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THz Quantum Cascade Laser Frequency Comb based on a Y-coupled Planarized Waveguide
(2021)2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)Terahertz (THz) quantum cascade lasers (QCLs) can operate as frequency combs [1] and dual combs [2] , making them very appealing for spectroscopy and metrology applications. Recently, Y-split THz QCLs were investigated in the context of tunable single mode operation [3] . Here, we present a Y-coupled double metal planarized waveguide geometry to study broadband phase locking and frequency comb formation.Other Conference Item -
Shifted Wave Interference Fourier Transform Spectroscopy of Harmonic and Fundamental RF Injection-Locked THz Quantum Cascade Laser Frequency Combs
(2021)2021 27th International Semiconductor Laser Conference (ISLC)Shifted Wave Interference Fourier Transform Spectroscopy allows us to reveal the temporal intensity profiles of RF injection-locked fundamental and harmonic comb states of a broadband, multi-stack THz Quantum Cascade Laser. Depending on the injection power and frequency AM and FM modulated emission can be observed.Other Conference Item -
Frequency Comb Operation of a Y-Coupled Planarized THz Quantum Cascade Laser
(2021)2021 27th International Semiconductor Laser Conference (ISLC)We present a Y-coupled planarized double metal waveguide THz quantum cascade laser, featuring frequency comb operation and broadband phase locking of the two arms, as confirmed by characteristic interference patterns measured in the far-field.Other Conference Item