Polarization independent, integrated optical, acoustically tunable wavelength filters/switches with tapered acoustical directional coupler
- 1 November 1994
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 6 (11) , 1335-1337
- https://doi.org/10.1109/68.334831
Abstract
Enhanced sidelobe suppression of the filter characteristics of tunable acousto-optical mode converters in LiNbO/sub 3/ has been achieved using for the first time tapered acoustical directional couplers. A sidelobe suppression of more than 15.5 dB could be demonstrated in a single stage device. By combining the mode converter with two integrated optical polarization splitters a polarization independent filter/wavelength selective switch has been fabricated with less than 3 dB intrinsic insertion loss, a polarization dependence of less than 1 dB, and a sidelobe suppression exceeding 14 dB.Keywords
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