Socket and optical waveguide connector

Abstract

This invention relates to a socket and an optical waveguide connector. The socket has a first mating end for mating with a compatible plug, and a second mating end fixed to the waveguide input or output end of an optical waveguide printed circuit board (PCB). The socket contains an optical fiber contact; the first mating end of the optical fiber contact mates with the MT contact in the plug, and the second mating end mates with the waveguide port on the PCB. The waveguide port and the MT contact in the plug are interconnected through the optical fiber contact. The socket of this invention has one end fixed to the PCB and does not require insertion or removal, while the other end can be repeatedly inserted and removed from the plug. Signal interconnection between the optical waveguide and the plug's optical fiber is achieved through the insertion and removal of the socket and plug, improving the pluggability of the PCB and solving the problem of severe wear on the waveguide end face and high coupling loss caused by frequent insertion and removal, which affects waveguide transmission performance.

Description

Technical Field

[0001] This invention relates to the field of optical waveguide connector technology, specifically a socket and an optical waveguide connector. Background Technology

[0002] Waveguides, well-known in the art, are common components used to transmit electromagnetic waves from a point of origin to a point of destination. For waves propagating in open space, power is lost with increasing distance, thus reducing the possible transmission distance and wave quality. Therefore, a waveguide is a structure suitable for guiding waves by restricting the direction of wave propagation in at least one dimension. The concept is to confine the wave, thereby forcing it to propagate in a specific direction and reducing losses. The concept of waveguides has long been known and used for transmitting, for example, signals, sound, or light.

[0003] Optical waveguides are typically fabricated on a waveguide plate using photolithography, resulting in a rectangular cross-section. The waveguide's input and output ends usually need to be coupled to the optical fiber in a MT connector. The optical fiber in the MT connector has a circular cross-section, causing a mode mismatch between the waveguide and MT fiber cross-sections. Furthermore, due to the different materials of the waveguide plate and the MT ferrule, the end-face quality of the waveguide plate after grinding is inconsistent, resulting in end-face gaps between the waveguide and the fiber, leading to high coupling loss. In addition, repeated insertion and removal of the waveguide from the MT ferrule causes wear on the waveguide end-face, further increasing the coupling loss between the waveguide and the fiber and affecting the waveguide's transmission performance. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a socket and an optical waveguide connector. The socket enables signal interconnection between the optical waveguide printed circuit board (PCB) and the MT (Medium-Transfer) contact. One end of the socket is fixed to the PCB and does not require insertion or removal, while the other end can be repeatedly inserted and removed from the MT. The interlocking of the socket and MT achieves signal interconnection between the optical waveguide and the MT fiber, improving the pluggability of the PCB and solving the problem of severe wear on the waveguide end face and high coupling loss caused by frequent insertion and removal, which affects the waveguide transmission performance.

[0005] This invention is specifically achieved through the following technical solution. Firstly, a socket is proposed, defining one end of the socket that engages with the adapter plug as the front and the other end as the rear. The front and rear ends of the socket are respectively a first engagement end and a second engagement end. The first engagement end is used to connect with the adapter plug, and the second engagement end is fixed to the waveguide input or output end of the optical waveguide printed circuit board. This socket enables signal interconnection between the optical waveguide printed circuit board and the plug. An optical fiber contact is assembled inside the socket. The front and rear ends of the optical fiber contact are respectively a first mating end and a second mating end. The first mating end is used to mate with the MT contact in the plug, and the second mating end is used to mate with the waveguide port on the optical waveguide printed circuit board. The optical fiber contact includes a housing I and an optical fiber assembled in the housing I. The two ends of the optical fiber are located at the first mating end and the second mating end, respectively. The waveguide port of the optical waveguide printed circuit board and the MT contact in the plug achieve signal interconnection through the optical fiber contact.

[0006] In the above technical solution, the signal interconnection between the optical waveguide in the optical waveguide printed circuit board and the MT contact in the plug is achieved through the optical fiber contact in the socket. The socket is fixed on the optical waveguide printed circuit board. Therefore, the plug-in connection between the optical waveguide printed circuit board and the plug can be achieved simply by plugging the socket and the plug together. This greatly improves the pluggability of the optical waveguide printed circuit board and solves the problem of waveguide end face wear caused by frequent plugging and unplugging affecting the waveguide transmission performance.

