A new six-port WDM device for fast assembly
By designing a novel six-port WDM device with optical filters, self-focusing lenses, and fiber optic pigtails, combined with high borosilicate glass tubes and UV-curing adhesives, the problems of large size, complex structure, and slow packaging of WDM devices were solved, enabling rapid assembly and simplified production, thus improving production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 深圳市飞宇光纤股份有限公司
- Filing Date
- 2025-10-20
- Publication Date
- 2026-07-21
AI Technical Summary
Existing WDM devices are large in size, complex in structure, slow in packaging, and have long production cycles, making it difficult to integrate and miniaturize MUX and DEMUX.
A novel structural design employs an optical filter, a self-focusing lens, and an optical fiber pigtail. High borosilicate glass tubes are used as connecting bridges, and UV-curing adhesive is used to achieve rapid assembly. The optical filter and lens are bonded together with adhesive, and the optical fiber pigtail is fixed to the glass tube with adhesive, simplifying the production process.
It enables miniaturization, rapid packaging, and simplified production of WDM devices, reduces the risk of misconfiguration, improves yield, and shortens production cycle.
Smart Images
Figure CN224536211U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a wavelength division multiplexing (WDM) technology, specifically a novel six-port WDM device that can be assembled quickly. Background Technology
[0002] In wavelength division multiplexing (WDM) systems, multiplexers (MUX) and demultiplexers (DEMUX) are the core passive devices that enable the transmission of multi-wavelength signals in a single optical fiber. The two are functionally symmetrical and work together, which is the key support for WDM technology to move from concept to large-scale application.
[0003] Minimizing the size of MUX (multiplexer) and DEMUX (demultiplexer) and integrating them is one of the core technological challenges in the field of optical communication. Achieving this goal depends not only on breakthroughs in materials science and manufacturing processes, but also on disruptive innovations in device structure design. Utility Model Content
[0004] The purpose of this invention is to provide a novel six-port WDM device that can be assembled quickly, in order to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A novel six-port WDM device for rapid assembly includes an optical filter located at the center of the device, the optical filter being a rectangular crystal.
[0007] A first self-focusing lens and a second self-focusing lens are respectively arranged on both sides of the optical filter; four fiber optic pigtails are also arranged on the side of the first self-focusing lens away from the optical filter, and two fiber optic pigtails are arranged on the side of the second self-focusing lens away from the optical filter.
[0008] The novel six-port WDM device for rapid assembly as described above: the rectangular crystal includes a glass substrate and a multilayer dielectric film, one side of the rectangular crystal has a reflective film and the other side has an antireflective film.
[0009] The novel six-port WDM device that can be assembled quickly as described above: The first self-focusing lens and the second self-focusing lens have the same structure, with one end at an 8-degree angle and the other end at a 0-degree angle, and both ends are coated with anti-reflective coatings.
[0010] The novel six-port WDM device that can be assembled quickly as described above: the first self-focusing lens and the four fiber optic pigtails are fixed together by a first glass tube, and the second self-focusing lens and the two fiber optic pigtails are fixed together by a second glass tube.
[0011] The novel six-port WDM device described above for rapid assembly: the first and second glass tubes have the same structure, both made of high borosilicate glass, and are used as connecting bridges.
[0012] The novel six-port WDM device that can be assembled quickly as described above: The four-fiber pigtail includes a four-hole capillary tube and four optical fibers. The four optical fibers are inserted into the four-hole capillary tube and fixed by adhesive. One end of the four optical fibers serves as a pigtail, and the other end is ground to form an 8-degree bevel and coated with an anti-reflection film.
[0013] The novel six-port WDM device for rapid assembly as described above: The dual-fiber pigtail includes a double-hole capillary tube and two optical fibers. The two optical fibers are inserted into the double-hole capillary tube and fixed by adhesive. One end of the two optical fibers serves as a pigtail, and the other end is ground to form an 8-degree bevel and coated with an anti-reflection film.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: the novel six-port WDM device includes an optical filter, two self-focusing lenses, and two fiber pigtails; compared with the traditional WDM device combination packaging structure, it has the advantages of smaller size, simpler structure, faster packaging, shorter manufacturing cycle, and simpler production operation, while its optical performance is comparable to that of traditional WDM devices. Therefore, it is more compact in structure, faster in packaging and assembly, shorter in production cycle, and simpler in process. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of a traditional WDM device.
[0016] Figure 2 A schematic diagram of the internal design structure of a novel six-port WDM device for rapid assembly.
[0017] In the diagram: 100 - optical filter; 200 - self-focusing lens No. 1; 300 - self-focusing lens No. 2; 400 - glass tube No. 1; 500 - glass tube No. 2; 600 - four fiber optic pigtails; 700 - two fiber optic pigtails. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0019] Please see Figures 1-2 As an embodiment of the present invention, the novel six-port WDM device for rapid assembly includes an optical filter 100 located at the middle position of the device.
