EPON (Ethernet Passive Optical Network) optical device shell and system
By designing structures such as wave combination unit, adjustment unit, reflection slope and isolator in the EPON optical device housing, the problem of large housing volume and weight in the prior art is solved, and a small package structure and high optical integration are achieved.
Patent Information
- Application Number
- CN202420582150.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-25
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-03-25
AI Technical Summary
In the existing optical communication technology, the packaging layout of the EPON optical device housing structure is unreasonable, the process is difficult and the processing cost is high, resulting in a large shell volume and large weight, and the small packaging structure cannot be realized.
An EPON optical device housing is designed, and the first input light and the second input light are compounded using a combined wave unit, and an adjustment unit is provided on the combined wave beam transmission path for reflection of the third input light. Through structures such as reflection slopes and isolators, a small package structure and high optical integration are achieved.
The goal of shortening the overall size, reducing volume and weight, improving optical integration, reducing powder metallurgy processing costs, and achieving the goal of small-size packaging.
Smart Images
Figure CN223038214U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optical communication, in particular to an EPON optical device housing and system. Background Art
[0002] With the rapid development of optical fiber communication, fiber access has become the mainstream of broadband development. The development of Ethernet Passive Optical Network (EPON) technology has become the latest development trend of access networks in the world. In access networks, the wavelength division multiplexing technology (WDM technology) is adopted in EPON technology, which can realize that a single channel can transmit optical carriers of multiple different wavelengths, doubling the transmission capacity of optical fibers. As the core component of the EPON system, the 10GEPON OLT requires the housing structure of EPON optical devices for optical path transmission to achieve stable duplex data transmission of the OLT optical transceiver module in the same optical fiber. At present, in existing optical communication technologies, the packaging layout of the housing structure is unreasonable, the process difficulty is large and the processing cost is high, and a small packaging structure cannot be realized, resulting in a large housing volume and weight. Therefore, there is an urgent need for an EPON optical device housing and system to solve the above problems. Summary of the Utility Model
[0003] To solve the above problems, on the one hand, the utility model provides an EPON optical device housing, which includes a housing body with a cavity. The housing body is provided with a first optical emission port, a second optical emission port, an optical reception port and an optical port end that are respectively communicated with the cavity. A multiplexing unit for multiplexing the first input light incident through the first optical emission port and the second input light incident through the second optical emission port to the optical port end is arranged in the cavity. An adjusting unit is arranged on the multiplexed light beam transmission path, and the adjusting unit is used for reflecting the third input light incident through the optical port end to the optical reception port.
[0004] Further, the multiplexing unit includes a first diaphragm, the first diaphragm has a first working surface and a second working surface, the first input light is incident on the first working surface and is transmitted to the optical port end, and the second input light is incident on the second working surface and is reflected to the optical port end.
[0005] Further, the included angle between the first input light and the first diaphragm is 45°, and the included angle between the second input light and the first diaphragm is 45°.
[0006] Further, a reflection inclined surface for reflecting the reflected light of the first input light away from the first diaphragm through the first working surface is further arranged in the cavity.
[0007] Further, the reflection inclined surface is located below the first diaphragm.
[0008] Further, an isolator is also provided on the path of the multiplexed light beam, and the isolator is located between the multiplexing unit and the adjusting unit.
[0009] Further, the adjusting unit includes a second diaphragm.
[0010] Further, a collimating unit is provided on the third input light transmission path. The collimating unit includes a third diaphragm, and the optical axis of the third input light reflected by the adjusting unit is perpendicular to the third diaphragm.
[0011] Further, a black glue support frustum for bonding a detector is provided at the optical receiving port.
[0012] On the other hand, the present invention also provides an EPON optical device system, including a housing, a first optical transmitter, a second optical transmitter, a detector, and a pin. The housing adopts the above-mentioned housing. The first optical transmitter is connected to the first optical emission port, the second optical transmitter is connected to the second optical emission port, the detector is connected to the optical receiving port, and the pin is connected to the optical port end.
