Quantitative microfluidic delivery based on an optical breakdown-driven micro-pump for the fabrication of fiber functional devices

An optical breakdown-driven micro-pump was reported to deliver the quantitative liquid to the fiber microstructure efficiently. The amount of the pumped liquid can be controlled by adjusting the irradiation time of the femtosecond laser pulses. Such a method of microfluidic delivery has potential for the fabrication of fiber functional devices and the rapid injection of analytes into a lab-in-fiber for chemical and biological analysis. As a demonstration, a fiber spirit level based on a mobile microbubble was achieved by pumping nanoliter scale liquid into a fiber micro-cavity with this method.