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Slotted electro-optic ring resonator as a tunable optical power splitter
Author(s): Rajib R. Ghosh; Janib Bashir; Smruti R. Sarangi; Abhijit Das; Anuj Dhawan
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Paper Abstract

In this letter, we present a novel optical power splitter having an arbitrary split-ratio that can be tuned over a wide range by employing relatively low voltage levels. It is based on a slotted ring resonator. A 120 nm electro-optic polymer-filled slot is created throughout the circumference of the ring. The hybrid ring resonator is made to work between the full and off resonance states, allowing it to work as a power splitter. This is done by changing the refractive index of the electrooptic polymer inside the slot by the application of an external electric field. The splitter combines the electro-optic functionality of the polymer with the high index contrast of the silicon, resulting in a low tuning voltage power splitter. Over a small voltage range of 0-1 V, it is possible to change the split-ratio of this splitter from 0.031-16.738, making it 10 times better than other competing designs. In addition, it takes less than 500 ps to reconfigure the splitter.

Paper Details

Date Published: 4 March 2019
PDF: 7 pages
Proc. SPIE 10923, Silicon Photonics XIV, 109231U (4 March 2019); doi: 10.1117/12.2511024
Show Author Affiliations
Rajib R. Ghosh, Indian Institute of Technology Delhi (India)
Janib Bashir, Indian Institute of Technology Delhi (India)
Smruti R. Sarangi, Indian Institute of Technology Delhi (India)
Abhijit Das, Indian Institute of Technology Delhi (India)
Anuj Dhawan, Indian Institute of Technology Delhi (India)

Published in SPIE Proceedings Vol. 10923:
Silicon Photonics XIV
Graham T. Reed; Andrew P. Knights, Editor(s)

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