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10 March 2020 Picosecond pulses from an actively mode-locked quantum cascade laser (Conference Presentation)
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Abstract
The generation of short pulses with quantum cascade lasers (QCLs) remains challenging to date due to their ultrafast gain dynamics. Here, we report on active mode-locking of mid-infrared QCLs. For the first time we show, that picosecond pulses can be generated also at room-temperature using high-performance QCL material. Mounted epi-up, the QCLs emit a train of pulses as short as a 7ps with an average power of 100mW. The nonlinear autocorrelation shows reveals the famous 8:1 ratio, which proves unambiguously that the QCL operates in the mode-locked regime. This result is further verified using the beatnote spectroscopy technique SWITS.
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Benedikt Schwarz, Johannes Hillbrand, Marco Piccardo, Aaron Maxwell Andrews, Hermann Detz, Harald Schneider, Gottfried Strasser, and Federico Capasso "Picosecond pulses from an actively mode-locked quantum cascade laser (Conference Presentation)", Proc. SPIE 11288, Quantum Sensing and Nano Electronics and Photonics XVII, 112881O (10 March 2020); https://doi.org/10.1117/12.2546465
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