阅读说明：本技术 一种c型非球面透镜及带有该透镜的光纤耦合器 (C-shaped aspheric lens and optical fiber coupler with same ) 是由 崔王斌 于 2021-09-24 设计创作，主要内容包括：本发明公开了一种C型非球面透镜,包括透明状基圆,该基圆的一端面设置为倾斜的楔形斜面端,另一端面则设置为非球面端。本发明中用于光纤耦合器的透镜设置为C型非球面透镜,其一端面为楔形斜面,另外一端面则设置为非球面,并且设置该非球面的具体方程式以及赋予具体数值,经过试验验证,现有技术中的球面透镜或非球面透镜的信息损耗值普遍在0.2-0.3dB,而使用本发明的透镜,其信息损耗值仅在0.05dB左右,信息损耗的幅度大大降低,可真正用于5G技术,发挥5G技术的特点,并且可进一步用于6G技术,而且本发明的透镜大小适中,安装方便,非常适合推广生产。(The invention discloses a C-shaped aspheric lens which comprises a transparent base circle, wherein one end face of the base circle is set to be an inclined wedge-shaped inclined plane end, and the other end face of the base circle is set to be an aspheric end. The lens used for the optical fiber coupler is a C-shaped aspheric lens, one end face of the lens is a wedge-shaped inclined plane, the other end face of the lens is an aspheric surface, a specific equation of the aspheric surface is set, specific numerical values are given, and experiments prove that the information loss value of a spherical lens or an aspheric lens in the prior art is generally 0.2-0.3 dB.)

1. A C-type aspheric lens characterized by: the non-spherical base circle comprises a transparent base circle (1), one end face of the base circle (1) is an inclined wedge-shaped inclined plane end (2), and the other end face of the base circle is an aspheric surface end (3).

2. A C-type aspheric lens as defined in claim 1, characterized in that: the equation of the non-spherical end (3) of the base circle (1) is as follows:

wherein R is the radius of the base circle (1), K is the aspheric coefficient, A₂、A₄、A₆、A₈And A₁₀All are aspheric high-order term coefficients, and Y is a high-order term parameter.

3. A C-type aspheric lens as defined in claim 2, characterized in that: the radius R of the base circle (1) is set to be 1.5-2 mm; the K value is set to-0.129 to-0.197; a is described₂The value is set to be 2.01-2.98E-04; a is described₄The value is set to be 2.01-2.89E-03; a is described₆The value is set to-3.59 to-4.78E-03; a is described₈The value is set to-0.003 to-0.11; a is described₁₀The value is set to-0.001 to-0.11; the Y value is set to be 0-0.90 according to an equation.

4. A C-type aspheric lens as defined in claim 1, characterized in that: the wedge angle of the wedge-shaped inclined plane end (2) of the base circle (1) is set to be 7.2-9.3 degrees; the center thickness of the base circle (1) is set to be 3.2-4.8 mm.

5. An optical fiber coupler having the aspheric lens of C-type of any one of claims 1-4, characterized in that: the optical fiber connector comprises two C-shaped aspheric lenses (4) which are correspondingly arranged, aspheric ends (3) of the two C-shaped aspheric lenses (4) are located on the inner sides and correspondingly arranged, wedge-shaped inclined plane ends (2) of the two C-shaped aspheric lenses (4) are located on the outer sides, the wedge-shaped inclined plane ends (2) located on the outer sides are further provided with optical filters (5) which are correspondingly attached, and optical fibers (6) are correspondingly connected on the optical filters (5) on the two sides.

6. The fiber optic coupler of claim 5, wherein: the outer portions of the two C-shaped aspheric lenses (4) are further wrapped by outer glass sleeves (7), the two C-shaped aspheric lenses (4) on the inner sides are fixed through the outer glass sleeves (7), fixed glass sleeves (8) are further mounted on two sides of the outer glass sleeves (7), and the optical filter (5) and the optical fiber (6) are fixed through the fixed glass sleeves (8) on the two sides.

Technical Field

The invention relates to the technical field of 5G optical fibers, in particular to a C-shaped aspheric lens and an optical fiber coupler with the same.

Background

In the existing optical fiber technology, the rapid development can be said from 4G to 5G, the 5G speed is 10 times of 4G, the gigabit rate can be reached, the network stability is low, the time delay reaches millisecond level, is one fifth of 4G, even is lower, the connection capacity of 5G is larger, the maximum connection number per square meter is 10 times of 4G, and the universal interconnection can be realized.

In the prior art, 5G information transmission still depends on optical fibers for transmission, the optical fibers are connected through a coupler, the most important component in the optical fiber coupler is a lens for transmitting information inside, and one end surface of the existing commonly used lens structure is an inclined surface for mounting an optical filter and the optical fibers; the other end face is usually set to be a spherical surface, and the information loss of the spherical structure is tested to be 0.2-0.3db, although the normal use is not influenced, the loss value is still large, especially when the spherical structure is used in the 5G technology, the loss is too large to be really suitable for the 5G technology. )

Disclosure of Invention

The invention aims to provide a C-shaped aspheric lens and an optical fiber coupler with the same, aiming at the defects in the prior art.

The technical scheme is as follows: the technical scheme adopted by the invention for solving the problems is as follows: a C-shaped aspheric lens comprises a transparent base circle, one end face of the base circle is provided with an inclined wedge-shaped inclined plane end, and the other end face of the base circle is provided with an aspheric end.

Further, the equation for the base circle aspheric end is as follows:

wherein R is the radius of the base circle 1, K is the aspheric surface coefficient, A₂、A₄、A₆、A₈And A₁₀All are aspheric high-order term coefficients, and Y is a variable value in an equation.

