CN201854283U - Optical line terminal (OLT) single-fiber two-way transmission optical transceiver module - Google Patents
Optical line terminal (OLT) single-fiber two-way transmission optical transceiver module Download PDFInfo
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- CN201854283U CN201854283U CN2010206198441U CN201020619844U CN201854283U CN 201854283 U CN201854283 U CN 201854283U CN 2010206198441 U CN2010206198441 U CN 2010206198441U CN 201020619844 U CN201020619844 U CN 201020619844U CN 201854283 U CN201854283 U CN 201854283U
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Abstract
The utility model provides an optical line terminal (OLT) single-fiber two-way transmission optical transceiver module which comprises a transistor outline (TO) package-type light transmitter module, a free-space optical isolator, a first globe lens, a light dividing device, a wavelength division multiplexing filter, a second globe lens and a single fiber which are sequentially arranged along a horizontal optical axis, wherein the light diving device and the horizontal optical axis form a slant angle of 135 degree plus or minus 3 degrees, and the wavelength division multiplexing filter and the horizontal optical axis form a slant angle of 45 degree plus or minus 3 degrees. A first TO package-type optical receiver module and a second TO package-type optical receiver module are respectively arranged on the upper side and the lower side of the horizontal optical axis. The optical axes of the first TO package-type optical receiver module and the second TO package-type optical receiver module are respectively perpendicular to the horizontal optical axis. A light absorbing film inclined surface is arranged on the surface of the pipe cap of the second TO package-type optical receiver module. Since the first TO package-type optical receiver module which is used for receiving an uplink fault optical signal lambda 1a'' formed after light is reflected by a network fault point, the OLT single-fiber two-way transmission optical transceiver module can monitor network sub-link faults. When a fault occurs, an optical time-domain reflectometry (OTDR) is not required and thereby the network maintenance cost can be saved.
Description
Technical field
The utility model relates to Optical Access Network with the optical line terminal light transmit-receive integrated assembly of (Optical Line Terminal is called for short OLT), relates in particular to a kind of OLT single fiber transmitted in both directions light transmitting-receiving subassembly.
Background technology
The single fiber assembly that is used for the OLT end at present mainly adopts the two-way dual-port assembly of single fiber (Bidirectional Optical Sub-Assembly, be called for short the BOSA assembly), this BOSA assembly is by a two-way transmission single fiber, one transistor outline package TO(Transistor Outline, hereinafter to be referred as TO) the encapsulation light emission component, the light transmit-receive integrated assembly that one a TO encapsulation optical fiber receive module and a wave-division multiplexer filter form, be mainly used in the message transmission that realizes terminal and user side, and whether break down in the monitor message transmission course simultaneously, find fault-signal occurrence positions in the optical fiber link if desired, current main employing optical time domain reflectometer (Optical Time Domain Reflector, be called for short OTDR), there is following shortcoming thus: 1, the OTDR apparatus expensive; If 2 when OLT end detection failure, in case certain network sublink breaks down, at first this OLT outage must be inserted the particular location of OTDR trouble-shooting point then, other network service of same like this OLT respective links will all be interrupted; If 3 when the position of the user side detection failure point that reports an error, though the method does not influence other network service of same OLT respective links, the personnel of needing repairing provide and make house calls, and cause maintenance cost to increase.
Summary of the invention
For overcoming above shortcoming, the utility model provides a kind of OLT single fiber transmitted in both directions light transmitting-receiving subassembly of monitoring the optical fiber link failure.
