Faculté des sciences

Room temperature, continuous wave operation of distributed feedback quantum cascade lasers with widely spaced operation frequencies

Wittmann, Andreas ; Giovannini, Marcella ; Faist, Jérôme ; Hvozdara, Lubos ; Blaser, Stéphane ; Hofstetter, Daniel ; Gini Emilio

In: Applied Physics Letters, 2006, vol. 89, no. 141116, p. 1-3

Lasing properties of room temperature, continuous wave operated distributed feedback (DFB) quantum cascade lasers are reported. A bound-to-continuum active region was used to generate a broad gain spectrum. As a result, first-order DFB lasers employing different periods allowed us to achieve single mode continuous wave emission at several wavelengths ranging from 7.7 to 8.3 µm at a... More

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    Summary
    Lasing properties of room temperature, continuous wave operated distributed feedback (DFB) quantum cascade lasers are reported. A bound-to-continuum active region was used to generate a broad gain spectrum. As a result, first-order DFB lasers employing different periods allowed us to achieve single mode continuous wave emission at several wavelengths ranging from 7.7 to 8.3 µm at a temperature of +30 °C. The frequency span corresponds to 8% of the center frequency.