[0013] Due to the above technical solutions, the present invention has the following beneficial effects compared with the prior art:
[0014] 1) The EPON optical device housing provided by the present invention uses a multiplexing unit to combine the first input light and the second input light, and an adjusting unit for reflecting the third input light is provided on the path of the multiplexed light beam. During the optical path transmission, the overall size can be shortened, the functions of reducing the volume and improving the optical integration degree can be realized, the weight can be reduced, and a small-size package can be achieved.
[0015] 2) The EPON optical device housing provided by the present invention can make the reflected light of the first input light away from the first diaphragm by setting a reflection inclined plane, preventing optical crosstalk of the second input light caused by internal reflection.
[0016] 3) The EPON optical device housing provided by the present invention sets an isolator on the optical path between the first diaphragm and the second diaphragm. By adopting a shared isolator scheme, a small package structure can be realized, and the internal assembly space can be saved. Description of the Drawings
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0018] Figure 1 Schematic structure of the EPON optical device housing provided for Example 1 Figure One ;
[0019] Figure 2 Schematic structure of the EPON optical device housing provided for Example 1 Figure Two ;
[0020] Figure 3 Schematic structure of the EPON optical device housing provided for Example 1 Figure Three ;
[0021] Figure 4 Schematic diagram of the optical path of the first input light in the EPON optical device housing provided for Example 1;
[0022] Figure 5 Schematic diagram of the optical path of the second input light in the EPON optical device housing provided for Example 1;
[0023] Figure 6 Schematic diagram of the optical path of the third input light in the EPON optical device housing provided for Example 1.
[0024] 1 - housing body; 2 - second optical emission port; 3 - first optical emission port; 4 - optical reception port; 5 - optical port end; 6 - first diaphragm; 7 - second diaphragm; 8 - third diaphragm; 9 - reflection inclined plane; 10 - isolator; 11 - first placement area; 111 - first diaphragm support platform; 112 - first diaphragm support surface; 12 - second placement area; 13 - third placement area; 131 - third diaphragm support platform; 14 - fourth placement area; 15 - glue overflow groove; 16 - black glue support round platform; 17 - first installation part; 18 - second installation part; 19 - third installation part. Detailed implementation manners
[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. In the accompanying drawings, for clarity, the dimensions and relative dimensions of some parts may be enlarged.
[0026] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connection" and "connected" shall be interpreted in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0027] In the description of the present utility model, the orientation or positional relationships such as "upper", "lower", "left", "right", "front", "rear", "center", "horizontal", "vertical", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.
[0028] In addition, in the description of the present utility model, the terms "first" and "second" are only used for distinction in description, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.
[0029] Embodiment 1
[0030] As shown in the Figure 1-3 accompanying drawings, the present utility model provides an EPON optical device housing, which includes a housing body 1 having a cavity. The housing body 1 is provided with a first optical emission port 3, a second optical emission port 2, an optical reception port 4, and an optical port end 5 that are respectively communicated with the cavity. A multiplexing unit for multiplexing the first input light incident through the first optical emission port 3 and the second input light incident through the second optical emission port 2 to the optical port end 5 is provided in the cavity. An adjusting unit is provided on the multiplexed light beam transmission path, and the adjusting unit is used for reflecting the third input light incident through the optical port end 5 to the optical reception port 4.
[0031] In this embodiment, the first input light, the second input light, and the third input light are preferably lights with different wavelengths. After the first input light and the second input light are multiplexed by the multiplexing unit, the multiplexed light beam is incident on the optical port end 5 after passing through the adjusting unit, and the third input light passing through the optical port end 5 is incident on the optical reception port 4 after being reflected by the adjusting unit.