For reaching above goal of the invention, the utility model provides a kind of OLT single fiber transmitted in both directions light transmitting-receiving subassembly, comprise: be disposed with TO encapsulation light emission component along horizontal optical axis, one free space type optical isolator, one first lens, one light-dividing device, one wave-division multiplexer filter, one second lens, one single fiber, wherein, described light-dividing device and wave-division multiplexer filter and horizontal optical axis are the inclination angle of 135 ° ± 3 ° and 45 ° ± 3 ° respectively, be positioned at described horizontal optical axis and also be respectively equipped with first in both sides up and down, the 2nd TO encapsulates optical fiber receive module, its optical axis is vertical respectively with horizontal optical axis, the pipe cap surface of described the 2nd TO encapsulation optical fiber receive module is provided with the extinction film, described TO encapsulation light emission component will converge light by first lens and become directional light after the downlink optical signal λ 1 of user side emission is by the free space type optical isolator, parallelly be incident to described light-dividing device, this light-dividing device carries out transmission and reflection with downlink optical signal λ 1 respectively by the luminous power percentage size, wherein the big percentage luminous power downlink optical signal λ 1a of transmission is incident to described wave-division multiplexer filter along described horizontal optical axis is parallel, parallel again second lens that are incident to behind total transmissivity outwards export user side to through its light end face that converges to described single fiber; The little percentage luminous power downlink optical signal λ 1b of reflection is to described extinction film absorption; Import by the light end face of described single fiber from the uplink optical signal λ 2 of described user side emission with by the up fault light signal λ 1a 〞 that user side reflects, and will converge light by second lens and become directional light and be incident to wave-division multiplexer filter, this wave-division multiplexer filter is total reflection uplink optical signal λ 2 on the one hand, is received by the 2nd TO encapsulation optical fiber receive module; The up fault light signal of total transmissivity λ 1a 〞 on the other hand, parallel more described light-dividing device total reflection to the TO encapsulation optical fiber receive module that is incident to of the light signal after the transmission receives.
The pipe cap part of described the 2nd TO encapsulation optical fiber receive module is provided with described extinction film inclined plane.
Be provided with extinction film inclined plane around the pipe cap of described the 2nd TO encapsulation optical fiber receive module.
Described first lens and second lens are globe lens or non-globe lens.
The adjacent of described extinction film 91A also is provided with an extinction plug and is used to absorb downlink optical signal λ 1b.
Described light-dividing device can be light splitting piece or polarization splitting prism PBS.
Owing to encapsulate light emission component and the 2nd TO encapsulation optical fiber receive module that receives from user's uplink optical signal λ 2 except being provided with the TO that is used for transmitting downstream light signal λ 1 in the OLT single fiber transmitted in both directions light transmitting-receiving subassembly of said structure, also be provided with the TO encapsulation optical fiber receive module that is used to receive from the up fault light signal λ 1a 〞 that forms behind the network failure point reflection in addition, but the OLT single fiber transmitted in both directions light transmitting-receiving subassembly that the overall optical assembly is become have monitor network sublink fault, when fault takes place, no longer need optical time domain reflectometer OTDR, so just can save network cost; Can also save workload in addition, if a certain sublink breaks down in signals transmission, as long as the user reports an error, just can directly itself detect the fault occurrence positions by the OLT optical assembly, promptly survey the luminous intensity that receives up fault light signal λ 1a 〞 by TO encapsulation optical fiber receive module, calculating transmits the time of sending to time of reception from the fault point, can judge the fault point exactly, the OLT end needn't quit work, also needn't go up user side, reduce the maintenance of network cost effectively.
Description of drawings
Fig. 1 represents the utility model OLT single fiber transmitted in both directions light transmitting-receiving subassembly first embodiment light channel structure schematic diagram.
Fig. 2 represents the utility model OLT single fiber transmitted in both directions light transmitting-receiving subassembly second embodiment light channel structure schematic diagram.
Embodiment
Describe the utility model most preferred embodiment in detail below in conjunction with accompanying drawing.
