A multimode wavelength division multiplexing lens

Abstract

The utility model provides a kind of multimode wavelength division multiplexing lens, including lens body, the lens body has light entrance surface and light exit surface, the lens body inside is provided with wave combining module, the wave combining module is located on the light path between the light entrance surface and light exit surface, the light entrance surface is equipped with several collimating lenses for making multiple different wavelength optical signal collimation enter the lens body inside, the light exit surface is equipped with several convergence lenses for the wave combining after wave combining optical signal is gathered and emits the lens body. The multimode wavelength division multiplexing lens is combined by wave in the lens body inside built-in wave combining module to multiple wavelength optical signal, to realize the wavelength division multiplexing of multimode, increase data communication capacity while being able to save the number of fiber channel;Moreover, the lens body is integrated with multiple optical element functions, greatly simplifies the layout space, and omits optical element assembly process, is conducive to the miniaturization and integration development of optical communication equipment.

Description

Technical Field

[0001] This utility model belongs to the field of optical device technology, specifically relating to a multimode wavelength division multiplexing lens. Background Technology

[0002] In today's rapidly developing information age, optical communication technology has become a primary means of information transmission due to its advantages such as large capacity, high speed, and low loss. However, with the explosive growth of data traffic, higher demands are being placed on the bandwidth and transmission capacity of optical communication systems. Traditional multimode optical communication systems typically employ spatial multiplexing or time-division multiplexing when transmitting multiple optical signals, but these methods suffer from problems such as complex equipment, high cost, and limited bandwidth utilization.

[0003] Wavelength division multiplexing (WDM) technology, as an effective means of capacity expansion, can significantly increase the transmission capacity of optical fibers by simultaneously transmitting multiple optical signals of different wavelengths in the same optical fiber. However, existing multimode WDM optical components are mostly discrete structures with low integration, which is not conducive to the miniaturization and integration of optical communication equipment. Utility Model Content

[0004] The purpose of this invention is to provide a multimode wavelength division multiplexing lens, which can at least solve some of the defects existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multimode wavelength division multiplexing (WDM) lens includes a lens body with an incident surface and an exit surface. A wavelength combining module is disposed inside the lens body and is located in the optical path between the incident surface and the exit surface. The incident surface is provided with a plurality of collimating lenses for collimating multiple optical signals of different wavelengths into the lens body. The exit surface is provided with a plurality of converging lenses for converging the combined optical signals and exiting the lens body.

[0007] Furthermore, the lens body has a first groove for mounting the wave combiner module, and the first groove has a limiting part for limiting the mounting position of the wave combiner module.

[0008] Furthermore, a cover plate is provided on the lens body corresponding to the opening side of the first groove.

[0009] Furthermore, the wave combiner module includes a wave combiner module, which is tilted at a certain angle relative to the converging lens. The wave combiner module has several filters of different wavelengths arranged from top to bottom on the side corresponding to the light incident surface. A reflector is arranged on the opposite side of the filters on the wave combiner module.

[0010] Furthermore, the filter and reflector are elongated structures capable of receiving multiple parallel optical paths.

[0011] Furthermore, when the light-incident surface and the light-exit surface are respectively located on two mutually perpendicular sides of the lens body, the lens body is also provided with an optical reflecting surface for total internal reflection of the optical path between the light-incident surface and the beam combiner module.

[0012] Furthermore, the lens body is provided with a second groove that is recessed inward therein, and the optical reflecting surface is located in the second groove.

[0013] Furthermore, the optical reflecting surface is arranged at an angle greater than Brewster's angle for total internal reflection of the material.

[0014] Furthermore, the lens body is integrally injection molded.

[0015] Furthermore, the light-incident surface is provided with an input fiber optic interface corresponding to the collimating lens, and the light-outcident surface is provided with an output fiber optic interface corresponding to the converging lens.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] The multimode wavelength division multiplexing lens provided by this utility model combines optical signals of multiple wavelengths by embedding a multiplexing module inside the lens body, thereby realizing multimode wavelength division multiplexing, increasing data communication capacity and saving the number of optical fiber channels; moreover, the lens body integrates the functions of various optical elements, which greatly simplifies the layout space and eliminates the optical element assembly process, which is conducive to the miniaturization and integration of optical communication equipment.

[0018] The present invention will be further described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the multimode wavelength division multiplexing lens according to an embodiment of this utility model;

[0020] Figure 2 This is a front view of the internal structure of the lens body of the multimode wavelength division multiplexing lens according to an embodiment of this utility model;

[0021] Figure 3 This is a top view of the internal structure of the lens body of the multimode wavelength division multiplexing lens according to an embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the wave combiner module in the multimode wavelength division multiplexing lens of this utility model embodiment.

