CN107153235B - Optical network unit - Google Patents
Optical network unit Download PDFInfo
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- CN107153235B CN107153235B CN201610120963.4A CN201610120963A CN107153235B CN 107153235 B CN107153235 B CN 107153235B CN 201610120963 A CN201610120963 A CN 201610120963A CN 107153235 B CN107153235 B CN 107153235B
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- optical
- bosa
- network unit
- circuit board
- opening
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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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4246—Bidirectionally operating package structures
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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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4274—Electrical aspects
- G02B6/428—Electrical aspects containing printed circuit boards [PCB]
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The present invention relates to the field of communications technologies, and in particular, to an optical network unit. The optical network unit can save interfaces between the tail fiber and the optical flange plate, thereby saving space, avoiding the reduction of optical transmission performance caused by the damage of the tail fiber and improving the optical transmission performance. The defect that the tail fiber is broken or bent easily due to the fact that the tail fiber needs to be coiled and fixed in the prior art, and the optical transmission performance is reduced is overcome. The embodiment of the invention provides an optical network unit, which comprises a circuit board and a BOSA (business architecture) arranged on the circuit board, wherein the BOSA is electrically connected with the circuit board; the optical transceiving end of the BOSA adopts a tailless fiber design; the optical network unit further comprises a packaging structure, the packaging structure is used for packaging and containing the BOSA, the packaging structure is fixed on the circuit board, an optical interface is arranged at the position, corresponding to the optical receiving and transmitting end of the BOSA, of the packaging structure, and the optical interface is used for realizing direct plugging and unplugging with an optical fiber. The invention is used for the production and the manufacture of the optical network unit.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an optical network unit.
Background
In the optical fiber communication technology, an optical network unit is a passive optical network access end device for short, and is used for transmitting optical signals with an optical line terminal, and an optical transceiver module in the optical network unit can perform photoelectric conversion.
In the prior art, a BOSA (BOSA onboard) mode of soldering a BOSA on a circuit board by using a BOSA with a tail fiber is generally adopted, the mode is to connect an optical flange interface at the tail end of the tail fiber to realize optical signal transmission between an optical network unit and an optical line terminal, the tail fiber needs to be coiled and fixed, structural limitation needs to be considered during coiling the fiber, the tail fiber is easily bent too much or broken, so that optical transmission performance is reduced, when the tail fiber is fixed, the risk of loose fixation exists, the tail fiber is easily damaged, and the optical transmission performance is affected.
Disclosure of Invention
The main objective of the present invention is to provide an optical network unit, which can save the interfaces between the tail fiber and the optical flange, thereby saving space, avoiding the decrease of optical transmission performance caused by the damage of the tail fiber, and improving optical transmission performance.
In order to achieve the purpose, the invention adopts the following technical scheme:
the embodiment of the invention provides an optical network unit, which comprises a circuit board and a BOSA (business architecture) arranged on the circuit board, wherein the BOSA is electrically connected with the circuit board;
the optical transceiving end of the BOSA adopts a tailless fiber design;
the optical network unit further comprises a packaging structure, the packaging structure is used for packaging and containing the BOSA, the packaging structure is fixed on the circuit board, an optical interface is arranged at the position, corresponding to the optical receiving and transmitting end of the BOSA, of the packaging structure, and the optical interface is used for realizing direct plugging and unplugging with an optical fiber.