OLT single fiber transmitted in both directions light transmitting-receiving subassembly as shown in Figure 1, comprise: be disposed with TO encapsulation light emission component 10 along horizontal optical axis, one free space type optical isolator 20, one first globe lens 30, one light-dividing device 40, one wave-division multiplexer filter 50, one second globe lens 60, one single fiber 70, wherein, light-dividing device 40 and wave-division multiplexer filter 50 and horizontal optical axis are the inclination angle of 135 ° ± 3 ° and 45 ° ± 3 ° respectively, be positioned at horizontal optical axis and also be respectively equipped with TO encapsulation optical fiber receive module 80 in both sides up and down, the 2nd TO encapsulation optical fiber receive module 90A, its optical axis is vertical respectively with horizontal optical axis, the pipe cap surface local of the 2nd TO encapsulation optical fiber receive module 90A is provided with extinction film inclined plane 91A, TO encapsulation light emission component 10 will converge light by free space type optical isolator 20 backs by first globe lens 30 to the downlink optical signal λ 1 of user side emission and become directional light, the parallel light-dividing device 40 that is incident to, this device can be light splitting piece or polarization splitting prism PBS, downlink optical signal λ 1 is carried out transmission and reflection respectively by the luminous power percentage size, wherein the big percentage luminous power downlink optical signal λ 1a of transmission is along stating the parallel wave-division multiplexer filter 50 that is incident to of horizontal optical axis, parallel again second globe lens 60 that is incident to outwards exports user side to through its light end face that converges to single fiber 70 behind total transmissivity; The little percentage luminous power downlink optical signal λ 1b of reflection absorbs to extinction film inclined plane 91A, and in order to strengthen extinction effect, the adjacent of extinction film 91A also is provided with an extinction plug 100 and is used to absorb downlink optical signal λ 1b.Import by the light end face of single fiber 70 from the uplink optical signal λ 2 of user side emission with by the up fault light signal λ 1a 〞 that user side reflects, and will converge light by second globe lens 60 and become directional light and be incident to wave-division multiplexer filter 50, this wave-division multiplexer filter is total reflection uplink optical signal λ 2 on the one hand, and 90A receives by the 2nd TO encapsulation optical fiber receive module; The up fault light signal of total transmissivity λ 1a 〞 on the other hand, light signal after the transmission is parallel again to be incident to described light-dividing device 40 total reflections to the TO encapsulation optical fiber receive module 80 and to receive, by it light signal is changeed signal of telecommunication output, according to this output signal the fault point network data is analyzed, or else the personnel of needing repairing carry OTDR and make house calls, and have saved the grid maintenance cost.The optical isolator 20 of free space type is used to isolate up fault light signal λ 1a 〞 and uplink optical signal λ 2, makes the transmitting illuminant of TO encapsulation light emission component 10 interference-free.The one TO encapsulation optical fiber receive module 80, the 2nd TO encapsulation optical fiber receive module 90A can be set to flat window pipe cap, external lens.First globe lens 30 and second globe lens 60 also can be non-globe lenss.The wavelength of downlink optical signal λ 1 and up fault light signal λ 1a 〞 is 1480～1500nm, and the wavelength of uplink optical signal λ 2 is 1260～1360nm.
A kind of OLT single fiber transmitted in both directions light transmitting-receiving subassembly as shown in Figure 2 is close with structure shown in Figure 1, its improvements: owing to be provided with extinction film inclined plane around the pipe cap of the 2nd TO shown in Figure 2 encapsulation optical fiber receive module 90B, replaced shown in Fig. 1 the 2nd TO encapsulation optical fiber receive module 90A that pipe cap surface local only is provided with extinction film inclined plane 91A, all the other light channel structures do not become.
Claims (6)
1. OLT single fiber transmitted in both directions light transmitting-receiving subassembly, it is characterized in that, comprise: be disposed with TO encapsulation light emission component along horizontal optical axis, one free space type optical isolator, one first lens, one light-dividing device, one wave-division multiplexer filter, one second lens, one single fiber, wherein, described light-dividing device and wave-division multiplexer filter and horizontal optical axis are the inclination angle of 135 ° ± 3 ° and 45 ° ± 3 ° respectively, be positioned at described horizontal optical axis and also be respectively equipped with first in both sides up and down, the 2nd TO encapsulates optical fiber receive module, its optical axis is vertical respectively with horizontal optical axis, the pipe cap of described the 2nd TO encapsulation optical fiber receive module is provided with an extinction film inclined plane, on this inclined-plane, described TO encapsulation light emission component will converge light by first lens and become directional light after the downlink optical signal λ 1 of user side emission is by the free space type optical isolator, parallelly be incident to described light-dividing device, this light-dividing device carries out transmission and reflection with downlink optical signal λ 1 respectively by the luminous power percentage size, wherein the big percentage luminous power downlink optical signal λ 1a of transmission is incident to described wave-division multiplexer filter along described horizontal optical axis is parallel, parallel again second lens that are incident to behind total transmissivity outwards export user side to through its light end face that converges to described single fiber; The little percentage luminous power downlink optical signal λ 1b of reflection absorbs to described extinction film inclined-plane; Import by the light end face of described single fiber from the uplink optical signal λ 2 of described user side emission with by the up fault light signal λ 1a 〞 that user side reflects, and will converge light by described second lens and become directional light and be incident to wave-division multiplexer filter, this wave-division multiplexer filter is total reflection uplink optical signal λ 2 on the one hand, is received by the 2nd TO encapsulation optical fiber receive module; The up fault light signal of total transmissivity λ 1a 〞 on the other hand, parallel more described light-dividing device total reflection to the TO encapsulation optical fiber receive module that is incident to of the light signal after the transmission receives.
