TW202300967A - Optical fiber alignment apparatus - Google Patents

Abstract

The invention provides an optical fiber alignment apparatus, shortens a connection time of two optical-fiber elements, and the invention is suitable for application on a variety of optical components that require optical fiber connection.

Description

Fiber Alignment Device

The invention provides an optical fiber alignment device, especially an optical fiber alignment device with a lens optical fiber and a core structure.

The optical fiber can transmit the optical signal from the light source to the desired position. In other words, the role played by the optical fiber in the optical fiber communication system is a transmission medium, that is, the optical fiber has a communication function, and the optical fiber is also a cylindrical dielectric. waveguide.

The composition of the optical fiber contains pure silicon dioxide (SiO2) and germanium dioxide (GeO2), and at the same time doped with a low proportion of the mixture, so that the optical fiber has a very high refractive index (refractive index), and in the optical fiber, it also contains extremely high It is composed of a high refractive index core (Core), a low refractive index (Cladding), and the outermost plastic protective layer (jacket). Therefore, in the field of "ray-optics", optical fiber can be regarded as inside the fiber clothing, the light travels forward in a way of total reflection, and transmits information to achieve the function of communication.

When the light source is coupled into the optical fiber, in addition to smoothing the end face of the optical fiber to avoid light scattering, it is also necessary to cooperate with the numerical aperture (Numerical Aperture, NA) value and modal distribution of the optical fiber to efficiently integrate the light source. After coupling, enter the fiber.

Usually, in optical fiber communication systems, the attenuation of optical signal intensity mainly comes from three types of loss methods: coupling loss, end-face coupling loss, and optical fiber connection loss. Among them, optical fiber connection loss accidents are the most common and occur frequently.

The main reason for the connection loss of the optical fiber is that the optical fiber in the communication system often needs to be spliced, especially to extend or extend to the required position by splicing. causing a lot of loss. The source of the loss may be that the end face is not flat, the alignment is not accurate, or the distance between the two ends is too large, or the two butt-connected optical fibers are bent due to complete contact, resulting in an unimaginably huge loss. When the loss occurs, It will also make the transmitted optical signal completely unable to be transmitted to the next optical fiber, resulting in the failure of the optical fiber to connect.

In order to avoid the loss of optical fiber connection, the industry needs to develop a new type of optical fiber connection technology or device. In addition, due to the use of tiny lenses at the ends of optical fibers in recent years, different types of optical fibers can be connected, so that the lensed optical fiber has a longer working distance and better coupling efficiency. Therefore, the lensed fiber can also be used in a new type of fiber connection technology, and the generation of fiber connection loss can be avoided.

The invention is an optical fiber aligning device, which mainly provides a connecting accessory that can be used easily, so as to complete the optical coupling operation between optical fiber components and optical fiber components.

The invention relates to a structure of an optical fiber alignment device, which includes a lens optical fiber and a fiber core. Wherein the lens fiber has a conical tip with a specific angle, and the core has a specific width.

A usage method of an optical fiber alignment device in the present invention includes providing an optical fiber alignment device, connecting a silicon wafer channel with the optical fiber alignment device, and connecting an optical fiber matrix with the silicon chip channel.

An optical fiber alignment device of the present invention can shorten the connection time of two optical fiber components, and can form a low-loss high-quality optical fiber assembly device, which is suitable for application in various optical components that require optical fiber connection.

An optical fiber alignment device of the present invention is mainly to provide a connecting accessory that can be used easily, so as to complete the optical coupling operation between optical fiber components and optical fiber components.

The optical fiber alignment device of the present invention can simply adjust and correct the accuracy for different optical fiber styles, and can rapidly and accurately improve the optical coupling rate.

The present invention is aimed at different types of optical fibers, and as long as the process technology is used, the manufactured tiny lens optical fibers can have different working distances and coupling efficiencies.

Please refer to the illustration and description of the accompanying drawings below to describe the embodiments of the present invention. In the drawings, the same component symbols represent the same components, and the size or thickness of the components may be exaggerated for clarity.

As shown in FIG. 1 , the structure of an optical fiber alignment device of the present invention includes a lens optical fiber 101 and a core 102 . Wherein the lens fiber 101 has a conical tip, the angle of the tip is 30 degrees, and the width dimension of the tip is a, and the length dimension of the tip is b, in the illustrated embodiment of the present invention, a can be 125 Micron, b can be 233.253 microns, but the width and length of the tip are not limited to the example of this embodiment. In the illustrated embodiment of the present invention, the width of the fiber core 102 is 6 microns (μm), but the width of the fiber core 102 is not limited to the example of this embodiment, and its width can be adjusted corresponding to different fiber types, and The core 102 is located in the middle of the lens fiber 101 .

The structure of an optical fiber alignment device of the present invention as shown in Figure 1 again, because the optical fiber model corresponding to the lens optical fiber 101 is Hi-1060, it is known that the width of the fiber core 102 is 6 microns, and the light source adopts 1064 nanometers (nm) fiber laser, when the present invention is under the light source of 1064 nanometers, the Hi-1060 fiber is single-mode transmission.

