Abstract

Reducing the bending radius of low-index-contrast waveguides is essential in reducing the size of the integrated optical components. A polymeric multimode waveguide bend is presented based on the Eaton lens. Ray-tracing calculations are utilized to truncate the Eaton lens in order to improve the performance of the bend. The truncation of the lens decreases the footprint of the bend as well. A designed waveguide bend with a radius of 18.4 μm is implemented by a concentric cylindrical multilayer structure. Average bend losses of 0.69 and 0.87 dB are achieved for the ${\mathrm{TM}}_0$ and ${\mathrm{TM}}_1$ modes, respectively, in the C-band of optical communication. The bend loss is lower than 1 dB in a bandwidth of 1520–1675 nm for both modes.

© 2019 Optical Society of America

Low-index-contrast waveguide bend based on truncated Eaton lens implemented by graded photonic crystals

S. Hadi Badri and M. M. Gilarlue
J. Opt. Soc. Am. B 36(5) 1288-1293 (2019)

Multimode waveguide crossing based on a square Maxwell’s fisheye lens

S. Hadi Badri, H. Rasooli Saghai, and Hadi Soofi
Appl. Opt. 58(17) 4647-4653 (2019)

Transition, radiation and propagation loss in polymer multimode waveguide bends

Ioannis Papakonstantinou, Kai Wang, David R. Selviah, and F. Aníbal Fernández
Opt. Express 15(2) 669-679 (2007)

Coupling silica waveguides to photonic crystal waveguides through a multilayered Luneburg lens

S. Hadi Badri and M. M. Gilarlue
J. Opt. Soc. Am. B 37(1) 104-109 (2020)

Low-loss and low-crosstalk multimode waveguide bend on silicon

Xiaohui Jiang, Hao Wu, and Daoxin Dai
Opt. Express 26(13) 17680-17689 (2018)