KR950025449A - Optical fiber mixer / coupler using expansion element of optical fiber and manufacturing method thereof - Google Patents

Abstract

The present invention relates to an optical fiber, and more particularly, to an optical coupler / connector using a core expansion element and a method of manufacturing the same.

Conventional optical couplers and optical connectors have a problem that the manufacturing process is very complicated and requires a high degree of precision because the core is too thin, and thus the unit price is very expensive.

In order to solve the above problems, a core extension element is connected to the core and an optical fiber composed of cladding. The core expansion element is made of a photosensitive material that is formed by changing the physical properties according to the degree of exposure to light, and is located on the end surface of the core in the form of light emitted from the end surface of the core, the maximum diameter of the core expansion element Is larger than the diameter of the core and has a larger refractive index than the surrounding media to totally reflect light inside the core expansion element.

The present invention provides a core extension element extending the core for transmitting light beams and a method of manufacturing the same to facilitate the connection between the core and the core and to produce a coupler and a connector of an optical fiber at low cost by using the core extension element. There is.

Description

Optical fiber mixer / coupler using expansion element of optical fiber and manufacturing method thereof

Since this is an open matter, no full text was included.

3 is a plan view of two optical fibers in which a common core expansion element is formed;

FIG. 5 is a plan view showing how many optical fibers are connected than FIG. 4;

6 is a cross-sectional view taken along line X-X 'in the case where the optical fibers shown in FIG.

FIG. 7 is a sectional view taken along the line Y-Y 'when the optical fibers shown in FIG. 5 are arranged in a linear linear form.

Claims (18)

A core having an end face substantially perpendicular to the traveling direction of the light beam, a cladding surrounding the core, and a core extension element extending from the core, wherein the core extension element is radiated from an end surface of the core. Coupling of the optical fiber, characterized in that the cross-sectional area is gradually widened according to the radiation shape of the core, the maximum diameter is larger than the diameter of the core, the refractive index of the core expansion element is configured to be larger than the refractive index of the external material so that the light is totally reflected inside the core expansion element rescue. The coupling structure of an optical fiber according to claim 1, wherein a maximum diameter of the core expansion element is larger than a diameter of the cladding. The coupling structure of an optical fiber according to claim 1, wherein the cladding is tapered by removing a part of the cladding. The coupling structure of an optical fiber according to claim 1, wherein the core expansion element is made of a photosensitive material whose physical properties change when exposed to light. A plurality of cores having end faces that are substantially perpendicular to the traveling direction of the light beam and substantially parallel to each other, and a plurality of individual core expansion elements formed in one of the cores, wherein the individual core expansion elements Is a conical shape in which the cross-sectional area is gradually enlarged from the end face of the core so that the transmission of the light beam can extend beyond the end face of the core, and the maximum diameter of the conical shape is a common that the individual core extension elements can be combined to mix the light beams. The core expansion element is formed larger than the distance between two adjacent cores, and the core expansion element has a refractive index larger than the refractive index of the peripheral medium of the core expansion element so that light can be totally reflected and embraced therein. An optical fiber mixer. 6. The optical fiber mixer of claim 5, wherein the cores are arranged in a linear linear phase. 6. The optical fiber mixer of claim 5, wherein the cores are arranged in two-dimensional space. 6. The method of claim 5, wherein the common core expansion element is located in a tube, wherein the inner diameter of the tube is less than the maximum possible diameter that the common core expansion element can have if it is not located in the tube, and the refractive index of the tube is the common core. An optical fiber mixer, characterized in that it is lower than the refractive index of the expansion element. 6. The optical fiber mixer as claimed in claim 5, wherein the individual core expansion element and the common core expansion element are components made of a mold. 6. The optical fiber mixer as claimed in claim 5, wherein the individual core expansion element and the common core expansion element are made of a photosensitive material formed by changing physical properties according to the degree of exposure to light. The optical fiber mixer of claim 10, wherein the photosensitive material is a polymer that is solidified by ultraviolet light. 11. The optical fiber mixer of claim 10, wherein the photosensitive material is a photoresist material. The optical fiber mixer according to claim 10, wherein the photosensitive material is a glass raw material whose physical properties change depending on the degree of light exposure. A set of cores having a plurality of cores formed on each of the cores, each of which has a plurality of cores formed in each of the cores, the cores being in close proximity and generally parallel to each other with an end surface generally perpendicular to the direction of travel of the light beam; And a second set of cores having a plurality of cores formed in each of the cores, the plurality of cores having a plurality of cores adjacent to each other and generally parallel to each other and having a generally vertical end surface. The cores of the jaws face each other on the common axis, and the first set of core expansion elements and the second set of core expansion elements are located between the two sets of cores, and the ends of the first and second sets of cores are conical. Core extension elements are formed to extend the waveguide of the light beam from the core, the maximum diameter of the cone is the distance between two neighboring cores An optical fiber coupler, characterized in that a larger core forms a common core expansion element into which light rays are mixed and distributed, and the core expansion element is configured to have a larger refractive index than surrounding media so that light is totally reflected inside. 15. The optical fiber coupler of claim 14, wherein a light transmission medium is inserted into the common core expansion element. 16. The optical fiber coupler of claim 15, wherein the light transmission medium is a lens. Immersing the first end face of the core in a photosensitive material that is formed and changed in physical properties according to the degree of exposure to the light beam; and the light beam irradiating the photosensitive material is incident through the second end face of the core to form a first surface of the core. A method for manufacturing a core expansion device for an optical fiber, comprising: forming a core expansion device, comprising a step of radiating a specific radiation angle from an end surface. 18. The method of claim 17, wherein only a light ray having a small radiation angle is selected from among light rays emitted from the first end surface of the core to minimize the cone angle of the core expansion element. ※ Note: The disclosure is based on the initial application.