[0007] In the aforementioned socket, both the first and second mating ends of the optical fiber contact are compatible with the MT ferrule in the MT contact, thereby reducing the coupling loss between the optical fiber contact and the optical waveguide.

[0008] The aforementioned socket has a mounting groove I at its second mating end, in which the optical fiber contact is assembled. The rear end of the mounting groove I is provided with a positioning step for positioning the optical fiber contact.

[0009] The aforementioned socket has slots at the waveguide input and output ends of the optical waveguide printed circuit board, and the second mating end of the socket is fixed in the slot and reinforced by a cover plate.

[0010] Furthermore, mounting ears are provided on both sides of the cover plate, a first positioning post is provided at the front end of the cover plate, and a second positioning post is provided at the rear end. Both the first and second positioning posts are perpendicular to the surface of the cover plate. The front end of the cover plate refers to the end where the cover plate is connected to the socket, and the rear end of the cover plate refers to the end where the cover plate is connected to the optical waveguide printed circuit board.

[0011] Furthermore, positioning grooves II are provided on both sides of the socket housing for assembling the first positioning post at the front end of the cover plate to fix the socket to the cover plate; mounting grooves II are provided on both sides of the slot of the optical waveguide printed circuit board, and mounting ears are assembled in the mounting grooves II and fixed with screws, thereby fixing the cover plate to the optical waveguide printed circuit board. The fixation between the positioning grooves II and the first positioning post and the fixation between the mounting ears and the mounting grooves II ensure the reliability of the connection between the socket and its internal optical fiber contacts and the optical waveguide printed circuit board.

[0012] Furthermore, the optical waveguide printed circuit board is also provided with positioning holes for installing the second positioning post. The second positioning post and the positioning holes work together to reinforce the reliability of the connection between the socket and its internal optical fiber contacts and the optical waveguide printed circuit board.

[0013] Furthermore, the optical waveguide printed circuit board includes an optical waveguide board and a printed circuit board stacked on top of each other, with an optical waveguide on the side of the optical waveguide board that contacts the printed circuit board; the slotting includes a first slot on the optical waveguide board and a second slot on the printed circuit board, the waveguide transmission direction is defined as the width direction of the slot, and the direction parallel to the optical waveguide printed circuit board and perpendicular to the width of the slot is defined as the length direction of the slot, the length of the first slot is greater than the length of the second slot, and the width of the first slot is less than the width of the second slot.

[0014] Furthermore, bosses are provided on both sides of the second slot along its length, and the mounting slot II is provided on the bosses; after the optical waveguide board and the printed circuit board are stacked and assembled in place, the two bosses are precisely inserted into the first slot, and the upper surface of the bosses is flush with the upper surface of the optical waveguide board, with the waveguide port suspended.

[0015] Furthermore, positioning grooves I are provided on both sides of the first slotted waveguide port. When the second mating end of the socket is connected to the optical waveguide printed circuit board, the two positioning steps at the end of the mounting groove I are respectively inserted into the positioning groove I, so that the second mating end of the optical fiber contact is connected to the waveguide port, and optical adhesive is also applied to the mating surface of the second mating end and the waveguide port.

[0016] The present invention also provides an optical waveguide connector, which includes a plug and a socket, wherein the socket adopts the aforementioned socket and the plug adopts an MPO plug.

[0017] Compared with existing technologies, this invention has significant advantages and beneficial effects. Through the above technical solution, this invention achieves considerable technological advancement and practicality, and has broad application value, possessing at least the following advantages:

[0018] (1) The present invention realizes the signal interconnection between the optical waveguide printed circuit board and the plug MT contact through the socket. One end of the socket is fixed on the optical waveguide printed circuit board and does not need to be plugged in or out, while the other end can be plugged in and out with the plug multiple times. The signal interconnection between the optical waveguide and the plug fiber is realized through the plugging and unplugging of the socket and the plug, which improves the pluggability of the optical waveguide printed circuit board and solves the problem of severe wear of the waveguide end face and large coupling loss caused by frequent plugging and unplugging, which affects the waveguide transmission performance.

