Bending-resistant hybrid structure optical splitter

Abstract

The utility model relates to a communication technology, in particular to an anti-bending mixed structure optical branching device, which comprises a fused biconical taper branching device and an optical waveguide branching structure, and the optical waveguide branching structure comprises an anti-bending optical fiber. The fused biconical taper splitter can separate any unequal splitting ratio signals, the part with the smaller proportion is used as a monitoring signal, and the part with the larger proportion is used as a main signal; one end of the bending-resistant optical fiber is conducted with a main signal port of the fused biconical taper splitter, and the other end of the bending-resistant optical fiber is conducted with a public port of the optical waveguide splitter, so that an intercommunication link is formed, and multiple paths of main signals with the equal splitting ratio are output. According to the hybrid optical branching device integrating the fused biconical taper branching device and the optical waveguide branching device, optical signals are evenly divided, signals with small proportions are separated out to serve as monitoring signals, and the input and output same-side installation function is achieved at the same time. The ultra-small bending-resistant optical fiber performance is effectively utilized, the fused biconical taper splitter and the optical waveguide splitter are integrated, and integration and miniaturization of products are achieved.

Description

Technical Field

[0001] The utility model relates to a communication technology, in particular to an anti-bending hybrid structure optical splitter. Background Art

[0002] With the expansion of network services, people's demand for bandwidth will continue to grow. Since 2004, FTTH has gained development opportunities driven by bandwidth demand. In the "last mile" solution for end users, FTTH is considered to be the best solution, which can fully integrate almost all access services such as traditional voice, data, CATV, high-definition IPTV, etc. As an important component of FTTH, optical splitters have also achieved unprecedented rapid development.

[0003] The main function of an optical splitter is to split an input optical signal into multiple output optical signals at a certain splitting ratio. According to the different manufacturing processes of the optical splitter, the optical splitter can be divided into a fused-bent-taper (FBT) optical splitter and a planar waveguide (PLC) optical splitter.

[0004] Among them, the planar optical waveguide optical splitter is a quartz substrate integrated waveguide optical power distribution device, which can evenly divide the energy of a beam of light into several equal parts and integrate optical components with different functions into one chip. It has the characteristics of small size, wide working wavelength range, high reliability, good light splitting uniformity, etc. It is particularly suitable for connecting the central office and terminal equipment in passive optical networks (EPON, BPON, GPON, etc.) and realizing the splitting of optical signals.

[0005] The fused taper splitter is a passive device that combines two (or more) optical fibers with their coating removed in a certain way, melts them at high temperature, and stretches them to both sides at the same time, eventually forming a special waveguide structure in the form of a double cone in the heating area to achieve transmission optical power coupling.

[0006] At present, with the changes in market demand, the demands of different customer groups for splitters have also changed. The functions are more demanding and the structures are more compact. The above two devices cannot fully meet customer needs. Utility Model Content

[0007] The purpose of the utility model is to provide a bending-resistant hybrid structure optical splitter to solve the problems raised in the above background technology.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A bending-resistant hybrid structure optical splitter, comprising a fused taper splitter and an optical waveguide splitting structure, wherein the optical waveguide splitting structure has the function of a traditional optical waveguide splitter, and the fused taper splitter is a conventional optical splitter, used to separate any unequal splitting ratio signals; accordingly, the fused taper splitter has at least two signal ports, wherein the unequal splitting ratio signals separated by the fused taper splitter are outputted via each signal port;

[0010] The signal port includes a main signal port and a secondary signal port. The unequal splitting ratio signal separated by the fused taper splitter, the part of the unequal splitting ratio signal with a smaller signal strength ratio is output from the secondary signal port and directly connected to the monitoring terminal as a monitoring signal;

[0011] The part with a larger proportion of signal strength in the unequal split ratio signal is output from the main signal port;

[0012] The optical waveguide branching structure includes at least one section of bend-resistant optical fiber, and one end of the bend-resistant optical fiber is connected to the main signal port of the fused-taper splitter.

[0013] The anti-bending hybrid structure optical splitter as described above: the other end of the anti-bending optical fiber is connected to the single-core optical fiber, and the single-core optical fiber is connected to the multi-core optical fiber array through a waveguide chip to form an intercommunication link, and construct an optical waveguide branching structure for outputting multiple equal splitting ratio main signals.

[0014] The anti-bending hybrid structure optical splitter as described above: the multi-core optical fiber array is connected to the application terminal via an output optical cable, and the output optical cable adopts a pigtail structure.

[0015] The anti-bending hybrid structure optical splitter as described above: the multi-core optical fiber array is connected to the equally divided output ends, and the equally divided output ends are connected to the output optical cables.

[0016] The bending-resistant hybrid structure optical splitter as described above: the bending-resistant optical fiber, single-core optical fiber, waveguide chip, and multi-core optical fiber array in the fused-taper splitter and the optical waveguide branching structure are all fixedly arranged in an outer sealing steel tube.