As shown in Figure 2, the use of a fiber alignment device of the present invention, the working distance of the lens fiber 101 is about 15 microns, and the silicon-chip channel core of the silicon-chip tunnel (silicon-chip tunnel) 201 is within 3 microns Square, therefore, the input end focuses the 6-micron light source into a 3-micron spot through the lens fiber 101, and couples most of the light energy to the silicon chip channel 201, and then transmits it to the fiber array (fiber array) 202. In other words, a method of using an optical fiber alignment device includes: providing an optical fiber alignment device, connecting a silicon wafer channel 201 with the optical fiber alignment device, and connecting an optical fiber matrix 202 with the silicon chip channel 201 .

As shown in FIG. 2 , the use of an optical fiber alignment device of the present invention, since the length and width of the silicon wafer channel core of the silicon wafer channel 201 is c, and c is a square with a length and width of 3 microns. Through the lens fiber 101 , the 6-micron light is focused into a 3-micron spot through the input end of the silicon chip channel 201 , so as to reduce the mode field diameter and couple most of the light energy to the silicon chip channel 201 . The distribution of waveguides on the silicon chip channel 201 is 1×4, that is, the silicon chip channel 201 has 4 output ports, and the output ports do not need any lens fiber.

As shown in Figure 2, the use of an optical fiber alignment device of the present invention, when the core of the silicon wafer channel is coupled to a 9 micron single-mode optical fiber from the 3 micron of the silicon wafer channel 201, the silicon wafer channel 201 can be output to the optical fiber The receiving end of the matrix 202, and in the illustrated embodiment of the present invention, the fiber matrix 202 is a V-shaped structure, and the width dimension is 125 microns, but the width dimension is not limited to the illustration of this embodiment, and the present invention can be placed in a standard single-mode The optical fiber is more stable in alignment adjustment and correction adjustment, which can improve the efficiency of optical coupling.

Still shown in Figure 2 is the use of an optical fiber alignment device of the present invention. Since the focal length of the lens fiber 101 is only on the order of microns, the present invention can perform alignment adjustment and correction adjustment on a high-precision optical platform, and the optical bracket can be used to Set up the lens fiber 101, fine-tune the alignment with the selected fiber, adjust the working distance, find the focal length of the lens fiber 101, and adjust to the position of the best coupling efficiency, so that the lens fiber 101 and the waveguide mode field can match each other , so as to improve the coupling efficiency of the fiber and the waveguide.

As can be seen from the foregoing, an optical fiber alignment device of the present invention can be applied to the connection of optical fibers, shorten the connection time of two optical fiber components, and can form a low-loss high-quality optical fiber component device, which is suitable for use in various optical fiber connections. On optical components, such as silicon chip channels, or fiber optic matrix, or other high-power laser light sources, but not limited thereto.

An optical fiber alignment device of the present invention is mainly to provide a connecting accessory that can be used easily, so as to complete the optical coupling operation between optical fiber components and optical fiber components. Moreover, the present invention can simply adjust and correct the accuracy of different optical fiber styles, and can quickly and accurately improve the optical coupling rate.

As can be seen from the foregoing, in recent years, the optical path of optical fibers has a tendency to be miniaturized. Correspondingly, in the field of integrated optics of optical fibers, a large number of the aforementioned lens optical fibers can be used, especially by using process technology to manufacture tiny Lens fiber, used at the end of the fiber. For different types of optical fibers, as long as the process technology is used, the manufactured tiny lensed optical fibers can have different working distances and coupling efficiencies.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention; all other equivalent changes or modifications that do not deviate from the spirit disclosed in the present invention should be included in the following within the scope of the patent application.

101: Lens fiber 102: Fiber core 201:Silicon chip channel 202: Optical fiber matrix

The aforementioned and many other advantages of the present invention will be more clearly presented in the following detailed description of a preferred embodiment with reference to the drawings, wherein it is as follows: Fig. 1 shows the structure of a kind of optical fiber alignment device of the present invention; Fig. 2 shows the usage mode of an optical fiber alignment device of the present invention;

101: Lens fiber

102: Fiber core

Claims (7)

A fiber alignment device comprising: a lensed fiber, wherein the lensed fiber has a conical tip with a specific angle; and A fiber core is located at a middle part of the lens fiber. The fiber core as described in claim 1, wherein the fiber core has a specific width. The fiber core as described in item 2 of the scope of the patent application, wherein the specific width can be adjusted corresponding to different fiber types. A method of using an optical fiber alignment device, comprising: providing an optical fiber alignment device; splicing a silicon wafer channel with the fiber alignment device; and A fiber optic matrix is connected with the silicon chip channel. The fiber core as described in item 4 of the scope of the patent application, wherein the fiber alignment device has a lens fiber and a fiber core. The fiber core as described in claim 5, wherein the fiber core has a specific width. The fiber core described in item 6 of the scope of the patent application, wherein the specific width can be adjusted corresponding to different fiber types.

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