An experimental and theoretical study on the 3D trapping and manipulation of microbubbles by means low power laser-induced temperature gradients induced in ethanol by bulk light absorption (λ = 1550 nm) is presented. Two optical fibers were used: One for bubble generation (OF_G) and the other for both trapping and manipulation (OF_T). Light from a Q-switched pulsed laser (λ = 532 nm and pulse width τ_p = 5 ns) propagates in fiber OF_G and gets absorbed at silver nanoparticles (AgNPs), previously photodeposited, at the distal end of a fiber optic core, generating the microbubbles. In the fiber OF_T, light of low power CW laser was used to trap and manipulate the bubbles by thermocapillary induced by light bulk absorption in ethanol. The microbubble generated on OF_G migrates toward the fiber OF_T. The equilibrium between the buoyancy force F_B, drag force F_D and the Marangoni force (also known as thermocapillary force) F_M gives rise to a 3D stably trapping and manipulation of the microbubble for the best time to our best knowledge.

通过大量吸收光在乙醇中诱导的低功率激光诱导的温度梯度对微气泡进行3D捕获和处理的实验和理论研究（λ= 1550 nm）。使用了两种光纤：一种用于产生气泡（OF _G），另一种用于捕获和操纵（OF _T）。来自调Q脉冲激光的光（λ = 532 nm和脉冲宽度 τ_p = 5 ns）在光纤OF _G中传播，并被预先光沉积在光纤核心远端的银纳米颗粒（AgNP）吸收，从而产生微泡。在OF _T光纤中，低功率连续波激光的光被乙醇中的轻质吸收所引起的热毛细管捕获并操纵气泡。在OF _G上产生的微气泡向光纤OF _T迁移。浮力之间的平衡F_乙， 拖曳力 F_d 和Marangoni力（也称为热毛细管力） F_中号 在我们所知的最佳时间产生了3D稳定捕获和操纵微泡的过程。