A high-coupling-efficiency high-return-loss integrated optical transceiver assembly

Abstract

The utility model discloses a kind of high-coupling efficiency high return loss index transceiving integrated optical assembly, it is related to optical device technical field. Including shell, collimating fiber adapter and BOX assembly, the shell is provided with second interface and third interface, the second interface is connected with BOX assembly, the second interface and third interface are respectively arranged in the two sides of shell, the third interface is connected with collimating fiber adapter, further include fixing piece, second coupling lens and adjusting ring, the second coupling lens is arranged in fixing piece, the BOX assembly is connected with adjusting ring, the adjusting ring is abutted on the end surface of fixing piece and is fixedly connected with fixing piece, the fixing piece is connected with second interface, the optical signal of BOX assembly is transmitted to collimating fiber adapter after second coupling lens. The utility model is installed second coupling lens by fixing piece, cooperate with adjusting ring, shell and BOX assembly, improve coupling efficiency by four-piece coupling mode.

Description

Technical Field

[0001] This utility model relates to the field of optical device technology, specifically providing a transceiver optical component with high coupling efficiency and high return loss performance. Background Technology

[0002] As core components in fields such as optical communication, lidar, and fiber optic sensing, the precise control of the optical path steering angle is a key technological anchor that determines the performance of optical devices. During optical device coupling, a coupling lens is placed between the BOX assembly and the housing. When the coupling lens couples with the collimating fiber optic adapter, a misalignment needs to be formed. This coupling misalignment brings out the required incident angle of the principal ray to the fiber optic adapter, and this method can achieve the optimal coupling efficiency.

[0003] However, existing coupling lenses are fixed to the housing via laser welding before the BOX assembly is connected to the housing. This coupling method requires fixing the coupling lens first, thus necessitating precise adjustment of its position during coupling. If the coupling lens is not positioned correctly, the BOX assembly and coupling lens must be removed, and the coupling lens position readjusted, resulting in a high rework probability and low coupling efficiency of the optical devices. Utility Model Content

[0004] This invention provides a high-coupling-efficiency, high-return-loss integrated optical transceiver component to solve the problem of low coupling efficiency in optical devices.

[0005] The technical solution of this utility model is as follows:

[0006] A high-coupling-efficiency, high-return-loss integrated optical transceiver component includes a housing, a collimating fiber adapter, and a BOX assembly. The housing has a second interface and a third interface. The second interface connects to the BOX assembly. The second and third interfaces are respectively located on opposite sides of the housing. The third interface connects to the collimating fiber adapter. The component also includes a fixing member, a second coupling lens, and an adjustment ring. The second coupling lens is mounted on the fixing member. The BOX assembly is connected to the adjustment ring, which abuts against the end face of the fixing member and is fixedly connected to it. The fixing member is connected to the second interface. The optical signal from the BOX assembly is transmitted to the collimating fiber adapter after passing through the second coupling lens. In this design, when the second coupling lens is installed, the BOX assembly, housing, and fixing member can be clamped separately. Then, any two of the BOX assembly, housing, and fixing member can be moved to form a four-piece coupling. By detecting the optical signal, it is determined whether the coupling lens has reached the optimal coupling position, thus improving the efficiency of installing the second coupling lens to the optimal coupling position.

[0007] To address the low adjustment efficiency of the coupling lens, an annular boss is provided at the end of the fixing member that connects to the second interface. This annular boss is inserted into the second interface, and its outer diameter is smaller than the diameter of the second interface. In this design, the annular boss, inserted into the second interface, restricts the movement range of the fixing member. Compared to the fixing member sliding freely along the housing surface, finding the optimal position of the second coupling lens within a constrained range is significantly more efficient.

[0008] Preferably, the adjusting ring is welded to the fixing component. After finding the optimal coupling position, welding can be used to fix the BOX assembly, adjusting ring, fixing component, and housing, thereby fixing the position of the second coupling lens.

[0009] The optical assembly requires internal reflectors to reflect the light beam to the receiving end. The installation of these reflectors relies on transition components, which inherently have inherent errors. The cumulative errors from multiple reflectors affect the quality of the optical assembly. The optical assembly also includes a receiving end. The housing has a first interface, and the receiving end connects to this first interface. The housing contains a light-passing channel and a positioning part for positioning lenses. The channel communicates with the first, second, and third interfaces, respectively. A first thin-film reflector and a second thin-film reflector are housed within the channel and fixed to the positioning part. In this design, because the positioning part is directly integrated into the housing, transition components are not required when installing the first and second thin-film reflectors. When transition components are not needed for the first and second thin-film reflectors, the accumulation of accuracy errors can be reduced when they are used with other lenses or structures, thus lowering the risk.

[0010] Preferably, the positioning part includes a positioning surface formed within the housing.

