Integrated photonics chip with InGaN/GaN light-emitting diode and bended waveguide for visible-light communications
Abstract
We propose an integrated photonics chip having InGaN/GaN micro-LED and free-standing bended waveguide on GaN-on-silicon platform to change the propagation direction of light by 180° and achieve free-space visible-light communication (VLC) with high speed. The light transmission performance and light loss due to bended waveguides with different geometrical parameters are studied by analyzing the light intensity of tip and middle of bended waveguide in FDTD simulation and experiment. Moreover, with the waveguide width decreasing from 8 μm to 4 μm, light intensity ratio between emitting light transmitted to waveguide tip and light leakage from middle of waveguide shows an over linear reduction. Meanwhile, the decreasing of the diameter of waveguide curvature from 500 μm to 250 μm only results in under linear increase of light intensity ratio. Besides, the free-space data transmission test with 100 Mbps rate is conducted by using integrated chip as transmitting terminal in VLC. This study opens a novel way for the application of bended waveguides in connecting the multiple independent optics components in photonics chip and confining optical signal in efficient on-chip optical signal transmission in VLC.
- Publication:
-
Optics Laser Technology
- Pub Date:
- June 2019
- DOI:
- 10.1016/j.optlastec.2019.01.041
- Bibcode:
- 2019OptLT.114..103L
- Keywords:
-
- Gallium nitride;
- Light-emitting diodes;
- Optical waveguide;
- Photonics chip;
- Visible-light communication