Slotted electro-optic ring resonator as a tunable optical power splitter

Rajib R. Ghosh; Janib Bashir; Smruti R. Sarangi; Abhijit Das; Anuj Dhawan

doi:10.1117/12.2511024

4 March 2019 Slotted electro-optic ring resonator as a tunable optical power splitter

Rajib R. Ghosh, Janib Bashir, Smruti R. Sarangi, Abhijit Das, Anuj Dhawan

Proceedings Volume 10923, Silicon Photonics XIV; 109231U (2019) https://doi.org/10.1117/12.2511024
Event: SPIE OPTO, 2019, San Francisco, California, United States

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.

Citation Download Citation

Rajib R. Ghosh, Janib Bashir, Smruti R. Sarangi, Abhijit Das, and Anuj Dhawan "Slotted electro-optic ring resonator as a tunable optical power splitter", Proc. SPIE 10923, Silicon Photonics XIV, 109231U (4 March 2019); https://doi.org/10.1117/12.2511024

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KEYWORDS

Resonators

Refractive index

Electro optic polymers

Silicon

Electro optics

Waveguides

Finite-difference time-domain method

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