CN113866890A - Power-resistant FC optical fiber connector - Google Patents
Power-resistant FC optical fiber connector Download PDFInfo
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- CN113866890A CN113866890A CN202111338877.8A CN202111338877A CN113866890A CN 113866890 A CN113866890 A CN 113866890A CN 202111338877 A CN202111338877 A CN 202111338877A CN 113866890 A CN113866890 A CN 113866890A
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- optical fiber
- beam expanding
- power
- lens
- plug
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 59
- 239000000919 ceramic Substances 0.000 claims abstract description 22
- 238000003780 insertion Methods 0.000 claims abstract description 21
- 230000037431 insertion Effects 0.000 claims abstract description 21
- 230000003287 optical effect Effects 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 11
- 239000000835 fiber Substances 0.000 claims description 14
- 239000003292 glue Substances 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000007888 film coating Substances 0.000 description 2
- 238000009501 film coating Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2551—Splicing of light guides, e.g. by fusion or bonding using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses a power-resistant FC optical fiber connector, which comprises a plug, a socket and an opening ceramic sleeve, wherein a beam expanding assembly is arranged on the plug and the socket, the opening ceramic sleeve is arranged at the front part of the beam expanding assembly, and the end surface of the beam expanding assembly is positioned at the central position of the opening ceramic sleeve; the beam expanding assembly comprises a lens, an end cap, an outer ferrule, an inner ferrule, a metal sleeve and an optical fiber; the inner inserting core is pressed into the metal sleeve, the end cap is welded at the front end of the optical fiber, and the optical fiber welded with the end cap penetrates into the inner inserting core and is solidified; the front end of the inner insertion core is provided with a beam expanding lens, the size of the beam expanding lens is smaller than that of the inner insertion core, and a light spot optical axis after beam expanding is superposed with a physical axis of the insertion core; the outer sleeve of interior lock pin has outer lock pin, and lens cave in outer lock pin terminal surface. The invention improves the power resistance of the optical fiber, improves the power resistance of the butt joint end face, and overcomes the technical prejudice that the FC optical fiber connector can not transmit high-power light.
Description
Technical Field
The invention relates to the field of FC optical fiber connectors, in particular to a power-resistant FC optical fiber connector.
Background
The FC optical fiber connector is a product which conforms to the post department YD/T1272.4 and international standard IEC61754-13, is widely applied to the field of communication, optical fibers of the FC optical fiber connector are embedded in a high-precision pin cylinder with the nominal diameter of 2.5mm, optical centering of the connector is realized through an elastic sleeve, the power of the current FC optical connector used in the industry is not recommended to be larger than 0.1W, and the sealing improvement type is not recommended to be larger than 0.2W. If transmission power is too large, end face burnout faults are easy to occur in the butt joint process of the optical fiber connectors.
The FC connector is not applied to transmitting high-power light beams in the industry, and the problem is solved by reducing the optical power density of the end face of the optical fiber and the end face of the ceramic ferrule.
In 1996, a patent JPH09269433A filed by hitachi, japan ltd discloses a technical solution of enlarging the mode field diameter of the end to reduce the power density. The scheme adopts a core-expanding optical fiber scheme, expands the mode field diameter from 10 microns to 25 microns, and has limited power density reduction.
Another problem of the conventional lens beam expanding scheme is that when a high-power light beam is focused back to an optical fiber by a lens, the power density of the end face of the optical fiber is very high, any micro-damage, processing defects, glue residues and the like cause heating at the position, and the possibility of burning exists.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a power-resistant FC optical fiber connector, improves the power-resistant capability of optical fibers, and improves the power-resistant capability of butt joint end faces, and the FC optical fiber connector optimized and improved according to the invention can integrally resist single-mode transmission power of 5W, thereby overcoming the technical prejudice that the FC optical fiber connector can not carry out high-power (more than 0.2W) optical transmission.
The purpose of the invention is realized by the following scheme:
a power-tolerant FC optical fiber connector comprises a plug and a socket, wherein a beam expanding assembly is arranged on the plug and the socket.
Further, the optical fiber expanding device comprises an open ceramic sleeve, wherein the open ceramic sleeve is arranged at the front part of the expanding assembly, the end face of the expanding assembly is positioned at the central position of the open ceramic sleeve, and the open ceramic sleeve is used for playing a role of accurately aligning the expanding assembly in the plug and the socket.
