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- W1986654815 abstract "A periodically poled lithium niobate (PPLN) crystal with multiple poling periods is used to generate tunable narrow-bandwidth THz pulses for injection seeding a quantum cascade laser (QCL). We demonstrate that longitudinal modes of the quantum cascade laser close to the gain maximum can be selected or suppressed according to the seed spectrum. The QCL emission spectra obtained by electro-optic sampling from the quantum cascade laser, in the most favorable case, shows high selectivity and amplification of the longitudinal modes that overlap the frequency of the narrow-band seed. Proper selection of the narrow-band THz seed from the PPLN crystal discretely tunes the longitudinal mode emission of the quantum cascade laser. Moreover, the THz wave build-up within the laser cavity is studied as a function of the round-trip time. When the seed frequency is outside the maximum of the gain spectrum the laser emission shifts to the preferential longitudinal mode." @default.
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- W1986654815 date "2014-09-15" @default.
- W1986654815 modified "2023-10-12" @default.
- W1986654815 title "Narrow-band injection seeding of a terahertz frequency quantum cascade laser: Selection and suppression of longitudinal modes" @default.
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- W1986654815 doi "https://doi.org/10.1063/1.4896032" @default.
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