[0020] The optical filter 100 is a rectangular crystal, which includes a glass substrate and multiple dielectric films; wherein, the material, refractive index and thickness of each dielectric film are different.
[0021] The rectangular crystal has a reflective film on one side and an antireflective film on the other side, allowing λ1 to be transmitted and λ2, λ3...λn-1, λn to be reflected.
[0022] A first self-focusing lens 200 and a second self-focusing lens 300 are respectively provided on both sides of the optical filter 100; a four-fiber pigtail 600 is also provided on the side of the first self-focusing lens 200 away from the optical filter 100, and a dual-fiber pigtail 700 is provided on the side of the second self-focusing lens 300 away from the optical filter 100.
[0023] This novel six-port WDM device includes an optical filter 100, two self-focusing lenses, and two fiber pigtails. Compared with the traditional WDM device combination packaging structure, it has the advantages of smaller size, simpler structure, faster packaging, shorter manufacturing cycle, and simpler production operation. Its optical performance is comparable to that of traditional WDM devices. Therefore, it is more compact in structure, faster in packaging and assembly, shorter in production cycle, and simpler in process.
[0024] As a further embodiment of this utility model, the first self-focusing lens 200 and the second self-focusing lens 300 have the same structure, with one end at an 8-degree angle and the other end at a 0-degree angle, and both ends are coated with an anti-reflective film.
[0025] Since the No. 1 self-focusing lens 200 and the No. 2 self-focusing lens 300 have the same structure, they are more compatible in terms of structural components, and the risk of misconfiguration during assembly is lower, which means that the yield rate is effectively improved.
[0026] As a further embodiment of this utility model, the first self-focusing lens 200 and the four-fiber pigtail 600 are fixed together by a first glass tube 400, and the second self-focusing lens 300 and the dual-fiber pigtail 700 are fixed together by a second glass tube 500.
[0027] Specifically, the optical filter 100 is bonded and integrated with the first self-focusing lens 200 and the second self-focusing lens 300 on both sides by UV-curing adhesive. The first self-focusing lens 200 is also bonded to the first glass tube 400 by UV-curing adhesive, and the second self-focusing lens 300 is bonded to the second glass tube 500 by UV-curing adhesive.
[0028] Finally, the four-fiber pigtail 600 and the first glass tube 400 are bonded together with UV-curing adhesive, and the two-fiber pigtail 700 and the second proportional tube 500 are bonded together with UV-curing adhesive (the black part in the picture is the UV-curing adhesive).
[0029] In this way, the optical filter 100, the self-focusing lens, and the fiber optic pigtail can be integrated into one unit.
[0030] As a further embodiment of this utility model, the first glass tube 400 and the second glass tube 500 have the same structure and are both made of high borosilicate glass, and are used as connecting bridges.
[0031] High borosilicate glass has a very low coefficient of thermal expansion, meaning its volume changes very little with temperature variations. Furthermore, it has high transparency, allowing light to pass through clearly while absorbing almost no visible light. In addition, although high borosilicate glass has high hardness, it also possesses a degree of toughness, enabling it to withstand certain mechanical impacts.
[0032] As a further embodiment of this utility model, the four-fiber pigtail 600 includes a four-hole capillary tube and four optical fibers. The four optical fibers are inserted into the four-hole capillary tube and fixed by adhesive. One end of the four optical fibers serves as a pigtail, and the other end is ground to form an 8-degree bevel and coated with an anti-reflection film.
[0033] One end of the four-fiber pigtail 600 extends out of the device as a pigtail, while the 8-degree bevel end coated with antireflective film is adapted and connected to the 8-degree angle end of the first self-focusing lens 200.
[0034] As a further embodiment of this utility model, the dual-fiber pigtail 700 includes a double-hole capillary tube and two optical fibers. The two optical fibers are inserted into the double-hole capillary tube and fixed by adhesive. One end of the two optical fibers serves as a pigtail, and the other end is ground to form an 8-degree bevel and coated with an anti-reflection film.
[0035] Similarly, one end of the dual-fiber pigtail 700 extends out of the device as a pigtail, while the 8-degree bevel end coated with antireflective film is adapted and connected to the 8-degree angle end of the second self-focusing lens 300.
[0036] Finally, to better illustrate the production process during this period, a detailed explanation is provided below:
[0037] 1. Preliminary preparation process
[0038] First, fix the reflective surface of the optical filter 100 to the plane of the first self-focusing lens 200 with UV-curing adhesive; then fix the transmissive surface of the optical filter 100 to the plane of the second self-focusing lens 300 with UV-curing adhesive; fix the optical filter 100 and the self-focusing lens assembly (first self-focusing lens 200 and second self-focusing lens 300) on the optical platform, and place four fiber optic pigtails 600 and two fiber optic pigtails 700 on the inclined surfaces of the left and right lenses respectively, ensuring that the three components are relatively horizontal and that the inclined surfaces of the lenses and the inclined surfaces of the fiber optic pigtails are parallel.
