Tunable quantum cascade lasers operating in the terahertz frequency range are demonstrated. By using an external cavity based on the reflection from a movable mirror, both broad and fine tuning of the frequency are achieved by varying the cavity length. Coarse tuning up to 3 cm-1 is obtained near the center frequency of 4.8 THz (∼160 cm-1), and continuous mode-hop-free tuning is observed over ∼ 0.4 cm-1, nearly corresponding to the cavity free spectral range.
Tunable terahertz quantum cascade lasers with an external cavity
TREDICUCCI, ALESSANDRO
;
2007
Abstract
Tunable quantum cascade lasers operating in the terahertz frequency range are demonstrated. By using an external cavity based on the reflection from a movable mirror, both broad and fine tuning of the frequency are achieved by varying the cavity length. Coarse tuning up to 3 cm-1 is obtained near the center frequency of 4.8 THz (∼160 cm-1), and continuous mode-hop-free tuning is observed over ∼ 0.4 cm-1, nearly corresponding to the cavity free spectral range.File in questo prodotto:
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