[0019] (2) The socket of this invention is equipped with an optical fiber contact, the two end faces of which are compatible with commercially available standard MT ferrules, reducing the coupling loss between the optical fiber contact and the MT ferrule in the optical waveguide or plug, resulting in strong compatibility and good adaptability. Applying optical adhesive to the mating surface between the optical fiber contact and the optical waveguide further reduces additional losses caused by mode mismatch, etc. The cover plate and its structural design improve the reliability of the connection between the socket and its internal optical fiber contact, the optical waveguide printed circuit board, and the plug.

[0020] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the optical waveguide connector of the present invention being properly mated.

[0022] Figure 2 yes Figure 1 The exploded diagram.

[0023] Figure 3 This is a schematic diagram of the optical fiber contact.

[0024] Figure 4 This is a cross-sectional view of the fiber optic contact.

[0025] Figure 5 This is a schematic diagram of the structure of the first mating end of the socket housing.

[0026] Figure 6 This is a schematic diagram of the structure of the second mating end of the socket housing.

[0027] Figure 7 This is a schematic diagram of the optical waveguide plate.

[0028] Figure 8 This is a schematic diagram of the printed circuit board.

[0029] Figure 9 This is a structural diagram of the cover plate.

[0030] Figure 10This is a schematic diagram of the socket being fixed to the optical waveguide printed circuit board.

[0031] [Component and Symbol Explanation]:

[0032] 1-Socket; 18-Guide sloping surface I;

[0033] 2-Plug; 19-Mounting slot I;

[0034] 3-Socket housing; 20-Positioning step;

[0035] 4-Fiber optic contact; 21-Slot;

[0036] 5-Shell I; 21.1-First slot;

[0037] 6-Fiber optic cable; 21.2-Second slot;

[0038] 7-Injection groove; 22-Boss;

[0039] 8 - First mating end of the socket; 23 - Mounting slot II;

[0040] 9-Second mating end of the socket; 24-Positioning slot I;

[0041] 10 - First mating end of fiber optic contact; 25 - Cover plate;

[0042] 11-Second mating end of fiber optic contact; 26-Mounting ear;

[0043] 12 - Fiber optic connector; 27 - Screw hole I;

[0044] 13-Guide pin hole; 28-Screw hole II;

[0045] 14-Optical waveguide printed circuit board; 29-First positioning post;

[0046] 14.1 - Optical waveguide plate; 30 - Positioning groove II;

[0047] 14.2 - Printed circuit board; 31 - Second positioning post;

[0048] 15 - Waveguide port; 32 - Positioning hole;

[0049] 16-Elastic element; 32.1-Positioning hole I;

[0050] 17-Step I; 33.2-Positioning hole II. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments and accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of protection, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0052] The present invention provides an optical waveguide connector comprising a socket 1 and a plug 2. The plug may be an MPO plug, and the MPO plug is equipped with an MT contact. The socket includes a socket housing 3 and an optical fiber contact 4 assembled in the socket housing. The optical fiber contact includes a housing 5 and an optical fiber 6 assembled in the housing 5. In one embodiment, the housing 5 is provided with a glue injection groove 7, through which glue is injected into the housing 5 to fix the optical fiber in the housing 5.

[0053] Define the end of the socket where it is plugged in as the front and the other end as the back. The front and back ends of the socket are the first plugging end 8 and the second plugging end 9, respectively. The first plugging end is used to plug into the plug, and the second plugging end is fixed to the waveguide input end or waveguide output end of the optical waveguide printed circuit board.

[0054] The optical fiber contact includes a first mating end 10 and a second mating end 11, located at the front and rear ends of the optical fiber contact, respectively. The two ends of the optical fiber are located at the first and second mating ends, respectively. In one embodiment, both the first and second mating ends include an optical fiber mating port 12 and two symmetrically arranged guide pin holes 13. The first mating end is used to mate with the MT contact in the plug and is pluggable. The second mating end is used to mate with the waveguide port 15 on the optical waveguide printed circuit board 14 and is not pluggable after mating. The waveguide port 15 of the optical waveguide printed circuit board and the MT contact in the plug achieve signal interconnection through the optical fiber contact.