[0011] Preferably, the axis of the second interface is aligned with a positioning surface, which is inclined at an angle of 13° relative to the end face of the second interface. This 13° inclination angle allows the first thin-film reflector to better separate wavelengths that are relatively close together.

[0012] Preferably, the axis of the first interface is aligned with a positioning surface, which is inclined relative to the end face of the first interface at an angle of 32°.

[0013] Preferably, the housing is provided with an operation interface, which is located on opposite sides of the housing along with the first interface. The operation interface communicates with a channel and is used to install a lens. The operation interface is also provided with a cover. In this design, the operation interface facilitates the installation of the first and second thin-film reflectors, reducing operational difficulty. After the first and second thin-film reflectors are installed, the operation interface can be sealed with the cover to prevent external impurities from entering the housing and causing contamination.

[0014] Preferably, the system further includes a first coupling lens and a support member for supporting the first coupling lens. The support member is disposed within the housing, and a support surface is provided on the side of the support member away from the receiving end. The support surface is inclined relative to the end face of the first interface at an angle of 4°. The support member is provided with a through hole for light to pass through, and the axis of the through hole is perpendicular to the end face of the first interface. In this solution, by using the first coupling lens installed at an angle through the support member, when light is incident on the 4° first coupling lens, the outgoing main ray can be angled, improving return loss and reducing reflected light.

[0015] Preferably, the housing is a metal housing. In this design, a metal housing is easy to form.

[0016] The beneficial effects of this utility model are:

[0017] This invention uses a fixing component to install a second coupling lens, which works in conjunction with an adjustment ring, a housing, and a BOX assembly to improve coupling efficiency through a four-piece coupling method. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a bottom view of the present invention;

[0021] Figure 3 for Figure 2 Sectional view at point AA;

[0022] Figure 4 This is a partial sectional view of the second interface.

[0023] In the above figures, the corresponding reference numerals are as follows:

[0024] 1. Housing; 2. Box assembly; 3. Receiving end; 4. Fiber optic adapter; 5. Cover; 6. First interface; 7. Second interface; 8. Third interface; 9. First thin-film reflector; 10. Second thin-film reflector; 11. Operation interface; 12. Support; 13. First coupling lens; 14. Tilt lens; 15. Fixing component; 16. Adjustment ring; 17. Second coupling lens; 18. Annular protrusion. Detailed Implementation

[0025] The technical solution of this utility model will be clearly and completely described in conjunction with the accompanying drawings and through specific embodiments.

[0026] Example 1:

[0027] like Figure 1 As shown in the figure, this embodiment provides a high-coupling-efficiency, high-return-loss integrated optical transceiver component, including a housing 1, a BOX component 2, a receiver 3, and an optical fiber adapter 4. The housing 1 is respectively constructed with a first interface 6, a second interface 7, and a third interface 8, wherein the first interface 6 is connected to the receiver 3, the BOX component 2 is connected to the second interface 7, and the third interface 8 is connected to the optical fiber adapter 4. The housing 1 has an internal channel for light transmission, which communicates with the first interface 6, the second interface 7, and the third interface 8. The first interface 6, the second interface 7, and the third interface 8 are respectively located on three sides of the housing 1, and the overall shape of the channel is T-shaped. The second interface 7 and the third interface 8 are located on two opposite sides of the housing 1, and are coaxial.

[0028] like Figure 3 As shown, a first thin-film reflector 9 and a second thin-film reflector 10 are provided in the channel. When the light in the collimating fiber adapter 4 is transmitted to the first thin-film reflector 9, the light is reflected from the first thin-film reflector 9 to the second thin-film reflector 10, and then reflected by the second thin-film reflector 10 to the receiving end 3.

[0029] This embodiment improves the connection method of the second coupling lens 17 between the BOX component 2 and the collimating fiber optic adapter 4.

[0030] The second coupling lens 17 is positioned between the BOX assembly 2 and the collimating fiber optic adapter 4. In conventional methods, the second coupling lens 17 is pre-fixed to the housing 1 via adhesive bonding. The second coupling lens 17 and the collimating fiber optic adapter 4 cannot be coaxial; instead, the second coupling lens 17 and the collimating fiber optic adapter 4 need to be misaligned to achieve the required principal ray incident angle for the fiber optic adapter. This method achieves optimal coupling efficiency. However, this pre-fixation method of adhesive bonding of the second coupling lens 17 before assembly of the BOX assembly 2 requires extremely high installation precision due to the tolerance issues of the positioning holes.

