Frequency measurement of THz waves by electro-optic sampling using Mach-Zehnder-modulator-based flat comb generator

Isao Morohashi, Mayu Kirigaya, Yuta Kaneko, Ikufumi Katayama, Takahide Sakamoto, Norihiko Sekine, Akifumi Kasamatsu, Iwao Hosako

Abstract

In the recent progress in terahertz (THz) devices, various kinds of source devices, such as resonant tunneling diodes, quantum cascade lasers and so forth, have been developed. Frequency measurement of THz radiations, which can operate in high speed and at room-temperature, is important for development of high-performance THz source devices. Recently, frequency measurement using optical combs are demonstrated by several groups. In these techniques, modelocked lasers (MLLs) are used for optical comb source, so that phase-locking techniques are required in order to stabilize the repetition frequency of the MLLs. On the other hand, a modulator-based optical comb generator has high accuracy and stability in the comb spacing, which is comparable to that of microwave signal driving the modulator. Thus it is suitable for frequency measurement of THz waves. In this paper, we demonstrated frequency measurement of THz waves using a Mach-Zehnder-modulator-based flat comb generator (MZ-FCG). The frequency measurement was carried out by an electro-optic (EO) sampling method, where an optical two-tone signal extracted from the optical comb generated by the MZ-FCG was used for the probe light. A 100 GHz signal generated by a W-band frequency multiplier and the probe beam collinearly traveled through an EO crystal, and beat signals between them were measured by a combination of a balanced photodetector and a spectrum analyzer. As a result, frequency measurement of the 100 GHz wave was successfully demonstrated, in which the linewidth of the beat signal was less than 1 Hz.

Original languageEnglish
Title of host publicationTerahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX
PublisherSPIE
Volume9747
ISBN (Electronic)9781628419825
DOIs
StatePublished - 2016
EventTerahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX - San Francisco, United States

Other

OtherTerahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX
CountryUnited States
CitySan Francisco
Period16/2/1516/2/18

Fingerprint

Modulators
Terahertz waves
Electrooptical effects
Mach number
Sampling
Lasers
Frequency multiplying circuits
Resonant tunneling diodes
Quantum cascade lasers
Spectrum analyzers
Photodetectors
Linewidth
Microwaves
Radiation
Crystals
Temperature

Keywords

  • electro-optic sampling
  • optical comb
  • Terahertz wave

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

Morohashi, I., Kirigaya, M., Kaneko, Y., Katayama, I., Sakamoto, T., Sekine, N., ... Hosako, I. (2016). Frequency measurement of THz waves by electro-optic sampling using Mach-Zehnder-modulator-based flat comb generator. In Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX. (Vol. 9747). [97470U] SPIE. DOI: 10.1117/12.2212541

Frequency measurement of THz waves by electro-optic sampling using Mach-Zehnder-modulator-based flat comb generator. / Morohashi, Isao; Kirigaya, Mayu; Kaneko, Yuta; Katayama, Ikufumi; Sakamoto, Takahide; Sekine, Norihiko; Kasamatsu, Akifumi; Hosako, Iwao.

Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX. Vol. 9747 SPIE, 2016. 97470U.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Morohashi, I, Kirigaya, M, Kaneko, Y, Katayama, I, Sakamoto, T, Sekine, N, Kasamatsu, A & Hosako, I 2016, Frequency measurement of THz waves by electro-optic sampling using Mach-Zehnder-modulator-based flat comb generator. in Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX. vol. 9747, 97470U, SPIE, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX, San Francisco, United States, 15-18 February. DOI: 10.1117/12.2212541
Morohashi I, Kirigaya M, Kaneko Y, Katayama I, Sakamoto T, Sekine N et al. Frequency measurement of THz waves by electro-optic sampling using Mach-Zehnder-modulator-based flat comb generator. In Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX. Vol. 9747. SPIE. 2016. 97470U. Available from, DOI: 10.1117/12.2212541

Morohashi, Isao; Kirigaya, Mayu; Kaneko, Yuta; Katayama, Ikufumi; Sakamoto, Takahide; Sekine, Norihiko; Kasamatsu, Akifumi; Hosako, Iwao / Frequency measurement of THz waves by electro-optic sampling using Mach-Zehnder-modulator-based flat comb generator.

Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX. Vol. 9747 SPIE, 2016. 97470U.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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