[0055] In one embodiment, the first and second mating ends have the same structure and are both compatible with commercially available MT ferrules. Their interfaces and materials are the same as those of standard commercial MT ferrules.

[0056] In one embodiment, the first mating end of the socket is provided with two symmetrical elastic elements 16. One end of each elastic element is connected to the socket housing, and the other end is a free end. The free ends of the two elastic elements can elastically contract inward to the first mating end of the socket housing by a certain distance, thereby reducing the distance between the free ends of the two elastic elements to ensure that the two elastic elements have a certain clamping force. Alternatively, the free ends of the two elastic elements can elastically expand outward to the first mating end of the socket housing, thereby increasing the distance between the free ends of the two elastic elements to facilitate insertion with the plug. The inner wall of the free end of the elastic element is also provided with a raised step I 17. The mating end of step I is also provided with a guide slope I 18. Correspondingly, the mating end of the plug housing is provided with a guide slope II (guide slope II is not shown in the figure). The guide slope I and guide slope II cooperate to guide the head seat for insertion. After the connector is fully inserted, the steps I of the two elastic elements engage with the positioning platform at the plug housing's mating end (the positioning platform at the plug's mating end is not shown in the figure). While exerting a significant clamping force on the plug, the two elastic elements prevent the connector from separating through the cooperation between the steps I and the positioning platform, thus ensuring the reliability of the connector insertion. Maintaining insertion reliability through elastic elements after the first mating end of the socket is inserted into the plug is a mature existing technology, and will not be elaborated upon further in this invention.

[0057] The second mating end of the socket is provided with a mounting groove I 19 for assembling the optical fiber contact 4. A positioning step 20 is provided at the rear end of the mounting groove I for positioning the optical fiber contact assembled in the mounting groove I. In one embodiment, the bottom of the optical fiber contact is fixed to the mounting groove I by adhesive. After the optical fiber contact is assembled into the mounting groove I, it forms the second mating end of the socket, which is used to mate with the optical waveguide printed circuit board. The waveguide input end and waveguide output end of the optical waveguide printed circuit board are provided with slots 21 for mounting the mounting groove I of the second mating end of the socket. The optical waveguide printed circuit board 14 includes an optical waveguide board 14.1 and a printed circuit board 14.2 stacked vertically. The side of the optical waveguide board that contacts the printed circuit board (i.e., the bottom of the optical waveguide board) is provided with an optical waveguide. Figure 7 and Figure 8 As shown, the slot 21 includes a first slot 21.1 located on the optical waveguide plate and a second slot 21.2 located on the printed circuit board.

[0058] The waveguide transmission direction is defined as the width direction of the slot, and the direction parallel to the optical waveguide printed circuit board and perpendicular to the width is defined as the length direction of the slot. The length of the first slot is greater than the length of the second slot, and the width of the first slot is less than the width of the second slot. Bosses 22 are also provided on both sides of the second slot's length direction on the printed circuit board. The height of the bosses is equal to the thickness of the optical waveguide board, and mounting slots II 23 are provided on the bosses. Positioning slots I 24 are also provided on both sides of the waveguide port of the first slot on the optical waveguide board for assembling the two positioning steps at the end of mounting slot I. The structure after the optical waveguide board and the printed circuit board are stacked and assembled in place is as follows... Figure 2As shown, the two bosses fit perfectly into the first slot, and the upper surface of the bosses is flush with the upper surface of the optical waveguide plate, while the waveguide port is suspended.

[0059] In one embodiment, the mounting groove I is rectangular, and the slots 21 at the input and output ends of the optical waveguide printed circuit board are also rectangular. When the second mating end of the socket is connected to the optical waveguide printed circuit board, the two positioning steps at the end of the mounting groove I are respectively inserted into the two positioning slots I 24 on the optical waveguide board. The second mating end 9 of the optical fiber contact is connected to the waveguide port. The second mating end of the optical fiber contact is aligned and adjusted with the optical waveguide of the waveguide port. After the alignment is completed, the mounting groove I is fixed to the slot of the optical waveguide printed circuit board with adhesive. Then, an optical adhesive with a refractive index is applied to the mating surface of the waveguide port and the optical fiber contact to reduce additional losses caused by mode mismatch between the optical waveguide and the optical fiber mating port, end face gaps, etc. Excess optical adhesive can flow through the positioning groove I into the second slot, preventing it from flowing into the guide pin hole of the optical fiber contact.

