CN108199773B - OLT optical transceiver integrated machine of EPON - Google Patents
OLT optical transceiver integrated machine of EPON Download PDFInfo
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- CN108199773B CN108199773B CN201711462157.6A CN201711462157A CN108199773B CN 108199773 B CN108199773 B CN 108199773B CN 201711462157 A CN201711462157 A CN 201711462157A CN 108199773 B CN108199773 B CN 108199773B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 39
- 239000013307 optical fiber Substances 0.000 claims abstract description 60
- 230000007704 transition Effects 0.000 claims description 12
- 230000000295 complement effect Effects 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Signal Processing (AREA)
- Optical Couplings Of Light Guides (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses an OLT optical transceiver integrated machine of an EPON network, which comprises an OLT module and an optical transceiver module, wherein the OLT module is positioned at an optical fiber trunk terminal and distributes bandwidth for ONU; the optical transceiver module comprises a beam expanding unit for uniformly diffusing light beams, a converging unit for converging the diffused light beams and an optical fiber bundle with the cross-sectional area of the optical fiber changing regularly, and the OLT module, the beam expanding unit, the converging unit and the optical fiber bundle are connected in sequence through signals. The coverage range of OLT equipment can be enlarged, and laying cost and maintenance cost are reduced.
Description
Technical Field
The invention relates to OLT equipment, in particular to an OLT optical transceiver of an EPON.
Background
EPONs (passive optical networks based on ethernet) are a type of PON networks, and are a comprehensive access technology that is widely adopted to meet the requirements of high-rate broadband services such as video and data with the development of telecommunication technology. The EPON network consists of three parts, namely OLT, ODN and ONU. The point-to-multipoint network access method is mainly characterized in that the point-to-multipoint network access method is point-to-multipoint, the line is passive, the network level is simple and clear, and the comprehensive access of various services such as voice, broadband, CATV and the like can be provided. However, because the optical line is a passive line, the intensity of the optical signal is gradually attenuated in the transmission process, so that the transmission distance is limited, more OLT equipment needs to be laid, the cost is high, and the push of an EPON network is hindered.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an OLT optical transceiver of an EPON, which can increase the integration level and the coverage range of OLT equipment and reduce the laying cost and the maintenance cost.
In order to solve the technical problem, the invention provides an OLT optical transceiver integrated unit of an EPON network, which comprises an OLT module and an optical transceiver module, wherein the OLT module is positioned at an optical fiber trunk terminal and allocates bandwidth for an ONU; the optical transceiver module comprises a beam expanding unit for uniformly diffusing light beams, a converging unit for converging the diffused light beams and an optical fiber bundle with the cross-sectional area of the optical fiber changing regularly, and the OLT module, the beam expanding unit, the converging unit and the optical fiber bundle are connected in sequence through signals.
Preferably, the beam expanding unit includes a concave lens for expanding the light beam, the converging unit includes a convex lens located at a focal point of the concave lens, a focal length of the convex lens is the same as a focal length of the concave lens, and the light collecting surface of the optical fiber bundle is located at the focal point of the convex lens.
Preferably, the diameter of the light-receiving surface of the optical fiber bundle is not smaller than the diameter of the outgoing light beam of the converging unit.
Preferably, the radius of the light collecting surface of the converging unit is not less than the product of the focal length of the convex lens and the sine value of the residual angle of the total reflection angle of the optical fiber.
Preferably, the optical fiber bundle comprises a light receiving section, the cross section of the optical fiber in the light receiving section is a sector, the central angle of the sector changes regularly, and the sides of the sector are adjacent in sequence.
Preferably, the optical fiber bundle comprises a transition section for smoothly transitioning the optical fibers in the fan shape in the light receiving section into a circular shape.
Preferably, the optical fiber bundle comprises a self-focusing section with square-law distribution of the refractive index of the optical fiber.
Preferably, the transition section and the self-focusing section are detachably connected.
Compared with the prior art, the invention has the beneficial effects that:
1. the OLT module and the optical transceiver module are integrated, so that intermediate links are reduced, and the cost of equipment operation and maintenance is reduced.
2. According to the invention, by arranging the beam expanding unit, the converging unit and the optical fiber bundle, a downlink optical signal can be divided into a plurality of optical signals with different optical powers, so that the transmission requirements of ONU equipment at different distances are met, the coverage range of the OLT is greatly increased, and the laying cost is reduced.