Further, the beam expanding assembly comprises a lens, an end cap, an outer ferrule, an inner ferrule, a metal sleeve and an optical fiber; the inner inserting core is pressed into the metal sleeve, the end cap is welded at the front end of the optical fiber, and the optical fiber welded with the end cap penetrates into the inner inserting core and is solidified; the front end of the inner insertion core is provided with a beam expanding lens, the size of the beam expanding lens is smaller than that of the inner insertion core, and a light spot optical axis after beam expanding is superposed with a physical axis of the insertion core; the outer sleeve of interior lock pin has outer lock pin, and lens cave in outer lock pin terminal surface.
Further, the curing is performed by glue.
Further, the plug includes a plug housing in which the beam expanding assembly is mounted.
Further, the socket includes a socket housing in which the beam expanding assembly is mounted.
The beneficial effects of the invention include:
in the embodiment of the invention, the power resistance of the optical fiber is improved by welding the end cap structure at the tail end of the optical fiber, the power resistance of the butt joint end face can be greatly improved by adopting the beam expanding technology at the end face, the power resistance of the FC connector can be improved to 5W from 0.3W by optimizing and improving the whole FC optical fiber connector according to the scheme at present, and the technical bias that the FC optical fiber connector can not carry out high-power (more than 0.2W) optical transmission which is commonly considered by technical personnel is overcome.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a front view of a plug in an embodiment of the present invention;
FIG. 2 is a front view of a receptacle in an embodiment of the invention;
FIG. 3 is a front view of an expanded beam assembly in an embodiment of the present invention;
in the figure, 1, a plug housing; 2. an open ceramic sleeve; 3. a beam expanding assembly; 3-1, a lens; 3-2, end caps; 3-3, an outer ferrule; 3-4, an inner ferrule; 3-5, metal sleeve; 3-6, optical fiber; 3-7, glue; 4. a socket housing.
Detailed Description
All features disclosed in all embodiments in this specification, or all methods or process steps implicitly disclosed, may be combined and/or expanded, or substituted, in any way, except for mutually exclusive features and/or steps.
As shown in fig. 1, a power-tolerant FC fiber optic connector includes a plug and a receptacle, and a beam expanding element 3 is disposed on the plug and the receptacle.
In an alternative embodiment, it should be noted that the optical fiber connector comprises a split ceramic sleeve 2, the split ceramic sleeve 2 is arranged at the front part of the beam expansion assembly 3, the end face of the beam expansion assembly 3 is located at the center of the split ceramic sleeve 2, and the split ceramic sleeve 2 is used for precisely aligning the beam expansion assembly 3 in the plug and the socket.
In an alternative embodiment, it should be noted that the beam expander assembly 3 includes a lens 3-1, an end cap 3-2, an outer insert core 3-3, an inner insert core 3-4, a metal sleeve 3-5 and an optical fiber 3-6; the inner insertion core 3-4 is pressed into the metal sleeve 3-5, the end cap 3-2 is welded at the front end of the optical fiber 3-6, and the optical fiber welded with the end cap 3-2 penetrates into the inner insertion core 3-4 and is solidified; the front end of the inner insertion core 3-4 is provided with a beam expanding lens 3-1, the size of the beam expanding lens 3-1 is smaller than that of the inner insertion core 3-4, and a light spot optical axis after beam expansion is superposed with a physical axis of the insertion core; the outer part of the inner inserting core 3-4 is sleeved with an outer inserting core 3-3, and the lens 3-1 is sunken in the end face of the outer inserting core 3-2.
In an alternative embodiment, it should be noted that the curing is performed by using glue 3-7.
In an alternative embodiment, it should be noted that the plug includes a plug housing 1, and the beam expanding element 3 is mounted in the plug housing 1.
In an alternative embodiment, it should be noted that the socket includes a socket housing 4, and the beam expanding element 3 is mounted in the socket housing 4.
