用于可控式粒子捕获和轴向往复运动的电流调制型单光纤光镊  

Current-Modulated Single Fiber Optical Tweezers for Controlled Particle Capture and Axial Reciprocating Motion

作　　者：王秀芳[1] 刘旭 董太极 闫文迪 刘勇智 高丙坤[1] Wang Xiufang;Liu Xu;Dong Taiji;Yan Wendi;Liu Yongzhi;Gao Bingkun(School of Electrical&Information Engineering,Northeast Petroleum University,Daqing 163318,Heilongjiang,China;Daqing Oilfield Information Technology Company,Daqing 163453,Heilongjiang,China)

机构地区：[1]东北石油大学电气信息工程学院,黑龙江大庆163318 [2]大庆油田信息技术公司,黑龙江大庆163453

出　　处：《光学学报》2023年第14期68-74,共7页Acta Optica Sinica

基　　金：黑龙江省自然科学基金(LH2022E024)。

摘　　要：提出一种基于电流调制的新型单光纤光镊。通过将经电流调制的980 nm激光注入单模光纤,光纤探头的输出功率发生周期性变化,实现了对粒子运动距离和运动速度的可控式操纵。此外,通过调整盖玻片的倾斜角度改变溶液蒸发力的大小,实现了对粒子的稳定捕获。在构建平面锥形纤维探针的基础上,搭建仿真模型,分析粒子的受力情况,并进行实验验证。实验结果表明,通过对激光器的驱动电流进行调制,可以操纵聚苯乙烯小球实现长达22.76μm的粒子运输,且粒子的运动速度与激光器的调制电流有关,实验结果得到了数值模拟的支持。所提方法使得粒子捕获点的可变式调节和粒子的长距离轴向可控式运输成为可能。Objective The optical manipulation of particles is important in biomedicine,physics,and optics.Given the rapid development of the field of micromanipulation,there is considerable demand for improved functionality of optical tweezers.Currently,conventional optical tweezers and fiber optic optical tweezers can achieve limited particle transport without moving the probe.This limitation may have certain operational and analytical implications in the measurement of the angular frequency of cells for malaria diagnosis using optical capture techniques.Thus,there is a requirement to perform research on controlled and stable particle capture using fiber optic optical tweezers without moving the fiber and reciprocal axial transport between different capture sites.Certain researchers proposed multiple cases of reciprocal particle transport using fiber optic optical tweezers such as mode multiplexed tweezers and dual fiber optical tweezers.Most mode multiplexing tweezers use misaligned fusion to generate LP01 and LP11 modes in singlemode fibers,and these modes can realize the reciprocal motion of particles without moving the fiber.These tweezers have special requirements for shaping the fiber tip and cannot achieve reciprocal motion over long distances owing to the formation of two focal positions.Dual fiber optical tweezers are used to change the force balance of particles by adjusting the magnitude of the optical power emitted from both fiber ends so as to achieve particle capture and reciprocal motion.However,this method is a complex experimental setup,involves cumbersome operation,and has a limited particle transport distance owing to the two fiber ends.Therefore,in this study,a new fiber optic optical tweezer device is proposed that enables stable particle capture and the controlled manipulation of motion distance and velocity without moving the fiber optic probe.Methods A new optical tweezer is proposed using the balance of solution evaporation force and optical force in which an appropriate amount of blue butyl glue i

关 键 词：光纤光镊 电流调制 粒子捕获与操纵 生物传感 

分 类 号：Q631[生物学—生物物理学]