Broadband tuning of external cavity bound-to-continuum quantum-cascade lasers

Maulini, Richard; Beck, Mathias; Faist, Jérôme; Gini, Emillo
March 2004
Applied Physics Letters;3/8/2004, Vol. 84 Issue 10, p1659
Academic Journal
A quantum-cascade structure based on a bound-to-continuum design exhibiting a broad gain curve is presented. The full width at half maximum of the measured luminescence spectrum is 297 cm[sup -1] at room temperature. Grating-coupled external cavity lasers using this active region could be tuned over 150 cm[sup -1] (1.45 μm), which is equal to 15% of the free running wavelength (λ≅10 μm), in pulsed mode at room temperature. Time resolved spectra showed a single-mode operation with a 30 dB side mode suppression ratio after the first 12 ns of the pulse. © 2004 American Institute of Physics.


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