53 nm Wavelength Tunability due to a Curvature of S-Bend in Optical Power Splitter

TLDR: In this paper, the S-bend curvature was used to achieve a smooth transition of power from one port to another port, and the tunability was extended from O-band to E-band.

Abstract: ---------------------------------------------------------------------------------------------------------------Wavelength tunability is possible by many techniques like MMI coupler, external modulator due to thermal effects on the Mach Zehnder modulator etc. Our this study demonstrates an easy method to achieve the wavelength tunability without much cumbersome technique discussed in the past. Our study reveals that by using S-bend curvature, we can achieve a smooth transition of power from one port to another port. We have used the standard parameters to design S-bend optical power splitter. This paper discusses the tunability without an external modulator. We have shown through the beam propagation method (BPM) simulation that 53 nm tunability extended from “O-band” to “E-band” as possible by our structure. Our study expected to be an accurate up to error. We have too carried out insertion loss, field propagation through the S-band structures. We have used the transparent boundary condition to avoid any back reflection at the boundary of the S-bend structure. Our waveguide structure maintains single mode operation at an entire structure. The experimental results show that, as the tilt angle increases the normalized optical power decreases for that arm. The results have been verified by MATLAB based simulation as well as OptiBPM software.