针对静电纺丝射流直径小、速度快，不易检测的难题，提出一种带同轴激光辅助的静电纺丝射流检测方法。基于光波导传输原理，激光经由光纤传导到同轴针内针出口处与纺丝射流耦合，有效增强了射流与背景的对比度。结合图像处理技术，对比分析有激光辅助和无激光辅助的静电纺丝射流图像的演变规律，并在此基础上探索辅助激光的最佳功率。实验结果表明，同轴激光辅助有助于增强射流的可检测性，最适于射流检测的激光功率为4 mW；在射流稳定阶段，有光辅助下射流平均可视化长度为10.79 mm，无光辅助射流平均可视化长度为5.68 mm，有光辅助下射流可视化长度平均提升了89.81%；对于细小射流，有光辅助下射流平均可视化长度为5.36 mm，无光辅助射流平均可视化长度为3.33 mm，有光辅助下射流可视化长度平均提升了60.74%。因此，引入同轴激光能有效提高静电纺丝射流的可检测性，为微纳喷印的实时检测提供了一种新思路。

A method for detecting electrospinning jets using coaxial laser assistance is proposed to address the challenges of small diameter， high speed， and difficult detection of electrospinning jets. Based on the principle of optical waveguide transmission， laser is transmitted through optical fibers to the exit of a coaxial needle and coupled with an electrospinning jet， which effectively enhances the contrast between the jet and the background. Combined with the image-processing technology， the evolutions of laser- and nonlaser-assisted electrospinning jet images were compared and analyzed. Based on this analysis， the optimal power range of the auxiliary laser was determined. The experimental results show that coaxial laser assistance can enhance jet detectability， and the most suitable laser power for jet detection is 4 mW. In the jet stabilization stage， the average visible lengths of the electrospinning jet with and without light assistance are 10.79 and 5.68 mm， respectively. Compared with nonlight assistance， the visible length of the electrospinning jet increased by 89.81% on average. For a small jet， the visible lengths of the jet with and without light assistance are 5.36 and 3.33 mm， respectively. The visual length of the jet with light assistance increased by 60.74%. Therefore， the introduction of coaxial laser can effectively improve the detectability of electrospinning jets and is a novel approach to the real-time detection for micro/nanospray printing jets.