Digitally Controlled Phase Shifter Using an SOI Slot Waveguide With Liquid Crystal Infiltration
- 25 March 2015
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 27 (12) , 1269-1272
- https://doi.org/10.1109/lpt.2015.2416438
Abstract
We demonstrate a phase shifter using a silicon slot waveguide infiltrated with liquid crystal. For a 1-mm long device we achieve 73π phase shift with a 5 V voltage, with a voltage-length product of 0.0224 V· mm ~1 V. We drive the phase shifter with a digital 1 V, duobinary pulsewidth-modulated signal, or a 1 V frequency-modulated signal. This enables direct digital CMOS control of an analog optical phase shifter.Keywords
Funding Information
- European Union through the Seventh Framework Programme (FP7-SOFI)
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