Low-loss non-contact beam expanding optical fiber connector

Abstract

The utility model relates to a low-loss non-contact beam-expanding optical fiber connector, which is characterized by comprising a circular plug, a circular socket and a beam-expanding optical fiber contact element, the plug comprises a first ceramic sleeve, a plug shell, a first pressing plate, a sealing gasket, a first screw, a connecting ring, a clamping spring, a first tail accessory, a socket shell, a second pressing plate, a second screw, a second tail accessory, a tail handle, a ceramic insertion core, a second ceramic sleeve and a lens. The beam expanding optical fiber contact element is arranged in the plug shell through a first ceramic sleeve, a first pressing plate and a first screw, and is arranged in the socket shell through a second pressing plate and a second screw; after the plug and the socket are connected, the beam expanding optical fiber contact pieces in the plug and the socket are in non-contact butt joint through the first ceramic sleeve, and a gap exists between the end faces of the two beam expanding optical fiber contact pieces. And the beam expanding optical fiber contact element can be arranged in the plug shell and the socket shell after core adjustment, so that the insertion loss of an optical link in the connection of the plug and the socket is reduced.

Description

Technical Field

[0001] The utility model relates to a low-loss non-contact beam-expanding fiber optic connector. Background Art

[0002] In recent years, with the continuous development and application of fiber optic connector technology, the application of beam-expanding fiber optic connectors has been increasingly widely used. A non-contact beam-expanding fiber optic connector disclosed in a Chinese invention patent with the authorization announcement number CN117666040A ensures the coupling efficiency of the contact by a high-precision mounting plate and guide pins, but has the disadvantages of complex structure, high requirement for the machining precision of parts, and large insertion loss of the optical link during the connection process; a Chinese invention patent with the authorization announcement number CN 109425940A has the disadvantages of complex structure and large insertion loss of the optical link during the connection process. Summary of the Invention

[0003] In order to solve the disadvantages of the existing non-contact beam-expanding fiber optic connector such as complex structure and large insertion loss of the optical link during the connection process, the utility model provides a low-loss non-contact beam-expanding fiber optic connector.

[0004] The technical solution adopted by the utility model is as follows: The plug and socket adopt the same kind of beam-expanding contact, and the contact is directly installed in the plug housing and the socket housing through a pressure plate, reducing the types of parts and simplifying the product structure; the tail handle of the beam-expanding contact adopts a regular polygon stepped structure, and the plug housing, the socket housing and the installation and cooperation part of the contact also adopt a regular polygon stepped hole structure. Before installing the contact, the radial offset of the light spot during the insertion process can be reduced by the method of centering adjustment, thereby reducing the insertion loss of the optical link during the connection process.

[0005] The low-loss non-contact beam-expanding fiber optic connector includes a plug, a socket, a beam-expanding fiber optic contact, a first ceramic sleeve, a plug housing, a first pressure plate, a sealing gasket, a first screw, a connection ring, a snap ring, a first tail accessory, a socket housing, a second pressure plate, a second screw, a second tail accessory, a tail handle, a ceramic ferrule, a second ceramic sleeve, and a lens; the beam-expanding fiber optic contact is installed in the plug housing through the first ceramic sleeve, the first pressure plate and the first screw, and the beam-expanding fiber optic contact is installed in the socket housing through the second pressure plate and the second screw; after the plug and the socket are connected through the connection ring, the beam-expanding fiber optic contacts in the plug and the socket are in non-contact butt joint through the first ceramic sleeve, and there is a gap between the end faces of the two beam-expanding fiber optic contacts.

[0006] Further, it is characterized in that: the beam-expanding fiber optic contact is composed of a tail handle, a ceramic ferrule, a second ceramic sleeve, and a lens; the outer shape of the tail handle is a regular polygon stepped structure; the lens is a columnar self-focusing lens or a columnar C lens, and the end face of the lens is a plane or a spherical surface or an aspherical surface.

[0007] Further, it is characterized in that: the plug includes a first ceramic sleeve, a plug housing, a first pressing plate, a sealing gasket, a first screw, a connecting ring, a snap ring, and a first tail accessory. The plug housing is provided with a plurality of first regular polygon stepped holes that cooperate with the beam expanding fiber optic contact members, and positioning keys are distributed outside the plug housing.

[0008] Further, it is characterized in that: the socket includes a socket housing, a second pressing plate, a second screw, and a second tail accessory. The socket housing is provided with a plurality of second regular polygon stepped holes that cooperate with the beam expanding fiber optic contact members, and positioning key grooves are distributed in the inner cavity of the socket housing.

[0009] Preferably, the regular polygon structures in the tail handle, the plug housing, and the socket housing can be an equilateral triangle, a square, a regular pentagon, a regular hexagon, etc., and the edges can be rounded structures.

[0010] Preferably, one or more beam expanding fiber optic contact members are accommodated in the plug housing and the socket housing.

[0011] Preferably, the combination of the positioning key / key groove of the plug housing and the socket housing can be a single key / key groove, a two-key / key groove, a three-key / key groove, a four-key / key groove, a five-key / key groove, etc.

