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Traveling-wave type LiNbO/sub 3/ optical modulator with a superconducting coplanar waveguide electrode

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3 Author(s)
Yoshida, K. ; Dept. of Electron. Device Eng., Kyushu Univ., Fukuoka, Japan ; Minami, A. ; Kanda, Y.

Microwave characteristics of a LiNbO/sub 3/ optical modulator employing a superconductor electrode (Nb) as a transmission line of a traveling signal has been studied experimentally in the temperature range from 300 K to 4.2 K. In the frequency range between dc and 26.5 GHz it is shown that the obtained modulation depth is in good agreement with the theoretically expected one. The present results demonstrate the possible applications of superconducting electrodes to high performance LiNbO/sub 3/ optical modulators.

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Applied Superconductivity, IEEE Transactions on  (Volume:7 ,  Issue: 2 )