Embodiments of the present invention provide an optical network unit, where a BOSA in the optical network unit adopts a tailless fiber design, and can save a pigtail and an optical flange interface, and an optical interface can be formed at an optical transceiver of the BOSA by setting a package structure and fixing the package structure on a circuit board, and the optical interface can replace the optical flange interface and an optical fiber to implement direct plugging and unplugging, so as to implement optical signal transmission between the optical network unit and the optical line terminal. The defect that the tail fiber is broken or bent easily due to the fact that the tail fiber needs to be coiled and fixed in the prior art, and the optical transmission performance is reduced 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 will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an optical network unit according to an embodiment of the present invention;
fig. 2 is a schematic external structural diagram of a BOSA according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an internal structure of a BOSA according to an embodiment of the present invention;
FIG. 4 is an exploded view of an assembly structure of a package structure and a BOSA according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an upper housing of a package structure according to an embodiment of the present invention;
fig. 6 is a schematic view of a lower housing of an encapsulation structure according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a second bonding pad and a second positioning hole according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
An optical network unit according to an embodiment of the present invention, referring to fig. 1 and fig. 2, includes a circuit board 1 and a BOSA2 disposed on the circuit board 1, where the BOSA2 is electrically connected to the circuit board 1;
the BOSA2 adopts a tailless fiber design;
the optical network unit further includes a package structure 3, where the package structure 3 is configured to package and accommodate the BOSA2, the package structure 3 is fixed on the circuit board 1, an optical interface 31 is disposed at a position of the package structure 3 corresponding to an optical transceiver end a of the BOSA2, and the optical interface 31 is configured to be directly plugged into and unplugged from an optical fiber.
The optical transceiving end of the BOSA2 is an end for receiving and transmitting an optical signal, when the BOSA2 is provided with a pigtail, a fiber core in the BOSA2 extends out through the optical transceiving end of the BOSA2 to form the pigtail, and since the BOSA2 adopts a pigtail-free design, in the embodiment of the present invention, the fiber core of the BOSA2 does not extend out of the optical transceiving end of the BOSA 2.
The embodiment of the invention provides an optical network unit, wherein a BOSA2 in the optical network unit adopts a tailless fiber design, so that tailfiber and an optical flange interface can be saved, an optical interface can be formed at an optical transceiving end A of a BOSA2 by arranging a packaging structure 3 and fixing the packaging structure 3 on a circuit board, the optical interface can replace the optical flange interface and an optical fiber to realize direct plugging, so that optical signal transmission between the optical network unit and an optical line terminal is realized, and by adopting the structure, space can be saved, optical transmission performance reduction caused by damage of the tailfiber is avoided, and optical transmission performance can be improved. The defect that the tail fiber is broken or bent easily due to the fact that the tail fiber needs to be coiled and fixed in the prior art, and the optical transmission performance is reduced is overcome.
Referring to fig. 3, since the BOSA2 is generally provided with a laser diode 21, a photodiode 22, an optical splitter 23, a coupling lens 24 and an optical filter 25, the optical splitter 23 is at 45 degrees in an optical path, the laser diode 21 is configured to receive an electrical signal and convert the electrical signal into an optical signal, the laser diode 21, the optical splitter 23, the coupling lens 24 and the optical interface 31 are coaxial with each other, and the optical axis is a straight line, and is a horizontal optical path, the optical signal emitted by the laser diode 21 is transmitted to the optical interface 31 through the optical splitter 23 and the coupling lens 24, so as to realize emitting the optical signal to an optical line terminal, and the optical filter 25 is provided between the optical splitter 23 and the photodiode 22, the photodiode 22 and the optical filter 25 are both coaxial with the reflection optical path of the optical splitter 23 and are a straight line, and are vertical optical paths perpendicular to the horizontal optical path, the optical line terminal inputs an optical signal through the optical interface 31, the optical signal is reflected to a vertical optical path through the optical splitter 23 after passing through the coupling lens 24, and enters the photodiode 22 after wavelength selection is performed through the optical filter 25, and the photodiode 22 converts the optical signal into an electrical signal, so that the optical signal is received.
The electrical connection mode between the BOSA2 and the circuit board 1 is not limited.
In an embodiment of the present invention, referring to fig. 2 and fig. 4, the BOSA2 includes a transmitting end B far away from the optical transceiving end a, and a receiving end C disposed between the optical transceiving end a and the transmitting end B and perpendicular to the plugging direction of the optical fiber, where the transmitting end B is provided with a transmitting pin 26, and the receiving end C is provided with a receiving pin 27; the circuit board 1 is provided with a first bonding pad corresponding to the emitting pin 26 and a second bonding pad corresponding to the receiving pin 27, the first bonding pad is provided with first positioning holes 11 corresponding to the emitting pins 26, and the second bonding pad 12 is provided with second positioning holes 12 corresponding to the receiving pins 27.