Further, the radius R of the base circle is set to be 1.5-2 mm; the K value is set to-0.129 to-0.197; a is described₂The value is set to be 2.01-2.98E-04; a is described₄The value is set to be 2.01-2.89E-03; a is described₆The value is set to-3.59 to-4.78E-03; a is described₈The value is set to-0.003 to-0.11; a is described₁₀The value is set to-0.001 to-0.11; the Y value is set to be 0-0.90 according to an equation.

Further, the wedge angle of the base circle wedge-shaped inclined plane end is set to be 7.2-9.3 degrees; the center thickness of the base circle is set to be 3.2-4.8 mm.

The invention also provides an optical fiber coupler with the C-shaped aspheric lens, which comprises two C-shaped aspheric lenses which are correspondingly arranged, the aspheric ends of the two C-shaped aspheric lenses are correspondingly arranged at the inner sides, the wedge-shaped inclined plane ends of the two C-shaped aspheric lenses are respectively arranged at the outer sides, the wedge-shaped inclined plane ends at the outer sides are respectively provided with an optical filter which is correspondingly attached, and the optical filters at the two sides are respectively and correspondingly connected with the optical fibers.

Furthermore, the outer parts of the two C-shaped aspheric lenses are wrapped by outer glass sleeves, the two C-shaped aspheric lenses on the inner sides are fixed through the outer glass sleeves, the two sides of each outer glass sleeve are provided with fixed glass sleeves, and the optical filter and the optical fiber are fixed through the fixed glass sleeves on the two sides.

Has the advantages that: compared with the prior art, the invention has the following advantages: the lens used for the optical fiber coupler is a C-shaped aspheric lens, one end face of the lens is a wedge-shaped inclined plane, the other end face of the lens is an aspheric surface, a specific equation of the aspheric surface is set, specific numerical values are given, and experiments prove that the information loss value of a spherical lens or an aspheric lens in the prior art is generally 0.2-0.3 dB.

Drawings

FIG. 1 is a schematic diagram of a C-shaped aspherical lens of the present invention;

fig. 2 is a structural view of an optical fiber coupler according to the present invention.

Detailed Description

The present invention will be further illustrated with reference to the accompanying drawings and specific examples, which are carried out on the premise of the technical solution of the present invention, and it should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.

Example 1

As shown in fig. 1, a C-type aspheric lens includes a transparent base circle 1, one end face of the base circle 1 is set as an inclined wedge-shaped bevel end 2, and the other end face is set as an aspheric end 3; in the embodiment, the wedge angle of the wedge-shaped inclined plane end 2 of the base circle 1 is set to be 7.2-9.3 degrees; the central thickness of the base circle 1 is set to be 3.2-4.8 mm; and the equation of the aspheric end 3 is as follows:

in the equation, R is the radius of the base circle 1, K is the aspheric coefficient, A₂、A₄、A₆、A₈And A₁₀All are aspheric high-order term coefficients, and Y is a variable value in an equation. (supplementary means).

In the embodiment, the radius R of the base circle 1 is set within the range of 1.5-2 mm; the K value is set to be in a range of-0.129 to-0.197; a. the₂The setting range of the value is 2.01-2.98E-04; a. the₄The setting range of the value is 2.01-2.89E-03; a. the₆The setting range of the value is-3.59-4.78E-03; a. the₈The setting range of the value is-0.003 to-0.11; a. the₁₀The setting range of the value is-0.001 to-0.11; the Y value is set to be 0-0.90 according to an equation.

Specifically, in the present embodiment, the radius R of the base circle 1 is specifically set to 1.85; the value of K is set to-0.162; a is described₂The value is set to 2.11E-04; a is described₄The value is set to 2.52E-03; a is described₆The value is set to-4.23E-03; a is described₈The value was set to-0.025; a is described₁₀The value is set to 0.

The set numerical values are given to an equation of the aspheric end, a specific aspheric structure can be obtained, the C-shaped aspheric lens 4 is installed in the optical fiber coupler, the aspheric ends 3 of the two C-shaped aspheric lens 4 are correspondingly arranged at the inner sides, the wedge-shaped inclined plane ends 2 of the two C-shaped aspheric lens 4 are both arranged at the outer sides, the wedge-shaped inclined plane ends 2 at the outer sides are both provided with optical filters 5 which are correspondingly attached, and the optical filters 5 at the two sides are both correspondingly connected with optical fibers 6; the corresponding positions of the two C-type aspherical lenses 4 are set.

The outer parts of the two C-shaped aspheric lenses 4 are further wrapped by outer-layer glass sleeves 7, the two C-shaped aspheric lenses 4 on the inner sides are fixed through the outer-layer glass sleeves 7, fixed glass sleeves 8 are further mounted on two sides of the outer-layer glass sleeves 7, and the optical filter 5 and the optical fiber 6 are fixed through the fixed glass sleeves 8 on the two sides.

The whole optical fiber coupler is arranged, and a comparative test can be carried out by the optical fiber coupler of the embodiment and the spherical lens in the prior art, and the test results are as follows:

TABLE 1

As can be seen from Table 1, in the spherical equation and the aspherical equation of the prior art, the loss value of the signal passing through the optical fiber coupler is 0.2-0.3dB, while in the optical fiber coupler in the present embodiment, the loss value is only 0.05dB, and the information loss is greatly reduced.

The lens used for the optical fiber coupler is a C-shaped aspheric lens, one end face of the lens is a wedge-shaped inclined plane, the other end face of the lens is an aspheric surface, a specific equation of the aspheric surface is set, specific numerical values are given, and experiments prove that the information loss value of a spherical lens or an aspheric lens in the prior art is generally 0.2-0.3 dB.

The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the invention and the appended claims, and all equivalent changes and modifications made within the spirit and scope of the invention as claimed should be included in the appended claims.