[0032] As one of the specific embodiments, the housing body 1 is square, the first light emission port 3 and the second light emission port 2 are arranged on two adjacent end faces of the housing body 1, the optical port end 5 is arranged on the side opposite to the first light emission port 3 of the housing body 1, and the optical reception port 4 is arranged on the side opposite to the second light emission port 2 of the housing body 1.
[0033] In an optimized embodiment, the multiplexing unit includes a first diaphragm 6. The first diaphragm 6 has a first working surface and a second working surface. The first input light is incident on the first working surface and transmitted to the optical port end 5, and the second input light is incident on the second working surface and reflected to the optical port end 5. The first working surface and the second working surface are respectively two surfaces of the first diaphragm 6.
[0034] In an optimized embodiment, the adjusting unit includes a second diaphragm 7.
[0035] Preferably, in this embodiment, the wavelength of the first input light is 1577 nm, the wavelength of the second input light is 1490 nm, and the wavelength of the third input light is 1270 nm. The first input light passes through the first diaphragm 6 and the second diaphragm 7 and is transmitted into the optical port end 5. The second input light is reflected by the first diaphragm 6 and transmitted by the second diaphragm 7 and then enters the optical port end 5. The third input light is reflected by the second diaphragm 7 and then enters the optical reception port 4.
[0036] Preferably, the first diaphragm 6 is preferably a filter that can transmit the first input light and reflect the second input light, and the second diaphragm 7 is preferably a filter that can allow the first input light and the second input light to pass through and reflect the third input light.
[0037] In an optimized embodiment, the second reflected light of the second input light reflected by the second working surface of the second diaphragm 6 enters the second diaphragm 7, and the first input light passes through the first diaphragm 6 and then enters the second diaphragm 7. A small amount of the first input light is reflected on the first working surface of the first diaphragm 6 to form a first reflected light. To prevent the first reflected light from causing optical crosstalk to the second input light after being reflected inside the housing body 1, a reflection inclined surface 9 for deflecting the reflected light of the first input light incident on the first working surface away from the first diaphragm 6 is further provided in the cavity. The reflection inclined surface 9 is located on the optical path of the first reflected light; as shown in the Figure 2 accompanying drawings, the reflection inclined surface 9 is arranged below the first diaphragm 6. A small amount of the first input light is reflected by the first working surface of the first diaphragm 6 and then reflected by the reflection inclined surface 9, avoiding optical crosstalk to the second input light.
[0038] Optimized implementation mode, the inclination angle of the reflection inclined plane 9 is 15°. In this embodiment, when the first input light enters the first diaphragm 6, most of the first input light passes through the first diaphragm 6, and a small amount of the first input light is reflected by the first working surface of the first diaphragm 6 to form the first reflected light. The first reflected light is incident on the reflection inclined plane 9 and is reflected by the reflection inclined plane 9 away from the first diaphragm 6, avoiding optical crosstalk caused by the reflection of the first input light to the second input light.
[0039] Optimized implementation mode, an isolator 10 is further provided on the path of the combined light beam transmission. The isolator 10 is located between the multiplexing unit and the adjustment unit; specifically, the isolator 10 is located on the optical path between the first diaphragm 6 and the second diaphragm 7. After the first input light is transmitted through the first diaphragm 6, it passes through the isolator 10 by deflection and refraction and passes through the second diaphragm 7 and enters the optical port end 5. After the second input light is reflected by the first diaphragm 6, it passes through the isolator 10 by deflection and refraction and then passes through the second diaphragm 7 and enters the optical port end 5. The first input light and the second input light share one isolator 10, which can save the internal assembly space and realize a small package structure.
[0040] Optimized implementation mode, a collimation unit is provided on the path of the third input light transmission. The collimation unit includes a third diaphragm 8, and the optical axis of the third input light reflected by the second diaphragm 7 is perpendicular to the third diaphragm 8.
[0041] As one of the specific implementation modes, the included angle between the first input light and the first diaphragm 6 is 45°, and the included angle between the second input light and the first diaphragm 6 is 45°.