In the embodiment of the present invention, the BOSA2 can be electrically connected to the circuit board 1 by inserting the receiving pin 27 into the second positioning hole 12 and inserting the transmitting pin 26 into the first positioning hole 11.
The specific structure of the package structure 3 is not limited, and the package structure 3 may be assembled in any form as long as the package structure can accommodate the BOSA2 and form the optical interface 31.
In an embodiment of the present invention, referring to fig. 4, the package structure 3 includes an upper housing 32 and a lower housing 33 that are fastened to each other, the package structure 3 is provided with a first opening (not shown) and a second opening (not shown), the receiving pin 27 is inserted into the second positioning hole 12 through the second opening, and the emitting pin 26 is inserted into the first positioning hole 11 through the first opening.
In the embodiment of the present invention, when the optical network unit is assembled, the BOSA2 may be placed on the lower housing 33, and then the upper housing 32 and the lower housing 33 are fastened together, so that the process is simple and easy to implement, and the manufacturing is convenient.
The BOSA2 may be completely placed in the package structure 3, or may be partially placed in the package structure 3.
When the BOSA2 is completely placed in the package structure 3, the lower case 33 completely covers the first and second pads, and the first and second openings may be disposed on the lower case 33. When the BOSA2 is partially placed in the package structure 3, for example, when the emitter pins 26 are located outside the package structure 3, the first pads corresponding to the emitter pins 26 are not covered by the lower case 33, and the positions of the first and second openings can be determined as required.
In an embodiment of the present invention, the second opening is disposed on the lower housing 33, and the first opening is disposed on a side of the package structure 3 opposite to the optical interface 31.
In the embodiment of the present invention, since the emission end B of the BOSA2 is located far away from the optical transceiving end a, by opening a first opening on a side of the package structure 3 opposite to the optical interface 31, the emission pin 26 may protrude out of the package structure 3 through the first opening and be inserted into the first positioning hole 11.
In another embodiment of the present invention, referring to fig. 4, 5 and 6, the first opening is formed by mutually enclosing a semicircular groove provided on the upper housing 32 and a semicircular groove provided on the lower housing 33, the emitting end B passes through the first opening and is disposed outside the package structure 3, and the first opening and the emitting end B are buckled.
In the embodiment of the present invention, when the optical network unit is assembled, the BOSA2 is first placed on the lower housing 33, the lower surface of the transmitting end B is attached to the semicircular groove on the lower housing 33, the upper housing 32 is then fastened and fixed to the lower housing 33, and the upper surface of the transmitting end B is attached to the semicircular groove on the upper housing 32, so that the BOSA2 can be fixed, and the assembly is convenient; further, when the optical fiber is inserted into and pulled out from the optical interface 31, the acting force acting on the BOSA2 can be transmitted to the package structure 3, and the BOSA2 can be prevented from being damaged.
In an embodiment of the present invention, referring to fig. 6, a groove 34 matching with the shape of the lower surface of the optical transceiving end a is disposed on the inner surface of the lower housing 33 near the optical transceiving end a, and the groove 34 is used for receiving and fixing the optical transceiving end a.
In the embodiment of the present invention, by fixing the optical transceiver end a in the lower housing 33, when the optical fiber is inserted into and pulled out from the optical interface 31, the acting force acting on the BOSA2 can be transmitted to the package structure 3, and the BOSA2 can be prevented from being damaged.
Note that, since the beam position in the vertical direction is not determined when the beam splitter 23 performs beam splitting, the position of the receiving pin 27 may be deviated.
In an embodiment of the present invention, the position of the receiving pin 27 in the second positioning hole 12 is adjustable along the inserting and pulling direction of the optical fiber.
In the embodiment of the present invention, since the position of the receiving pin 27 in the second positioning hole 12 is adjustable along the inserting and pulling direction of the optical fiber, the light beams reflected by the receiving pin 27 and the optical splitter 13 can be aligned, so that the optical path coupling efficiency can be improved.
