An optical fiber-based laser-driven macroscopic liquid flow device and method

Abstract

The invention provides a laser-driven macroscopic liquid flow device and method based on optical fiber which is used for solving the problem that macroscopic liquid flow cannot be produced through simple combination of a photoacoustic effect and a sound wave driving fluid effect. According to the laser-driven macroscopic liquid flow device and method based on the optical fiber, nanometer gold particles are injected into one end face of the optical fiber by adopting an injection technology, and fixed and immersed in a driven solution, meanwhile, a nanosecond laser pulse is coupled into the optical fiber from the other end face of the optical fiber, and the laser pulse interacts with the nanometer gold particles injected into the optical fiber; the nanometer gold particles produce ultrasoundunder the effect of laser due to the photoacoustic effect, and meanwhile, a liquid is driven to flow due to the sound wave driving fluid effect; a fixed liquid-liquid interface and a liquid flow channel are needed, special requirements for the flowing liquid and the environment do not exist, the laser-driven macroscopic liquid flow device and method based on optical fiber is suitable for any liquids, tenability of the flow speed and direction of the driven liquid can be achieved, flowing of the driven liquid is monitored on line in real time by adopting a CCD, the control accuracy is improvedgreatly, and operation is convenient and easy.

Description

Technical field [0001] The present invention relates to the technical fields of interdisciplinary subjects such as optoelectronics, acoustics, nanofabrication, fluid dynamics, solid-state mechanics, etc., and can be applied to the fields of laser driving, microfluidics, laser surgical cleaning, transport or liquid mixing, etc. An optical fiber-based laser driving macroscopic liquid flow device and method. Background technique [0002] The birth of the first laser in 1960 marked the entry of optoelectronic technology into a whole new field. However, with the vigorous development of optical technology, traditional solid-state optical devices cannot meet the increasing miniaturization, integration, and tunability of modern optics. The development of technology has brought greater challenges to laser manipulation technology and drive technology, especially the laser-driven liquid flow technology. Laser not only represents high intensity and directionality, but also because photons h...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the technical problem that the simple combination of the photoacoustic effect and the sound wave-driven fluid effect cannot produce macroscopic liquid flow, the present invention proposes a laser-driven macroscopic liquid flow device and method based on an optical fiber. The acoustic effect and the acoustic wave-driven fluid effect are perfectly coupled together. The injection technology is used to inject gold nanoparticles into one end face of the fiber, and at the same time couple the nanosecond laser pulse into the fiber through the other end face of the fiber. The gold nanoparticles injected into the fiber are under the action of the laser. Ultrasonic waves are generated due to the photoacoustic effect, and at the same time, the liquid near the optical fiber is caused to flow due to the sound wave-driven fluid effect, thereby realizing the high-speed flow of macroscopic liquid

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