[0031] like Figure 4 As shown, the assembly also includes a fixing member 15 and an adjusting ring 16. The second coupling lens 17 is fixedly connected to the fixing member 15. The BOX assembly 2 is connected to the adjusting ring 16, the adjusting ring 16 is connected to the fixing member 15, and the fixing member 15 is connected to the second interface 7. During connection, the BOX assembly 2, the fixing member 15, and the housing 1 are clamped by clamping structures such as grippers. Then, the BOX assembly 2 and the housing 1 are moved radially along the second interface 7 to misalign the coupling of the second coupling lens 17 with the collimating fiber optic adapter 4. Simultaneously, the optical power is detected to determine whether the second coupling lens 17 has reached the optimal coupling position. When the second coupling lens 17 and the collimating fiber optic adapter 4 reach the optimal coupling position, the fixing member 15 is fixedly connected to the housing 1 by laser welding. Then, the fixing member 15 is fixedly connected to the adjusting ring 16 by laser welding. Finally, the adjusting ring 16 is fixedly connected to the BOX assembly 2 by laser welding. During the assembly process, since the optimal coupling position is obtained through experiments of moving BOX component 2 and housing 1, the installation accuracy requirements of the second coupling lens 17 are greatly reduced, the installation difficulty of the second coupling lens 17 is reduced, and the efficiency of installing the second coupling lens 17 to the optimal coupling position is improved.

[0032] Similarly, the optimal coupling position can be found by fixing the housing 1 and moving the fixing piece 15 of the BOX component 2. Alternatively, the optimal coupling position can be found by fixing the BOX component 2 and moving the fixing piece 15 and the housing 1.

[0033] The BOX component 2, housing 1, fastener 15, and adjusting ring 16 form a four-piece coupling, thereby improving coupling efficiency.

[0034] The adjusting ring 16 is sleeve-shaped, with one end of the BOX assembly 2 inserted into the adjusting ring 16 and the other end of the adjusting ring 16 abutting against the end face of the fixing member 15. The presence of the adjusting ring 16 ensures that the movement of the BOX assembly 2 does not directly affect the position of the fixing member 15, making the relative position adjustment between the BOX assembly 2 and the fixing member 15 more flexible.

[0035] The fixing member 15 is cylindrical in shape and has a through hole, in which the second coupling lens 17 is fixed. An annular boss is provided at the end of the fixing member 15 that connects to the second interface 7. The annular boss is inserted into the second interface 7, and its outer diameter is smaller than the diameter of the second interface 7, allowing the fixing member 15 to move radially relative to the housing 1 along the second interface 7. The inner diameter of the annular boss is larger than the diameter of the through hole, and the through hole is located inside the annular boss. Light emitted from the BOC assembly 2 passes through the second coupling lens 17, then through the inside of the annular boss, and is transmitted to the collimating fiber optic adapter 4.

[0036] Example 2:

[0037] This second embodiment provides a transceiver optical component with high coupling efficiency and high return loss. Unlike the first embodiment, a positioning surface is provided inside the housing 1, and the positioning surface is directly constructed inside the housing 1.

[0038] The housing 1 contains positioning surfaces for supporting the first thin-film reflector 9 and the second thin-film reflector 10. The first thin-film reflector 9 and the second thin-film reflector 10 are respectively attached to their corresponding positioning surfaces. Therefore, the first thin-film reflector 9 and the second thin-film reflector 10 are directly fixedly connected to the housing 1. By improving the accuracy of the positioning surfaces, the positional accuracy of the first thin-film reflector 9 and the second thin-film reflector 10 can be precisely controlled without the need for transition parts, thus simplifying the components within the housing 1.

[0039] To facilitate the machining of the positioning surface at a suitable position in the channel, a positioning block is provided inside the housing 1, and then the positioning surface is machined on the positioning block.

[0040] The first thin-film reflector 9 and the second thin-film reflector 10 are used to reflect light. To avoid the positioning blocks obstructing the light transmission and to ensure stable fixation of the first thin-film reflector 9 and the second thin-film reflector 10, positioning blocks are respectively set on both sides of the channel. The first thin-film reflector 9 corresponds to two positioning blocks, and the positioning surfaces on the two positioning blocks are connected to both sides of the first thin-film reflector. Similarly, the second thin-film reflector 10 corresponds to two positioning blocks, and the positioning surfaces on the two positioning blocks are connected to both sides of the second thin-film reflector.

[0041] The casing 1 is made of metal, such as stainless steel or aluminum alloy. It is integrally formed using powder metallurgy, which has a cost advantage.

[0042] The first thin-film reflector 9 is tilted relative to the end face of the second interface 7 at an angle of 13°. The second thin-film reflector 10 is tilted relative to the end face of the first interface 6 at an angle of 32°. The combination of the 13° angle setting of the first thin-film reflector 9 and the 32° angle setting of the second thin-film reflector 10 serves two purposes: first, it redirects the light entering from the optical fiber towards the receiving chip; second, the 13° angle allows for better beam splitting of closely spaced wavelengths.

[0043] The first thin-film reflector 9 is a dichroic mirror, and the second thin-film reflector 10 is a total reflection mirror.

