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Microwave Characteristics of a Traveling-Wave Type LiNbO3 Optical Modulator with Superconducting Electrodes
Keiji YOSHIDA Noriaki HORIGUCHI Yutaka KANDA
IEICE TRANSACTIONS on Electronics
Publication Date: 1993/08/25
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on High-Temperature Superconducting Electronics)
LiNbO3 optical modulator, superconducting electrodes, traveling-wave type optical modulator, microwave characteristics,
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Microwave characteristics of a LiNbO3 optical modulator employing superconductor electrodes (Pb-In-Au) as a transmission line of a traveling signal has been studied experimentally in the temperature range from 300 K to 4.2 K. At frequencies between 8 GHz and 12 GHz it is shown that the obtained modulation efficiency increases as expected from theory when the superconductor undergoes the transition from a normal state to a superconducting state. The present results dumonstrate the possible applications of superconducting electrodes to high performance LiNbO3 optical modulators.