类抛物线形单孔悬挂芯光纤光镊设计与微粒操控  

Design and particle manipulation of parabolic single-hole suspended-core fiber tweezers

作　　者：李红[1,2] 牛田森 周雅妮 邢诗梦 娄小平[1,2,3] LI Hong;NIU Tiansen;ZHOU Yani;XING Shimeng;Lou Xiaoping(Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument,School of Instrument Science and Opto-Electronics Engineering,Beijing Information Science&Technology University,Beijing 100192,China;Beijing Laboratory of Optical Fiber Sensing and System,Beijing Information Science&Technology University,Beijing 100016,China;Guangzhou Nansha Intelligent Photonic Sensing Research Institute,Guangzhou 511462,China)

机构地区：[1]北京信息科技大学仪器科学与光电工程学院光电测试技术及仪器教育部重点实验室,北京100192 [2]北京信息科技大学光纤传感与系统北京实验室,北京100016 [3]广州南沙光子感知技术研究院,广东广州511462

出　　处：《红外与激光工程》2024年第9期316-328,共13页Infrared and Laser Engineering

基　　金：国家自然科学基金项目(61903042);北京学者计划研究项目(BJXZ2021-012-00046)。

摘　　要：为提高光镊系统中光纤波导耦合度与微通道集成度,实现对微粒的多样操控,提出了一种类抛物线形单孔悬挂芯光纤光镊结构,从双光束聚焦光场机制出发,分析并建立了光镊探针尖端横向和轴向光阱力数学模型,通过出射光场分布仿真模型的计算,探究了类抛物线形悬挂芯光纤中空孔直径、微粒尺寸与纤芯功率等参量对出射光场和光阱力的影响。结合悬挂芯光纤流道的气压控制,利用CO_(2)激光熔融工艺制备了光纤光镊探针,建立了针对直径2、5、10μm的聚苯乙烯微粒操控实验。研究为单孔悬挂芯光纤应用于光纤光镊实现微粒操控乃至输运提供了技术基础,也为光纤光镊提高集成度与灵活性提供了新的思路。Objective Fiber optic tweezers have characteristics of compactness,high integration capability,and excellent portability,rendering them advantageous in applications such as chemical analyses,biosynthesis,and drug delivery systems.Single-hole suspension core fiber naturally integrates fiber waveguide and microfluidic channel,which can not only capture particles but also store,transport,analyze,and detect particles such as cells or drug molecules if applied in fiber optic tweezers.However,fiber-optic tweezers typically necessitate integration with microchannels or microfluidic technologies to perform multidimensional manipulations like transportation and sorting.The manufacture of microfluidic devices is complicated,and microfluidic devices and optical fibers as mutually independent devices with low system optical coupling efficiency and integration.Therefore,a simpler more efficient,and highly integrated method for particle or cell manipulation and transport is needed.For this reason,this thesis carries out research on fiber optic tweezer technology based on single-hole suspension core fibers to address the key issue of particle manipulation by suspension core fibers with hollow hole structures.Methods The particle manipulation principle of single-hole-suspended-core fiber optical tweezers is analyzed,the analytical model of single-hole-suspended-core fiber optical tweezers is established from the mechanism of the double-beam focused light field,the analytical calculation method of the light trapping force is determined,and the characteristics of single-hole-suspended-core fibers with symmetric and off-core structures are analyzed at the same time.A parabolic-shaped single-hole-suspended-core fiber optical tweezers probe is designed,and its simulation model is used to calculate the optical field and optical trapping force,analyze the energy distribution and the characteristics of the optical trapping force,and investigate the specific effects of the hollow aperture,particle size,and core power on the optical trapp

关 键 词：光纤光镊 单孔悬挂芯光纤 抛物线形 光阱力 光操控 

分 类 号：TN253[电子电信—物理电子学]