Throughput type fiber optical tweezers based on coaxial dual-waveguide structure and preparation method

Abstract

The invention provides throughput type fiber optical tweezers based on a coaxial dual-waveguide structure and a preparation method. The throughput type fiber optical tweezers mainly comprise a coaxial double-waveguide microstructure fiber [1], an LD light source with the output wavelength of lambda 1, an LD light source [3] with the output wavelength of lambda 2, a wavelength division multiplexing device [4] and a standard single-mode fiber [5]),wherein the output ends of the light source [2] and the light source [3] are connected with the two input ends of the wavelength division multiplexing device [4]; the output end of the wavelength division multiplexing device [4] is coupled with the coaxial double-waveguide fiber [1]; and the other end of the coaxial double-waveguide fiber [1] is finely ground to obtain the cone structure. The invention controls the particles by utilizing the coaxial double-waveguide fiber, changes the luminous power of the light source by adjustment, and can realize throughput, transmission and resorption of stable trapped particles; and meanwhile, the invention can trap the particles in a more flexible and accurate way, has adjustability, and greatly enhances the practicality of the fiber optical tweezers.

Description

Technical field [0001] The invention relates to a fiber optic tweezers. The invention also relates to a method for preparing optical fiber optical tweezers. Background technique [0002] Optical tweezers are tools that use the gradient force and scattering force of light intensity distribution to capture and manipulate tiny particles. In 1986, Askin proposed a single-beam laser-based three-dimensional optical trap for dielectric particles in the article "Observation of a single-beam gradient force optical trap for dielectric particles", which is used to control the three-dimensional space of particles, because this beam can achieve space The clamping of tiny particles, hence the name "optical tweezers", this article was published in Opt. Lett. 11, 288-290. Since then, optical tweezers technology has developed rapidly, becoming an important research technique, and promoting the rapid development of several intersecting fields. For example: it has been widely used in the fields ...

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Problems solved by technology

Since then, the optical tweezers based on circular multi-core optical fiber has been disclosed, the publication number is CN101236275; and the multi-optical tweezers integrated in a single optical fiber, the publication number is CN101251620 and other new optical tweezers, these new optical tweezers can realize the capture of particles , spatial positioning, and spatial rotation, but no optical tweezers that can emit trapped particles have ever been reported.

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