[0012] The beneficial effects of the present utility model are: 1. The insertion loss of the optical link is low during the connection process; 2. The structure is simple and the installation is convenient; 3. The service life is long. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the low-loss non-contact beam expanding fiber optic connector of the present utility model

[0014] Figure 2 is a schematic structural diagram of the plug of the present utility model

[0015] Figure 3 is a schematic structural diagram of the socket of the present utility model

[0016] Figure 4 is a schematic structural diagram of the beam expanding fiber optic contact member of the present utility model

[0017] Figure 5 is a schematic structural diagram of the tail handle of the present utility model

[0018] Figure 6 , Figure 7 is a schematic structural diagram of the plug housing of the present utility model

[0019] Figure 8 , Figure 9 is a schematic structural diagram of the socket housing of the present utility model

[0020] In the figure, 1. plug, 2. socket, 3. beam-expanding optical fiber contact, 11. first ceramic sleeve, 12. plug housing, 13. first pressing plate, 14. sealing gasket, 15. first screw, 16. connecting ring, 17. circlip, 18. first tail accessory, 21. socket housing, 22. second pressing plate, 23. second screw, 24. second tail accessory, 31. tail handle, 32. ceramic ferrule, 33. second ceramic sleeve, 34. lens, 121. first regular polygon stepped hole, 122. guiding key, 211. second regular polygon stepped hole, 212. guiding key groove, 311. regular polygon stepped structure, 341. lens end face. Detailed implementation mode

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] The beam-expanding optical fiber contact (3) is as Figure 4 shown. The ceramic ferrule (32) is inserted into the tail handle (31), and the optical fiber is inserted from the end of the tail handle; after the lens (34) is inserted into the second ceramic sleeve (33) through epoxy glue and cured, it is assembled with the ceramic ferrule (32) together and cured with epoxy glue; the minimum eccentricity position of the light spot is confirmed by an alignment instrument, and a mark is made on the surface of the regular polygon stepped structure (311) of the tail handle (31) corresponding to the minimum eccentricity position.

[0023] The plug (1) is as Figure 2 shown. The first ceramic sleeve (11) and the beam-expanding optical fiber contact (3) are inserted into the plug housing (12), and are fixed in the cavity of the plug housing (12) through the first pressing plate (13) and the first screw (15). The surface mark of the minimum eccentricity position of the regular polygon stepped structure (311) of the tail handle (31) of the beam-expanding optical fiber contact (3) is kept consistent with the direction of the main positioning key of the plug housing (12); the connecting ring (16) is fixed to the plug housing (12) through the circlip (17); the sealing gasket (14) is inserted into the plug housing (12); the first tail accessory (18) is connected to the plug housing (12) through threads.

[0024] The socket (2) is as Figure 3As shown, the beam expanding optical fiber contact (3) is inserted into the socket housing (21) and fixed in the cavity of the socket housing (21) by the second pressing plate (22) and the second screw (23). The surface mark of the minimum eccentricity position of the regular polygon step structure (311) on the tail handle (31) of the beam expanding optical fiber contact (3) is aligned with the direction of the main positioning keyway of the socket housing (21); the second tail accessory (24) is threadedly connected to the socket housing (21).

Claims

1. A low-loss non-contact beam-expanding fiber optic connector, characterized by including a plug, a socket, a beam-expanding fiber optic contact member, a first ceramic sleeve, a plug housing, a first pressing plate, a sealing gasket, a first screw, a connecting ring, a snap ring, a first tail accessory, a socket housing, a second pressing plate, a second screw, a second tail accessory, a tail handle, a ceramic ferrule, a second ceramic sleeve, and a lens; the beam-expanding fiber optic contact member is installed in the plug housing through the first ceramic sleeve, the first pressing plate, and the first screw, and the beam-expanding fiber optic contact member is installed in the socket housing through the second pressing plate and the second screw; the plug and the socket are positioned by a key and a keyway, and after being connected by the connecting ring, the beam-expanding fiber optic contact members in the plug and the socket are in non-contact butt joint through the first ceramic sleeve, and there is a gap between the end faces of the two beam-expanding fiber optic contact members.

2. The low-loss non-contact beam-expanding fiber optic connector according to claim 1, characterized in that The beam-expanding fiber optic contact member is composed of a tail handle, a ceramic ferrule, a second ceramic sleeve, and a lens; the outer shape of the tail handle is a regular polygon stepped structure; the lens is a columnar self-focusing lens or a columnar C lens, and the end face of the lens is a plane or a spherical surface or an aspherical surface.

3. The low-loss non-contact beam-expanding fiber optic connector according to claim 1, characterized in that The plug includes a first ceramic sleeve, a plug housing, a first pressing plate, a sealing gasket, a first screw, a connecting ring, a snap ring, and a first tail accessory. There are multiple regular polygon stepped holes on the plug housing that cooperate with the beam-expanding fiber optic contact member, and positioning keys are distributed outside the plug housing.

4. The low-loss non-contact beam-expanding fiber optic connector according to claim 1, wherein The socket includes a socket housing, a second pressing plate, a second screw, and a second tail accessory. There are multiple regular polygon stepped holes on the socket housing that cooperate with the beam-expanding fiber optic contact member, and positioning key grooves are distributed in the inner cavity of the socket housing.

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