Abstract
Quantum cascade lasers (QCLs) are essential components for mid-infrared optical spectroscopy. Currently, widely tunable QCLs are using an external diffraction grating to tune the laser wavelength. In this paper we present a compact tunable QCL that is thermally tuned by a distributed Bragg reflector (DBR) implemented on a Germanium-on-SOI (Ge-on-SOI) waveguide circuit. The 5.1x μm wavelength laser, operating in pulsed mode at room temperature, is continuously tuned over 50 nm.
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Schedule a callMore From: IEEE journal of selected topics in quantum electronics : a publication of the IEEE Lasers and Electro-optics Society
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