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2018•elib (German Aerospace Center)Open access

Molecular spectroscopy by illumination-induced frequency tuning of a terahertz quantum-cascade laser

Mohammad Tasmim Alam, Martin Wienold, L. Schrottke, H. T. Grahn, Heinz‐Wilhelm Hübers

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Abstract

We report on molecular spectroscopy with a terahertz quantum-cascade laser (QCL). The frequency of the QCL is tuned by illuminating its facet using a near-infrared laser. A tuning range of 3.35 GHz is achieved for continuous-wave operation.

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What this paper is about

We report on molecular spectroscopy with a terahertz quantum-cascade laser (QCL). The frequency of the QCL is tuned by illuminating its facet using a near-infrared laser. A tuning range of 3.35 GHz is achieved for continuous-wave operation.

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Available abstract

We report on molecular spectroscopy with a terahertz quantum-cascade laser (QCL). The frequency of the QCL is tuned by illuminating its facet using a near-infrared laser. A tuning range of 3.35 GHz is achieved for continuous-wave operation.

Key concepts: Quantum cascade laser, Terahertz radiation, Cascade, Far-infrared laser, Photomixing, Spectroscopy, Laser, Optics

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