Low chirp electro-optic intensity modulation using planar microwave 180-degree hybrid directly prepared on LiNbO3 substrate

Akira Enokihara; Masashi Yamamoto; Tadashi Kawai; Tetsuya Kawanishi

doi:10.1109/MWP.2014.6994500

Low chirp electro-optic intensity modulation using planar microwave 180-degree hybrid directly prepared on LiNbO₃ substrate

Akira Enokihara, Masashi Yamamoto, Tadashi Kawai, Tetsuya Kawanishi

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

An electro-optic (EO) modulator integrated with the microwave planar circuit directly prepared onto a LiNbO₃ 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 LiNbO₃ 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 language	English
Title of host publication	2014 International Topical Meeting on Microwave Photonics / the 9th Asia-Pacific Microwave Photonics Conference, MWP/APMP 2014 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	97-99
Number of pages	3
ISBN (Electronic)	9784885522901
DOIs	https://doi.org/10.1109/MWP.2014.6994500
Publication status	Published - 2014 Dec 19
Externally published	Yes
Event	2014 International Topical Meeting on Microwave Photonics, MWP 2014 and the 9th Asia-Pacific Microwave Photonics Conference, APMP 2014 - Sapporo, Japan Duration: 2014 Oct 20 → 2014 Oct 23

Publication series

Name	2014 International Topical Meeting on Microwave Photonics / the 9th Asia-Pacific Microwave Photonics Conference, MWP/APMP 2014 - Proceedings

Other

Other	2014 International Topical Meeting on Microwave Photonics, MWP 2014 and the 9th Asia-Pacific Microwave Photonics Conference, APMP 2014
Country/Territory	Japan
City	Sapporo
Period	14/10/20 → 14/10/23

Keywords

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

ASJC Scopus subject areas

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

Access to Document

10.1109/MWP.2014.6994500

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 LiNbO₃ substrate. In 2014 International Topical Meeting on Microwave Photonics / the 9th Asia-Pacific Microwave Photonics Conference, MWP/APMP 2014 - Proceedings (pp. 97-99). [6994500] (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.. https://doi.org/10.1109/MWP.2014.6994500

Low chirp electro-optic intensity modulation using planar microwave 180-degree hybrid directly prepared on LiNbO₃ substrate. / Enokihara, Akira; Yamamoto, Masashi; Kawai, Tadashi et al.
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 (2014 International Topical Meeting on Microwave Photonics / the 9th Asia-Pacific Microwave Photonics Conference, MWP/APMP 2014 - Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 LiNbO₃ substrate. in 2014 International Topical Meeting on Microwave Photonics / the 9th Asia-Pacific Microwave Photonics Conference, MWP/APMP 2014 - Proceedings., 6994500, 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., 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 LiNbO₃ 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. (2014 International Topical Meeting on Microwave Photonics / the 9th Asia-Pacific Microwave Photonics Conference, MWP/APMP 2014 - Proceedings). doi: 10.1109/MWP.2014.6994500

Enokihara, Akira ; Yamamoto, Masashi ; Kawai, Tadashi et al. / Low chirp electro-optic intensity modulation using planar microwave 180-degree hybrid directly prepared on LiNbO₃ 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 (2014 International Topical Meeting on Microwave Photonics / the 9th Asia-Pacific Microwave Photonics Conference, MWP/APMP 2014 - Proceedings).

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AB - An electro-optic (EO) modulator integrated with the microwave planar circuit directly prepared onto a LiNbO3 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 LiNbO3 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.

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