Presentation Information

11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[9a-C213-8]Development of a Stabilized Microcomb-Based THz Source for Low-Phase-Noise 300-GHz Resonant Tunneling Diodes

〇Ryota Shikata¹, Miezel Talara², Masayuki Higaki¹, Safumi Suzuki³, Yu Tokizane², Naoya Kuse², Takeshi Yasui² (1.Grad. Sch. Sci. Tech. Innov., Tokushima Univ., 2.pLED, Tokushima Univ., 3.Inst. Sci. Tokyo)

Keywords:

Micro optical comb,THz,Resonant tunneling diode

Terahertz (THz) waves are expected to play a crucial role in next-generation technologies, including sixth-generation (6G) wireless communications. Practical applications require THz sources with narrow linewidth and low phase noise. Resonant tunneling diodes (RTDs) are promising THz oscillators because of their compact size, room-temperature operation, and high-frequency performance; however, their broad linewidth limits their use in high-precision applications. In this study, the repetition frequency (frep) of a microcomb was stabilized by feeding back a phase-error signal obtained from a two-wavelength delayed self-heterodyne interferometer to the pump laser frequency. The generated THz signal achieved a relative phase noise of −85 dBc/Hz at a 10 kHz offset frequency. Future work will focus on RTD injection locking for realizing highly stable, low-phase-noise THz sources in the 300 GHz band.

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