The working principle of the invention is as follows: the power-resistant FC optical fiber connector mainly comprises a lens, an end cap, an outer insertion core, an inner sleeve and an optical fiber cable, wherein two ends of the connector are aligned by adopting high-precision ceramic sleeves. The light spot is expanded by adopting a lens on a butt joint interface of the connector, the purpose of reducing power density is achieved, the end face of the optical fiber is welded with one section of the end cap, therefore, the light converged by the lens is still larger before entering the end cap, the diameter of the light spot is still larger, the burning caused by the micro defect of the processing of the end face of the optical fiber is avoided, a single-mode G657A2 optical fiber is taken as an example, the fiber core of the optical fiber is 9um and is calculated by combining Gaussian beam power density, when the output light spot of the optical fiber is transmitted by 0.5mm, the tolerance power is improved by nearly 20 times, the optical fiber after film coating is ground according to the conventional method, the tolerance power is 0.3W (industrial experience value), a section of 0.5mm quartz rod is welded on the end face of the optical fiber through the end cap, and the tolerance power can be improved to 6W. Meanwhile, the end cap and the optical fiber are welded, so that the loss at the position is extremely low, and the power resistance of an optical fiber interface is improved.
In order to reduce the loss of the butt joint end face to the maximum extent, the ceramic ultrahigh precision is used for ensuring, and the specific idea is that the connector is provided with an inner inserting core, the inner hole of the inner inserting core is matched with the outer diameter of an optical fiber, the communication industry develops to the present, the coaxiality of the optical fiber and the inner inserting core can be ensured to be in a micron level, the matching precision of the inner inserting core and the outer inserting core can also reach the micron level, and therefore, the position of the optical fiber is located in the center of a physical axis of the outer inserting core. The size of the lens is slightly smaller than that of the inner inserting core, so that fine adjustment can be performed in the inner hole space of the outer inserting core, and the expanded light spot optical central axis and the physical axis of the outer inserting core are coincided through adjustment of the coupling table. The outside utilizes the outer plug-in core of opening sleeve plug enclasping both ends, guarantees that the angular deflection of the outer plug-in core of both ends reaches the minimum.
The technical advantages of the invention are as follows: the connector adopts at fiber end face butt fusion end cap structure, carry out the pre-amplification to transmission light spot between optic fibre and lens, improve the power-resisting performance of fiber end face, reuse lens further enlarge the collimation with the light beam, the resistant single mode transmission power 5W of FC fiber connector has been realized, the technical bias that the FC fiber connector that has overcome the ordinary thinking of technical staff can not carry out high power (more than 0.2W) optical transmission, can adopt FC fiber connector butt joint structure to replace direct butt fusion or coupling to carry out 5W high-power optical transmission interconnection simultaneously, the flexibility is stronger.
In other embodiments of the present invention, the power tolerant FC fiber optic connector of the present invention comprises a plug, a receptacle. The plug comprises a plug shell 1 which plays roles of protecting, positioning and guiding the internal expansion beam combining piece, and is additionally provided with a necessary locking mechanism. The plug shell 1 is installed and is expanded and close 3, and the front portion that expands and close 3 is equipped with opening ceramic sleeve 2, and the terminal surface that expands and close 3 is located opening ceramic sleeve 2's central point and puts, and opening ceramic sleeve 2 plays the effect of expanding and closing 3 in accurate alignment plug and the socket. The socket mainly comprises a socket shell 4, and the socket shell 4 plays roles of protecting, positioning and guiding the internal beam expanding assembly 3.
The beam expanding assembly 3 comprises a lens 3-1, an end cap 3-2, an outer plug 3-3, an inner plug 3-4, a metal sleeve 3-5 and an optical fiber cable 3-6. The beam expanding assembly 3 is manufactured by the following method: pressing 3-4 of the inner core insert into 3-5 of the metal sleeve, welding a section of end cap 3-2 at the front end of 3-6 of the optical fiber, penetrating the welded optical fiber into the inner core insert, curing the optical fiber by 3-7 glue, grinding and polishing the end face of the cured inner core insert and the optical fiber, and carrying out film coating treatment after grinding in order to improve the light transmission efficiency of the position. The front end of the inner insertion core 3-4 is provided with a beam expanding lens 3-1, the size of the lens is slightly smaller than that of the inner insertion core, and the position and the angle of the lens are adjusted by using a high-precision coupling table, so that a light spot optical axis after beam expansion is coincided with the physical axis of the insertion core. The outer part of the inner inserting core 3-4 is sleeved with the outer inserting core 3-3, so that in order to avoid lens damage in the plugging and unplugging process, the lens 3-1 is sunken in the end face of the outer inserting core 3-2, and in the plugging and unplugging process, the structures of the optical path parts are not directly contacted.
