The present disclosure relates to the field of apparatuses for the installation of optical access networks. In particular, the present disclosure relates to a fiber splice closure for a fiber optic network and, more particularly, to an inline fiber splice closure in which an optical fiber from a bundle of optical fibers in a distribution cable is connected with at least one drop cable of an optical access network.
As demand for data and connectivity increases, network planners and installers are seeking more efficient and cost-effective deployment options for their fiber to the X (FTTX) rollouts. FTTX comprises the many variants of fiber optic access infrastructure. These include fiber to the home (FTTH), fiber to the premise (FTTP), fiber to the building (FTTB), fiber to the node (FTTN), and fiber to the curb or cabinet (FTTC). The optical FTTP or FTTH network is an optical access network that supplies broadband or ultra-broadband communication services to a number of end users (e.g., services that require data transmission speeds measuring several hundred Mbit/s or even higher). Some network systems, referred to as hybrid fiber-coaxial (HFC) networks, combine optical fiber and coaxial cable.
Conventional fiber aerial closures are designed to enable service providers to cost-effectively deploy aerial fiber networks in the access network (FTTN, HFC, FTTP, etc.). Some conventional fiber splice closures provide environmental protection for the splicing, management and storage of fiber for aerial, direct-buried and below-grade applications. These closure systems allow for installation, maintenance, and management from central office to the customer's premises for Outside Plant (OSP), passive networks.
A distribution cable can be connected optically to one or more drop cables. As used herein, a “drop cable” is an optical fiber cable that typically runs towards an apartment or office of an end user within a special duct fixed to the surface of the wall or housed within the thickness thereof. To connect the distribution cable to a drop cable, an optical fiber is pulled out of the distribution cable/duct and spliced to an end of an optical fiber of the drop cable.
Conventional fiber splice closures are designed for flat drop cables and figure-of-eight distribution cables. Therefore, it may be desirable to provide a fiber splice closure that is configured to accommodate round drop cables and/or to accommodate various distribution cables having different configurations. It may be desirable to provide a fiber splice closure that is configured to accommodate PPC's Miniflex™ drop cables, including but not limited to PPC's preconnectorized QuikDrop™ cable.
According to various aspects of the present disclosure, an optical fiber connection closure for housing an optical fiber connection between a distribution cable and at least one drop cable of an optical access network includes a base with an interior. The base includes a round port configured to receive a distribution cable into the interior. The round port is configured to form a seal around the distribution cable, and may be comprised of a flexible material. The base also includes a versatile clamp configured for securing the distribution cable to the base. The size of the versatile clamp can be designed to provide a size of the opening to accommodate various desired size distribution cables. The base also includes drop cable ports configured to receive at least one drop cable containing a first optical fiber. The drop cable ports may have a round shape. Screw holes are arranged in a radial side wall of the drop cable ports that allow for mechanical retention of the drop cable by insertion of a fixing device that grips an outer jacket of the drop cable. The base may include grooved portions for securing fibers from the drop cables.
The optical fiber connection closure may further include an insert that includes first and second wrap guides configured to house an excess length of the first optical fiber of the drop cable. The insert further includes a center section for housing a splitter module, such that the first section and the second section are disposed on opposite sides of the center section. A plurality of splice protector holder elements extend from the top of the center section and are configured to house at least one splice protector. The center section includes an LC bulkhead for securing an LC adaptor to the center section, and fiber clips for storing excess second optical fiber from the distribution cable on a top surface of the center section. The LC adaptor receives the second optical fiber from the distribution cable. An LC connector module is mounted to at least one side face of the center section. The LC connector module connects the first optical fiber with the splitter module, which in turn is connected to the LC adaptor, thereby providing an optical connection between the distribution cable and the drop cable.
The foregoing illustrative summary, as well as other exemplary objectives and/or advantages of the invention, and the manner in which the same are accomplished, are further explained within the following detailed description and its accompanying drawings
For a further understanding of the disclosure, reference will be made to the following detailed description of the invention which is to be read in connection with the accompanying drawing and in which like numbers refer to like parts, wherein:
As a preface to the detailed description, it should be noted that, as used in this specification and the appended claims, the singular forms “a,” “an,” and “the” include plural referents, unless the context clearly dictates otherwise.
As shown in
The distribution cable 120 may be securely coupled with the base 100 by one or more cable clamps 130. As shown in
In some aspects, an inner surface 131 of the middle portion 138 may include one or more gripping members 137 that project into the opening 132 to assist with securing the cable 120 to the base 100. For example, the one or more gripping members 137 may include a ridge that extends from the inner surface 131 into the opening 132. The ridge may extend along a portion of the inner surface of the U-shaped middle portion 138 or about the entire inner periphery of the U-shaped middle portion 138 from the end adjacent one flange 136 to the end adjacent the other flange 136. In some aspects, the gripping members 137 may be configured as spherical-shaped protrusions. In some aspects, the inner surface 131 of the middle portion 138 may include gripping members 137 that are spaced apart in an axial direction in which the distribution cable 120 passes through the opening 132. In some aspects, the one or more gripping members 137 may be configured to be received in one or more grooves of a grooved duct or a grooved cable.
Referring again to
As shown in
As best illustrated in
The closure 10 includes a panel 200 attached to the base 100. In some aspects, the panel 200 may be removably coupled with the base 100 by any conventional coupling mechanism.
