Two-section reversed /spl Delta//spl beta/ switch with uniform electrodes and domain reversal
The performance of the reversed-/spl Delta//spl beta/ LiNbO/sub 3/ optical directional coupler (DC) switch with electrodes of opposite polarity is known to be more tolerant to variations in coupling length than that of the single-section DC. However, sectioned electrodes are incompatible to a single...
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Published in | IEEE photonics technology letters Vol. 9; no. 2; pp. 197 - 199 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
IEEE
01.02.1997
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Subjects | |
Online Access | Get full text |
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Summary: | The performance of the reversed-/spl Delta//spl beta/ LiNbO/sub 3/ optical directional coupler (DC) switch with electrodes of opposite polarity is known to be more tolerant to variations in coupling length than that of the single-section DC. However, sectioned electrodes are incompatible to a single microwave source and, therefore, preclude the use of the device in high-speed applications. In this letter, we discuss the operation and results of a modified DC that uses a domain reversal and uniform electrodes that can be readily matched to a microwave source. A crosstalk of -34 dB was measured in an experimental device, fabricated in Z-cut LiNbO/sub 3/. Factors which improve device performance are also discussed. |
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ISSN: | 1041-1135 1941-0174 |
DOI: | 10.1109/68.553090 |