CN217036321U

CN217036321U - Optical assembly with optical monitoring function

Info

Publication number: CN217036321U
Application number: CN202221059735.8U
Authority: CN
Inventors: 孙伟; 常俊锋; 李晋
Original assignee: Anyang Lufeng Information Technology Co ltd
Current assignee: Anyang Lufeng Information Technology Co ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2022-07-22
Anticipated expiration: 2032-05-06

Abstract

An optical assembly with optical monitoring comprises a lens main body, wherein a VCSEL collimating lens is arranged on the lens main body, light emitted by a VCSEL laser is converted into collimated light through the VCSEL collimating lens, two optical surfaces, namely an MPD light splitting reflection surface A and a multimode optical fiber focusing reflection surface, are arranged above the VCSEL collimating lens, the collimated light emitted from the VCSEL collimating lens covers the two optical surfaces, an MPD light splitting reflection surface B is arranged on the MPD light splitting reflection surface A towards the right, the light reflected by the MPD light splitting reflection surface A travels to the MPD light splitting reflection surface B, the light reflected by the MPD light splitting reflection surface B travels to an MPD chip arranged outside the lens main body, the multimode optical fiber focusing reflection surface is an off-axis aspheric surface, and the light reflected by the multimode optical fiber focusing reflection surface travels to a multimode optical fiber arranged outside the lens main body. The assembly does not need to adopt a light splitting piece.

Description

Optical assembly with optical monitoring function

Technical Field

The utility model relates to an optical assembly used in communication, in particular to an optical assembly with optical monitoring, belonging to the technical field of communication devices.

Background

Along with the improvement of the reliability requirement of an optical communication device, the optical transmission component in communication is required to be monitored with light, and the transmission fault of a light path, the problem of the optical component and the relevant change on the light path can be effectively found through optical monitoring, wherein US20030081645A1 discloses a scheme adopting a beam splitter, a VCSEL collimation lens surface is adopted to convert the output divergent light of the VCSEL into collimated light, after passing through a 45-degree total reflection surface, a part of light is reflected to an MPD (monitoring photodiode) focusing lens surface through the beam splitter and then is converged to a photosensitive surface of an MPD chip, and other light passing through the beam splitter normally reaches a multimode optical fiber after passing through a multimode optical fiber focusing lens; the technical scheme adopts the light splitting piece which needs to be adhered, has higher requirement on glue, has the possibility of cracking when the temperature is raised due to the inconsistent expansion coefficients of the light splitting piece and the lens main body, and has the problem of reliability; chinese patent No. 2014107595323 discloses an optical assembly with backlight monitoring for high-speed transmission, in which a glass beam splitter is used to realize beam splitting and a certain beam deviation is realized by the thickness of the beam splitter, except the above problems of the beam splitter, the above scheme describes that the coating film in the lower area of the beam splitter is an energy beam splitter and the upper area is an antireflection film, but because the separation distance of the upper and lower light paths is very small, usually within 1mm, two different optical film systems are respectively coated in the narrow area, and the difficulty in coating process is too high.

Disclosure of Invention

The present invention is directed to overcoming the above-mentioned problems of the conventional optical transmission module with optical monitoring, and to providing an optical module with optical monitoring.

In order to realize the purpose of the utility model, the following technical scheme is adopted: an optical assembly with optical monitoring comprises a lens main body, wherein a VCSEL collimating lens is arranged on the lens main body, light emitted by a VCSEL laser is converted into collimated light through the VCSEL collimating lens, two optical surfaces, namely an MPD light splitting reflection surface A and a multimode optical fiber focusing reflection surface, are arranged above the VCSEL collimating lens, the collimated light emitted from the VCSEL collimating lens covers the two optical surfaces, an MPD light splitting reflection surface B is arranged towards the right direction on the MPD light splitting reflection surface A, light reflected by the MPD light splitting reflection surface A travels to the MPD light splitting reflection surface B, light reflected by the MPD light splitting reflection surface B travels to an MPD chip arranged outside the lens main body, A, MPD light splitting reflection surfaces B are all planes, the multimode optical fiber focusing reflection surface is an off-axis aspheric surface, and light reflected by the multimode optical fiber focusing emission surface travels to a multimode optical fiber arranged outside the lens main body.

Further, the method comprises the following steps of; the MPD light splitting reflecting surface A, MPD light splitting reflecting surfaces B are all 45-degree total reflecting surfaces.

Further, the method comprises the following steps of; the MPD chip is located on the same side of the lens body as the VCSEL laser.

Further, the method comprises the following steps of; the multimode fiber focusing reflecting surface is an off-axis paraboloid.

The utility model has the positive and beneficial technical effects that: the light path of the component is relatively simple, and a light splitting piece is not needed. The method reduces the process of pasting the beam splitter, overcomes various problems caused by the adoption of the beam splitter, has low difficulty in optical processing, can be realized by only 4 optical surfaces, and simplifies the processing process of the positions of the optical surfaces.