2. OLT single fiber transmitted in both directions light transmitting-receiving subassembly according to claim 1 is characterized in that, the pipe cap part of described the 2nd TO encapsulation optical fiber receive module is provided with described extinction film inclined plane.
3. OLT single fiber transmitted in both directions light transmitting-receiving subassembly according to claim 1 is characterized in that, is provided with extinction film inclined plane around the pipe cap of described the 2nd TO encapsulation optical fiber receive module.
4. according to claim 2 or 3 described OLT single fiber transmitted in both directions light transmitting-receiving subassemblies, it is characterized in that described first lens and second lens are globe lens or non-globe lens.
5. OLT single fiber transmitted in both directions light transmitting-receiving subassembly according to claim 4 is characterized in that the adjacent of described extinction film 91A also is provided with an extinction plug and is used to absorb downlink optical signal λ 1b.
6. OLT single fiber transmitted in both directions light transmitting-receiving subassembly according to claim 5 is characterized in that described light-dividing device can be light splitting piece or polarization splitting prism PBS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206198441U CN201854283U (en) | 2010-11-23 | 2010-11-23 | Optical line terminal (OLT) single-fiber two-way transmission optical transceiver module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206198441U CN201854283U (en) | 2010-11-23 | 2010-11-23 | Optical line terminal (OLT) single-fiber two-way transmission optical transceiver module |
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| CN201854283U true CN201854283U (en) | 2011-06-01 |
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| CN2010206198441U Expired - Lifetime CN201854283U (en) | 2010-11-23 | 2010-11-23 | Optical line terminal (OLT) single-fiber two-way transmission optical transceiver module |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102356573A (en) * | 2011-08-18 | 2012-02-15 | 华为技术有限公司 | Optical sending and receiving component and optical sending and receiving module |
| CN102843195A (en) * | 2011-06-23 | 2012-12-26 | 深圳新飞通光电子技术有限公司 | Light receiving and transmitting integrated module of OLT (optical line terminal) |
| CN104459904B (en) * | 2013-09-18 | 2016-05-04 | 福州高意通讯有限公司 | A kind of single fiber bi-directional BOSA structure |
| CN113917628A (en) * | 2021-09-15 | 2022-01-11 | 武汉华工正源光子技术有限公司 | Combo Plus OLT optical device |
| EP4283355A1 (en) * | 2022-05-17 | 2023-11-29 | Ezconn Corporation | Optical transmission device |
-
2010
- 2010-11-23 CN CN2010206198441U patent/CN201854283U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102843195A (en) * | 2011-06-23 | 2012-12-26 | 深圳新飞通光电子技术有限公司 | Light receiving and transmitting integrated module of OLT (optical line terminal) |
| CN102356573A (en) * | 2011-08-18 | 2012-02-15 | 华为技术有限公司 | Optical sending and receiving component and optical sending and receiving module |
| CN102356573B (en) * | 2011-08-18 | 2014-09-17 | 华为技术有限公司 | Optical sending and receiving component and optical sending and receiving module |
| US8909054B2 (en) | 2011-08-18 | 2014-12-09 | Huawei Technologies Co., Ltd. | Bi-direction optical sub-assembly and optical transceiver |
| CN104459904B (en) * | 2013-09-18 | 2016-05-04 | 福州高意通讯有限公司 | A kind of single fiber bi-directional BOSA structure |
| CN113917628A (en) * | 2021-09-15 | 2022-01-11 | 武汉华工正源光子技术有限公司 | Combo Plus OLT optical device |
| EP4283355A1 (en) * | 2022-05-17 | 2023-11-29 | Ezconn Corporation | Optical transmission device |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110601 |