Low Chirp Electro-optic Intensity Modulation Using Planar Microwave 180-degree Hybrid Directly Prepared on LiNbO3 Substrate

被引:0
作者
Enokihara, Akira [1 ]
Yamamoto, Masashi [1 ]
Kawai, Tadashi [1 ]
Kawanishi, Tetsuya [2 ]
机构
[1] Univ Hyogo, Grad Sch Engn, 2167 Shosha, Himeji, Hyogo 6712280, Japan
[2] Natl Inst Informat & Commun Technol, Photon Network Res Inst, Koganei, Tokyo 1848795, Japan
来源
2014 INTERNATIONAL TOPICAL MEETING ON MICROWAVE PHOTONICS (MWP) AND THE 2014 9TH ASIA-PACIFIC MICROWAVE PHOTONICS CONFERENCE (APMP) | 2014年
关键词
light-frequency chirp; electro-optic modulator; rat-race; Mach-Zehnder interferometer;
D O I
暂无
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
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 anti-phase 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.
引用
收藏
页码:97 / 99
页数:3
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