A Novel Dual Wing Edge Coupler for Integration of Lensed Fiber with Silicon-on-insulator Waveguide
Journal
25th Opto-Electronics and Communications Conference, OECC 2020
Date Issued
2020
Author(s)
Abstract
A high-efficiency ultra-broadband small-footprint novel dual wing edge coupler based on a silicon-on-insulator platform for direct coupling with the lensed fiber was developed. The device is composed of an inverse taper waveguide and two side wing waveguides with equal waveguide width and symmetric spacing, the widths and the spacing of the tips are fine-tuned by using the particle swarm optimization method to reduce the mode mismatch between the lensed fiber and the edge coupler. A high overall coupling efficiency up to 90.50% (0.4335 dB) for the transverse-electric (TE) mode at 1550 nm can be achieved for the 50-m-long dual wing edge coupler. The device can be operated over a broad spectral range of 1300-1850 nm with an extra loss less than 1 dB. With its high-efficiency ultra-broadband operation and small device footprint, the proposed device is promising for fiber-to-chip edge coupling in silicon photonics. ? 2020 IEEE.
Subjects
Efficiency; Fibers; Inverse problems; Particle swarm optimization (PSO); Silicon on insulator technology; Ultra-wideband (UWB); Waveguides; Coupling efficiency; Particle swarm optimization method; Silicon on insulator waveguide; Silicon-on-insulator platforms; Small footprints; Taper waveguide; Transverse electric modes; Waveguide widths; Silicon photonics
SDGs
Type
conference paper