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Quantum Cascade Lasers: Controlling and Phase‐Locking a THz Quantum Cascade Laser Frequency Comb by Small Optical Frequency Tuning (Laser Photonics Rev. 15(6)/2021)
Author(s) -
Consolino Luigi,
Campa Annamaria,
De Regis Michele,
Cappelli Francesco,
Scalari Giacomo,
Faist Jérôme,
Beck Mattias,
Rösch Markus,
Bartalini Saverio,
De Natale Paolo
Publication year - 2021
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.202170033
Subject(s) - cascade , laser , photonics , optoelectronics , frequency comb , quantum cascade laser , terahertz radiation , tweaking , optics , semiconductor laser theory , physics , quantum , materials science , quantum mechanics , computer science , chemistry , operating system , chromatography
In article number 2000417, Luigi Consolino and co‐workers demonstrate a novel degree of freedom for controlling the emission of quantum cascade lasers (QCLs). It is based on small optical frequency tuning (SOFT) by means of a white LED. The slightly perturbative regime accessible in these conditions allows tweaking the semiconductor complex refractive index. The resulting additional tuning knob is capable of phase stabilizing the modes spacing of a QCL comb.