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- W3200796693 abstract "Abstract We report a terahertz quantum cascade laser frequency comb (THz QCL FC) with low threshold current density, high power, and wide current dynamic range. The active region design with the semi-insulated surface plasma waveguide is beneficial to optimize the gain dispersion value and temperature stability. At 10K, the comb with 3-mm-long and 150-µm-wide is capable of emitting 22mW with the threshold current density J th = 64.4 A·cm −2 . The total spectral emission is of about 300 GHz centered around 4.6 THz. Without any extra dispersion compensation measures, the intermode beatnote map reveals stable frequency comb operating within a current dynamic range more than 97% and the narrowest beatnote linewidth is 7.2 kHz. The stable FC operation of a free-running THz QCL makes our device an ideal source for further development of dual-comb spectroscopy." @default.
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- W3200796693 date "2021-09-22" @default.
- W3200796693 modified "2023-10-16" @default.
- W3200796693 title "THz Quantum Cascade Laser Operating Frequency Comb Over Near-full-current Dynamic Range" @default.
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- W3200796693 doi "https://doi.org/10.21203/rs.3.rs-907795/v1" @default.
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