[0023] Explanation of reference numerals in the attached drawings: 1. Lens body; 2. Incident surface; 3. Collimating lens; 4. Exit surface; 5. Converging lens; 6. Cover plate; 7. First groove; 8. Wave combiner module; 9. Optical reflecting surface; 10. Second groove; 11. Protrusion; 12. Wave combiner module; 13. Filter; 14. Reflector. Detailed Implementation

[0024] 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.

[0025] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, abutting connections, or integral connections. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this utility model, unless otherwise stated, "a plurality of" or "several" means two or more.

[0028] like Figure 1 , Figure 2 and Figure 3As shown, this embodiment provides a multimode wavelength division multiplexing (WDM) lens, including a lens body 1. The lens body 1 has an incident light surface 2 and an exit light surface 4. A multiplexing module 8 is disposed inside the lens body 1, located in the optical path between the incident light surface 2 and the exit light surface 4. The incident light surface 2 is provided with several collimating lenses 3 for collimating multiple optical signals of different wavelengths into the lens body 1. The exit light surface 4 is provided with several converging lenses 5 for converging the multiplexed optical signals and emitting them out of the lens body 1. In this embodiment, by embedding the multiplexing module 8 inside the lens body 1 to multiplex optical signals of multiple wavelengths, multimode wavelength division multiplexing can be achieved, increasing data communication capacity while saving the number of optical fiber channels. Moreover, the lens body integrates the functions of multiple optical elements, greatly simplifying the layout space and eliminating the optical element assembly process, which is beneficial to the miniaturization and integration of optical communication equipment.

[0029] In some embodiments, the lens body 1 is integrally injection molded, thereby enabling mass production, greatly reducing costs and improving production efficiency; at the same time, the lens body 1 can be made of materials with excellent optical properties (such as transmittance, dispersion characteristics, etc.), for example, but not limited to PEI resin material.

[0030] As one specific implementation method, such as Figure 4 As shown, the beam combining module 8 includes a beam combining module 12, which is tilted at a certain angle relative to the converging lens 5. The beam combining module 12 has several filters 13 of different wavelengths arranged from top to bottom on the side corresponding to the light-incident surface 2. Only light signals corresponding to the wavelength of the filter 13 can pass through the filter 13; other wavelengths are reflected. A reflector 14 is provided on the opposite side of the filters 13 on the beam combining module 12. Multiple light signals of different wavelengths enter the lens body 1 from the light-incident surface 2 and propagate within the lens body 1. They are incident on the corresponding filters 13 on the beam combining module 8. The different wavelengths of light signals propagate within the beam combining module 12 and are reflected by the reflector 14. Finally, these multiple different wavelengths of light signals are combined to form a combined light signal, which is emitted from the beam combining module 12, converged by the converging lens 5, and then emitted from the lens body 1.

[0031] To optimize the above technical solution, the filter 13 and reflector 14 are designed as elongated strip structures capable of receiving multiple parallel optical paths. This embodiment uses two different wavelength light signals, each with four beams, combined to form a four-beam combined light signal as an example. The incident surface of the lens body 1 is provided with eight collimating lenses 3, arranged in two columns of four each. The two columns correspond to the two different wavelength light signals, and the four collimating lenses 3 in each column correspond to the four beams of light arranged side by side. The beam combining module 12 is provided with two filters 13, which receive the two different wavelength light signals respectively. Each filter 13 receives four beams of the same wavelength. After being reflected by the reflector 14 on the beam combining module 12, the corresponding two beams of each of the two different wavelengths are combined to form one beam combined light signal, thus forming a four-beam combined light signal, which is emitted from the beam combining module 12. The light exiting surface 4 of the lens body 1 is provided with four converging lenses 5. The four beam combined light signals emitted from the beam combining module 12 are respectively aligned with these four converging lenses 5 and emitted from the lens body 1 after being converged.

[0032] In an optional implementation, an input fiber optic interface corresponding to the collimating lens 3 can be provided on the light-incident surface 2, and multiple optical signals of different wavelengths can enter the lens body 1 through the input fiber optic interface; an output fiber optic interface corresponding to the converging lens 5 can be provided on the light-out surface 4, and the combined optical signal can be output and coupled to the input fiber through the output fiber optic interface after being converged. For example, the above four combined optical signals can be output and coupled to four optical fibers respectively.

