Fast continuous tuning of terahertz quantum-cascade lasers by rear-facet illumination
- Paul-Drude-Institut für Festkörperelektronik, Leibniz-Institut im Forschungsverbund Berlin e. V., Hausvogteiplatz 5–7, 10117 Berlin (Germany)
- Institute of Optical Sensor Systems, German Aerospace Center (DLR), Rutherfordstr. 2, 12489 Berlin (Germany)
GaAs-based terahertz quantum-cascade lasers (QCLs) are continuously tuned in their emission frequency by illuminating the rear facet with a near-infrared, high-power diode laser. For QCLs emitting around 3.1 THz, the maximum tuning range amounts to 2.8 GHz for continuous-wave operation at a heat sink temperature of 55 K, while in pulsed mode 9.1 and 8.0 GHz are achieved at 35 and 55 K, respectively.
- OSTI ID:
- 22591693
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 19 Vol. 108; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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