As best shown in
The raised deck 300 may include a bulkhead 320, which may be a portion that is integrally molded with the raised deck 300. In some aspects, the bulkhead 320 may be a separate structure that is coupled with the raised deck 300 by any conventional mechanism. The raised deck 300 may includes holders 330 arranged to hold fusion splice protectors 332. For example, in some aspects, the holders 300 may include pegs 342 extending from a top surface 344 of the raised deck 300. Each of the holders 300 may include two pair of pegs 342 that are structure and arranged to receive and hold a plurality of fusion splice protectors 332 there between. As illustrated, the raised deck 300 may includes two pair of pegs 342 on each side of the bulkhead 320 to double the storage capacity of fusion splice protectors 332. The top surface 344 of the raised deck 300 may also include a plurality of clips 340 configured to store slack fiber optic cable from the distribution cable 120 that is being connected to the splitter 390, as discussed in more detail below.
As shown in
In an embodiment having a 1×8 splitter 390, each of the four LC adapters 360 is coupled with the splitter 190 to complete the connection between the spliced fiber of the distribution cable 120 and the fiber optic cables 156 of eight drop cables 152. In an embodiment having two 1×4 splitters, each of the four LC adapters 360 is coupled with a respective splitter 190 to complete the connection between two spliced fibers of the distribution cable 120 and the fiber optic cables 156 of eight drop cables 152.
Referring to
The first and second wrap guides 212, 222 are arranged to direct the slack fiber optic cable 156 to follow an arcuate path that is greater than or equal to a minimum bend radius of the fiber optic cable 156. The bend radius of the arcuate paths in the storage regions 210, 220 of the respective wrap guides 212, 222 are generally greater than the minimum permissible bend radius of the fiber optic cable 156 in order to prevent signal losses. For example, as the bend radius of an optical fiber or filament decreases below the minimum permissible bend radius, the incident light energy is not fully reflected internally of the optic filament and, thus, light energy is refracted out of the filament causing a portion of the light energy to be absorbed or lost.
Referring to
Also, it should be appreciated that one or more of the fiber optic cables of the distribution cable 120 may be connected to one or more of the drop cables 152 in any known manner. For example, in some aspects, a fiber optic cable of the distribution cable 120 may be connected to a drop cable 152 by direct splicing. In some aspects, a fiber optic cable of the distribution cable 120 may be spliced to a pigtail, which in turn is connected to a coupler configured to connect the pigtail directly to a drop cable 152.
Although
In use, the upper and lower portions 113, 114 of the grommets 110 are separated from one another and placed around the distribution cable 120 such the distribution cable 120 is disposed in the opening 112. The grommets 110 are placed into the recesses 105 at the first and second ends 102, 104 of the base 100. At least one cable clamp 130 is secured to the base 100 to secure the distribution cable 120 to the base 100. Further, one of the fiber optic cables from the distribution cable is removed from the distribution cable 120, as would be understood by persons skilled in the art. For example, a window is cut from the distribution cable by rotary cutting each end of the window and slitting the cable between each rotary cut. The outer jacket of the distribution cable is peeled off and a fiber is selected and cut. The cut fiber is then spliced to a first end of a pigtail cable having an LC connector at a second opposite end for connection with one of the LC connection ports on the LC adaptor 350. The splice between the fiber removed from the distribution cable 120 and the pigtail may be protected with splice protectors 332. The spliced protectors 332 may be a shrink wrap that surrounds the fiber splice to maintain the integrity of the splice and prevent damage to the splice.
Additional embodiments include any one of the embodiments described above, where one or more of its components, functionalities or structures is interchanged with, replaced by or augmented by one or more of the components, functionalities or structures of a different embodiment described above. For example, although the disclosed embodiment is described with LC connectors and adapters, other fiber optic adapters, including but not limited to SC connector and adapters, are contemplated by the disclosure.
It should be understood that various changes and modifications to the embodiments described herein will be apparent to those skilled in the art. Such changes and modifications can be made without departing from the spirit and scope of the present disclosure and without diminishing its intended advantages. It is therefore intended that such changes and modifications be covered by the appended claims.
Although several embodiments of the disclosure have been disclosed in the foregoing specification, it is understood by those skilled in the art that many modifications and other embodiments of the disclosure will come to mind to which the disclosure pertains, having the benefit of the teaching presented in the foregoing description and associated drawings. It is thus understood that the disclosure is not limited to the specific embodiments disclosed herein above, and that many modifications and other embodiments are intended to be included within the scope of the appended claims. Moreover, although specific terms are employed herein, as well as in the claims which follow, they are used only in a generic and descriptive sense, and not for the purposes of limiting the present disclosure, nor the claims which follow.
This application is a continuation of U.S. application Ser. No. 17/701,392 filed Mar. 22, 2022, pending, which is a continuation of U.S. application Ser. No. 16/411,126 filed May 13, 2019, now U.S. Pat. No. 11,280,976, which claims the benefit of U.S. Provisional Application No. 62/670,622, filed May 11, 2018, expired. The disclosure of the prior applications is hereby incorporated by reference herein in its entirety.
Number | Date | Country | |
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62670622 | May 2018 | US |
Number | Date | Country | |
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Parent | 17701392 | Mar 2022 | US |
Child | 18209300 | US | |
Parent | 16411126 | May 2019 | US |
Child | 17701392 | US |