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Control scheme for optimizing the interferometer phase bias in a symmetric-Mach-Zehnder-type all-optical switch

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11 Author(s)
Ueno, Y. ; Networking Res. Labs., NEC Corp., Ibaraki, Japan ; Takahashi, M. ; Nakamura, S. ; Suzuki, K.
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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.

Published in:

Photonics Technology Letters, IEEE  (Volume:14 ,  Issue: 12 )

Date of Publication:

Dec. 2002

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