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

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

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...

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Veröffentlicht in:Optics letters 2019-02, Vol.44 (3), p.487-490
Hauptverfasser: Morohashi, Isao, Katayama, Ikufumi, Kirigaya, Mayu, Irimajiri, Yoshihisa, Sekine, Norihiko, Hosako, Iwao
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Sprache:eng
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Frequency measurement
Optical fibers
Terahertz frequencies
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container_end_page 490
container_issue 3
container_start_page 487
container_title Optics letters
container_volume 44
creator Morohashi, Isao
Katayama, Ikufumi
Kirigaya, Mayu
Irimajiri, Yoshihisa
Sekine, Norihiko
Hosako, Iwao
description 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.
doi_str_mv 10.1364/ol.44.000487
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subjects Frequency measurement
Optical fibers
Terahertz frequencies
title High precision frequency measurement of terahertz waves using optical combs from a Mach-Zehnder-modulator-based flat comb generator
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