Design and simulation of ultra-low loss triple tapered asymmetric directional coupler at 1330 ​nm. (January 2021) - Sharma, Bhawna
Abstract: Optical coherence tomography (OCT) is a promising imaging modality for clinical. Its certain limitations such as size and complexity are rather challenging wherein exploiting integrated optics provide benefits over reduced size and lesser complexity. We have designed and reported a broadband and low loss linearly tapered directional coupler as a substitute to replace bulky beam splitter that are deployed currently in OCT systems. The reported structure has a small footprint and broadband over 100 ​nm bandwidth with an excess loss of 0.059 ​dB ​at 1330 ​nm central wavelength. The structure designed on silicon nitride platform upon integration with other components will provide a miniaturized OCT system.