title: Compact and stable THz vector spectroscopy using silicon photonics technology.
abstract: We present a compact and stable terahertz (THz) vector spectroscopy system using silicon photonics technology. A silicon-based integrated phase control circuit greatly reduces the physical size of the continuous-wave THz spectroscopy system and enhances environmental phase stability. Differential lightwave phase control using two carrier-injection electro-optic modulators enables fast and linear phase sweeps of THz-waves. Using the silicon-photonic circuit, we demonstrate a THz vector spectrometer; the dynamic ranges are 65 and 35 dB at 300 GHz and 1 THz with 1-ms integration time and phase variation is less than ± 10° without thermal packaging.
authors.forename: Jae-Young
authors.initials: JY
authors.lastname: Kim
authors.forename: Hidetaka
authors.initials: H
authors.lastname: Nishi
authors.forename: Ho-Jin
authors.initials: HJ
authors.lastname: Song
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Fukuda
authors.forename: Makoto
authors.initials: M
authors.lastname: Yaita
authors.forename: Akihiko
authors.initials: A
authors.lastname: Hirata
authors.forename: Katsuhiro
authors.initials: K
authors.lastname: Ajito