The shape of the second positioning hole 12 is not limited, and the second positioning hole 12 may be rectangular, circular, oval, or the like.
In an embodiment of the present invention, referring to fig. 7, the second positioning hole 12 is an ellipse, and an extending direction of a major axis of the ellipse is consistent with a plugging direction of the optical fiber.
The fixing manner of the package structure 3 and the circuit board 1 is not limited. The package structure 3 and the circuit board 1 may be fixed by adhesion.
In another embodiment of the present invention, referring to fig. 4, the bottom of the lower housing 33 is provided with at least two positioning pins 331, each of the positioning pins 331 is provided with a clamping portion (not shown), the circuit board 1 is provided with third positioning holes 13 corresponding to the positioning pins 331 in one-to-one manner in position and shape, and the positioning pins 331 and the third positioning holes 13 are clamped and fixed to each other.
Through inciting somebody to action packaging structure 3 with circuit board 1 is fixed through the joint mode, and is fixed comparatively firm, can prevent down that casing 33 from following drop on the circuit board 1.
The manner of the snap-fit connection between the upper case 32 and the lower case 33 is not limited.
In an embodiment of the present invention, referring to fig. 4, 5 and 6, at least two claws 321 are disposed on an edge of the upper housing 32, and a locking groove (not shown) is disposed on the lower housing 33 corresponding to the claws 321, and the claws 321 are locked with the locking groove.
In another embodiment of the present invention, referring to fig. 4, 5 and 6, a hollow structure 35 is disposed on the upper surface of the upper housing 32, and the hollow structure 35 includes: a third opening (not shown) corresponding to the position of the label on the BOSA2, through which the label on the BOSA2 is exposed.
Because BOSA2 is the device that generates heat, through setting up hollow out construction 35, can accelerate the heat dissipation, extension BOSA 2's life.
In an embodiment of the present invention, referring to fig. 4, the optical network unit further includes an insulating spacer 4, through holes (not shown) corresponding to the receiving pins 27 are formed in the insulating spacer 4, the insulating spacer 4 is sleeved on the receiving pins 27, and when the receiving pins 27 are inserted into the second positioning holes 12 in a one-to-one correspondence manner, the insulating spacer 4 is located on the upper end surface of the second positioning hole 12.
Since the receiving pins 27 need to be soldered and fixed after the BOSA2 is assembled on the circuit board 1, and the receiving pins 27 can move in the second positioning holes 12, the second positioning holes 12 are relatively large, solder can easily penetrate between the receiving pins 27 along the gap between the second positioning holes 12 and the receiving pins 27, which may cause a short circuit phenomenon.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. An optical network unit comprises a circuit board and a BOSA arranged on the circuit board, wherein the BOSA is electrically connected with the circuit board; it is characterized in that the preparation method is characterized in that,
the optical transceiving end of the BOSA adopts a tailless fiber design;
the optical network unit further comprises a packaging structure, the packaging structure is used for packaging and containing the BOSA, the packaging structure is fixed on the circuit board, an optical interface is arranged at the optical receiving and transmitting end of the packaging structure corresponding to the BOSA, and the optical interface is used for realizing direct plugging and unplugging with an optical fiber;
the packaging structure comprises an upper shell and a lower shell which are buckled with each other, at least two positioning pins are arranged at the bottom of the lower shell, each positioning pin is provided with a clamping part, a third positioning hole is arranged on the circuit board, corresponds to the positioning pins in a one-to-one mode in terms of position and shape, and the positioning pins and the third positioning holes are clamped and fixed with each other.
2. The optical network unit of claim 1,
the BOSA comprises a transmitting end far away from the optical transceiving end and a receiving end which is arranged between the optical transceiving end and the transmitting end and is vertical to the plugging direction of the optical fiber, wherein the transmitting end is provided with a transmitting pin, and the receiving end is provided with a receiving pin;
the circuit board is provided with a first bonding pad corresponding to the transmitting pins and a second bonding pad corresponding to the receiving pins, the first bonding pad is provided with first positioning holes corresponding to the transmitting pins one to one, and the second bonding pad is provided with second positioning holes corresponding to the receiving pins one to one.
