Optical receiving assembly and optical module

Abstract

The utility model relates to the technical field of optical communication, and provides an optical receiving assembly, which comprises a shell, a beam splitting assembly, a main transmission signal receiving unit and a monitoring signal receiving unit are arranged in the shell, the beam splitting assembly is used for splitting received light into main transmission signal light and monitoring signal light, the main transmission signal receiving unit is used for receiving the main transmission signal light and the monitoring signal light, and the monitoring signal receiving unit is used for receiving the monitoring signal light. And the monitoring signal receiving unit is used for receiving the main transmission signal light split by the beam splitting assembly and converting the main transmission signal light into an electric signal, and the monitoring signal receiving unit is used for receiving the monitoring signal light and converting the monitoring signal light into an analog electric signal. The utility model further provides an optical module which comprises the optical receiving assembly. According to the utility model, under the condition that a main transmission signal is not influenced, real-time monitoring of an optical fiber link can be realized, link faults can be found and positioned in time, the reliability and maintenance efficiency of a network are improved, the monitoring can be completed inside the optical receiving assembly, no extra OTDR equipment needs to be deployed, and the optical fiber link monitoring device is simple and convenient and can save cost.

Description

Technical Field

[0001] This utility model relates to the field of optical communication technology, specifically to an optical receiving component and an optical module. Background Technology

[0002] An OTDR (Optical Time Domain Reflectometer) is used to test the performance of fiber optic lines, primarily to detect fiber loss, breaks, splice quality, and other defects. It works by sending pulsed laser signals that propagate along the fiber. Discontinuities in the fiber (such as breaks, splices, and bends) are reflected back to the instrument. The OTDR plots the fiber's loss curve based on the intensity and time differences of the reflected signals. Using this data, engineers can determine the fiber's condition, loss status, and fault location.

[0003] With the increasing demand for high-speed, long-distance transmission in data centers and communication networks, 100GLR4 optical modules are widely used due to their high transmission rate and long transmission distance. However, existing 100GLR4 optical modules lack real-time monitoring of fiber optic link status during transmission, making it impossible to detect and locate link faults in a timely manner, affecting network reliability and maintenance efficiency. Traditional OTDR devices are independent of optical modules and require additional deployment, resulting in system complexity and high costs. Utility Model Content

[0004] The purpose of this invention is to provide an optical receiving component and an optical module, which can at least solve some of the defects in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an optical receiving component, comprising a housing, wherein the housing is provided with a beam splitter, a main transmission signal receiving unit, and a monitoring signal receiving unit.

[0006] The beam splitter is used to split the received light into main transmission signal light and monitoring signal light.

[0007] The main transmission signal receiving unit is used to receive the main transmission signal light split by the beam splitter and convert it into an electrical signal.

[0008] The monitoring signal receiving unit is used to receive the monitoring signal light and convert it into an analog electrical signal.

[0009] Furthermore, the beam splitting assembly includes a wavelength division multiplexer and an optical splitter. The wavelength division multiplexer is used to demultiplex the received light into multiple paths, and the optical splitter is used to split each beam into a main transmission signal light and a monitoring signal light.

[0010] Furthermore, the wavelength division multiplexer has a bandwidth of 0.5 dB > 1.4 nm and an AOI of 13.5°.

[0011] Furthermore, both the incident surface S1 and the exit surface S3 of the optical splitter are coated with AR film, the first inner surface S2 for receiving light emitted from the incident surface S1 is coated with NPBS film, and the second inner surface S4 for receiving light reflected from the first inner surface S2 is not coated.

[0012] Furthermore, it also includes a lens assembly for coupling the main transmission signal light and the monitoring signal light to the main transmission signal receiving unit and the monitoring signal receiving unit, respectively.

[0013] Furthermore, the lens assembly includes a first lens array for focusing the main transmission signal light and a second lens for focusing the monitoring signal light.

[0014] Furthermore, the main transmission signal receiving unit includes a first photodetector array and a transimpedance amplifier. The first photodetector array receives the main transmission signal light, and the transimpedance amplifier converts the optical signal received by the first photodetector array into an electrical signal.

[0015] Furthermore, the monitoring signal receiving unit includes a second photodetector, which receives the monitoring signal light and converts it into an analog electrical signal.

[0016] Furthermore, it also includes a deflection prism for deflecting the monitoring signal light to the monitoring signal receiving unit.

