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4 February 2013 Quantum-limited linewidth in THz quantum cascade lasers
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Quantum cascade lasers (QCLs) are powerful testing grounds for the fundamental physical parameters determined by their quantum nature. The associated wealth of unique physical properties makes the QCL a subject of extensive research, especially across the far-infrared, where the electron-phonon relaxation dynamics, the gain mechanisms and the related intrinsic QCL features need to be extensively investigated. Here, we report a complete overview of the frequency-noise power spectral density of a THz QCL, giving an experimental and analytical evaluation of its intrinsic linewidth and a full investigation of the physics beyond it, offering a new perspective of use of ultra-narrow THz QCL sources as a metrological grade tool for a widespread range of photonic applications.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Miriam Serena Vitiello, Luigi Consolino, Saverio Bartalini, Andrea Taschin, Alessandro Tredicucci, Massimo Inguscio, and Paolo De Natale "Quantum-limited linewidth in THz quantum cascade lasers", Proc. SPIE 8631, Quantum Sensing and Nanophotonic Devices X, 863109 (4 February 2013);


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