3. The optical network unit of claim 2,
the packaging structure is provided with a first opening and a second opening, the receiving pin is inserted into the second positioning hole through the second opening, and the transmitting pin is inserted into the first positioning hole through the first opening.
4. The optical network unit of claim 3,
the second opening is disposed on the lower case, and the first opening is disposed on a side of the package structure opposite to the optical interface.
5. The optical network unit of claim 4,
the first opening is formed by mutually enclosing a semicircular groove arranged on the upper shell and a semicircular groove arranged on the lower shell, the transmitting end penetrates through the first opening and is arranged outside the packaging structure, and the first opening is attached to the transmitting end.
6. The ONU of claim 3, wherein a groove matching with the shape of the lower surface of the optical transceiver end is disposed on the inner surface of the lower housing near the optical transceiver end, and the groove is used for fixing the BOSA.
7. The ONU of claim 3, wherein the position of the receiving pin in the second positioning hole is adjustable along the plugging direction of the optical fiber.
8. The optical network unit according to claim 7, wherein the second positioning hole has an oval shape, and a long axis extending direction of the oval shape is identical to a plugging direction of the optical fiber.
9. The ONU of claim 3, wherein the upper surface of the upper housing is provided with a hollow structure, and the hollow structure comprises: and the third opening is arranged corresponding to the position of the label on the BOSA, and the label on the BOSA is exposed outside through the third opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610120963.4A CN107153235B (en) | 2016-03-03 | 2016-03-03 | Optical network unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610120963.4A CN107153235B (en) | 2016-03-03 | 2016-03-03 | Optical network unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107153235A CN107153235A (en) | 2017-09-12 |
| CN107153235B true CN107153235B (en) | 2020-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610120963.4A Active CN107153235B (en) | 2016-03-03 | 2016-03-03 | Optical network unit |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110727064B (en) * | 2019-10-31 | 2022-12-16 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN110995360B (en) * | 2019-11-29 | 2020-12-11 | 四川天邑康和通信股份有限公司 | Receiving end pin connecting circuit based on 10G EPON ONU BOB optical module |
| CN111596420B (en) * | 2020-05-09 | 2022-12-09 | 武汉光迅科技股份有限公司 | Optical network terminal |
| CN114942494B (en) * | 2022-05-27 | 2023-03-28 | 深圳市力子光电科技有限公司 | BOSA card seat |
| CN116626820A (en) * | 2022-09-26 | 2023-08-22 | 武汉光迅科技股份有限公司 | BOSA device assembling device and mounting method thereof |
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| JP2005070177A (en) * | 2003-08-20 | 2005-03-17 | Matsushita Electric Ind Co Ltd | Optical fiber, light shield forming method, bidirectional optical module, optical transmitter-receiver, and bidirectional optical transmission system |
| CN202256784U (en) * | 2011-08-16 | 2012-05-30 | 深圳市国扬通信股份有限公司 | Optical device |
| CN202533614U (en) * | 2012-04-23 | 2012-11-14 | 太仓市同维电子有限公司 | Space-saving optical module |
| CN103091798A (en) * | 2011-11-08 | 2013-05-08 | 鸿富锦精密工业（深圳）有限公司 | Connector module |
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Patent Citations (4)
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| JP2005070177A (en) * | 2003-08-20 | 2005-03-17 | Matsushita Electric Ind Co Ltd | Optical fiber, light shield forming method, bidirectional optical module, optical transmitter-receiver, and bidirectional optical transmission system |
| CN202256784U (en) * | 2011-08-16 | 2012-05-30 | 深圳市国扬通信股份有限公司 | Optical device |
| CN103091798A (en) * | 2011-11-08 | 2013-05-08 | 鸿富锦精密工业（深圳）有限公司 | Connector module |
| CN202533614U (en) * | 2012-04-23 | 2012-11-14 | 太仓市同维电子有限公司 | Space-saving optical module |
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