[0017] This utility model provides another technical solution: an optical module, including the above-mentioned optical receiving component.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: by cleverly splitting the received light into a main transmission signal light and a monitoring signal light, and configuring a main transmission signal receiving unit and a monitoring signal receiving unit in the optical receiving component to receive the main transmission signal light and the monitoring signal light respectively, and then converting them into corresponding signals, real-time monitoring of the optical fiber link can be achieved without affecting the main transmission signal, so as to detect and locate link faults in a timely manner, improve the reliability and maintenance efficiency of the network, and the monitoring can be completed inside the optical receiving component without the need to deploy additional OTDR equipment, which is both simple and cost-effective. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an optical receiving component provided in an embodiment of the present invention;

[0020] Figure 2 An enlarged schematic diagram of the main transmission signal receiving unit and the monitoring signal receiving unit of an optical receiving component provided in an embodiment of this utility model;

[0021] Figure 3A schematic diagram of the structure of an optical splitter for an optical receiving component provided in an embodiment of this utility model;

[0022] In the attached figures, the following labels are used: 1-Fiber optic adapter; 2-Wavelength division multiplexer; 3-Optical splitter; 4-First lens array; 5-Second lens; 6-Conversion prism; 7-Housing; 8-FPC; 9-Main transmission signal receiving unit; 10-First photodetector array; 11-Transimpedance amplifier; 12-Monitoring signal receiving unit; 13-Second photodetector; 14-FPC housing assembly. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] Please see Figure 1 and Figure 2 This utility model provides an optical receiving component, including a housing 7. The housing 7 houses a beam splitter, a main transmission signal receiving unit 9, and a monitoring signal receiving unit 12. The beam splitter splits the received light into a main transmission signal and a monitoring signal. The main transmission signal receiving unit 9 receives the main transmission signal split by the beam splitter and converts it into an electrical signal. The monitoring signal receiving unit 12 receives the monitoring signal and converts it into an analog electrical signal. In this embodiment, by cleverly splitting the received light into a main transmission signal and a monitoring signal, and configuring the main transmission signal receiving unit 9 and the monitoring signal receiving unit 12 within the optical receiving component to receive the main transmission signal and the monitoring signal respectively, and then converting them into corresponding signals, real-time monitoring of the fiber optic link can be achieved without affecting the main transmission signal. This allows for timely detection and location of link faults, improving network reliability and maintenance efficiency. Furthermore, the monitoring can be completed within the optical receiving component, eliminating the need for additional OTDR equipment, which is both simple and cost-effective.

[0025] Please see Figure 1 and Figure 2The beam splitting assembly includes a wavelength division multiplexer 2 and an optical splitter 3. The wavelength division multiplexer 2 is used to demultiplex the received light into multiple paths, and the optical splitter 3 is used to split each beam into a main transmission signal beam and a monitoring signal beam. In this embodiment, beam splitting is achieved by the cooperation of the wavelength division multiplexer 2 and the optical splitter 3. The wavelength division multiplexer 2 can demultiplex the received light into multiple paths, for example, into four paths. Then, the optical splitter 3 splits each beam into a main transmission signal beam and a monitoring signal beam. Specifically, one beam can be split into two paths, one of which, together with the remaining three, forms four main transmission signal beams, and the other is the monitoring signal beam. Preferably, as... Figure 3 As shown, the wavelength division multiplexer 2 has a 0.5dB bandwidth > 1.4nm and an AOI of 13.5°. The incident surface S1 and the exit surface S3 of the optical splitter 3 are both coated with an AR (anti-reflection) film. The first internal surface S2, used to receive light from the incident surface S1, is coated with an NPBS (neutral beam splitter) film. The second internal surface S4, used to receive light reflected from the first internal surface S2, is uncoated. Preferably, the main transmission signal receiving unit 9 and the monitoring signal receiving unit 12 are arranged side-by-side within the housing 7, which facilitates the design of the optical path and reduces the size of the housing 7.

[0026] Please see Figure 1 and Figure 2 The optical receiving component further includes a lens assembly for coupling the main transmission signal light and the monitoring signal light to the main transmission signal receiving unit 9 and the monitoring signal receiving unit 12, respectively. In this embodiment, the lens assembly functions as a focusing coupling, converging the light into the detection areas of the two receiving units (i.e., the main transmission signal receiving unit 9 and the monitoring signal receiving unit 12) to achieve final coupling of the optical paths. Specifically, the lens assembly includes a first lens array 4 for focusing the main transmission signal light and a second lens 5 for focusing the monitoring signal light. Because the main transmission signal light has multiple paths, a lens array is used to facilitate focusing coupling. The lens array can have four lenses corresponding one-to-one with the four light paths.

[0027] Please see Figure 1 and Figure 2 The main transmission signal receiving unit 9 includes a first photodetector array 10 and a transimpedance amplifier 11. The first photodetector array 10 receives the main transmission signal light, and the transimpedance amplifier 11 converts the light signal received by the first photodetector array 10 into an electrical signal. In this embodiment, the main transmission signal receiving unit 9 uses a photodetector array and a transimpedance amplifier 11 to receive the light focused by the lens and convert the light beam into an electrical signal. The first photodetector array 10 has four photodetectors, which can correspond one-to-one with four light sources, thereby realizing the transmission of the main signal.

