Work

Fabrication and Performance Analysis of Single-Mode Polymer Waveguides and Devices

Year: 2025

Type: article

Abstract: Low-cost lithography and wet development process are optimized for fabricating single-mode polymer waveguides and de-vices with small gap structures on FR4 substrate. The fabricated single-mode waveguide with core dimension of 6.04 μm × 6.05 μm exhibits the transmission loss of 1.47 dB/cm and the double-end coupling loss of 1.58 dB with single-mode fibers at 1310 nm. The relationship between the bending loss and the bending radius is also investigated, and a bending radius of larger than 20 mm is recommended. In order to verify the reliability of the optimized process in fabricating devices with small feature sizes, power splitters based on directional coupler and multimode interference are designed and fabricated, and the measurement results show good agreement with the simulation results.

Source: IEEE photonics journal

DOI: 10.1109/jphot.2025.3573979

Authors: Han Wu, Ruizhi Jia, Fuling Wang, Liuge Du, Xiao Xu, Jia Zhao

Institution: Shandong University

Language: English

Topic: Photonic and Optical Devices

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,075

Funders: National Natural Science Foundation of China, Natural Science Foundation of Shandong Province