Title :
Direct digital control of an efficient silicon+liquid crystal phase shifter
Author :
Yufei Xing ; Ako, Thomas ; George, John P. ; Korn, D. ; Hui Yu ; Verheyen, P. ; Pantouvaki, M. ; Lepage, G. ; Absil, P. ; Koos, C. ; Leuthold, Juerg ; Beeckman, Jeroen ; Bogaerts, W.
Author_Institution :
Dept. of Electron. & Inf. Syst., Liquid Crystal & Photonics Group, Ghent Univ., Ghent, Belgium
Abstract :
We demonstrate a phase shifter based on a silicon slot waveguide infiltrated with liquid crystal. We achieve a phase shift of 73 π for a 5V drive voltage, with a voltage-length product of 0.022V·mm around 1V. We can drive the phase shifter directly with a 1V, duobinary pulse-width-modulated signal, allowing direct digital CMOS control of an analog optical phase shifter.
Keywords :
CMOS digital integrated circuits; analogue circuits; direct digital control; elemental semiconductors; integrated optoelectronics; liquid crystal devices; optical phase shifters; optical waveguides; silicon; Si; analog optical phase shifter; direct digital CMOS control; liquid crystal; phase shifter; pulse-width-modulated signal; silicon slot waveguide; voltage 5 V to 1 V; voltage-length product; Optical waveguides; Phase modulation; Phase shifters; Pulse width modulation; Switches;
Conference_Titel :
Group IV Photonics (GFP), 2014 IEEE 11th International Conference on
Conference_Location :
Paris
Print_ISBN :
978-1-4799-2282-6
DOI :
10.1109/Group4.2014.6962029