3. The cross-sectional area of the optical fiber in the optical fiber bundle is changed according to a certain rule, so that the optical fiber distribution system can be suitable for different ONU distribution types, and the universality of equipment is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention 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 to be able to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of an optical transceiver module;
FIG. 3 is a schematic cross-sectional view of a light-receiving section;
fig. 4 is a schematic cross-sectional view of a transition section.
The device comprises a beam expanding unit 1, a converging unit 2, a light receiving section 3, a transition section 4, a self-focusing section 5, an OLT module 6 and an optical transceiver module 7.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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 any inventive step, are within the scope of the present invention.
Examples
Referring to fig. 1 to 4, the present invention discloses an OLT optical transceiver integrated unit of an EPON network, which includes an OLT module 6 and an optical transceiver module 7.
The OLT module 6 is disposed at the optical fiber trunk terminal, and sends ethernet data to the ONU in a broadcast manner, initiates and controls a ranging process, records ranging information, and allocates a bandwidth to the ONU, that is, controls the start time and the size of a transmission window for the ONU to send data.
The optical transceiver module 7 includes a beam expanding unit 1, a converging unit 2, and an optical fiber bundle.
The beam expanding unit 1 is signal connected to the OLT module 6, which comprises a concave lens. The concave lens can uniformly spread the incident light beam with the signal emitted by the OLT module 6.
The converging unit 2 is in signal connection with the beam expanding unit 1 and comprises a convex lens. The convex lens is positioned at the focal point of the concave lens, the focal length of the convex lens is the same as that of the concave lens, and the convex lens can converge the diffused light beams emitted by the beam expanding unit 1 and emit the converged light beams in parallel from the emergent surface of the converging unit 2.
The optical fiber bundle comprises a light receiving section 3, a transition section 4 and a self-focusing section 5. The light receiving surface of the light receiving section 3 is positioned at the focus of the convex lens. The optical fibers in the light receiving section 3 are all parallel to the central axis, the cross section of each optical fiber is in a fan shape, the central angle of each fan shape is regularly changed, the edges of the fan shapes are sequentially adjacent, and the arc of each fan shape forms a complete circumference. The diameter of the light-receiving section 3 is not less than that of the outgoing light beam of the converging unit 2. The central angles of different optical fibers on the light receiving section 3 can be an arithmetic progression, an geometric progression and the like, and are determined according to the distribution characteristics of the distances between the ONU and the optical transceiver module 7; for example, if the ONUs are all located at the same position from the optical transceiver module 7, the central angles of the optical fibers are equal, and if the distances between the ONUs and the optical transceiver module 7 gradually increase, the central angles of the optical fibers gradually increase. The fan-shaped optical fiber in the light receiving section 3 can completely receive the emergent light beam from the converging unit 2, and the utilization rate of the light beam is high; the central angle of the fan-shaped optical fiber is regularly changed, so that the light receiving area of the optical fiber is regularly changed, different optical powers are obtained, an optical fiber circuit with a smaller central angle is used for a closer ONU, and an optical fiber circuit with a larger central angle is used for a farther ONU. The light receiving section 3 can distribute light power according to the distance of the ONU, and can increase the farthest transmission distance of the optical signal under the condition of ensuring the normal transmission of the optical signal along the original line, thereby reducing the laying cost and accelerating the popularization of optical fiber data transmission. The transition section 4 is arranged on the emergent surface of the light receiving section 3, and the transition section enables the fan-shaped optical fibers in the light receiving section 3 to be gently transited into the circular optical fibers so as to be butted with the subsequent optical fibers. The light emitting surface of the transition section 4 is detachably arranged on the incident surface of the self-focusing section 5, the light receiving section 3 and the transition section 4 can be replaced according to the actual distribution condition of the ONU, and the universality of the equipment is improved. The optical fibers in the optical fiber light-receiving section 3 of the self-focusing section 5 are butted. The refractive index of the optical fiber of the self-focusing section 5 is distributed in a square law mode, and the optical fiber can automatically focus the light beam so as to increase the optical power in a unit area and increase the transmission distance of the optical signal. The self-focusing section 5 and the ONU are connected through an optical fiber.
