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A low DC-drift Ti:LiNbO3 modulator assured over 15 years

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The use of the Ti:LiNbO3 modulator has begun in advanced optical transmission experiments (1) and it is planned for commercial optical transmission systems. There has, however, been no report to guarantee the long-term reliability of Ti:LiNbO3 devices against DC drift. DC drift is complicated by temperature and humidity. We prevented the temperature and humidity drift by employing a Si coating technique (1). We evaluated the long-term DC drifts of our modulator and confirmed that it is stable enough for use in commercial optical transmission systems.

© 1992 Optical Society of America

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