High-speed optical module receiving end assembly
By using a lens to replace the collimator in the receiving end assembly of the high-speed optical module, and combining a smaller wavelength division multiplexer and array lens, the problem of excessive beam spacing is solved, and a miniaturized and low-cost optical module design is achieved.
Patent Information
- Application Number
- CN202422330945.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-24
AI Technical Summary
In the existing high-speed optical module receiving end components, the structure of the collimator and wavelength division multiplexer cannot meet the small spot requirement of 0.25 Pitch, resulting in too large beam spacing.
The collimator is replaced by a lens and a smaller, finer wavelength division multiplexer of 0.25 Pitch is used to combine the array lens and prism to achieve beam convergence and splitting to form a beam of 0.25mm interval.
The receiving end component of the optical module is realized with a light beam interval of 0.25mm, which is simple in structure and low in cost, and is suitable for the miniaturization design of the receiving end.
Smart Images
Figure CN223155275U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optical devices, in particular to a receiving end component of a high-speed optical module. Background Art
[0002] As Figure 1 、 Figure 2 shown, a common non-hermetic packaged receiving end component includes an optical fiber 20, a collimator 90, a glass block 100, a wavelength division multiplexer 50, an array lens 60, a prism 70, and a substrate 80. Components such as a laser are mounted on one end of the receiving end component, so that light of a specified wavelength is incident on the collimator 90 through the optical fiber 20; the collimated light beam after passing through the collimator 90 is then split into four beams of light by the wavelength division action of the wavelength division multiplexer 50, and enters the array lens 60 from the output end of the wavelength division multiplexer 50, and four optical paths with a spacing of 0.75 mm are formed at the focal point through the turning of the prism 70.
[0003] In the existing structure, the curvature of the collimator 90 cannot meet the requirements of a 0.25 Pitch small spot, and the structure of the wavelength division multiplexer 50 also cannot meet the design requirements of 0.25 Pitch. Summary of the Utility Model
[0004] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a receiving end component of a high-speed optical module. In this application, a lens is used to replace the common collimator to meet the requirements of a small spot.
[0005] The purpose of the utility model is achieved by adopting the following technical solutions:
[0006] A receiving end component of a high-speed optical module includes an optical fiber, a wavelength division multiplexer, an array lens, a prism, and a substrate. The optical fiber is used to transmit light. The array lens is located between the wavelength division multiplexer and the prism. The receiving end component of the high-speed optical module further includes a Receptacle optical interface, a capillary tube, and a lens. The capillary tube, the lens, the wavelength division multiplexer, the array lens, and the prism are fixed on the substrate. The Receptacle optical interface is connected to the optical fiber. The lens is located between the capillary tube and the wavelength division multiplexer. The capillary tube converges the light and incident it on the lens. The lens incident the collimated light converged by the capillary tube on the wavelength division multiplexer. The wavelength division multiplexer demultiplexes the wavelength to form 4 parallel light beams incident on the array lens. The array lens converges the incident light. After the converged light beam exits from the prism, it converges to the focal point position.
[0007] Further, a high-reflection film is plated on the prism.
[0008] Further, the array lens has a spherical structure with protrusions.
[0009] Further, the capillary, lens, wavelength division multiplexer, array lens, and prism are fixed on the substrate by ultraviolet curable glue.
[0010] Compared with the prior art, the receiving end assembly of the high-speed optical module of the present utility model includes a Receptacle optical interface, an optical fiber, a capillary, a lens, a wavelength division multiplexer, an array lens, a prism, and a substrate. The optical fiber is used to transmit light. The capillary, lens, wavelength division multiplexer, array lens, and prism are fixed on the substrate. The Receptacle optical interface is connected to the optical fiber. The lens is located between the capillary and the wavelength division multiplexer. The array lens is located between the wavelength division multiplexer and the prism. The capillary converges the light and incident it on the lens. The lens incident the collimated light converged by the capillary on the wavelength division multiplexer. The wavelength division multiplexer demultiplexes the wavelengths, forming 4 parallel lights incident on the array lens. The array lens converges the incident light. After the converged light beam exits from the prism, it converges to the focal position. This application meets the requirement of a small light spot by using a lens to replace the common collimator; this application uses a smaller and more refined wavelength division multiplexer with a 0.25 Pitch; in the receiving end of the optical module of this application, four light beams with a spacing of 0.25 mm can be achieved. Description of the Drawings
[0011] Figure 1 Schematic structural diagram of the receiving end assembly of the high-speed optical module in the background art;
[0012] Figure 2 Front view of the receiving end assembly of the high-speed optical module in the background art;
[0013] Figure 3 Schematic structural diagram of the receiving end assembly of the high-speed optical module of the present utility model;
[0014] Figure 4 For Figure 3 Front view of the receiving end assembly of the high-speed optical module;
[0015] Figure 5 For Figure 3 Top view of the receiving end assembly of the high-speed optical module.
