Search
Results
-
Coherent Broadening and Tuning of QCL Frequency Combs via RF-Injection
(2022)Proceedings of SPIE ~ Quantum Sensing and Nano Electronics and Photonics XVIIIWe present strong radio-frequency current modulation close to their repetition frequency as a means to control the emitted state of quantum cascade laser frequency combs. In particular, more than doubling of the spectral bandwidth compared to free-running can be achieved throughout the dynamical range of the device. By changing the modulation frequency, the spectral bandwidth and center-frequency can be tuned and by fast switching between ...Other Conference Item -
Mid-infrared femtosecond pulses from a quantum cascade laser
(2022)Proceedings of SPIE ~ Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXIIIn recent years, quantum cascade lasers have matured to become compact, powerful sources of coherent mid infrared light. Yet, the ultrafast carrier dynamics in these sources has so far restricted the formation of high intensity ultrashort pulses. In this work, we demonstrate the formation of similar to 630 fs QCL pulses with a peak power of similar to 4.3 W. We break the picosecond barrier in an approach similar to chirped pulse amplification, ...Conference Paper