[0060] To ensure reliable connection between the socket and fiber optic contacts and the waveguide printed circuit board, the socket also includes a cover plate 25. Mounting ears 26 are provided on both sides of the cover plate. A first positioning post 29 is provided at the front end of the cover plate, and a second positioning post 31 is provided at the rear end. Both the first and second positioning posts are perpendicular to the surface of the cover plate. The front end of the cover plate refers to the end where the cover plate connects to the socket, and the rear end of the cover plate refers to the end where the cover plate connects to the waveguide printed circuit board.

[0061] The socket housing is also provided with positioning grooves II 30 on both sides for mounting the first positioning post at the front end of the cover plate to fix the socket to the cover plate. The mounting ears are provided with screw holes I 27, and the mounting groove II 23 of the waveguide printed circuit board is provided with screw holes II 28. The center distance between the two screw holes I is equal to the center distance between the two screw holes II. After the second mating end of the socket is installed and fixed into the slot of the waveguide printed circuit board, the two first positioning posts on the cover plate are inserted into the positioning grooves II on both sides of the socket housing to fix the socket to the cover plate. The two mounting ears on the cover plate are installed in the two mounting grooves II on the waveguide printed circuit board. The screw holes I and II correspond and are fastened together with screws, thereby fixing the cover plate to the waveguide printed circuit board. The fixation between the positioning grooves II and the first positioning posts, and between the mounting ears and the mounting grooves II, ensures the reliability of the connection between the socket and its internal fiber optic contacts and the waveguide printed circuit board.

[0062] Furthermore, the optical waveguide printed circuit board is also provided with positioning holes 32 for mounting the second positioning post. The positioning holes 32 include positioning hole I 32.1 on the optical waveguide board and positioning hole II 32.2 on the printed circuit board, with positioning hole I and positioning hole II corresponding vertically. The cooperation between the second positioning post and the positioning holes further strengthens the reliability of the connection between the socket and its internal fiber optic contacts and the optical waveguide printed circuit board.

[0063] The above embodiments are only used as examples of single-layer multi-column optical waveguides. In other embodiments, the optical waveguide printed circuit board can be designed as a multi-layer multi-column optical waveguide according to requirements. Correspondingly, the number of optical fiber layers and columns in the optical fiber contact are the same as the number of optical fiber layers and columns in the optical waveguide printed circuit board, and the number of optical fiber layers and columns in the plug MT contact are the same as the number of optical fiber layers and columns in the optical fiber contact. The remaining structural settings are the same as in the aforementioned embodiments, and will not be described again in this invention.

[0064] In other embodiments, the guide pin hole at the first mating end of the optical fiber contact can also be replaced with a guide post. Correspondingly, the mating surface of the plug MT contact that mates with the optical fiber contact is provided with a guide pin hole.

[0065] This invention achieves the connection between the waveguide port on the optical waveguide printed circuit board and the MT ferrule of the MPO plug through an optical fiber contact. After the socket is fixed to the optical waveguide printed circuit board, it can be left unplugged and unplugged when not needed. When plugging or unplugging, it is only necessary to plug and unplug the first mating end of the socket with the MT ferrule of the plug. This improves the reliability of repeated plugging and unplugging and solves the problem of end-face wear caused by frequent plugging and unplugging of the waveguide end face of the optical waveguide printed circuit board, which affects the transmission performance of the optical waveguide.

