Coupling lens assembly and optical module

Abstract

The utility model belongs to the technical field of optical modules, and particularly relates to a coupling lens assembly and an optical module, the coupling lens assembly comprises a lens substrate, one end, close to an optical port of the optical module, of the top surface of the lens substrate is recessed downwards to form a step structure, and a Mini-MT insertion core is arranged on a step plane of the step structure; a first groove is formed in the bottom face of the lens base body, a Vcsel chip, a Drive chip, a PD chip and a TIA chip are arranged in the first groove, the Drive chip and the TIA chip are arranged at the end close to an optical port of the optical module side by side, and the Vcsel chip and the PD chip are arranged at the end close to an electric port of the optical module side by side. According to the utility model, the Mini-MT insertion core is arranged on the step structure of the lens base body, the Vcsel chip and the Drive chip are arranged side by side at one end, close to the optical port of the optical module, below the lens base body, and the Vcsel chip and the PD chip are arranged side by side at one end, close to the electrical port of the optical module, below the lens base body. The packaging space occupied by the electric chip coincides with the space occupied by the Mini-MT insertion core, so that the overall packaging size of the optical device is compressed, and the integration level of the optical module is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical modules, and in particular relates to a coupling lens component and an optical module. Background Art

[0002] Multimode optical modules are widely used in data centers and are developing towards high speed and low power consumption. As the packaging integration of optical modules increases, the design space of optical devices becomes smaller and smaller, and it becomes urgent to improve the packaging integration of optical devices. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a coupling lens assembly and an optical module, which can reduce the overall size of the optical device package and improve the integration of the optical module.

[0004] To achieve the above-mentioned purpose, the technical solution of the utility model is a coupling lens assembly, including a lens base, the top surface of the lens base is concave at one end close to the optical port of the optical module to form a step structure, and a Mini-MT ferrule is arranged on the step plane of the step structure; a first groove is arranged on the bottom surface of the lens base, and a Vcsel chip, a Drive chip, a PD chip and a TIA chip are arranged in the first groove, the Drive chip and the TIA chip are arranged side by side at one end close to the optical port of the optical module, and the Vcsel chip and the PD chip are arranged side by side at one end close to the electrical port of the optical module.

[0005] As one of the implementation modes, a second groove is arranged on the side surface of the step of the step structure, and a row of first hemispherical protrusions is arranged in the second groove.

[0006] As one of the implementation modes, the Mini-MT ferrule is provided with a plurality of optical fiber jacks corresponding one-to-one to the first hemispherical protrusions.

[0007] As one of the implementation modes, both ends of the step side surface of the step structure are provided with limit blocks, and the spacing between the limit blocks at both ends matches the width of the Mini-MT ferrule plug-in end.

[0008] As one of the implementation modes, a positioning column is further provided on the side surface of the step structure, and a positioning hole matching with the positioning column is provided on the Mini-MT ferrule.

[0009] As one of the implementation modes, a row of second hemispherical protrusions is disposed on the top surface of the first groove, and the Vcsel chip and the PD chip are disposed below the second hemispherical protrusions.

[0010] As one of the implementation modes, a third groove is provided on the top surface of the lens substrate near one end of the optical module electrical port, the third groove is located above the second hemispherical protrusion, and the side wall of the third groove near the Mini-MT ferrule is an inclined surface.

[0011] The utility model also provides an optical module, including a circuit board, a DSP chip, two MT ferrules, and also includes the coupling lens assembly described in any of the above items, the lens substrate, the Drive chip, the TIA chip, the Vcsel chip, the PD chip, and the DSP chip are all arranged on the circuit board, and the connecting ends of the Mini-MT ferrules are respectively connected to the two MT ferrules through optical fibers.

[0012] As one of the implementation modes, two coupling lens assemblies are arranged on the circuit board, and the two coupling lens assemblies are arranged in sequence along the direction from the optical port to the electrical port.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model arranges the Mini-MT ferrule on the step structure of the lens substrate, arranges the Vcsel chip and the Drive chip side by side at one end below the lens substrate close to the optical port of the optical module, and arranges the Vcsel chip and the PD chip side by side at one end below the lens substrate close to the electrical port of the optical module, so that the packaging space occupied by the electrical chip overlaps with the space occupied by the Mini-MT ferrule, thereby compressing the overall size of the optical device package, which is beneficial to improving the integration of the optical module. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the structure of a coupling lens assembly provided in an embodiment of the utility model;

[0017] Figure 2 A schematic diagram of the bottom surface of a coupling lens assembly provided by an embodiment of the utility model;

[0018] Figure 3 A schematic diagram of the top surface of a lens substrate provided in an embodiment of the utility model;

[0019] Figure 4 A schematic diagram of the bottom surface of a lens substrate provided in an embodiment of the utility model;

