Low chirp electro-optic intensity modulation using planar microwave 180-degree hybrid directly prepared on LiNbO<inf>3</inf> substrate

Akira Enokihara, Masashi Yamamoto, Tadashi Kawai, Tetsuya Kawanishi

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

1 Citation (Scopus)

Abstract

An electro-optic (EO) modulator integrated with the microwave planar circuit directly prepared onto a LiNbO<inf>3</inf> substrate for low chirp performance and compact configuration is introduced. A microwave rat-race (RR) circuit, which operates as the 180-degree hybrid, is designed on a z-cut LiNbO<inf>3</inf> substrate to create two modulation signals of the same amplitude in antiphase with each other from a single-input signal. Output ports of the RR were connected to the modulation electrodes on the substrate. The two signals drive two phase modulation parts of dual-electrode Mach-Zehnder modulator so that the symmetric interference are realized to obtain low-chirp intensity modulated light signals. The modulator was designed and fabricated for around 10 GHz modulation frequencies and 1550 nm light wavelength. The chirp parameters were measured to be less than 0.2 in the frequency range between 8 and 12 GHz. By compensating the unbalance of the light power splitting the chirp could be significantly reduced.

Original languageEnglish
Title of host publication2014 International Topical Meeting on Microwave Photonics / the 9th Asia-Pacific Microwave Photonics Conference, MWP/APMP 2014 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages97-99
Number of pages3
ISBN (Print)9784885522901
DOIs
Publication statusPublished - 2014 Dec 19
Externally publishedYes
Event2014 International Topical Meeting on Microwave Photonics, MWP 2014 and the 9th Asia-Pacific Microwave Photonics Conference, APMP 2014 - Sapporo, Japan
Duration: 2014 Oct 202014 Oct 23

Other

Other2014 International Topical Meeting on Microwave Photonics, MWP 2014 and the 9th Asia-Pacific Microwave Photonics Conference, APMP 2014
CountryJapan
CitySapporo
Period14/10/2014/10/23

Fingerprint

Electrooptical effects
Modulators
Microwaves
Modulation
Substrates
Electrodes
Networks (circuits)
Phase modulation
Frequency modulation
Mach number
Wavelength
lithium niobate

Keywords

  • electro-optic modulator
  • light-frequency chirp
  • Mach-Zehnder interferometer
  • rat-race

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Cite this

Enokihara, A., Yamamoto, M., Kawai, T., & Kawanishi, T. (2014). Low chirp electro-optic intensity modulation using planar microwave 180-degree hybrid directly prepared on LiNbO<inf>3</inf> substrate. In 2014 International Topical Meeting on Microwave Photonics / the 9th Asia-Pacific Microwave Photonics Conference, MWP/APMP 2014 - Proceedings (pp. 97-99). [6994500] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MWP.2014.6994500

Low chirp electro-optic intensity modulation using planar microwave 180-degree hybrid directly prepared on LiNbO<inf>3</inf> substrate. / Enokihara, Akira; Yamamoto, Masashi; Kawai, Tadashi; Kawanishi, Tetsuya.

2014 International Topical Meeting on Microwave Photonics / the 9th Asia-Pacific Microwave Photonics Conference, MWP/APMP 2014 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2014. p. 97-99 6994500.

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

Enokihara, A, Yamamoto, M, Kawai, T & Kawanishi, T 2014, Low chirp electro-optic intensity modulation using planar microwave 180-degree hybrid directly prepared on LiNbO<inf>3</inf> substrate. in 2014 International Topical Meeting on Microwave Photonics / the 9th Asia-Pacific Microwave Photonics Conference, MWP/APMP 2014 - Proceedings., 6994500, Institute of Electrical and Electronics Engineers Inc., pp. 97-99, 2014 International Topical Meeting on Microwave Photonics, MWP 2014 and the 9th Asia-Pacific Microwave Photonics Conference, APMP 2014, Sapporo, Japan, 14/10/20. https://doi.org/10.1109/MWP.2014.6994500
Enokihara A, Yamamoto M, Kawai T, Kawanishi T. Low chirp electro-optic intensity modulation using planar microwave 180-degree hybrid directly prepared on LiNbO<inf>3</inf> substrate. In 2014 International Topical Meeting on Microwave Photonics / the 9th Asia-Pacific Microwave Photonics Conference, MWP/APMP 2014 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2014. p. 97-99. 6994500 https://doi.org/10.1109/MWP.2014.6994500
Enokihara, Akira ; Yamamoto, Masashi ; Kawai, Tadashi ; Kawanishi, Tetsuya. / Low chirp electro-optic intensity modulation using planar microwave 180-degree hybrid directly prepared on LiNbO<inf>3</inf> substrate. 2014 International Topical Meeting on Microwave Photonics / the 9th Asia-Pacific Microwave Photonics Conference, MWP/APMP 2014 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2014. pp. 97-99
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