[0017] The anti-bending hybrid structure optical splitter as described above: a rubber plug is sealed and fixedly provided at each end of the outer sealed steel tube, and the fused taper splitter and the optical waveguide branching structure are encapsulated in the outer sealed steel tube through the rubber plugs at both ends.

[0018] The anti-bending hybrid structure optical splitter as described above: the two ends of the optical fiber in the fused taper splitter are sealed and pass through the rubber plugs at both ends, and the output optical cable is sealed and passed through the rubber plug on one side into the outer sealing steel tube and connected to the equally divided output ends.

[0019] Compared with the prior art, the beneficial effects of the utility model are: a hybrid optical splitter integrating a fused taper splitter and an optical waveguide splitter can achieve uniform division of optical signals while separating a smaller proportion of signals as monitoring signals, and at the same time realize the function of installing input and output on the same side.

[0020] As a conventional optical splitter, the fused taper splitter can separate signals of any unequal splitting ratio. The smaller portion is directly connected to the monitoring end as a monitoring signal, and the larger portion is conducted to the bend-resistant optical fiber as the main signal. On this basis, the performance of the extremely small bend-resistant optical fiber is effectively utilized to achieve product integration and miniaturization. Moreover, the integrated and miniaturized structural modules have greater advantages in actual application scenarios, reducing the internal physical space of the module and adapting to the development trend of the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the structure of the bending-resistant hybrid structured optical splitter.

[0022] In the figure: 110-fused taper splitter; 120-bend-resistant optical fiber; 130-single-core optical fiber; 140-waveguide chip; 150-multi-core optical fiber array; 160-outer sealing steel tube; 170-rubber plug. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0025] See also Figure 1As an embodiment of the utility model, the anti-bending hybrid structure optical splitter includes a fused taper splitter 110 and an optical waveguide splitting structure, wherein the optical waveguide splitting structure has the function of a traditional optical waveguide splitter, and the fused taper splitter 110 is a conventional optical splitter, which is used to separate any unequal splitting ratio signals; accordingly, the fused taper splitter 110 has at least two signal ports, wherein the unequal splitting ratio signals separated by the fused taper splitter 110 are output through each signal port;

[0026] The signal port includes a main signal port and a secondary signal port. The unequal splitting ratio signal separated by the fused taper splitter 110, the part with a smaller signal strength in the unequal splitting ratio signal is outputted from the secondary signal port and directly connected to the monitoring terminal as a monitoring signal.

[0027] The part with a larger proportion of signal strength in the unequal split ratio signal is output from the main signal port;

[0028] The optical waveguide branching structure includes at least one section of bend-resistant optical fiber 120 , and one end of the bend-resistant optical fiber 120 is connected to the main signal port of the fused-taper splitter 110 .

[0029] In this embodiment, the fused taper splitter 110 is used as a conventional optical splitter, and a smaller portion of the unequal split ratio signal is separated as a monitoring signal directly output to the monitoring end, while a larger portion of the unequal split ratio signal is separated as a main signal and introduced into the optical waveguide branching structure; on this basis, the performance of the extremely small bend-resistant optical fiber 120 is effectively utilized, and the fused taper splitter 110 and the optical waveguide splitter are integrated to achieve product integration and miniaturization; and the integrated and miniaturized structural module has greater advantages in actual application scenarios, reduces the internal physical space of the module, and adapts to the development trend of the industry.

[0030] In terms of the connection between the fused taper splitter and the optical waveguide splitter, the conventional fusion heat shrink protection process is abandoned and a direct connection process is adopted, which effectively reduces the space occupied by the heat shrink tube.

[0031] As a further solution of the utility model, the other end of the bend-resistant optical fiber 120 is connected to the single-core optical fiber 130, and the single-core optical fiber 130 is connected to the multi-core optical fiber array 150 through the waveguide chip 140 to form an intercommunication link and construct a complete optical waveguide branching structure for outputting multiple equal-splitting ratio main signals.

[0032] It should be noted that the bend-resistant optical fiber 120 in the present invention can be customized according to demand to make its splitting ratio diversified; such as 1%, 2%, 3%, 5%, 10%, etc., depending on the specific demand.

[0033] As a further solution of the present invention, the multi-core optical fiber array 150 is connected to the application terminal via an output optical cable, and the output optical cable adopts a pigtail structure, such as a 250um / 900um pigtail.

[0034] The bending-resistant hybrid structure optical splitter in the utility model includes an optical waveguide branching structure formed by a bending-resistant optical fiber 120, a single-core optical fiber 130, a waveguide chip 140, and a multi-core optical fiber array 150, and a fused-taper splitter 110, wherein the main signal is exported via an output optical cable through the optical waveguide branching structure.

