Multiplexer
By adopting metal shell structure and welding technology, the problem of optical path deviation caused by environmental changes in glass structure is solved, and the stability and accuracy of optical power are achieved.
Patent Information
- Application Number
- CN202423153076.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-10-30
- Filing Date
- 2024-12-20
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-12-20
AI Technical Summary
In the prior art, when environmental factors change, the optical path of a 1×2 combiner and a 1×2 demultiplexer using a glass structure is easily offset, resulting in unstable optical power intensity.
The metal shell structure is adopted. The metal assembly ring and the main ring are welded together, and the optical fiber components are welded inside the metal shell to ensure the relative position of each component is stable and avoid displacement caused by environmental factors.
It effectively maintains the stability of optical power, ensuring the accuracy of the optical path and the output intensity of optical power are not easily affected by environmental changes.
Smart Images
Figure CN223471167U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a multiplexer. BACKGROUND
[0002] Generally, the material and structure of 1x2 combiner and 1x2 splitter are mainly glass, which has the advantage that the coupling point glue can confirm the glue amount and the point glue position at the same time. When coupling light, there needs to be a larger gap between the glass parts to have space for adjusting the fiber-to-fiber optical power intensity, so a thicker glue is needed when filling the gap after curing. Because the glue has a larger expansion and contraction rate when the temperature changes, it is easy to cause the displacement of the components when the temperature changes between high and low temperatures, resulting in a large change in optical power intensity, and the thick glue is easy to deteriorate in a high temperature and high humidity environment, causing reliability problems. In view of this, the researchers in the field are working to solve the aforementioned problems. SUMMARY
[0003] The utility model provides a kind of multiplexer, can solve the problem that the light path derived from the combination of each component by using glass structure and point glue mode in the past is easy to deviate due to environmental factors and lead to the optical power not meeting the expected intensity.
[0004] One embodiment of the utility model discloses a kind of multiplexer, including a metal shell, a filter, a first fiber component and a second fiber component. Metal shell includes a main ring part, a first assembly ring part and a second assembly ring part, first assembly ring part is connected on the side of main ring part, and second assembly ring part is welded on the other side of main ring part. Filter is arranged in main ring part. First fiber component is welded in first assembly ring part. Second fiber component is welded in second assembly ring part.
[0005] According to the multiplexer disclosed in the above embodiment, by adopting a metal shell, the first assembly ring part of the metal shell is connected to the main ring part, the second assembly ring part of the metal shell is welded to the main ring part, the first fiber component is welded in the first assembly ring part of the metal shell, and the second fiber component is welded in the second assembly ring part of the metal shell. The relative positions of the main ring part, the first assembly ring part, the second assembly ring part, the first fiber component and the second fiber component are not easy to deviate due to environmental factors, and the output optical power intensity can be maintained.
[0006] The above description of the utility model content and the following description of the embodiment are used to demonstrate and explain the principle of the utility model, and provide further explanation for the protection scope of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0007] Figure 1 It is a perspective view of the multiplexer disclosed according to the first embodiment of the utility model.
[0008] Figure 2 Fig. 1 is a perspective view of a multiplexer according to a first embodiment of the present application. Figure 1
[0009] Figure 3 Fig. 2 is a sectional view of the multiplexer of Fig. 1. Figure 1
[0010] Figure 4 Fig. 3 is a sectional view of the multiplexer of Fig. 1 connected in series with another multiplexer. Figure 1
[0011] Figure 5 Fig. 4 is a sectional view of a multiplexer according to a second embodiment of the present application.
[0012]
BRIEF DESCRIPTION OF DRAWINGS
[0013] 1, 1', 1a: multiplexer
[0014] 10, 10a: metal housing
[0015] 11, 11a: main ring portion
[0016] 111: first end surface
[0017] 112: second end surface
[0018] 12, 12a: first assembly ring portion
[0019] 121: first inner ring wall surface
[0020] 13: second assembly ring portion
[0021] 131: second inner ring wall surface
[0022] 20, 20': filter
[0023] 30: first optical fiber assembly
[0024] 31: first housing member
[0025] 32: first bushing
[0026] 33: first lens
[0027] 34, 34', 35, 35': first optical fiber
[0028] 40: second optical fiber assembly
[0029] 41: second housing member
[0030] 42: second bushing
[0031] 43: second lens
[0032] 44, 44': second optical fiber DETAILED DESCRIPTION
[0033] See also Figures 1 to 3 . Figure 1 FIG1 is a three-dimensional diagram of a multiplexer according to an embodiment of the present invention. Figure 2 for Figure 1 Exploded view of the multiplexer. Figure 3 for Figure 1 A cross-sectional view of a multiplexer.
