Spatial Hole Burning in Actively Mode-Locked Quantum Cascade Lasers

Gkortsas, Vasileios-Marios; Gordon, Ariel; Jirauschek, Christian; Wang, C.; Kuznetsova, Lyuba; Diehl, Laurent; Belkin, Mikhail; Belyanin, Alexey; Capasso, Federico; Kärtner, Franz X.

doi:10.1364/cleo.2009.cthl6

Cited by 1 publication

(1 citation statement)

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“…In multi-mode QCLs with Fabry-Perot cavities, the waves travelling in forward and backward directions are coupled as they share the same gain medium, which gives rise to spatial hole burning (SHB) that favors multi-mode emission and can help to further reduce the pulse duration of the short pulses in QCLs. However, on the other hand, SHB also results in pulse instabilities and non-stationary pulse generation [38]. Furthermore, it has been concluded that the combined effects of SHB, GVD and Kerr nonlinearities due to asymmetric gain give rise to the recently observed linear frequency chirp [39].…”

Section: Ultrafast Dynamics Of Qclsmentioning

confidence: 99%

Ultrafast Pulse Generation from Quantum Cascade Lasers

Wang

Chen

et al. 2022

Micromachines

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Quantum cascade lasers (QCLs) have broken the spectral barriers of semiconductor lasers and enabled a range of applications in the mid-infrared (MIR) and terahertz (THz) regimes. However, until recently, generating ultrashort and intense pulses from QCLs has been difficult. This would be useful to study ultrafast processes in MIR and THz using the targeted wavelength-by-design properties of QCLs. Since the first demonstration in 2009, mode-locking of QCLs has undergone considerable development in the past decade, which includes revealing the underlying mechanism of pulse formation, the development of an ultrafast THz detection technique, and the invention of novel pulse compression technology, etc. Here, we review the history and recent progress of ultrafast pulse generation from QCLs in both the THz and MIR regimes.

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Section: Ultrafast Dynamics Of Qclsmentioning

confidence: 99%