High-performance polarization-maintaining array lens assembly

Abstract

The utility model discloses a high-performance polarization-maintaining array lens assembly, and the assembly comprises a lens array which is used for converging parallel optical signals of all channels, enlarging a coupling flat region during terminal coupling, and reducing the coupling difficulty; the reflecting prism is arranged at the light path emergent end of the lens array, and the reflecting prism is used for changing the light path transmission direction; the total internal reflection surface of the reflection prism is internally plated with a polarization beam-splitting dielectric film, the polarization beam-splitting prism is glued outside the corresponding position of the reflection prism, and the polarization beam-splitting prism reflects S polarized light and projects to remove P polarized light. According to the invention, while the parallel polarized light path packaging design is realized, the integration level is improved, and the process difficulty is reduced; the use of the polarization splitting prism not only meets the requirement of transmission on polarized light, but also can avoid the power loss which is increased due to the additional installation of a polarizing film.

Description

Technical Field

[0001] The utility model relates to the technical field of optical communication silicon light and CPO coupling, in particular to a high-performance polarization-maintaining array lens component. Background Art

[0002] In the transmission system of optical communication, the use of polarization-maintaining (PM) light can reduce signal distortion and noise caused by polarization changes. Figure 1 ), usually requires multiple components to achieve stable transmission and coupling of polarization-maintaining optical signals. Its shortcomings include: it cannot meet the development of miniaturization and high density of optical modules; the number of components is large and the assembly is complex, which increases the manufacturing cost and difficulty and reduces the consistency and reliability of the system; the angle deviation of the polarizer assembly and the polarizer itself will cause additional coupling loss to the system.

[0003] To this end, the utility model provides a high-performance polarization-maintaining array lens assembly to solve the above technical problems. Utility Model Content

[0004] Purpose of the utility model: To solve the problem that the existing technology cannot meet the development of miniaturization and high density of optical modules in the application of polarization-maintaining light; the number of components is large and the assembly is complex, which increases the manufacturing cost and difficulty and reduces the consistency and reliability of the system; the angle deviation of the polarizer assembly and the polarizer itself will cause additional coupling loss to the system.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high-performance polarization-maintaining array lens assembly, comprising:

[0007] A lens array, wherein the lens array is used to converge parallel optical signals of each channel and increase the coupling flat area during terminal coupling;

[0008] A reflecting prism, the reflecting prism is arranged at the light path exit end of the lens array, and the reflecting prism is used to change the transmission direction of the light path;

[0009] A polarization beam splitter prism is provided. A polarization beam splitter medium film is plated inside the total internal reflection surface of the reflecting prism. The polarization beam splitter prism is glued to the outside of the corresponding position of the reflecting prism. The polarization beam splitter prism reflects S polarized light and projects and removes P polarized light.

[0010] Furthermore, the lens array and the reflective prism are bonded together by refractive index matching glue.

[0011] Furthermore, the position, length or shape of the polarization beam splitter prism can be selected to be longer or shorter or in different shapes, and the size of the polarization beam splitter medium film is the same as the contact surface between the polarization beam splitter and the reflective prism.

[0012] Furthermore, the lens array and the reflective prism are designed to be separated to match the optical path design requirements.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] By combining array microlenses, reflective prisms, and polarization beam splitter prisms together, the parallel polarization light path packaging design is realized, while the integration is improved and the process difficulty is reduced.

[0015] The use of polarization beam splitter (PBS) can not only meet the transmission requirements for polarized light, but also avoid the unnecessary power loss caused by the additional installation of polarizing plates.

[0016] The position, length or shape of the polarization beam splitter can be freely selected to meet the requirements of different numbers of polarization-maintaining transmission channels. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the utility model;

[0019] Figure 3 It is a structural schematic diagram of replacing the size of the polarization beam splitter prism in the utility model;

[0020] Figure 4 It is a schematic diagram of the structure of replacing the shape of the polarization beam splitter prism in the utility model;

[0021] Figure 5 It is a schematic diagram of the separation structure of the utility model;

[0022] Figure 6 This is a working principle diagram of the utility model.

