Frequency-agile injection-seeded terahertz-wave parametric generation

Yoshikiyo Moriguchi, Yu Tokizane, Yuma Takida, Kouji Nawata, Shigenori Nagano, Manabu Sato, Taiichi Otsuji, Hiroaki Minamide

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


An injection-seeded terahertz(THz)-wave parametric generator (is-TPG) enables accesstolow-frequencyfingerprints of moleculesinthe THz frequency region. However, its conventional scanrepetition rate(SRR)islimited below1Hz. Thus, in this Letter, we propose an electrically controlled tuning system for the is-TPG, which provides high-speed scanning and random hopping agility. We achieved rapid THz frequency scanning on a pulse-by-pulse basis by employing a gain-switched laser diode and a micro-electromechanical system tunable vertical-cavity surface-emitting laser as the pump and seed lasers. A THz spectrum was acquired with a 10 times higher SRR of 10 Hz for the 1.6-3 THz range with a sampling resolution of 4.6 GHz.

Original languageEnglish
Pages (from-to)77-80
Number of pages4
JournalOptics Letters
Issue number1
Publication statusPublished - 2020 Jan 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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