[0044] The first thin-film reflector 9 and the second thin-film reflector 10 need to be installed inside the housing 1. To facilitate installation, an operation interface 11 is provided on the housing 1. The first thin-film reflector 9 and the second thin-film reflector 10 can enter the housing 1 through the operation interface 11 and then be fixed inside the housing 1 by adhesive bonding or laser welding.

[0045] After the installation of the first thin-film reflector 9 and the second thin-film reflector 10 is completed, the operating interface 11 is sealed by the cover 5. The cover 5 and the operating interface 11 can be connected by threads, welding, or adhesive.

[0046] The operation interface 11 and the first interface 6 are located on opposite sides of the housing 1.

[0047] The housing 1 also includes a support member 12 for mounting the first coupling lens 13. This support member 12 is a cylindrical structure with steps, and the first coupling lens 13 is mounted on it. The housing 1 has a positioning groove adapted to the steps. The steps are annular structures on the support member 12. During installation, the support member 12 is inserted into the channel, and the steps abut against the positioning groove. The first coupling lens 13 focuses the light beam and couples it into the PD chip. An angle design was incorporated during assembly to allow the emitted main light beam to have an angle, improving return loss and reducing reflected light.

[0048] The combination of the step and the positioning groove can separate the channel from the first interface 6, forming two independent spaces that are separated from each other, thus preventing optical crosstalk.

[0049] The first coupling lens 13 is provided with a tilted lens 14 on the side near the housing 1. The tilted lens 14 is at a 4° angle to the end face of the first interface 6. The purpose of setting the tilted lens 14 at this angle is to improve the return loss setting and reduce the reflected light returning to the fiber optic adapter 4.

Claims

1. A high-coupling-efficiency, high-return-loss integrated optical transceiver component, comprising a housing, a collimating fiber adapter, and a BOX assembly, wherein the housing is provided with a second interface and a third interface, the second interface being connected to the BOX assembly, the second interface and the third interface being respectively disposed on both sides of the housing, and the third interface being connected to the collimating fiber adapter, characterized in that, It also includes a fixing component, a second coupling lens, and an adjustment ring. The second coupling lens is disposed on the fixing component. The BOX assembly is connected to the adjustment ring. The adjustment ring abuts against the end face of the fixing component and is fixedly connected to the fixing component. The fixing component is connected to the second interface. The optical signal of the BOX assembly is transmitted to the collimating fiber optic adapter after passing through the second coupling lens.

2. The high coupling efficiency and high return loss integrated optical transceiver component according to claim 1, characterized in that, The end of the fastener connected to the second interface is provided with an annular boss, which is inserted into the second interface. The outer diameter of the annular boss is smaller than the diameter of the second interface.

3. The high coupling efficiency and high return loss integrated optical transceiver component according to claim 1, characterized in that, The adjusting ring is welded to the fixing component, the fixing component is welded to the housing, and the adjusting ring is welded to the BOX assembly.

4. The high coupling efficiency and high return loss integrated optical transceiver component according to claim 1, characterized in that, It also includes a receiving end. The housing is provided with a first interface. The receiving end is connected to the first interface. The housing is constructed with a channel for light to pass through and a positioning part for positioning the lens. The channel is connected to the first interface, the second interface and the third interface respectively. A first thin film reflector and a second thin film reflector are provided in the channel. The first thin film reflector and the second thin film reflector are fixed to the positioning part respectively.

5. A high-coupling-efficiency, high-return-loss integrated optical transceiver component according to claim 4, characterized in that, The positioning part includes a positioning surface formed inside the housing.

6. The high coupling efficiency and high return loss integrated optical transceiver component according to claim 5, characterized in that, The axis of the second interface is aligned with a positioning surface, which is inclined at an angle of 13° relative to the end face of the second interface.

7. A high-coupling-efficiency, high-return-loss integrated optical transceiver component according to claim 5, characterized in that, The axis of the first interface is aligned with a positioning surface, which is inclined at an angle of 32° relative to the end face of the first interface.

8. The high coupling efficiency and high return loss integrated optical transceiver component according to claim 1, characterized in that, The housing is provided with an operation interface, which is respectively located on opposite sides of the housing with the first interface. The operation interface is connected to the channel and is used to install a lens. The operation interface is provided with a cover.

9. A high-coupling-efficiency, high-return-loss integrated optical transceiver component according to claim 1, characterized in that, It also includes a first coupling lens and a support member for supporting the first coupling lens. The support member is disposed inside the housing. The support member has a support surface on the side away from the receiving end. The support surface is inclined relative to the end face of the first interface at an angle of 4°. The support member has a through hole for light to pass through. The axis of the through hole is perpendicular to the end face of the first interface.

10. A high-coupling-efficiency, high-return-loss integrated optical transceiver component according to claim 1, characterized in that, The casing is a metal casing.

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