Electro-optic single-sideband modulator integrated with branch-line coupler of miniaturized configuration prepared on LiNbO3 substrate

Author

Yamamoto, Katsuyuki ; Kawai, Tadashi ; Enokihara, Akira ; Kawanishi, Tetsuya

Author_Institution

Grad. Sch. of Eng., Univ. of Hyogo, Himeji, Japan

fYear

2014

fDate

6-9 Oct. 2014

Firstpage

668

Lastpage

671

Abstract

The branch-line coupler (BC) circuit of miniaturized configuration using periodically installed open circuit stabs was designed onto an electro-optic (EO) crystal, LiNbO₃, substrate at 10 GHz. The operation as the 90 degree hybrid was confirmed at around the center frequency by the experiment. By using this BC circuit as the signal power divider, we proposed a compact EO single sideband (SSB) modulator. The SSB modulator was designated and fabricated for 1550 nm light wavelength. In the experiment, the optical SSB signal with the sideband suppression ratio of about 30 dB was observed.

Keywords

electro-optical modulation; lithium compounds; microwave photonics; optical couplers; optical design techniques; optical fabrication; BC circuit; LiBO₃; branch-line coupler; electrooptic single-sideband modulator; frequency 10 GHz; optical SSB signal; sideband suppression ratio; wavelength 1550 nm; Amplitude modulation; Electrodes; Optical fibers; Optical interferometry; Optical modulation; Lithium niobate; couplers; electrooptic modulators; microwave photonics;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference (EuMC), 2014 44th European

Conference_Location

Rome

Type

conf

DOI

10.1109/EuMC.2014.6986522

Filename

6986522