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A broadband Ti:LiNbO3 optical modulator with a ridge structure

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4 Author(s)
Noguchi, K. ; NTT Opto-Electron. Labs., Kanagawa, Japan ; Mitomi, O. ; Miyazawa, H. ; Seki, S.

We describe the design, fabrication, and characteristics of a Ti:LiNbO3 optical modulator with a ridge structure. The structure keeps microwave propagation loss low and enables a large interaction between microwaves and optical waves under the conditions of velocity-matching and impedance matching, resulting in a large modulation bandwidth and low driving voltage. Using this structure, we have developed an optical intensity modulator with an optical 3-dB bandwidth of 75 GHz and a driving voltage of 5.0 V at a wavelength of 1.5 μm

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Lightwave Technology, Journal of  (Volume:13 ,  Issue: 6 )