[0020] Figure 5 A top view of an optical module provided by an embodiment of the utility model;

[0021] Figure 6 A side view of an optical module provided by an embodiment of the utility model;

[0022] In the figure: 1. lens substrate; 11. first groove; 12. second groove; 13. limit block; 14. positioning column; 15. second hemispherical protrusion; 16. third groove; 2. Mini-MT ferrule; 3. Drive chip; 4. Vcsel chip; 5. PD chip; 6. TIA chip; 7. circuit board; 8. DSP chip; 9. MT ferrule. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0026] like Figure 1-Figure 4As shown, this embodiment provides a coupling lens assembly, including a lens substrate 1, the top surface of the lens substrate 1 is concave at one end close to the optical port of the optical module to form a step structure, and a Mini-MT ferrule 2 is arranged on the step plane of the step structure; a first groove 11 is arranged on the bottom surface of the lens substrate 1, and a Vcsel chip 4, a Drive chip 3, a PD chip 5 and a TIA chip 6 are arranged in the first groove 11, the Drive chip 3 and the TIA chip 6 are arranged side by side at one end close to the optical port of the optical module, and the Vcsel chip 4 and the PD chip 5 are arranged side by side at one end close to the electrical port of the optical module. In this embodiment, the Mini-MT ferrule 2 is arranged on the step structure of the lens substrate 1, and the Vcsel chip 4 and the Drive chip 3 are arranged side by side at one end of the lens substrate 1 near the optical port of the optical module, and the Vcsel chip 4 and the PD chip 5 are arranged side by side at one end of the lens substrate 1 near the electrical port of the optical module, so that the packaging space occupied by the electrical chip overlaps with the space occupied by the Mini-MT ferrule 2, thereby compressing the overall size of the optical device package, which is beneficial to improving the integration of the optical module.

[0027] like Figure 1 and Figure 2 As shown, the Drive chip 3 and the TIA chip 6 are arranged on one side of the first groove 11 close to the optical port direction and below the Mini-MT ferrule 2, the Vcsel chip 4 and the PD chip 5 are arranged on one side of the first groove 11 close to the electrical port direction, and the Drive chip 3 is arranged opposite to the Vcsel chip 4, and the TIA chip 6 is arranged opposite to the PD chip 5, so that both the optical chip and the electrical chip are packaged below the lens substrate 1, so that the overall packaging size of the optical device is compressed by at least 4 mm.

[0028] In this embodiment, a second groove 12 is provided on the side surface of the step structure, and a row of first hemispherical protrusions is provided in the second groove 12. Part of the first hemispherical protrusions are used as focusing lenses in the emission light path to focus the parallel light reflected by the inclined surface of the lens substrate 1 to one point; part of the second hemispherical protrusions 15 are used as collimating lenses in the receiving light path to convert the received non-parallel light into parallel light.

[0029] Furthermore, the Mini-MT ferrule 2 is provided with a plurality of optical fiber jacks corresponding to the first hemispherical protrusions one by one, wherein the optical fiber jacks penetrate the Mini-MT ferrule 2 in the direction from the optical port to the electrical port.

[0030] In one of the embodiments, limit blocks 13 are provided at both ends of the step side surface of the step structure, and the spacing between the limit blocks 13 at both ends matches the width of the plug-in end of the Mini-MT ferrule 2 to ensure that the Mini-MT ferrule 2 can be stably and accurately inserted into the lens substrate 1.

[0031] Furthermore, a positioning column 14 is provided on the side of the step structure, and a positioning hole matching with the positioning column 14 is provided on the Mini-MT ferrule 2. Figure 1 and Figure 3 As shown, two positioning posts 14 are provided on the side of the step, and the two positioning posts 14 are respectively located on both sides of the second groove 12; two positioning holes are provided on the Mini-MT ferrule 2, and the two positioning holes correspond to the two positioning posts 14 one by one and match each other, so that the Mini-MT ferrule 2 and the lens substrate 1 can be accurately aligned and connected.

[0032] In this embodiment, a row of second hemispherical protrusions 15 are arranged on the top surface of the first groove 11, and the Vcsel chip 4 and the PD chip 5 are arranged below the second hemispherical protrusions 15. Part of the second hemispherical protrusions 15 are located above the Vcsel chip 4, and are used as collimating lenses in the emission light path to convert the non-parallel light emitted by the Vcsel chip 4 into parallel light; part of the second hemispherical protrusions 15 are located above the PD chip 5, and are used as focusing lenses in the receiving light path to focus the parallel light reflected by the inclined surface of the lens substrate 1 to a point.

