position. |
Databáze: | OpenAIRE |
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