[0042] As one of the specific implementation modes, the included angle between the third input light and the second diaphragm 7 is 44°.
[0043] As one of the specific implementation modes, during use, the third diaphragm 8 is placed horizontally.
[0044] Preferably, a first placement area 11, a second placement area 12 and a third placement area 13 are provided in the cavity. The first diaphragm 6 is bonded to the first placement area 11, the second diaphragm 7 is bonded to the second placement area 12, and the third diaphragm 8 is bonded to the third placement area 13; the first diaphragm 6, the second diaphragm 7 and the third diaphragm 8 are bonded to the corresponding placement areas by an adhesive, and the adhesive is preferably a high-reliability epoxy resin glue.
[0045] Specific implementation manner. The first placement area 11 includes a first diaphragm support platform 111 and a first diaphragm supporting surface 112. The bottom of the first diaphragm 6 is placed on the first diaphragm support platform 111, and the first diaphragm 6 abuts against the first diaphragm supporting surface 112 and is fixed by an adhesive. The adhesive is preferably a high-reliability epoxy resin glue. The structure of the second placement area 12 is the same as that of the first placement area 11 and will not be elaborated here. The third placement area 13 includes a third diaphragm support platform 131, and the third diaphragm 8 is horizontally placed on the third diaphragm support platform 131.
[0046] Preferably, a fourth placement area 14 is further provided in the cavity, and the isolator 10 is bonded to the fourth placement area 14.
[0047] During the bonding process of the first diaphragm 6, the second diaphragm 7, the third diaphragm 8, and the isolator 10, in order to avoid glue overflow, glue overflow grooves 15 are provided on the first placement area 11, the second placement area 12, the third placement area 13, and the fourth placement area 14, which can be used to hold the overflowing glue and prevent the glue from overflowing and affecting the optical path.
[0048] Preferably, the first optical emission port 3 is preferably an adjustment ring mating hole to facilitate the installation of the first optical emitter; the second optical emission port 2 is preferably an adjustment ring mating hole to facilitate the installation of the second optical emitter; the optical port end 5 is a pin mating hole for soldering the pin; a black glue support round platform 16 is provided on the optical reception port 4 for bonding the detector.
[0049] Preferably, a first mounting portion 17 and a second mounting portion 18 are provided on both sides of the first optical emission port 3. The first mounting portion 17 and the second mounting portion 18 protrude outside the housing 1 to facilitate the installation of the first optical emitter. A third mounting portion 19 is provided at one end of the optical port end 5 away from the black glue support round platform 16 to facilitate the installation of the pin.
[0050] Optimized implementation manner. Inside the housing, the angle tolerance of each diaphragm placement area is ±0.5°, the positioning dimension tolerance is ±0.05 mm, and the other dimension tolerance is ±0.03 mm. The welding plane requires a flatness of 0.02, and local root clearing treatment and flatness treatment are required.
[0051] As shown in the Figure 4 specification appendix, it is a schematic diagram of the optical path of the first input light. The emitted light with a wavelength of 1577 nm can sequentially pass through the second optical emission port 3 of the housing 1, pass through the first diaphragm 6, pass through the isolator 10 by deflection and refraction, pass through the second diaphragm 7, and finally enter the optical port end 5.
[0052] As shown in the Figure 5As shown in the figure, it is a schematic diagram of the optical path of the second input light. The emitted light with a wavelength of 1490 nm can sequentially pass through the first optical emission port 2 of the housing 1, be reflected by the first diaphragm 6, pass through the isolator 10 by deflection and refraction, pass through the second diaphragm 7, and finally enter the optical port end 5.
[0053] As shown in the attached Figure 6 figure, it is a schematic diagram of the optical path of the third input light. The incident light with a wavelength of 1270 nm can sequentially pass through the optical port end 5 of the housing 1, be reflected by the second diaphragm 7, pass through the third diaphragm 8, and then enter the optical receiving port 4 of the housing 1.