By utilizing the high precision of the inserting core, the position of the lens does not need to be adjusted in the using process of the connector, the insertion loss can be guaranteed to be kept to a very small value, the whole connector mechanism is exquisite, and the inserting and pulling are convenient.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Other embodiments than the above examples may be devised by those skilled in the art based on the foregoing disclosure, or by adapting and using knowledge or techniques of the relevant art, and features of various embodiments may be interchanged or substituted and such modifications and variations that may be made by those skilled in the art without departing from the spirit and scope of the present invention are intended to be within the scope of the following claims.
Claims (6)
1. A power-tolerant FC optical fiber connector comprises a plug and a socket, and is characterized in that a beam expanding assembly (3) is arranged on the plug and the socket.
2. The power tolerant FC fiber optic connector of claim 1, comprising a split ceramic sleeve (2), the split ceramic sleeve (2) being disposed in front of the beam expanding assembly (3), the end face of the beam expanding assembly (3) being centered on the split ceramic sleeve (2), the split ceramic sleeve (2) serving to precisely align the beam expanding assembly (3) in the plug and receptacle.
3. The power tolerant FC fiber optic connector of any one of claims 1 or 2, wherein the beam expander assembly (3) comprises a lens (3-1), an end cap (3-2), an outer ferrule (3-3), an inner ferrule (3-4), a metal sleeve (3-5), and an optical fiber (3-6); the inner insertion core (3-4) is pressed into the metal sleeve (3-5), the end cap (3-2) is welded at the front end of the optical fiber (3-6), and the optical fiber welded with the end cap (3-2) penetrates into the inner insertion core (3-4) and is solidified; the front end of the inner insertion core (3-4) is provided with a beam expanding lens (3-1), the size of the beam expanding lens (3-1) is smaller than that of the inner insertion core (3-4), and the optical axis of a light spot after beam expansion is superposed with the physical axis of the insertion core; the outer part of the inner inserting core (3-4) is sleeved with an outer inserting core (3-3), and the lens (3-1) is sunken in the end face of the outer inserting core (3-2).
4. The power tolerant FC fiber optic connector of claim 3, wherein the curing is performed with glue (3-7).
5. The power tolerant FC fiber optic connector of claim 3, wherein the plug comprises a plug housing (1), the beam expanding element (3) being mounted in the plug housing (1).
6. The power tolerant FC fiber optic connector of claim 3, wherein the receptacle comprises a receptacle housing (4), the beam expanding element (3) being mounted in the receptacle housing (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111338877.8A CN113866890A (en) | 2021-11-12 | 2021-11-12 | Power-resistant FC optical fiber connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111338877.8A CN113866890A (en) | 2021-11-12 | 2021-11-12 | Power-resistant FC optical fiber connector |
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| Publication Number | Publication Date |
|---|---|
| CN113866890A true CN113866890A (en) | 2021-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111338877.8A Pending CN113866890A (en) | 2021-11-12 | 2021-11-12 | Power-resistant FC optical fiber connector |
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| Country | Link |
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| CN (1) | CN113866890A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110471145A (en) * | 2019-09-06 | 2019-11-19 | 上海传输线研究所（中国电子科技集团公司第二十三研究所） | A kind of expanded core fiber bonder terminal |
| CN111505773A (en) * | 2020-05-13 | 2020-08-07 | 上海航天科工电器研究院有限公司 | Reinforced anti-rotation beam expanding optical fiber contact |
| CN113067236A (en) * | 2021-02-24 | 2021-07-02 | 武汉锐科光纤激光技术股份有限公司 | Laser output head |
-
2021
- 2021-11-12 CN CN202111338877.8A patent/CN113866890A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110471145A (en) * | 2019-09-06 | 2019-11-19 | 上海传输线研究所（中国电子科技集团公司第二十三研究所） | A kind of expanded core fiber bonder terminal |
| CN111505773A (en) * | 2020-05-13 | 2020-08-07 | 上海航天科工电器研究院有限公司 | Reinforced anti-rotation beam expanding optical fiber contact |
| CN113067236A (en) * | 2021-02-24 | 2021-07-02 | 武汉锐科光纤激光技术股份有限公司 | Laser output head |
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Application publication date: 20211231 |