Drawings

FIG. 1 is a schematic of the present invention.

Detailed Description

In order to more fully explain the implementation of the present invention, examples of the implementation of the present invention are provided. These examples are merely illustrative of the present invention and do not limit the scope of the utility model.

The utility model is explained in further detail in connection with the accompanying drawings, in which: 1: a lens body; 2: a VCSEL laser; 3: a VCSEL collimating lens; 4: MPD light splitting reflecting surface A; 5, MPD light splitting reflection surface B; 6: a multimode fiber focusing reflective surface; 7: a multimode optical fiber; 8: and an MPD chip.

The upper, lower, left, and right directions in the present application are defined by the relative orientations shown in fig. 1, and the orientation definitions are for better explanation and do not represent absolute orientations in actual use.

As shown in the drawings, an optical assembly with optical monitoring comprises a lens body 1, a VCSEL collimating lens 3 is arranged on the lens body, light emitted by a VCSEL laser 2 is converted into collimated light through the VCSEL collimating lens, two optical surfaces, namely an MPD beam splitting reflection surface a4 and a multimode fiber focusing reflection surface 6, are arranged above the VCSEL collimating lens, the collimated light emitted from the VCSEL collimating lens covers the two optical surfaces, an MPD beam splitting reflection surface B5 is arranged on the MPD beam splitting reflection surface a towards the right, light reflected by the MPD beam splitting reflection surface a travels to the MPD beam splitting reflection surface B, and light reflected by the MPD beam splitting reflection surface B travels to an MPD chip 8 arranged outside the lens body. The MPD light splitting reflection surface A, MPD and the MPD light splitting reflection surface A, MPD are all planes, and more specifically, all the MPD light splitting reflection surfaces B are all 45 ° total reflection surfaces. The multimode fiber focusing reflecting surface is an off-axis aspheric surface, and in more detail, the multimode fiber focusing reflecting surface is an off-axis paraboloid. The multimode optical fiber focusing emission surface focuses the reflected light to travel to a multimode optical fiber disposed outside the lens body.

The optical path in the present component is illustrated by taking fig. 1 as an example, and the dotted line in fig. 1 is a schematic diagram of the optical path of the present optical component.

1. Discrete light emitted by the VCSEL laser passes through the VCSELVCSEL collimating lens and then is shifted to collimate the light;

2. collimated light is emitted to an MPD light splitting reflecting surface A and a multimode optical fiber focusing reflecting surface; separation of monitoring light is realized through an MPD light splitting reflection surface A;

3. the MPD light splitting reflection surface A reflects collimated light in the area to the right to an MPD light splitting reflection surface B, and then the collimated light is reflected to the photosensitive surface of the MPD chip by the MPD light splitting reflection surface B;

4. the focusing reflecting surface of the multimode fiber is an off-axis paraboloid, and the incident collimated light beams in the area are focused and coupled into the multimode fiber rightwards.

After the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the utility model, and it is intended that all simple modifications, equivalent changes and modifications made to the above embodiments based on the technical spirit of the present invention shall fall within the technical scope of the present invention, and the present invention shall not be limited to the embodiments illustrated in the description.

Claims

1. An optical subassembly with optical monitoring, includes the lens main part, has VCSEL collimating lens on the lens main part, and the light that VCSEL laser sent becomes collimated light through VCSEL collimating lens, its characterized in that: the lens is characterized in that two optical surfaces, namely an MPD light splitting reflection surface A and a multimode optical fiber focusing reflection surface, are arranged above the VCSEL collimating lens, collimated light emitted from the VCSEL collimating lens covers the two optical surfaces, an MPD light splitting reflection surface B is arranged on the MPD light splitting reflection surface A towards the right, light reflected by the MPD light splitting reflection surface A travels to the MPD light splitting reflection surface B, light reflected by the MPD light splitting reflection surface B travels to an MPD chip arranged outside the lens main body, the MPD light splitting reflection surfaces A, MPD are plane light splitting reflection surfaces B, the multimode optical fiber focusing reflection surface is an off-axis aspheric surface, and light reflected by the multimode optical fiber focusing emission surface travels to a multimode optical fiber arranged outside the lens main body.

2. An optical assembly with optical monitoring as claimed in claim 1, wherein: the MPD light splitting reflecting surface A, MPD light splitting reflecting surfaces B are all 45-degree total reflecting surfaces.

3. An optical module with optical monitoring as claimed in claim 1, wherein: the MPD chip is located on the same side of the lens body as the VCSEL laser.

4. An optical module with optical monitoring as claimed in claim 1, wherein: the multimode fiber focusing reflecting surface is an off-axis paraboloid.