Particle light operating device based on annular-core coaxial helix waveguide optical fiber

Abstract

The invention relates to a particle light operating device based on an annular-core coaxial helix waveguide optical fiber. The particle light operating device is characterized in that the device comprises the annular-core coaxial helix waveguide optical fiber 1 with the fiber end polished into a fiber end cone frustum; the annular-core coaxial helix waveguide optical fiber 1 comprises a wrapping layer 3, an annular core 4 and a central core 6 consisting of multiple helix waveguides. The device can emit a strong-focusing ring lift field 10 from the fiber end of the annular-core coaxial helix waveguide optical fiber, and realizes stably three-dimensional capture of a particle 11 near the focusing point out of the fiber end, thereby realizing positioning and axis fixing functions to the particle 11; besides, fixed-axis rotation 15 and rotating ejection 16 of the particle 11 can be achieved by controlling energy of a phase vortex beam 14 emitted by the helix core. The particle light operating device can be used for light operation of micro-particles such as particles for optical information transmission, optical micro-operation and microimaging and drug particles, application of optical fiber integration devices and the like.

Description

(1) Technical field [0001] The invention relates to a particle light manipulation device based on a ring-core coaxial helical waveguide fiber, which can be used in the fields of optical information transmission, optical micromanipulation, microscopic imaging, light manipulation of tiny particles such as drug particles, and application of optical fiber integrated devices. . (2) Background technology [0002] The momentum of an electromagnetic field has two components: linear momentum and angular momentum. There are two types of angular momentum: spin angular momentum and orbital angular momentum. In 1992, Allen discovered that the light field has orbital angular momentum, which led to the further study of vortex beams. Since the vortex beam carries orbital angular momentum, its magnitude is Therefore, when the vortex beam is irradiated on the particles, the orbital angular momentum carried by the photons is directly transferred to the particles in micron and submicron ord...

AI Technical Summary

Problems solved by technology

Although the system can achieve stable three-dimensional capture and rotation of particles, the system requires expensive and large spatial optical devices such as spatial light modulators, and its flexibility is not high, making it difficult to implement probe applications

Therefore, the researchers used the few-mode optical fiber tapered fiber-end probe to realize the three-dimensional capture and direction control of yeast cells (Jounal of Lightwave Technol, 2014, 32(6):1098-103), but this system cannot realize the Stable rotation function

In addition, Chen et al. also used the optical fiber LP21 mode to realize the rotation operation of biological cells (Journal of Optics, 2014, 16(12): 125302), but this system cannot form a stable three-dimensional capture of cells

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