[0035] As a further solution of the present invention, the multi-core optical fiber array 150 is connected to equally divided output ends, and the equally divided output ends are connected to output optical cables.

[0036] The multi-core optical fiber array 150 can output multiple signals in equal parts, and the number of equal output ports can also be customized, such as 2 / 4 / 8 / 16 equal output ports.

[0037] As a further solution of the utility model, the fused taper splitter 110 and the bending-resistant optical fiber 120 , the single-core optical fiber 130 , the waveguide chip 140 , and the multi-core optical fiber array 150 in the optical waveguide branch structure are all fixedly disposed in the outer sealing steel tube 160 .

[0038] In this embodiment, under the premise of adding additional functions, the original steel tube packaging method is used, so that the size of the compact outer sealing steel tube does not increase; in addition, in order to ensure that the product performance is not reduced, the passive components are connected to each other under the condition that the width of the outer sealing steel tube 160 is less than 7 mm, and the bending-resistant optical fiber 120 uses the best-performing small bending radius optical fiber G657.B3; due to the special nature of G657.B3 optical fiber, a special secondary processing process is used to draw the fused-pull cone coupler splitter.

[0039] As a further solution of the utility model, a rubber plug 170 is sealed and fixedly provided at both ends of the outer sealing steel tube 160, and the fused taper splitter 110 and the optical waveguide branching structure are encapsulated in the outer sealing steel tube 160 through the rubber plugs 170 at both ends.

[0040] The use of rubber plug 170 for packaging can prevent light spillage on the one hand, and is also very helpful in terms of waterproofing and dustproofing on the other hand.

[0041] As a further solution of the utility model, both ends of the optical fiber in the fused taper splitter 110 are sealed and pass through the rubber plugs 170 at both ends, and the output optical cable is sealed and passed through the outer sealing steel tube 160 from the rubber plug 17 on one side and is connected to the equally divided output ends.

[0042] Due to the presence of the rubber plug 170, the two ends of the optical fiber of the fused taper splitter 110 are sealed and fixed into the device, and only the output optical cable enters the device, thereby ensuring the integrity and sealing of the entire device.

[0043] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A bending-resistant hybrid structure optical splitter, comprising a fused taper splitter (110) and an optical waveguide branching structure, wherein the fused taper splitter (110) is an optical splitter used to separate signals of any unequal splitting ratio; the fused taper splitter (110) has at least two signal ports, wherein: The unequal splitting ratio signals separated by the fused taper splitter (110) are output via each signal port; The invention is characterized in that the signal port comprises a main signal port and a sub-signal port, and the unequal splitting ratio signal separated by the fused taper splitter (110) has a portion of the unequal splitting ratio signal with a smaller signal strength ratio outputted from the sub-signal port and directly connected to the monitoring terminal as a monitoring signal; The part with a larger proportion of signal strength in the unequal split ratio signal is output from the main signal port; The optical waveguide branching structure comprises at least one section of bend-resistant optical fiber (120), and one end of the bend-resistant optical fiber (120) is connected to the main signal port of the fused taper splitter (110).

2. The bending-resistant hybrid structure optical splitter according to claim 1, characterized in that: The other end of the bend-resistant optical fiber (120) is connected to a single-core optical fiber (130), and the single-core optical fiber (130) is connected to a multi-core optical fiber array (150) via a waveguide chip (140) to form an intercommunication link and construct an optical waveguide branching structure for outputting multi-path equal splitting ratio main signals.

3. The bending-resistant hybrid structure optical splitter according to claim 2, characterized in that: The multi-core optical fiber array (150) is connected to the application terminal via an output optical cable, and the output optical cable adopts a pigtail structure.

4. The bending-resistant hybrid structure optical splitter according to claim 3, characterized in that: The multi-core optical fiber array (150) is connected to equally divided output ends, and the equally divided output ends are connected to output optical cables.

5. The bending-resistant hybrid structure optical splitter according to any one of claims 3 to 4, characterized in that: The fused taper splitter (110) and the bending-resistant optical fiber (120), the single-core optical fiber (130), the waveguide chip (140), and the multi-core optical fiber array (150) in the optical waveguide splitting structure are all fixedly arranged in an outer sealing steel tube (160).

6. The bending-resistant hybrid structure optical splitter according to claim 5, characterized in that: A rubber plug (170) is sealed and fixedly disposed at each end of the outer sealing steel tube (160), and the fused taper splitter (110) and the optical waveguide branching structure are packaged in the outer sealing steel tube (160) through the rubber plugs (170) at the two ends.

7. The bending-resistant hybrid structure optical splitter according to claim 6, characterized in that: The two ends of the optical fiber in the fused taper splitter (110) are sealed and pass through the rubber plugs (170) at the two ends respectively, and the output optical cable is sealed and passes through the rubber plug (170) on one side into the outer sealing steel tube (160) and is connected to the equally divided output ends.

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