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.
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

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
Volume2016-August
ISSN (Print)0149-645X

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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