光通信技术2026，Vol.50Issue(2)：26-33,8.DOI:10.13921/j.cnki.issn1002-5561.2026.02.005
基于MMI的光纤光热探针设计与实验研究
Design and experimental study of fiber-optic photothermal probe based on MMI
摘要
Abstract
To overcome the performance degradation caused by localized overheating of photothermal materials under conven-tional fiber irradiation,and to meet the requirements for precise thermal effects in tumor photothermal therapy,a fiber-optic photothermal probe(FOPP)based on multimode interference(MMI)is proposed.The probe employs an MMI coupler for light-splitting functionality and utilizes a highly thermally conductive polydimethylsiloxane(PDMS)-graphene polymer com-posite to construct a heat conduction channel,effectively enhancing thermal diffusion efficiency.Experimental results show that the temperature sensitivity of the fabricated fiber Bragg grating with a 1 mm grating region is approximately 10.4～10.45 pm/℃,exhibiting excellent linearity(R²>0.9995).Under low-power laser irradiation below 100 mW,the fiber-optic Fabry-Perot probe(FOPP)successfully achieved dynamic temperature measurement in ex vivo liver tissue,with a measured maximum temperature of 51.4 ℃,effectively covering the hyperthermia safe temperature range of 42～48 ℃.关键词
精准热疗/光纤光热探针/多模干涉耦合器/聚合物复合材料Key words
precision heat therapy/fiber-optic photothermal probe/multimode interference coupler/polymer composite material分类
信息技术与安全科学引用本文复制引用
卢叶平,于洋,张振荣,刘嫱,王冬迎,李洁,何绮宁,农恒昌..基于MMI的光纤光热探针设计与实验研究[J].光通信技术,2026,50(2):26-33,8.基金项目
国家自然科学基金项目(62365001)资助. （62365001）
