A fiber-integrated Fourier transform micro-optic system
A technology integrating Fu and micro-optics, applied in graded index core/clad fibers, clad fibers, etc., can solve the problems of high production cost, complex process, expensive equipment, etc.
Active Publication Date: 2022-05-31
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
Method used
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Embodiment 1
[0071] A schematic cross-sectional view of the step-multimode optical fiber selected in this embodiment is shown in FIG. 5 . 51 is a step-by-step multimode fiber
[0073] The first step is to select the initial parameters of the optical fiber. Including the initial refractive index profile of the fiber, dopant species, numerical aperture
[0074] In the second step, thermal diffusion treatment is performed on the optical fiber. A section of the initial fiber of the microlenses 61, 62 is placed in a constant temperature field.
[0075] The third step is to cut the thermally diffused optical fiber. The thermally diffused microlenses 61 and 62 are cut to a fixed length
[0076] In the fourth step, the two sections of thermally diffused optical fibers are welded. The two sections of microlenses 61 and 62 cut to a fixed length are
[0081] In FIG. 7a, when the microlens 61 transmits 690 μm, the light spot is the smallest, that is, the focal length of the microlens 61 is 690 μm. Fi...
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Abstract
The invention provides a fiber integrated Fourier transform micro-optical system. It is characterized in that it is composed of two sections of optical fiber connections prepared by thermal diffusion and whose refractive index distribution is a circumferentially symmetrical quasi-Gaussian distribution. The fiber-integrated Fourier transform micro-optical system 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 Equivalent to a micro-convex lens. The invention mainly provides a method for constructing an optical fiber microlens, and at the same time constructs a fiber integrated Fourier transform micro-optical system in an optical fiber. The invention can be used for the preparation of fiber-integrated micro-convex lenses, and can be widely used in the fields of micro-endoscopes based on fiber-integrated Fourier transform micro-optical systems, cell-biological optical fiber imaging systems, optical fiber optical tweezers systems, and miniature unmanned aerial vehicles.
Description
A Fiber-Integrated Fourier Transform Micro-Optical System (1) Technical field What the present invention relates to is a kind of fiber-integrated Fourier transform micro-optical system, which can be used for fiber-integrated micro-convex lens can be widely used in micro-endoscopes, cellular bio-optical fibers based on fiber-integrated Fourier transform micro-optical systems The fields of imaging systems, fiber optical tweezers systems, and micro drones belong to the field of fiber integration technology. (2) Background technology Fiber-integrated micro-optical elements have the advantages of small size, light weight, flexible design and manufacture, low manufacturing cost, and easy It realizes the advantages of arraying and mass production, and can realize functions that are difficult to achieve by ordinary optical components. It has important application value in information processing, aerospace, biomedicine, laser technology, optical computing and other fields. ...
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