Open AccessDesigning MMI structured beam-splitter in LiNbO3 crystal based on a combination of ion implantation and femtosecond laser ablation
Author(s) -
Yicun Yao,
Wenjun Wang,
Bingyuan Zhang
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.019648
Subject(s) - beam splitter , fabrication , materials science , optics , femtosecond , splitter , laser , optoelectronics , ablation , laser ablation , physics , medicine , alternative medicine , engineering , pathology , aerospace engineering
In this work, the design and numerical study of a MMI-based LiNbO 3 beam splitter were presented, with a combination of ion implantation and femtosecond laser ablation as a fabricating strategy. The designed splitters show advantages such as good fabrication tolerance, low insertion loss, compactness, and simple fabrication processes. We also demonstrated that the self-imaging principle could be applied to design low-loss MMI beam splitters for multi-mode input with mode number m = 1 and n>1 by carefully choosing the geometry parameters. The presented fabrication strategy provides an alternative choice for the fabrication of power splitters also with other MMI-based devices in various optical monocrystal chips.