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Four-Port Optical Switch Having Three Connection States With Si Waveguides

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6 Author(s)
Shoji, Y. ; Network Photonics Res. Center, Nat. Inst. of Adv. Ind. Sci. & Technol., Tsukuba, Japan ; Kintaka, K. ; Suda, S. ; Kawashima, H.
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We propose a novel four-port optical switch, which has three possible connection states among the four ports. The device consists of two cross-bar switches, which join with unique connections. We fabricate a four-port optical switch composed of Mach-Zehnder interferometer switches with silicon waveguides; the fabricated switch has a small footprint of 800 × 400 μm2. The three-way switching operation with extinction ratios of up to 30 dB and switching time of 40 μs is demonstrated at telecom wavelengths.

Published in:

Photonics Technology Letters, IEEE  (Volume:23 ,  Issue: 1 )