Erbium-doped lithium niobate waveguide amplifier enhanced by an inverse-designed on-chip reflector
Abstract
This study presents a 3.6-cm-long erbium-doped lithium niobate waveguide amplifier enhanced by an inverse-designed on-chip reflector. Integrating the reflector at the waveguide end yielded an internal net gain of 40.5 dB, achieving a 17.3 dB gain improvement compared to a comparable reflector-free amplifier under small signal conditions. By eliminating bidirectional pumping requirements, the system complexity was reduced. These results highlight a novel strategy for optimizing integrated optical amplifiers, combining high gain with simplified architecture. The approach holds promise for advancing high-density photonic integrated systems, demonstrating the efficacy of inverse design in tailoring photonic device performance for practical applications.
Keywords
Cite
@article{arxiv.2504.04149,
title = {Erbium-doped lithium niobate waveguide amplifier enhanced by an inverse-designed on-chip reflector},
author = {Zhiwei Wei and Jiangwei Wu and Chengyu Chen and Hao Li and Wenjie Wan and Xianfeng Chen and Yuping Chen},
journal= {arXiv preprint arXiv:2504.04149},
year = {2025}
}