[0033] like Figure 3 and Figure 4 As shown, a third groove 16 is provided on the top surface of the lens substrate 1 near one end of the optical module electrical port, and the third groove 16 is located above the second hemispherical protrusion 15, and the side wall of the third groove 16 near the Mini-MT ferrule 2 is an inclined surface. The third groove 16 is located above the second hemispherical protrusion 15, and the inclined surface is set as a reflection surface, which is used to refract the parallel light collimated by the second hemispherical protrusion 15 in the emission light path to the first hemispherical protrusion in the emission light path, and to refract the parallel light collimated by the first hemispherical protrusion in the receiving light path to the second hemispherical protrusion 15 in the receiving light path. Specifically, the inclined surface is a 45° reflection surface.

[0034] In this embodiment, the positioning column 14, the limiting block 13, the first hemispherical protrusion, and the second hemispherical protrusion 15 can be integrally formed with the lens substrate 1, and can be specifically made of PEI material.

[0035] The utility model also provides an optical module, including a circuit board 7, a DSP chip 8, two MT ferrules 9, and also includes a coupling lens assembly as described in any of the above items, wherein the lens substrate 1, the Drive chip 3, the TIA chip 6, the Vcsel chip 4, the PD chip 5, and the DSP chip 8 are all arranged on the circuit board 7, and the connecting ends of the Mini-MT ferrule 2 are respectively connected to the two MT ferrules 9 through optical fibers.

[0036] In this embodiment, the bottom surface of the lens base 1 is fixed on the circuit board 7, the DSP chip 8 is arranged on the side of the lens base 1 close to the electrical port of the optical module, the first groove 11 of the lens base 1 and the circuit board 7 form a packaging cavity, and the Vcsel chip 4, the Drive chip 3, the PD chip 5 and the TIA chip 6 are packaged in the packaging cavity. Optimally, a protective cover is also arranged on the lens base 1.

[0037] The optical module of this embodiment adopts the above coupling lens assembly to compress the overall package size of the optical device by at least 4 mm, which can achieve more efficient optoelectronic conversion and data transmission in a limited space, and meet the requirements of 800G QSFP-DD optical module for high performance and high integration.

[0038] In one embodiment, two coupling lens assemblies are disposed on the circuit board 7, and the two coupling lens assemblies are sequentially disposed along the direction from the optical port to the electrical port. Figure 5 and Figure 6 As shown in the figure, the size of the coupling lens assembly package is reduced, so that the packaging integration of the optical device is higher, and the signal transmission distance can be shortened, and the loss of the optical signal during the transmission process can be reduced.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A coupling lens assembly, comprising a lens substrate, characterized in that: The top surface of the lens substrate is recessed at one end close to the optical port of the optical module to form a step structure, and a Mini-MT ferrule is arranged on the step plane of the step structure; a first groove is arranged on the bottom surface of the lens substrate, and a Vcsel chip, a Drive chip, a PD chip and a TIA chip are arranged in the first groove, the Drive chip and the TIA chip are arranged side by side at one end close to the optical port of the optical module, and the Vcsel chip and the PD chip are arranged side by side at one end close to the electrical port of the optical module.

2. The coupling lens assembly according to claim 1, wherein: A second groove is arranged on the side surface of the step of the step structure, and a row of first hemispherical protrusions is arranged in the second groove.

3. The coupling lens assembly as claimed in claim 2, characterized in that: The Mini-MT ferrule is provided with a plurality of optical fiber jacks corresponding one-to-one to the first hemispherical protrusions.

4. The coupling lens assembly according to claim 1, wherein: Limiting blocks are arranged at both ends of the step side surface of the step structure, and the spacing between the limiting blocks at both ends matches the width of the Mini-MT ferrule plug-in end.

5. The coupling lens assembly as claimed in claim 4, characterized in that: A positioning column is also provided on the side surface of the step structure, and a positioning hole matching with the positioning column is provided on the Mini-MT ferrule.

6. The coupling lens assembly according to claim 1, wherein: A row of second hemispherical protrusions is arranged on the top surface of the first groove, and the Vcsel chip and the PD chip are arranged below the second hemispherical protrusions.

7. The coupling lens assembly according to claim 6, wherein: A third groove is provided at one end of the top surface of the lens substrate close to the electrical port of the optical module. The third groove is located above the second hemispherical protrusion, and the side wall of the third groove close to the Mini-MT ferrule is an inclined surface.

8. An optical module, comprising a circuit board, a DSP chip, and two MT ferrules, characterized in that: It also includes the coupling lens assembly according to any one of claims 1 to 7, wherein the lens substrate, the Drive chip, the TIA chip, the Vcsel chip, the PD chip, and the DSP chip are all arranged on the circuit board, and the connecting ends of the Mini-MT ferrules are respectively connected to the two MT ferrules through optical fibers.

9. The optical module according to claim 8, wherein: Two coupling lens assemblies are arranged on the circuit board, and the two coupling lens assemblies are arranged in sequence along the direction from the optical port to the electrical port.

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