Terahertz Gas Spectroscopy based on External Optical Feedback in a Quantum-Cascade Laser
作者： Martin Wienold , Lutz Schrottke , Till Hagelschuer , Klaus Biermann , H.-W. Hübers
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摘要: We demonstrate the feasibility of high-resolution terahertz gas spectroscopy based on external optical feedback effect in a quantum-cascade laser. Tuning frequency laser across molecular absorption line CH3OH leads to reduction feedback, which can be detected by monitoring voltage
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