High-speed optical module receiving end assembly

Abstract

The utility model discloses a high-speed optical module receiving end assembly, which belongs to the technical field of optical devices, and comprises a Receptacle optical interface, an optical fiber, a capillary tube, a lens, a wavelength division multiplexer, an array lens and a roof prism, the prism is fixed on a substrate, the Receptacle optical interface is connected with the optical fiber, the lens is positioned between the capillary tube and the wavelength division multiplexer, and the array lens is fixed on the substrate. The roof prism is located between the array lens and the prism, the capillary tube gathers light rays and enables the light rays to enter the lens, the lens enables collimated light gathered by the capillary tube to enter the wavelength division multiplexer, the wavelength division multiplexer carries out wavelength demultiplexing, four paths of parallel light are formed and enter the array lens, the array lens gathers the incident light, and the light rays enter the prism. And the converged light beams are emitted into the roof prism, then are emitted from the prism and are converged to a focus position. According to the invention, four light beams of 0.75 Pitch are converted into light beams of 0.25 Pitch by using a roof prism; according to the invention, at the receiving end of the optical module, four light beams with the interval of 0.25 mm can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of optical devices, in particular to a receiving end assembly of a high-speed optical module. Background Art

[0002] As Figure 1 、 Figure 2 shown, a common non-hermetic packaging receiving end assembly 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 assembly, so that light of a specified wavelength enters 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 focus through the turning of the prism 70.

[0003] In the existing structure, the curvature of the collimator 90 cannot meet the requirements of a small spot with a 0.25 Pitch, and the structure of the wavelength division multiplexer 50 also cannot meet the design requirements of 0.25 Pitch. Content 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 assembly 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; a roof prism is used in this application to convert four beams of light with a 0.75 Pitch into a 0.25 Pitch; at the receiving end of the optical module, four beams of light with a spacing of 0.25 mm can be realized.

[0005] The purpose of the utility model is achieved by adopting the following technical solutions:

[0006] A high-speed optical module receiving end component 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 high-speed optical module receiving end component further includes a Receptacle optical interface, a capillary, and a lens. The capillary, the lens, and a roof prism. The capillary, the lens, the wavelength division multiplexer, the array lens, the roof prism, 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 roof prism is located between the array lens and the prism. The capillary converges the light and incident it on the lens. The lens makes the collimated light converged by the capillary incident on the wavelength division multiplexer. The wavelength division multiplexer demultiplexes the wavelengths to form 4 parallel lights incident on the array lens. The array lens converges the incident light. After the converged light beam enters the roof prism and exits from the prism, it converges to the focal position.

[0007] Further, a high-reflection film is coated on the prism.

[0008] Further, the array lens has a spherical structure with protrusions.

[0009] Further, the capillary, the lens, the wavelength division multiplexer, the array lens, the roof prism, and the prism are fixed on the substrate by ultraviolet light-cured glue.

[0010] Further, the lens is a silicon lens.

[0011] Further, the array lens is made of glass or silicon.

[0012] 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 roof prism, a prism, and a substrate. The optical fiber is used to transmit light. The capillary, the lens, the wavelength division multiplexer, the array lens, the roof prism, 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 roof prism is located between the array lens 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 light beams incident on the array lens. The array lens converges the incident light. After the converged light beam enters the roof prism and exits from the prism, it converges to the focal position. In this application, a lens is used to replace the common collimator to meet the requirement of a small light spot. In this application, a roof prism is used to convert four light beams with a 0.75Pitch into a 0.25Pitch. In the receiving end of the optical module of this application, four light beams with a spacing of 0.25 mm can be realized. Description of the Drawings

[0013] Figure 1 Schematic structural diagram of the receiving end assembly of the high-speed optical module in the background technology;

[0014] Figure 2 Front view of the receiving end assembly of the high-speed optical module in the background technology;

[0015] Figure 3 Schematic structural diagram of the receiving end assembly of the high-speed optical module of the present utility model;

[0016] Figure 4 For Figure 3 front view of the receiving end assembly of the high-speed optical module;

[0017] Figure 5 For Figure 3 top view of the receiving end assembly of the high-speed optical module.

[0018] 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; 110, roof prism. Detailed Embodiments

[0019] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] 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 can 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 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 be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0021] 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 specification 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.

[0022] In this embodiment:

[0023] Such as Figure 3 As 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, a substrate 80, and a roof prism 110.

[0024] The Receptacle optical interface 10 is used to directly dock with an LC connector and connect to a laser.

[0025] 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.

[0026] 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.

[0027] The lens 40 is located between the capillary 30 and the wavelength division multiplexer 50. The lens 40 projects the collimated light converged by the capillary 30 onto the wavelength division multiplexer 50. In this embodiment, the lens 40 is made of silicon material.

[0028] 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.

[0029] The array lens 60 further converges and collimates the four light beams, and then projects them into the roof prism 110 at an interval of 0.75 Pitch. In this embodiment, the array lens 60 is made of glass or silicon material. Specifically, the array lens 60 is processed by grinding and polishing, and can also be processed by die forming or etching. The array lens 60 has a convex spherical structure and can converge the incident light.

[0030] The roof prism 110 is located between the array lens 60 and the prism 70. The roof prism 110 reduces the interval of the four light beams to 0.25 mm, and then projects them into the prism 70 at an interval of 0.25 Pitch.

[0031] 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 converged light beam exits from the prism 70, it converges to the focal position, and the interval of the four light beams at the focal position is 0.25 mm.

[0032] Generally, users will place a PD (photodiode) at the focal position, so that the four demultiplexed light beams are respectively received by four PDs, and the optical signals are converted into electrical signals.

[0033] 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, the roof prism 110, 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, the roof prism 110, and the prism 70 are directly fixedly installed on the substrate 80 through ultraviolet-cured epoxy resin glue.

[0034] 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, the roof prism 110, and the prism 70 and is divided into four beams with a spacing of 0.25 mm, and converges to the focal position. This application meets the requirement of a small spot by using the lens 40 to replace the common collimator 90; this application uses the roof prism 110 to convert the four beams with a 0.75 Pitch into a 0.25 Pitch; at the receiving end of the optical module in this application, four beams with a spacing of 0.25 mm can be achieved.

[0035] The above embodiments only express several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on 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 deformations 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 belong to 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 rays, 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, a lens, and a roof prism. The capillary, lens, wavelength division multiplexer, array lens, roof prism, 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 roof prism is located between the array lens and the prism. The capillary converges the light and incident it on the lens. The lens makes the collimated light converged by the capillary incident 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 enters the roof prism and 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, characterized in that: A high-reflection film is coated on the prism.

3. The receiving end component of the high-speed optical module according to claim 1, wherein: The array lens has 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, lens, wavelength division multiplexer, array lens, roof prism, and prism are fixed on the substrate with ultraviolet-cured glue.

5. The receiving end component of the high-speed optical module according to claim 1, wherein: The lens is a silicon lens.

6. The receiving end component of the high-speed optical module according to claim 1, wherein: The array lens is made of glass or silicon.

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