[0034] In this embodiment, the multiplexer 1 includes a metal housing 10 , a filter 20 , a first optical fiber component 30 , and a second optical fiber component 40 .
[0035] The metal housing 10 includes a main ring portion 11, a first assembly ring portion 12, and a second assembly ring portion 13. The filter 20 is made of, for example, glass and is disposed within the main ring portion 11. The main ring portion 11 has a first end face 111 and a second end face 112 that are opposed in the axial direction. The first assembly ring portion 12 and the second assembly ring portion 13 are, for example, laser welded to the first end face 111 and the second end face 112 of the main ring portion 11, respectively. The first assembly ring portion 12 has a first inner ring wall 121, and the second assembly ring portion 13 has a second inner ring wall 131.
[0036] The first optical fiber assembly 30 includes, for example but not limited to, a first shell 31, a first bushing 32, a first lens 33, and two first optical fibers 34 and 35. The first shell 31 is made of metal. The first assembly ring 12 is sleeved on the first shell 31, and the first shell 31 is, for example, laser welded to the first inner ring wall 121 of the first assembly ring 12. The first bushing 32 is, for example, made of glass or ceramic, and the first lens 33 is, for example, made of glass. The first bushing 32 and the first lens 33 are fixed in the first shell 31, and the first lens 33 is closer to the filter 20 than the first bushing 32. The first bushing 32 and the first lens 33 are separated by a distance, and the first bushing 32 and the first lens 33 correspond to each other at an inclined surface. The two first optical fibers 34 and 35 are partially embedded in the first bushing 32.
[0037] The second fiber assembly 40 includes, for example but not limited to, a second housing 41, a second sleeve 42, a second lens 43, and a second optical fiber 44. The second housing 41 is made of metal. The second assembly ring portion 13 is sleeved on the second housing 41, and the second housing 41 is, for example, laser welded on the second inner ring wall surface 131 of the second assembly ring portion 13. The second sleeve 42 is, for example, made of glass or ceramic, and the second lens 43 is, for example, made of glass. The second sleeve 42 and the second lens 43 are fixed in the second housing 41, and the second lens 43 is closer to the filter 20 than the second sleeve 42. The second sleeve 42 and the second lens 43 are separated by a distance, and the second sleeve 42 and the second lens 43 correspond to each other by a bevel. The second optical fiber 44 is partially embedded in the second sleeve 42.
[0038] Next, the assembly process of the multiplexer 1 will be described below. First, the two first optical fibers 34, 35 are inserted into the first sleeve 32, then glue is filled in the first sleeve 32 and cured, and then the end surface of the first sleeve 32 is ground. Next, the first sleeve 32 and the first lens 33 with the two first optical fibers 34, 35 inserted are placed into the first housing 31, and the relative positions of the first sleeve 32 and the first lens 33 are adjusted in the direction parallel to the Z axis to perform light coupling, so that the light entering one of the first optical fibers 34 is adjusted to be parallel to the Z axis after passing through the first lens 33. Then, glue is applied and cured in the first housing 31, so that the first sleeve 32 and the first lens 33 are fixed in the first housing 31. In this way, the first fiber assembly 30 is assembled. Similarly, the assembly steps of the second fiber assembly 40 are the same as those of the first fiber assembly 30, so they will not be described again.
[0039] Then, the filter 20 is placed into the main ring portion 11, and glue is applied and cured, so that the filter 20 is fixed in the main ring portion 11. Next, the first fiber assembly 30 is coupled with the filter 20 arranged in the main ring portion 11. In the process of coupling the first fiber assembly 30 with the filter 20 arranged in the main ring portion 11, the first fiber assembly 30 can be translated relative to the filter 20 in the directions parallel to the X axis, the Y axis and the Z axis, and can also be deflected relative to the filter 20 about the X axis and the Y axis, so that the light adjusted to be parallel to the Z axis after passing through the first optical fiber 34 and the first lens 33 is focused to the other first optical fiber 35 after being reflected by the filter 20 back to the first lens 33. When the measured optical power passing through the first optical fiber 35 reaches a set value, the light coupling between the first fiber assembly 30 and the filter 20 is completed.
[0040] Next, the first assembly ring portion 12 is sleeved on the first fiber assembly 30, the first assembly ring portion 12 is welded with the first end surface 111 of the main ring portion 11, and then the first assembly ring portion 12 is welded with the first housing 31 of the first fiber assembly 30.
