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- W4381490484 abstract "Quantum-cascade-laser (QCL) frequency combs are compact semiconductor light sources operating in the mid-IR and terahertz frequencies. Achieving subpicosecond laser pulses with high peak power is of vital importance for performing nonlinear time-resolved spectroscopy as well for exploring nonlinear phenomena. Therefore, investigation and characterization of time-resolved free-running laser emission is a key for further improvement and optimization of these intersubband devices. In this work, we demonstrate a direct electric field measurement of a free-running terahertz QCL frequency comb using electro-optic sampling in combination with computational phase correction, where we retrieve the electric field profile and access the comb parameters. The demonstrated method is of high interest for time-resolved low-power laser emission characterization, typical for ring terahertz QCL frequency combs and investigation of phase-compensated emission via waveguide dispersion engineering for broadband comb operation." @default.
- W4381490484 created "2023-06-22" @default.
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- W4381490484 date "2023-06-21" @default.
- W4381490484 modified "2023-09-24" @default.
- W4381490484 title "Electro-Optic Sampling of a Free-Running Terahertz Quantum-Cascade-Laser Frequency Comb" @default.
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- W4381490484 doi "https://doi.org/10.1103/physrevapplied.19.064063" @default.
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