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Low-crosstalk 2×2 digital optical switch

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2 Author(s)
Okayama, H. ; R&D Group, Oki Electr. Ind. Co. Ltd., Tokyo ; Kawahara, M.

The development of a low-crosstalk 2×2 digital optical switch is reported. The device is a composite structure composed of four low-drive-voltage Y-branch digital optical switches and an asymmetric X-junction. A minimum crosstalk level of -37 dB was achieved in the TM mode, while in the TE mode the level was -42 dB. The voltage-total-length product is identical to that of a conventional 2×2 digital optical switch operating at a given level of crosstalk

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Electronics Letters  (Volume:30 ,  Issue: 5 )