[0041] During the welding process between the first assembly ring portion 12 and the first end face 111 of the main ring portion 11, for example, three laser guns can be used to initially direct lasers at three points spaced 120 degrees apart to initially secure the first assembly ring portion 12 and the main ring portion 11. Subsequently, the first assembly ring portion 12 and the main ring portion 11 are rotated, and three more laser guns are used to direct lasers at three additional points to further secure the first assembly ring portion 12 and the main ring portion 11. Similarly, the welding process between the first assembly ring portion 12 and the first shell 31 of the first optical fiber assembly 30 can be similar to the welding process between the first assembly ring portion 12 and the first end face 111 of the main ring portion 11, except that the laser beam must penetrate the first assembly ring portion 12. Therefore, a higher laser energy must be applied when welding the first assembly ring portion 12 to the first shell 31 of the first optical fiber assembly 30.
[0042] During the above-mentioned welding process, if there is a slight relative displacement between the first assembly ring portion 12, the main ring portion 11 and the first shell portion 31, resulting in a slight deviation in the optical power output from the first optical fiber 35, additional laser welding points can be added to fine-tune the relative positions of the first assembly ring portion 12, the main ring portion 11 and the first shell portion 31 so that the optical power output from the first optical fiber 35 is adjusted to the set value.
[0043] Next, the second optical fiber assembly 40 is optically coupled with the filter 20 disposed within the main ring portion 11, and the second assembly ring portion 13 is then welded to the main ring portion 11 and the second shell 41 of the second optical fiber assembly 40, thereby completing the assembly process of the multiplexer 1. Similarly, the optical coupling process between the second optical fiber assembly 40 and the filter 20 and the welding process between the second assembly ring portion 13 and the main ring portion 11 and the second shell 41 are similar to the optical coupling process between the first optical fiber assembly 30 and the filter 20 and the welding process between the first assembly ring portion 12 and the main ring portion 11 and the first shell 31, and therefore will not be repeated here.
[0044] In this embodiment, the multiplexer 1 can function as a demultiplexer (Demux). For example, when light with wavelengths λ1 and λ2 passes through the first optical fiber 34 and reaches the filter 20, the light is split by the filter 20 into light with wavelength λ1 and light with wavelength λ2. The light with wavelength λ1 exits through the first optical fiber 35, while the light with wavelength λ2 exits through the second optical fiber 44. In another example, when light with wavelengths λ1, λ2, λ3, and λ4 passes through the first optical fiber 34 and reaches the filter 20, the light is split by the filter 20 into light with wavelengths λ1 and λ2 and light with wavelengths λ3 and λ4. The light with wavelengths λ1 and λ2 exits through the first optical fiber 35, while the light with wavelengths λ3 and λ4 exits through the second optical fiber 44.
[0045] On the other hand, the multiplexer 1 can function as a multiplexer (Mux). For example, when light with a wavelength of λ1 passes through the first optical fiber 35 and reaches the filter 20, and light with a wavelength of λ2 passes through the second optical fiber 44 and reaches the filter 20, the two lights are combined by the filter 20 into light with wavelengths of λ1 and λ2. The light with wavelengths of λ1 and λ2 then exits through the first optical fiber 34.
[0046] Next, see Figure 4 , Figure 4 for Figure 1 A cross-sectional view of a multiplexer 1 connected in series with another multiplexer is shown. Multiplexer 1 can be connected in series with another multiplexer 1', where the structure of multiplexer 1' is, for example, but not limited to, the same as that of multiplexer 1. For example, when light with wavelengths λ1, λ2, λ3, λ4, λ5, and λ6 passes through the first optical fiber 34 of multiplexer 1 and reaches filter 20, the light is separated by filter 20 into light with wavelengths λ1 and λ2 and light with wavelengths λ3, λ4, λ5, and λ6. Light with wavelengths λ1 and λ2 exits through the first optical fiber 35, while light with wavelengths λ3, λ4, λ5, and λ6 is transmitted through the second optical fiber 44 to the first optical fiber 35' of multiplexer 1'. Then, when light with wavelengths λ3, λ4, λ5, and λ6 passes through the first optical fiber 35' of the multiplexer 1' and reaches the filter 20', the light is separated by the filter 20' into light with wavelengths λ3 and λ4 and light with wavelengths λ5 and λ6. The light with wavelengths λ3 and λ4 exits through the first optical fiber 34', while the light with wavelengths λ5 and λ6 exits through the second optical fiber 44'.
[0047] In this embodiment, by adopting a metal shell 10, the first assembly ring portion 12 and the second assembly ring portion 13 of the metal shell 10 are welded to the main ring portion 11, the first optical fiber component 30 is welded inside the first assembly ring portion 12 of the metal shell 10, and the second optical fiber component 40 is welded inside the second assembly ring portion 13 of the metal shell 10. This configuration can prevent the relative positions of the main ring portion 11, the first assembly ring portion 12, the second assembly ring portion 13, the first optical fiber component 30 and the second optical fiber component 40 from being easily shifted due to environmental factors, and the output optical power intensity can be maintained.