The transmission path of the upstream optical signal may be the reverse of the transmission path of the downstream optical signal. The radius of the converging unit 2 and the adjacent light-receiving surface of the optical fiber bundle is not less than the product of the focal length of the convex lens and the sine value of the complementary angle of the total reflection angle of the optical fiber, when the light beam in the optical fiber bundle is emitted at the maximum emitting angle, the light beam can still be emitted into the converging unit 2, and the utilization efficiency is improved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. An OLT optical transceiver integrated machine of an EPON network is characterized by comprising an OLT module which is positioned at an optical fiber trunk terminal and distributes bandwidth for ONU and an optical transceiver module which is used for converging and splitting luminous signals;
the optical transceiver module comprises a beam expanding unit for uniformly diffusing light beams, a converging unit for converging the diffused light beams and an optical fiber bundle with the cross-sectional area of the optical fiber being changed regularly, and the OLT module, the beam expanding unit, the converging unit and the optical fiber bundle are in signal connection in sequence;
the optical fiber bundle comprises a light receiving section, the cross section of an optical fiber in the light receiving section is in a fan shape, the central angle of the optical fiber is regularly changed, and the edges of the optical fiber are sequentially adjacent;
the optical fiber bundle comprises a transition section which smoothly transitions the fan-shaped optical fiber in the light receiving section into a circular shape;
the optical fiber bundle comprises a self-focusing section with square-law distribution of optical fiber refractive index.
2. The OLT optical transceiver of an EPON network of claim 1, wherein the beam expanding unit comprises a concave lens for expanding a light beam, the converging unit comprises a convex lens located at a focal point of the concave lens, a focal length of the convex lens is the same as that of the concave lens, and a light receiving surface of the optical fiber bundle is located at a focal point of the convex lens.
3. The OLT optical transceiver of an EPON network of claim 2, wherein the diameter of a light-receiving surface of the fiber bundle is not less than the diameter of an outgoing light beam of the convergence unit.
4. The OLT optical transceiver of an EPON network of claim 3, wherein a radius of a light receiving surface of the condensing unit is not less than a product of a focal length of the convex lens and a sine value of a complementary angle of a total reflection angle of the optical fiber.
5. An OLT optical transceiver in an EPON network as defined by claim 1, wherein said transition section and said self-focusing section are removably connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711462157.6A CN108199773B (en) | 2017-12-28 | 2017-12-28 | OLT optical transceiver integrated machine of EPON |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711462157.6A CN108199773B (en) | 2017-12-28 | 2017-12-28 | OLT optical transceiver integrated machine of EPON |
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| CN108199773A CN108199773A (en) | 2018-06-22 |
| CN108199773B true CN108199773B (en) | 2020-02-14 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102347796A (en) * | 2010-08-03 | 2012-02-08 | 中国移动通信集团广东有限公司 | Optical fiber connection method, optical fiber transmitter, optical fiber receiver and optical fiber connection system |
| CN104735554A (en) * | 2013-12-23 | 2015-06-24 | 中国移动通信集团公司 | Passive optical network, device and method for adjusting logical splitting ratio of optical branching device |
| CN105676377A (en) * | 2016-03-28 | 2016-06-15 | 武汉电信器件有限公司 | Multi-direction light assembly and method of acquiring multi-direction light |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2677951Y (en) * | 2004-02-20 | 2005-02-09 | 浙江工业大学 | Fibre-optical cold light source |
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- 2017-12-28 CN CN201711462157.6A patent/CN108199773B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102347796A (en) * | 2010-08-03 | 2012-02-08 | 中国移动通信集团广东有限公司 | Optical fiber connection method, optical fiber transmitter, optical fiber receiver and optical fiber connection system |
| CN104735554A (en) * | 2013-12-23 | 2015-06-24 | 中国移动通信集团公司 | Passive optical network, device and method for adjusting logical splitting ratio of optical branching device |
| CN105676377A (en) * | 2016-03-28 | 2016-06-15 | 武汉电信器件有限公司 | Multi-direction light assembly and method of acquiring multi-direction light |
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| CN108199773A (en) | 2018-06-22 |
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Effective date of registration: 20210126 Address after: 264400 No. 88 Longshan Banhengshan Road, Wendeng District, Weihai City, Shandong Province Patentee after: HONGAN GROUP Co.,Ltd. Patentee after: SHANDONG PACIFIC OPTICAL FIBER CABLE Co.,Ltd. Address before: 264400 No. 88 Longshan Banhengshan Road, Wendeng District, Weihai City, Shandong Province Patentee before: HONGAN GROUP Co.,Ltd. |
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Effective date of registration: 20231010 Address after: 264200 No. 1, Longwei Road, Longshan office, Wendeng District, Weihai City, Shandong Province Patentee after: HONGAN GROUP Co.,Ltd. Address before: 264400 No. 88 Longshan Banhengshan Road, Wendeng District, Weihai City, Shandong Province Patentee before: HONGAN GROUP Co.,Ltd. Patentee before: SHANDONG PACIFIC OPTICAL FIBER CABLE Co.,Ltd. |