[0023] In the figure: 1. lens array; 2. reflecting prism; 3. polarization splitting dielectric film; 4. polarization splitter. DETAILED DESCRIPTION

[0024] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0025] The applicant believes that the existing technology cannot meet the development of miniaturization and high density of optical modules in the application of polarization-maintaining light; the large number of components and complex assembly increase the manufacturing cost and difficulty and reduce the consistency and reliability of the system; the angular deviation of the polarizer assembly and the polarizer itself will cause additional coupling loss to the system.

[0026] To this end, the applicant designed Figure 1-6 A high-performance polarization-maintaining array lens assembly is shown, comprising: a lens array 1, which is used to converge parallel optical signals of each channel, increase the coupling flat area during terminal coupling, and reduce the coupling difficulty; a reflective prism 2, which is arranged at the optical path exit end of the lens array 1, and is used to change the transmission direction of the optical path; a refractive index matching glue, which is used to bond the lens array 1 and the reflective prism 2; the refractive index matching glue is selected to have a refractive index that does not affect the optical path or a glue that matches the refractive index, such as high-refractive index adhesive 4003T1 ultraviolet visible light curing adhesive; a polarization beam splitter prism, in which a polarization beam splitter medium film 3 is plated on the total internal reflection surface of the reflective prism 2, and a polarization beam splitter prism is glued to the outside of the corresponding position of the reflective prism 2, and the polarization beam splitter prism reflects S-polarized light and projects and removes P-polarized light. The lens array 1, the reflective prism 2 and the polarization beam splitter prism are combined into a whole, which reduces the number of components, simplifies the coupling process, reduces the manufacturing difficulty and cost, and reduces the additional coupling loss caused by the additional installation of polarizers through optimized structure and coating treatment, thereby improving the overall coupling efficiency.

[0027] like Figure 3 , Figure 4 As shown, the high-performance polarization-maintaining array lens assembly of this embodiment is further optional, and the position and length or shape of the polarization splitter prism can be selected according to needs. A longer or shorter size or a different shape, such as a rectangular parallelepiped, can be selected. The size of the polarization splitter medium film 3 is the same as the contact surface size of the polarization splitter 4 and the reflecting prism 2.

[0028] like Figure 5 As shown, the high-performance polarization-maintaining array lens assembly of this embodiment can further be designed as a separate form of the lens array 1 and the reflective prism 2 to match the optical path design requirements.

[0029] like Figure 6 As shown, on the left is a multi-channel array optical fiber (FAU) for connecting the laser; on the lower right is a PIC chip for light receiving; in the middle is the polarization-maintaining multi-channel array lens in this application.

[0030] The light received from the optical port is connected to the present invention through an array optical fiber, wherein the channel requiring polarized light is separated into S light through a polarization beam splitter prism, that is, it is deflected at a certain angle by a reflective prism 2 and irradiated to the PIC target area, and the P light is separated from the optical path system. For the remaining channels that do not require polarized light, the optical path is normally reflected by the reflective prism 2 and irradiated to the target area, realizing precise polarization control of light from different channels.

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A high-performance polarization-maintaining array lens assembly, characterized in that: include: A lens array, wherein the lens array is used to converge parallel optical signals of each channel and increase the coupling flat area during terminal coupling; A reflecting prism, the reflecting prism is arranged at the light path exit end of the lens array, and the reflecting prism is used to change the transmission direction of the light path; A polarization beam splitter prism is provided. A polarization beam splitter medium film is plated inside the total internal reflection surface of the reflecting prism. The polarization beam splitter prism is glued to the outside of the corresponding position of the reflecting prism. The polarization beam splitter prism reflects S polarized light and projects and removes P polarized light.

2. A high performance polarization-maintaining array lens assembly according to claim 1, characterized in that: The lens array and the reflecting prism are bonded by refractive index matching glue.

3. A high performance polarization-maintaining array lens assembly according to claim 1, characterized in that: The position, length or shape of the polarization beam splitter prism can be selected to be longer or shorter or in different shapes. The size of the polarization beam splitter medium film is the same as the contact surface between the polarization beam splitter and the reflective prism.

4. The high performance polarization-maintaining array lens assembly according to claim 1, characterized in that: The lens array and the reflecting prism are designed to be separated to match the optical path design requirements.

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