[0066] The above description is merely an embodiment of the present invention and is not intended to limit the present invention in any way. The present invention can also have other embodiments based on the above structure and function, which will not be listed hereafter. Therefore, any simple modifications, equivalent changes, and alterations made by those skilled in the art to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A socket, defined as having one end where the socket and the adapter plug are inserted as the front and the other end as the rear, wherein the front and rear ends of the socket are respectively the first insertion end (8) and the second insertion end (9), characterized in that... The first mating end (8) is used to mate with the plug, and the second mating end (9) is fixed to the waveguide input end or waveguide output end of the optical waveguide printed circuit board (14); the socket is equipped with an optical fiber contact (4), which includes a housing I (5) and an optical fiber (6) assembled in the housing I (5). The front and rear ends of the optical fiber contact (4) are the first mating end (10) and the second mating end (11), respectively. The first mating end (10) is used to mate with the MT contact in the plug, and the second mating end (11) is used to mate with the waveguide port (15) on the optical waveguide printed circuit board; the waveguide port of the optical waveguide printed circuit board and the MT contact in the plug are interconnected by the optical fiber contact (4); the waveguide input end and the waveguide output end of the optical waveguide printed circuit board (14) are provided with slots (21), and the second mating end (9) of the socket is fixed in the slots (21) and connected by a cover plate (25). Reinforcement; mounting ears (26) are provided on both sides of the cover plate (25), a first positioning post (29) is provided at the front end of the cover plate (25), and a second positioning post (31) is provided at the rear end. The first positioning post (29) and the second positioning post (31) are both perpendicular to the surface of the cover plate (25); positioning grooves II (30) are provided on both sides of the socket housing for assembling the first positioning post (29) to fix the socket to the cover plate; mounting grooves II (23) are also provided on both sides of the slot (21) of the optical waveguide printed circuit board (14). The mounting ears (26) are assembled in the mounting grooves II (23) and fixed with screws, so that the cover plate (25) is fixed on the optical waveguide printed circuit board (14). The reliability of the connection between the socket and its internal optical fiber contact and the optical waveguide printed circuit board is guaranteed by the fixing between the positioning grooves II (30) and the first positioning post (29) and the mounting ears (26) and the mounting grooves II (23).

2. The socket as described in claim 1, characterized in that... Both the first and second mating ends of the fiber optic contact are compatible with the MT ferrule in the MT contact.

3. The socket as described in claim 1, characterized in that... The second mating end of the socket is provided with a mounting groove I (19), the optical fiber contact is assembled in the mounting groove I, and the end of the mounting groove I is provided with a positioning step (20) for positioning the optical fiber contact.

4. The socket as described in claim 1, characterized in that... The optical waveguide printed circuit board is provided with positioning holes (32) for mounting the second positioning post at the rear end of the cover plate. The second positioning post and the positioning hole work together to reinforce the reliability of the connection between the socket and the optical fiber contact inside it and the optical waveguide printed circuit board.

5. The socket as described in claim 1, characterized in that... The optical waveguide printed circuit board includes an optical waveguide board (14.1) and a printed circuit board (14.2) stacked on top of each other. The side of the optical waveguide board that contacts the printed circuit board is provided with an optical waveguide. The slot (21) includes a first slot (21.1) on the optical waveguide board and a second slot (21.2) on the printed circuit board. The waveguide transmission direction is defined as the width direction of the slot, and the direction parallel to the optical waveguide printed circuit board and perpendicular to the width of the slot is defined as the length direction of the slot. Then the length of the first slot is greater than the length of the second slot, and the width of the first slot is less than the width of the second slot.

6. The socket as described in claim 5, characterized in that... On both sides of the second slot length direction, there are also bosses (22), and the mounting groove II (23) is set on the bosses; after the optical waveguide board and the printed circuit board are stacked and assembled in place, the two bosses (22) are just inserted into the first slot, and the upper surface of the bosses is flush with the upper surface of the optical waveguide board, and the waveguide port is suspended.

7. The socket as described in claim 5, characterized in that... The first slotted waveguide port (15) is also provided with positioning slots I (24) on both sides. When the second mating end of the socket is connected to the optical waveguide printed circuit board, the two positioning steps at the end of the mounting slot I are respectively inserted into the positioning slot I, so that the second mating end of the optical fiber contact is connected to the waveguide port, and the mating surface of the second mating end and the waveguide port is also coated with optical adhesive.

8. An optical waveguide connector, comprising a plug and a socket, characterized in that... The socket is the socket as described in any one of claims 1-7, and the plug is an MPO plug.

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