High precision frequency measurement of terahertz waves using optical combs from a Mach–Zehnder-modulator-based flat comb generator | Zendy

Isao Morohashi | Zendy; Ikufumi Katayama | Zendy; Mayu Kirigaya | Zendy; Yoshihisa Irimajiri | Zendy; Norihiko Sekine | Zendy; Iwao Hosako | Zendy

Open Access

High precision frequency measurement of terahertz waves using optical combs from a Mach–Zehnder-modulator-based flat comb generator

Author(s) -

Isao Morohashi,

Ikufumi Katayama,

Mayu Kirigaya,

Yoshihisa Irimajiri,

Norihiko Sekine,

Iwao Hosako

Publication year - 2019

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.44.000487

Subject(s) - comb generator , optics , terahertz radiation , frequency comb , photomixing , optical frequency comb , beat (acoustics) , electro optic modulator , physics , materials science , phase modulation , optical modulator , laser , far infrared laser , phase noise , terahertz metamaterials

Using a frequency-tunable optical comb generated from a Mach-Zehnder-modulator-based flat comb generator (MZ-FCG) and a nonlinear optical fiber, we demonstrated a frequency measurement of continuous terahertz wave sources with the frequency of 0.1 and 0.6 THz by an electro-optic sampling method. We clearly observed beat signals between the terahertz source and the optical two-tone extracted from the optical comb, allowing us to determine the absolute frequency. Owing to the wide comb spacing of the MZ-FCG, this method has a high potential for the high-speed measurement of the frequency of terahertz wave sources.

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