[0016] In the figure: 10, Receptacle optical interface; 20, optical fiber; 30, capillary; 40, lens; 50, wavelength division multiplexer; 60, array lens; 70, prism; 80, substrate; 90, collimator; 100, glass block. Detailed Description of the Invention
[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
[0018] It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be another intermediate component through which it is fixed. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may also be another intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may also be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.
[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used herein in the description of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0020] In this embodiment:
[0021] As Figure 3 shown, the receiving end component of this high-speed optical module includes a Receptacle optical interface 10, an optical fiber 20, a capillary 30, a lens 40, a wavelength division multiplexer 50, an array lens 60, a prism 70, and a substrate 80.
[0022] The Receptacle optical interface 10 is used to directly dock with an LC connector and connect to a laser.
[0023] The optical fiber 20 is used to transmit light and is connected to the Receptacle optical interface 10. In this embodiment, the Receptacle optical interface 10 and the optical fiber 20 are fixedly connected by glue.
[0024] The capillary 30 is used to converge the light transmitted by the optical fiber 20 and incident it on the lens 40. In this embodiment, the capillary 30 is square.
[0025] The lens 40 is located between the capillary 30 and the wavelength division multiplexer 50, and the lens 40 incident the collimated light converged by the capillary 30 on the wavelength division multiplexer 50.
[0026] The wavelength division multiplexer 50 is used to demultiplex wavelengths to form multiple parallel light beams. In this embodiment, the wavelength division multiplexer 50 divides one light beam into four light beams. In this embodiment, a smaller and more refined wavelength division multiplexer 50 with a 0.25 Pitch is used.
[0027] The array lens 60 is located between the wavelength division multiplexer 50 and the prism 70. The array lens 60 focuses the four light beams and then reflects them to the focal position by the prism 70 respectively. In this embodiment, the array lens 60 is made of glass or silicon. Specifically, the array lens 60 is processed by grinding and polishing, or can also be processed by die forming, or can be processed by etching. The array lens 60 has a spherical structure with protrusions and can focus the incident light.
[0028] The prism 70 is usually coated with a high-reflection film or utilizes the total reflection principle and can deflect the light beam by about 90 degrees. After the focused light beam exits from the prism 70, it converges to the focal position.
[0029] Generally, a user will place a PD (photodiode) at the focal position. Thus, the four demultiplexed light beams are respectively received by four PDs, and the optical signals are converted into electrical signals.
[0030] The substrate 80 is used to carry functional components such as the capillary 30, the lens 40, the wavelength division multiplexer 50, the array lens 60, and the prism 70. In this embodiment, the material of the substrate 80 is glass. The substrate 80 is a rectangular plate. Functional components such as the capillary 30, the lens 40, the wavelength division multiplexer 50, the array lens 60, and the prism 70 are directly fixedly installed on the substrate 80 through ultraviolet-cured epoxy resin glue.
[0031] In this application, after the light is emitted from the laser through the Receptacle optical interface 10, it passes through the optical fiber 20, the capillary 30, the lens 40, the wavelength division multiplexer 50, the array lens 60, and the prism 70 and is divided into four light beams with a spacing of 0.25 mm, and converges to the focal position. This application meets the requirement of a small light spot by using the lens 40 to replace the common collimator 90; this application uses a smaller and more refined wavelength division multiplexer with a 0.25 Pitch; at the receiving end of the optical module in this application, four light beams with a spacing of 0.25 mm can be realized. The structure of this application is simple, occupies a small space, and has a low cost, which is beneficial to the miniaturization of the receiving end components.
[0032] The above embodiments only illustrate several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several variations and improvements can be made. These are all equivalent modifications and evolutions made to the above embodiments based on the substantial technology of the present utility model, and all of these fall within the protection scope of the present utility model.
Claims
1. A receiving end component of a high-speed optical module, comprising an optical fiber, a wavelength division multiplexer, an array lens, a prism, and a substrate. The optical fiber is used for transmitting light, and the array lens is located between the wavelength division multiplexer and the prism. It is characterized in that: The receiving end component of the high-speed optical module further includes a Receptacle optical interface, a capillary, and a lens. The capillary, the lens, the wavelength division multiplexer, the array lens, and the prism are fixed on the substrate. The Receptacle optical interface is connected to the optical fiber. The lens is located between the capillary and the wavelength division multiplexer. The capillary converges the light and incident it on the lens. The lens incident the collimated light converged by the capillary on the wavelength division multiplexer. The wavelength division multiplexer demultiplexes the wavelengths, forming 4 parallel lights incident on the array lens. The array lens converges the incident light. After the converged light beam exits from the prism, it converges to the focal point position.
2. The receiving end component of the high-speed optical module according to claim 1, wherein: A high-reflection film is plated on the prism.
3. The receiving end component of the high-speed optical module according to claim 1, characterized in that: The array lens is a spherical structure with protrusions.
4. The receiving end component of the high-speed optical module according to claim 1, characterized in that: The capillary, the lens, the wavelength division multiplexer, the array lens, and the prism are fixed on the substrate by ultraviolet-cured glue.