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Proceedings Paper

Picosecond pulses from an actively mode-locked quantum cascade laser (Conference Presentation)
Author(s): Benedikt Schwarz; Johannes Hillbrand; Marco Piccardo; Aaron Maxwell Andrews; Hermann Detz; Harald Schneider; Gottfried Strasser; Federico Capasso

Paper 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.

Paper Details

Date Published: 10 March 2020
Proc. SPIE 11288, Quantum Sensing and Nano Electronics and Photonics XVII, 112881O (10 March 2020); doi: 10.1117/12.2546465
Show Author Affiliations
Benedikt Schwarz, Technische Univ. Wien (Austria)
Johannes Hillbrand, Technische Univ. Wien (Austria)
Marco Piccardo, Harvard Univ. (United States)
Aaron Maxwell Andrews, Technische Univ. Wien (Austria)
Hermann Detz, Technische Univ. Wien (Austria)
Harald Schneider, Helmholtz-Zentrum Dresden-Rossendorf e. V. (Germany)
Gottfried Strasser, Technische Univ. Wien (Austria)
Federico Capasso, Harvard Univ. (United States)

Published in SPIE Proceedings Vol. 11288:
Quantum Sensing and Nano Electronics and Photonics XVII
Manijeh Razeghi; Jay S. Lewis; Giti A. Khodaparast; Pedram Khalili, Editor(s)

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