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Control Scheme for Optimizing the Interferometer Phase Bias in the Symmetric-Mach-Zehnder All-Optical Switch
Yoshiyasu UENO Morio TAKAHASHI Shigeru NAKAMURA Kouichi SUZUKI Takanori SHIMIZU Akio FURUKAWA Takemasa TAMANUKI Kazuo MORI Satoshi AE Tatsuya SASAKI Kazuhito TAJIMA
IEICE TRANSACTIONS on Electronics
Publication Date: 2003/05/01
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Joint Special Issue on Recent Progress in Optoelectronics and Communications)
Category: OECC Awarded Paper
all-optical, control scheme, demultiplexing, interferometer, phase bias,
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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, a weak cw light is used as a supervisory input light and its spectral power ratio at the switch output is used as a bipolar error signal. Our experimental result at 168-Gb/s 16:1 demultiplexing with a hybrid-integrated SMZ switch indicates the feasibility and the sensitivity of this control scheme.