Control scheme for optimizing the interferometer phase bias in a symmetric-Mach-Zehnder-type all-optical switch |
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| Authors: | Ueno Y. Takahashi M. Nakamura S. Suzuki K. Shimizu T. Furukawa A. Tamanuki T. Mori K. Ae S. Sasaki T. Tajima K. |
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| Affiliation: | Networking Res. Labs., NEC Corp., Ibaraki, Japan; |
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| Abstract: | A control scheme for accurately optimizing (and also automatically stabilizing) the interferometer phase bias of symmetric-Mach-Zehnder (SMZ)-type ultrafast all-optical switches is proposed. In this control scheme, weak continuous-wave light is used as supervisory input light and its spectral power ratio at the switch output is used as a bipolar error signal. Our experimental results for 168-Gb/s 16:1 demultiplexing with a hybrid-integrated SMZ switch indicate the feasibility and the sensitivity of this control scheme. |
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