[0039] 2. Debugging process flow
[0040] ① Reflection Adjustment: Adjust the assembly of the four-fiber pigtail 600 with the filter lens module formed by the combination of optical filter 1 and self-focusing lens. The reflected light signal λ2 (a wavelength can be arbitrarily selected from λ2, λ3...λn-1, λn) enters from the COM1 port of the four-fiber pigtail 600, passes through the filter lens module, and is coupled and received at the Ref1 port of the four-fiber pigtail 600. After receiving the signal at the Ref1 port of the four-fiber pigtail 600, connect the Ref1 port of the four-fiber pigtail 600 to the COM2 port of the four-fiber pigtail 600 (cold splicing or fusion splicing of the fiber optic alignment can be used), and then use the Ref2 port of the four-fiber pigtail 600 to couple and receive the light signal λ2. After receiving the signal, the reflection part adjustment is completed. Use UV-curing adhesive to fix the four-fiber pigtail 600 and the filter lens module through the No. 1 glass tube 400.
[0041] ① Transmission debugging: After the dual fiber optic pigtail 700 and the filter lens module are fixed, the filter lens module and the other end of the dual fiber optic pigtail 700 continue to be debugged. The transmitted light signal λ1 enters simultaneously from the COM1 port and COM2 port of the four fiber optic pigtail 600. It is coupled at the Pass1 port and Pass2 port of the dual fiber optic pigtail 700 respectively. After the two Pass ports receive the light signal at the same time, the fixing operation can be performed. Use UV curing adhesive to fix the dual fiber optic pigtail 700 and the filter lens module through the second glass tube 500.
[0042] After the aforementioned preliminary preparation and debugging process, a new six-port WDM device can be manufactured. The entire process is completed at a single workstation, eliminating the need for a separate production line. Simultaneously, the adhesive can be cured, eliminating the need for sequential curing. In contrast, traditional WDM devices require separate processes for reflection and transmission calibration, necessitating workstation changes and overlapping adhesive curing times. This innovative production process effectively reduces the usable area of the workstations and significantly decreases the waiting time for adhesive curing, thereby effectively increasing production capacity.
[0043] The above embodiments are exemplary and not restrictive. Therefore, without departing from the spirit or basic characteristics of this utility model, any technical solutions that can be implemented in other specific forms are included in this utility model.
Claims
1. A novel six-port WDM device for rapid assembly, characterized in that, Includes an optical filter (100) located at the middle of the device, wherein the optical filter (100) is a rectangular crystal; A first self-focusing lens (200) and a second self-focusing lens (300) are respectively provided on both sides of the optical filter (100); a four-fiber pigtail (600) is also provided on the side of the first self-focusing lens (200) away from the optical filter (100), and a dual-fiber pigtail (700) is provided on the side of the second self-focusing lens (300) away from the optical filter (100).
2. The novel six-port WDM device for rapid assembly according to claim 1, characterized in that, The rectangular crystal comprises a glass substrate and a multilayer dielectric film, with a reflective film on one side and an antireflective film on the other side.
3. A novel six-port WDM device for rapid assembly according to claim 1, characterized in that, The first self-focusing lens (200) and the second self-focusing lens (300) have the same structure, with one end at an 8-degree angle and the other end at a 0-degree angle, and both ends are coated with anti-reflective coatings.
4. A novel six-port WDM device for rapid assembly according to claim 3, characterized in that, The first self-focusing lens (200) and the four-fiber pigtail (600) are fixed together by a first glass tube (400), and the second self-focusing lens (300) and the dual-fiber pigtail (700) are fixed together by a second glass tube (500).
5. A novel six-port WDM device for rapid assembly according to claim 4, characterized in that, The first glass tube (400) and the second glass tube (500) have the same structure and are both made of high borosilicate glass, and are used as connecting bridges.
6. A novel six-port WDM device for rapid assembly according to claim 3, characterized in that, The four-fiber pigtail (600) includes a four-hole capillary tube and four optical fibers. The four optical fibers are inserted into the four-hole capillary tube and fixed by adhesive. One end of the four optical fibers serves as a pigtail, and the other end is ground to form an 8-degree bevel and coated with an anti-reflection film.
7. A novel six-port WDM device for rapid assembly according to claim 3, characterized in that, The dual-fiber pigtail (700) includes a double-hole capillary tube and two optical fibers. The two optical fibers are inserted into the double-hole capillary tube and fixed by adhesive. One end of the two optical fibers serves as a pigtail, and the other end is ground to form an 8-degree bevel and coated with an anti-reflection film.