[0054] In this way, during the process of optical path transmission, the overall size can be shortened, the volume can be reduced, and the optical integration degree can be improved; during the use of powder metallurgy, it is beneficial to reduce the processing cost of powder metallurgy and reduce the weight. Thus, the effects of reducing the volume, improving the optical integration degree, and reducing the powder metallurgy processing cost are achieved.
[0055] Embodiment 2
[0056] The present invention also provides an EPON optical device system, which includes a housing, a first optical transmitter, a second optical transmitter, a detector, and a pin. The housing is the housing as described in Embodiment 1. The first optical transmitter is connected to the first optical emission port 3, the second optical transmitter is connected to the second optical emission port 2, the detector is connected to the optical receiving port 4, and the pin is connected to the optical port end 5. A combination of 4 ports can be integrated on the housing body 1. The first optical transmitter is preferably a laser, which can provide light with a wavelength of 1577 nm. The second optical transmitter is preferably a laser, which can provide light with a wavelength of 1490 nm. The optical port end is provided with a pin fitting hole for welding the pin; the detector is arranged at the optical receiving port 4 to receive light as the receiving end.
[0057] Meanwhile, the content not detailedly described in this specification belongs to the well-known prior art in the art.
[0058] Those skilled in the art of this technology should understand that the present invention can be implemented in many other specific forms without departing from the spirit and scope of the present invention. Although the embodiments of the present invention have been described, it should be understood that the present invention should not be limited to these embodiments. Those skilled in the art of this technology can make changes and modifications within the spirit and scope of the present invention defined by the appended claims.
Claims
1. An EPON optical device housing, comprising a housing body having a cavity, characterized in that: The shell body is provided with a first light emitting port, a second light emitting port, a light receiving port and a light port end which are respectively connected to the cavity; the cavity is provided with a combining unit for combining a first input light incident through the first light emitting port and a second input light incident through the second light emitting port to the light port end; an adjustment unit is provided on the combined light beam transmission path, and the adjustment unit is used to reflect a third input light incident through the light port end to the light receiving port.
2. The EPON optical device housing according to claim 1, characterized in that: The wave combining unit includes a first diaphragm having a first working surface and a second working surface. The first input light is incident on the first working surface and transmitted to the optical port end. The second input light is incident on the second working surface and reflected to the optical port end.
3. The EPON optical device housing according to claim 2, characterized in that: The included angle between the first input light and the first diaphragm is 45°, and the included angle between the second input light and the first diaphragm is 45°.
4. The EPON optical device housing according to claim 2, characterized in that: The cavity is also provided with a reflective inclined surface for directing reflected light of the first input light reflected by the first working surface away from the first diaphragm.
5. The EPON optical device housing according to claim 4, characterized in that: The reflective inclined surface is located below the first diaphragm.
6. The EPON optical device housing according to claim 1, characterized in that: An isolator is also provided on the combined light beam transmission path, and the isolator is located between the combined light beam unit and the adjustment unit.
7. The EPON optical device housing according to claim 1, characterized in that: The regulating unit includes a second diaphragm.
8. The EPON optical device housing according to claim 1, characterized in that: A collimating unit is provided on the third input light transmission path. The collimating unit includes a third diaphragm. The optical axis of the third input light reflected by the adjusting unit is perpendicular to the third diaphragm.
9. The EPON optical device housing according to claim 1, characterized in that: The light receiving port is provided with a black glue supporting truncated table for bonding the detector.
10. An EPON optical device system, comprising a housing, a first optical transmitter, a second optical transmitter, a detector and a pin, characterized in that: The shell adopts the shell described in any one of claims 1-9, the first light emitter is connected to the first light emission port, the second light emitter is connected to the second light emission port, the detector is connected to the light receiving port, and the pin is connected to the optical port.