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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Bibliographic Details
Published inIEEE photonics technology letters Vol. 9; no. 2; pp. 197 - 199
Main Authors Samson, S.A., Tavlykaev, R.F., Ramaswamy, R.V.
Format Journal Article
LanguageEnglish
Published IEEE 01.02.1997
Subjects
Crosstalk
Directional couplers
Electrodes
Fabrication
Laboratories
Microwave devices
Optical coupling
Optical waveguides
Switches
Voltage
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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.
ISSN:1041-1135
1941-0174
DOI:10.1109/68.553090