[0033] Regarding the installation method of the wave combiner module 8 inside the lens body 1, in some embodiments, a first groove 7 for installing the wave combiner module 8 can be provided on the lens body 1. The first groove 7 can be formed by recessing from the side of the lens body 1 (such as the upper surface of the lens body 1) inward. At the same time, since the wave combiner module 12 of the wave combiner module 8 needs to be arranged at a certain angle with the converging lens 5, in order to more conveniently realize this assembly requirement, a limiting part is designed in the first groove 7 to limit the installation position of the wave combiner module 8.

[0034] Optionally, for the design of the limiting part inside the first groove 7, a protrusion 11 for locking and supporting the filter 13 can be provided in the area enclosed by the side of the multiplexing module 12 and the bottommost filter 13 at the bottom of the first groove 7. At the same time, the size of the first groove 7 is designed so that the multiplexing module 8 is locked in the first groove 7 in all directions and will not move accordingly.

[0035] In other embodiments, the light-incident surface 2 and the light-exit surface 4 can be designed to be located on two mutually perpendicular surfaces of the lens body 1. For example, the light-incident surface 2 can be set on the bottom surface of the lens body 1 and the light-exit surface 4 can be set on the side surface of the lens body 1. In this case, the lens body 1 is also provided with an optical reflecting surface 9 for total internal reflection of the light path between the light-incident surface 2 and the wave combining module 8.

[0036] In one embodiment, the lens body 1 is provided with a second groove 10 that is recessed inward. Specifically, the second groove 10 is formed by the upper surface of the lens body 1 recessed towards the lower surface. The optical reflecting surface 9 is located on one side wall of the second groove 10. By designing the size of the second groove 10, the tilt angle of the optical reflecting surface 9 can be adjusted. Preferably, in order to ensure that the incident light is totally reflected by the optical reflecting surface 9, the tilt angle of the optical reflecting surface 9 is designed to be greater than the Brewster angle of total internal reflection of its material.

[0037] In an optional embodiment, a cover plate 6 is provided on the upper surface of the lens body 1 to cover the openings of the first groove 7 and the second groove 10, and at the same time, it can limit the wave combining module 8 in the first groove 7 to prevent it from moving up and down in the first groove 7.

[0038] The above examples are merely illustrative of the present invention and do not constitute a limitation on the scope of protection of the present invention. All designs that are the same as or similar to the present invention are within the scope of protection of the present invention.

Claims

1. A multimode wavelength division multiplexing lens, characterized in that: The lens includes a lens body, which has an incident light surface and an exit light surface. A beam combining module is disposed inside the lens body and is located in the optical path between the incident light surface and the exit light surface. The incident light surface is provided with several collimating lenses for collimating multiple optical signals of different wavelengths into the lens body. The exit light surface is provided with several converging lenses for converging the beam combining optical signals and expelling them from the lens body.

2. The multimode wavelength division multiplexing lens as described in claim 1, characterized in that: The lens body has a first groove for mounting the wave combiner module, and the first groove has a limiting part that limits the mounting position of the wave combiner module.

3. The multimode wavelength division multiplexing lens as described in claim 2, characterized in that: The lens body is provided with a cover plate on the opening side corresponding to the first groove.

4. The multimode wavelength division multiplexing lens as described in claim 1, characterized in that: The beam combining module includes a beam combining module, which is tilted at a certain angle relative to the converging lens. The beam combining module has several filters of different wavelengths arranged from top to bottom on the side corresponding to the light incident surface. A reflector is arranged on the opposite side of the filters on the beam combining module.

5. The multimode wavelength division multiplexing lens as described in claim 4, characterized in that: The filter and reflector are elongated structures capable of receiving multiple parallel optical paths.

6. The multimode wavelength division multiplexing lens as described in claim 1, characterized in that: When the light-incident surface and the light-exit surface are located on two mutually perpendicular sides of the lens body, the lens body is also provided with an optical reflecting surface for total internal reflection of the optical path between the light-incident surface and the beam combiner module.

7. The multimode wavelength division multiplexing lens as described in claim 6, characterized in that: The lens body has a second groove that is recessed inward, and the optical reflecting surface is located in the second groove.

8. The multimode wavelength division multiplexing lens as described in claim 6, characterized in that: The optical reflecting surface is arranged at an angle greater than Brewster's angle for total internal reflection of the material.

9. The multimode wavelength division multiplexing lens as described in claim 1, characterized in that: The lens body is integrally injection molded.

10. The multimode wavelength division multiplexing lens as described in claim 1, characterized in that: The light-incident surface is provided with an input fiber optic interface corresponding to the collimating lens, and the light-outcident surface is provided with an output fiber optic interface corresponding to the converging lens.

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