[0048] In this embodiment, the first assembly ring portion 12 and the second assembly ring portion 13 of the metal housing 10 are not limited to being welded to the first end surface 111 and the second end surface 112 of the main ring portion 11, respectively. In other embodiments, the main ring portion may be sleeved over the first assembly ring portion and the second assembly ring portion, and the first assembly ring portion and the second assembly ring portion may be welded to the inner wall surface of the main ring portion 11.
[0049] It should be noted that the first assembly ring portion 12 of the metal housing 10 is not limited to being connected to the main ring portion 11 by welding. Figure 5 ,Figure 5 A cross-sectional view of a multiplexer according to a second embodiment of the present application.
[0050] The multiplexer 1a of the present embodiment is similar to the multiplexer 1 of the above-mentioned embodiment, and the difference between them is mainly in the structure of the metal housing. Therefore, the metal housing 10a of the multiplexer 1a of the present embodiment will be mainly described below, and the other parts will not be described again.
[0051] In the present embodiment, the first assembly ring part 12a of the metal housing 10a is integrally formed on one side of the main ring part 11a. That is, the first assembly ring part 12a and the main ring part 11a of the metal housing 10a are one-piece components.
[0052] According to the multiplexer disclosed in the above-mentioned embodiments, by adopting the metal housing, the first assembly ring part of the metal housing is connected to the main ring part, the second assembly ring part of the metal housing is welded to the main ring part, the first fiber assembly is welded in the first assembly ring part of the metal housing, and the second fiber assembly is welded in the second assembly ring part of the metal housing, so that the relative positions between the main ring part, the first assembly ring part, the second assembly ring part, the first fiber assembly and the second fiber assembly are not easily deviated by environmental factors, and the output optical power intensity can be maintained.
[0053] In addition, during the welding process, if the main ring part, the first assembly ring part, the second assembly ring part, the first fiber assembly and the second fiber assembly have some relative displacement between each other, so that the output optical power has some slight deviation, the relative positions between the main ring part, the first assembly ring part, the second assembly ring part, the first fiber assembly and the second fiber assembly can be fine-tuned by additionally supplementing the welding points, so that the output optical power is adjusted to the set value.
Claims
1. A multiplexor, characterized by, The metal shell comprises a main ring portion, a first assembly ring portion connected to one side of the main ring portion, and a second assembly ring portion welded to the other side of the main ring portion. The filter is disposed in the main ring portion. The first fiber assembly is welded in the first assembly ring portion. The second fiber assembly is welded in the second assembly ring portion. The first assembly ring portion is welded to one side of the main ring portion.
2. The multiplexer of claim 1, wherein, The main ring portion has a first end face and a second end face opposite in the axial direction, and the first assembly ring portion and the second assembly ring portion are welded to the first end face and the second end face, respectively.
3. The multiplexer of claim 2, wherein, The first assembly ring portion is integrally connected to one side of the main ring portion.
4. The multiplexer of claim 1, wherein, The first assembly ring portion has a first inner ring wall surface, the first fiber assembly is sleeved in the first assembly ring portion and is welded to the first inner ring wall surface, the second assembly ring portion has a second inner ring wall surface, and the second fiber assembly is sleeved in the second assembly ring portion and is welded to the second inner ring wall surface.
5. The multiplexer of claim 1, wherein, The first fiber assembly comprises a first shell, a first bushing, a first lens, and two first optical fibers, the first shell is welded in the first assembly ring portion, the first bushing and the first lens are located in the first shell, the first lens is closer to the filter than the first bushing, and two first optical fibers are partially embedded in the first bushing.
6. The multiplexer of claim 1, wherein, The second fiber assembly comprises a second shell, a second bushing, a second lens, and a second optical fiber, the second shell is welded in the second assembly ring portion, the second bushing and the second lens are located in the second shell, the second lens is closer to the filter than the second bushing, and the second optical fiber is partially embedded in the second bushing.
7. The multiplexer of claim 6, wherein, The first bushing and the first lens are cemented in the first shell, and the second bushing and the second lens are cemented in the second shell.
8. The multiplexer of claim 7, wherein, The first bushing and the first lens are separated by a distance, and the second bushing and the second lens are separated by a distance.
9. The multiplexer of claim 7, wherein, The first bushing and the first lens correspond to bevel surfaces, and the second bushing and the second lens correspond to bevel surfaces.
10. The multiplexer of claim 7, wherein,