A fiber-integrated microlens group
A technology of micro-lens and micro-concave lens, which is applied in the direction of cladding optical fiber, graded index core/cladding optical fiber, etc., which can solve the problems of limited application range, complicated process, and difficulty in obtaining
Active Publication Date: 2022-03-25
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology
The third is to use high-precision 3D printing technology to print polymer lenses directly on the fiber end surface in recent years to prepare fiber microlenses. This method can prepare microlenses and microlenses with high precision and high degree of design freedom. arrays, but the required equipment is very expensive and difficult to obtain, and polymer materials have limited its range of applications
The optical waveguide lens can be used for collimation or focusing of light beams, but the lens manufactured by this method has complicated process and high production cost
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Embodiment 1
[0075] The cross-sectional schematic diagram of the step multimode fiber selected in this embodiment, such as Figure 5a shown. 51 is the cladding of the step multimode fiber, and 52 is the core of the step multimode fiber. The cross-sectional schematic diagram of the annular core fiber selected in this embodiment, as shown in Figure 5b shown. 53 is the cladding of the annular core optical fiber, and 54 is the core of the annular core optical fiber.
[0076]The preparation steps of the fiber-integrated microlens group in this embodiment are as follows:
[0077] The first step is to select the initial parameters of the fiber. Including the initial refractive index distribution of the fiber, the type of dopant, the numerical aperture, etc. In this embodiment, a step multimode fiber is selected. The fiber parameters of the micro-convex lens 61 are that the cladding diameter is 125 μm, the core diameter is 62.5 μm, and the numerical aperture is 0.14; the fiber parameters of ...
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Abstract
The invention provides a fiber integrated micro lens group. It is characterized in that it is composed of two optical fiber connections prepared by thermal diffusion, and the refractive index distribution is respectively a circumferentially symmetrical quasi-Gaussian distribution and a circumferentially symmetrical reversed quasi-Gaussian distribution. The fiber-integrated microlens group is made by placing the optical fiber in a constant temperature field, preparing and connecting it through thermal diffusion. After the fiber core dopant is diffused, the refractive index distribution becomes a circumferentially symmetrical quasi-Gaussian distribution, which can be equivalent to a micro Convex lens; the refractive index distribution becomes a circumferentially symmetrical reverse quasi-Gaussian distribution, which can be equivalent to a micro-concave lens. The invention mainly provides a method for constructing an optical fiber micro-lens, and at the same time constructs a fiber-integrated micro-lens group in an optical fiber. The invention can be used for the preparation of fiber-integrated microlenses, and can be widely used in fields such as micro-endoscopes based on fiber-integrated microlens groups, cell-biological optical fiber imaging systems, optical fiber optical tweezers systems, and miniature unmanned aerial vehicles.
Description
(1) Technical field [0001] The invention relates to a fiber-integrated micro-lens group, which can be used for the preparation of fiber-integrated micro-lenses, and can be widely used in micro-endoscopes, cellular biological fiber imaging systems, fiber-optic tweezers systems, micro-endoscopes based on fiber-integrated micro-lenses UAV and other fields belong to the field of fiber integration technology. (2) Background technology [0002] Fiber-integrated micro-optical components have the advantages of small size, light weight, flexible design and manufacturing, low manufacturing cost, and easy to realize array and mass production, and can realize functions that are difficult to achieve by ordinary optical components. It has important application value in aerospace, biomedicine, laser technology, optical computing and other fields. [0003] Generally, there are three types of optical fiber microlenses. The optical fiber microlens that appears at the beginning and is the eas...
Claims
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IPC IPC(8): G02B6/028
CPCG02B6/028
Inventor 苑立波孟令知陈宫傣
Owner GUILIN UNIV OF ELECTRONIC TECH