Frequency chirp modulation by electro-optic modulator integrated with microwave rat-race circuit and measurement of chirp parameter by using optical fiber dispersion

Ryota Nakamura, Katsuyuki Yamamoto, Tadashi Kawai, Akira Enokihara, Naokatsu Yamamoto, Tetsuya Kawanishi

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

    3 Citations (Scopus)

    Abstract

    The rat-race (RR) circuit, which operates as a 180-degree hybrid, with an asymmetric power split ratio was integrated with the dual electrode type electro-optic modulator on the same substrate. Thereby, frequency chirp modulation with a compact configuration was realized. The RR circuit was designed with 4.5 1 power split ratio on a z-cut LiNbO3 substrate. The operation of the modulator was confirmed by observing the output light spectra. Moreover, the chirp parameter was directly measured by using the chromic dispersion of the optical fiber, where the power penalty of detected modulation signals transmitted through optical fiber was observed as a function of the fiber distance. The chirp parameter of the modulated light at 10 GHz was confirmed to be 0.47 by the measurement.

    Original languageEnglish
    Title of host publication2016 IEEE MTT-S International Microwave Symposium, IMS 2016
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Volume2016-August
    ISBN (Electronic)9781509006984
    DOIs
    Publication statusPublished - 2016 Aug 9
    Event2016 IEEE MTT-S International Microwave Symposium, IMS 2016 - San Francisco, United States
    Duration: 2016 May 222016 May 27

    Other

    Other2016 IEEE MTT-S International Microwave Symposium, IMS 2016
    CountryUnited States
    CitySan Francisco
    Period16/5/2216/5/27

    Keywords

    • Chirp modulation
    • Electro-optic modulators
    • Microwave circuits
    • Microwave photonics
    • Optical fiber dispersion

    ASJC Scopus subject areas

    • Radiation
    • Condensed Matter Physics
    • Electrical and Electronic Engineering

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  • Cite this

    Nakamura, R., Yamamoto, K., Kawai, T., Enokihara, A., Yamamoto, N., & Kawanishi, T. (2016). Frequency chirp modulation by electro-optic modulator integrated with microwave rat-race circuit and measurement of chirp parameter by using optical fiber dispersion. In 2016 IEEE MTT-S International Microwave Symposium, IMS 2016 (Vol. 2016-August). [7539999] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MWSYM.2016.7539999