[0028] Please see Figure 1 and Figure 2 The monitoring signal receiving unit 12 includes a second photodetector 13, which receives the monitoring signal light and converts it into an analog electrical signal. In this embodiment, the monitoring signal receiving unit 12 uses the second photodetector 13 to receive the monitoring signal light and convert the optical signal into an analog signal, thereby realizing the photoelectric conversion of the monitoring unit.

[0029] Please see Figure 1 and Figure 2 The optical receiving assembly also includes a deflection prism 6 for redirecting the monitoring signal light to the monitoring signal receiving unit 12. In this embodiment, the deflection prism 6 is used to change the optical path, such as with a deflection angle of 42.5°. The deflection prism 6 is placed directly above the photodetector in the receiving assembly, and through total internal reflection, it deflects the horizontally propagating light beam downwards, thereby achieving optical path redirection from the optical fiber to the second photodetector 13 of the monitoring signal receiving unit 12.

[0030] Please see Figure 1 and Figure 2 This optical receiver assembly also includes an FPC housing assembly 14, which consists of two parts: an FPC 8 and a housing 7. The FPC 8 and the housing 7 are fixed together with adhesive. The housing 7 is used to mount various components and protect them. The FPC 8 is used to transmit electrical signals to the module's information processing unit. The housing 7 in the FPC housing assembly 14 serves as the structural outer shell of the entire optical receiver assembly. The fiber optic adapter 1 is connected to the housing by laser welding. All other optoelectronic components are mounted inside the housing, and the remaining components are sealed with adhesive to achieve a semi-hermetic compact package. This package structure is compact, small in size, highly reliable, and perfectly adapted to the structure of a 100G QSFP28 optical module.

[0031] Please see Figure 1 and Figure 2 The housing 7 is equipped with an optical fiber adapter 1 for receiving optical signals from the optical fiber and performing optical path shaping. The optical signal is the received light. The optical fiber adapter 1 includes an adapter and a C-lens. After receiving the light from the optical fiber, the adapter uses the C-lens inside the adapter to shape the divergent light in the optical fiber into collimated light.

[0032] This utility model provides an optical module, including the aforementioned optical receiving component, which can realize real-time monitoring of the optical fiber link without affecting the main transmission signal, timely detection and location of link faults, improve network reliability and maintenance efficiency, and eliminate the need for additional OTDR equipment.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A light receiving component, comprising a housing, characterized in that: The housing contains a beam splitter assembly, a main transmission signal receiving unit, and a monitoring signal receiving unit. The beam splitter is used to split the received light into main transmission signal light and monitoring signal light. The main transmission signal receiving unit is used to receive the main transmission signal light split by the beam splitter and convert it into an electrical signal. The monitoring signal receiving unit is used to receive the monitoring signal light and convert it into an analog electrical signal.

2. The optical receiving assembly of claim 1, wherein: The beam splitting assembly includes a wavelength division multiplexer and an optical splitter. The wavelength division multiplexer is used to demultiplex the received light into multiple paths, and the optical splitter is used to split each beam into a main transmission signal light and a monitoring signal light.

3. The optical receiving assembly of claim 2, wherein: The wavelength division multiplexer has a bandwidth of 0.5 dB > 1.4 nm and an AOI of 13.5°.

4. The optical receiving assembly of claim 2, wherein: The incident surface S1 and the exit surface S3 of the optical splitter are both coated with AR film. The first inner surface S2, which is used to receive light emitted from the incident surface S1, is coated with NPBS film. The second inner surface S4, which is used to receive light reflected from the first inner surface S2, is not coated.

5. The optical receiving assembly of claim 1, wherein: It also includes a lens assembly for coupling the main transmission signal light and the monitoring signal light to the main transmission signal receiving unit and the monitoring signal receiving unit, respectively.

6. The optical receiving assembly of claim 5, wherein: The lens assembly includes a first lens array for focusing the main transmission signal light and a second lens for focusing the monitoring signal light.

7. The optical receiving assembly of claim 1, wherein: The main transmission signal receiving unit includes a first photodetector array and a transimpedance amplifier. The first photodetector array receives the main transmission signal light, and the transimpedance amplifier converts the optical signal received by the first photodetector array into an electrical signal.

8. The optical receiving assembly of claim 1, wherein: The monitoring signal receiving unit includes a second photodetector, which receives the monitoring signal light and converts it into an analog electrical signal.

9. The optical receiving assembly of claim 1, wherein: It also includes a deflection prism for deflecting the monitoring signal light to the monitoring signal receiving unit.

10. An optical module characterized by comprising: Includes the optical receiving component as described in any one of claims 1-9.

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