CN205725759U - A kind of passive fiber transmission access system - Google Patents
A kind of passive fiber transmission access system Download PDFInfo
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- CN205725759U CN205725759U CN201620324340.4U CN201620324340U CN205725759U CN 205725759 U CN205725759 U CN 205725759U CN 201620324340 U CN201620324340 U CN 201620324340U CN 205725759 U CN205725759 U CN 205725759U
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Abstract
The utility model provides a kind of passive fiber transmission access system, belongs to fiber-optic communications traffic technical field.Described system includes: erbium and ytterbium codoping image intensifer, draw the high-power input optical branching device of cone, PLC optical branching device and passive enter house type optical receiving device；The light of erbium and ytterbium codoping image intensifer is gone out end and is connected with drawing the light input end boring high-power input optical branching device by optical fiber, draw and bore the light output end of high-power input optical branching device and be connected with PLC optical branching device by optical fiber, the light output end of PLC optical branching device by optical fiber with passive enter house type photoreceiver light input end be connected.The utility model by erbium and ytterbium codoping image intensifer, draw the high-power input optical branching device of cone and passive enter house type optical receiving device constitute passive fiber transmission access system, compared with the access network that existing active family expenses optical receiving device is constituted, erbium and ytterbium codoping image intensifer and draw the high-power input light branch of cone all to concentrate on branch center machine room, and end of registering one's residence does not uses power supply adaptor, there is energy-conserving and environment-protective, safe and reliable and lower-cost advantage.
Description
Technical field
The utility model relates to a kind of passive fiber transmission access system, belongs to fiber-optic communications traffic technical field.
Background technology
EDFA Erbium-Doped Fiber Amplifier, cone optical branching device (input optical power be less than 0.5mW) and PLC optical branching device is drawn to be to show
Have equipment more common in fibre-optic transmission system (FOTS), for active enter house type optical receiving device constitute Optical Access Network.
Owing to the peak power output of existing EDFA Erbium-Doped Fiber Amplifier is usually 26dBm, and commonly use Output optical power
Scope generally between 18dBm～23dBm.Therefore, if at FTTH (Fiber To The Home, optical fiber
Register one's residence) in use, it is necessary to a fairly large number of active enter house type optical receiving device, and multiple active enter house type light connect
Receiving unit needs the more dispersion arranged, causes the raising of networking cost and the reduction of system reliability.In addition, it is every
Family arrange active enter house type optical receiving device be both needed to external power adapter, further increase networking cost and fall
The low reliability of system.
Utility model content
The utility model for solve existing active enter house type optical receiving device exist need in the system of fiber entering household
The to be arranged problem that the networking cost more disperseing to cause is higher and system reliability is relatively low, and then propose one
Passive fiber transmission access system, specifically includes following technical scheme:
A kind of passive fiber transmission access system, comprising: erbium and ytterbium codoping image intensifer, draw the high-power input light branch of cone
Device, PLC optical branching device and passive enter house type optical receiving device；The light of described erbium and ytterbium codoping image intensifer goes out end by light
Fine and described the light input end boring high-power input optical branching device is drawn to be connected, the described cone high-power input optical branching device of drawing
Light output end is connected with described PLC optical branching device by optical fiber, and the light output end of described PLC optical branching device passes through light
Fine and described passive enter house type photoreceiver light input end be connected.
In passive fiber transmission access system described in the utility model, the output work of described erbium and ytterbium codoping image intensifer
Rate is 26dbm～40dbm.
In passive fiber transmission access system described in the utility model, described erbium and ytterbium codoping image intensifer is for by defeated
The 1550nm optical signal amplification entering is to intended power output.
In passive fiber transmission access system described in the utility model, described passive enter house type optical receiving device for
The 1550nm optical signal of described PLC optical branching device distribution is converted to RF signal.
The beneficial effects of the utility model are: by erbium and ytterbium codoping image intensifer, draw the high-power input optical branching device of cone,
PLC optical branching device and passive enter house type optical receiving device constitute passive fiber transmission access system, with existing active family
The access network constituting with optical receiving device is compared, erbium and ytterbium codoping image intensifer and draw the high-power input light branch of cone all to concentrate
At branch center machine room, and end of registering one's residence does not uses power supply adaptor, has energy-conserving and environment-protective, safe and reliable and cost is relatively low
Advantage.
Brief description
Fig. 1 is the structure chart showing passive fiber transmission access system in an illustrative manner.
Fig. 2 is to show erbium and ytterbium codoping image intensifer in an illustrative manner and draw the high-power input optical branching device of cone to arrange
Access the structure chart of machine room in branch center.
Detailed description of the invention
In conjunction with shown in Fig. 1, the passive fiber transmission access system that the present embodiment proposes includes: erbium and ytterbium codoping image intensifer
11st, draw high-power input optical branching device the 12nd, the PLC optical branching device 13 of cone and passive enter house type optical receiving device 14；Erbium
The light output end that ytterbium is co-doped with image intensifer 11 is connected with drawing the light input end boring high-power input optical branching device 12 by optical fiber
Connect, draw the light output end boring high-power input optical branching device 12 to be connected with PLC optical branching device 13 by optical fiber, PLC
The light output end of optical branching device 13 by optical fiber with passive enter house type photoreceiver 14 light input end be connected.
In an alternative embodiment, the power output of erbium and ytterbium codoping image intensifer 11 is 26dbm～40dbm.
In an alternative embodiment, erbium and ytterbium codoping image intensifer 11 is for by the 1550nm optical signal amplification of input extremely
Intended power output.
In an alternative embodiment, passive enter house type optical receiving device 14 for distributing PLC optical branching device 13
1550nm optical signal is converted to RF signal.
In conjunction with shown in Fig. 2, the course of work of the passive fiber transmission access system that this detailed description of the invention proposes includes:
Branch center access machine room 21, the 1550nm optical signal being sent by front end (signal strength signal intensity typically-3dBm～
The scope of 10dBm) it is input to erbium and ytterbium codoping image intensifer 11；This 1550nm light is believed by erbium and ytterbium codoping image intensifer 11
It number is amplified to 32dBm (as a example by 32dBm light is put), then by drawing the high-power input optical branching device 12 of cone (defeated
Enter luminous power be more than 5W) will amplify after 1550nm optical signal be divided into 8 tunnels, 16 roads or 32 road optical signals；When
When every road optical signal is less than 26dBm, can further according to design need to connect PLC optical branching device 13 (4 tunnels, 8 tunnels,
16 roads or 32 tunnels)；Finally by passive enter house type optical receiving device 14 1550nm optical signal be assigned to each use
Family end.
Wherein, PLC optical branching device 13 can use the structure of multistage connection, makes the received optical power of user side exist
In the range of-12d8m～+4dBm, PLC optical branching device 13 can be distributed by passive family expenses optical receiving device 14
1550nm optical signal is converted to RF signal (general output level is 42dBuv～74dBuv).
Use the technical scheme that the present embodiment proposes, by erbium and ytterbium codoping image intensifer, draw the high-power input light branch of cone
Device, PLC optical branching device and passive enter house type optical receiving device constitute passive fiber transmission access system, have with existing
The access network that source family expenses optical receiving device is constituted is compared, erbium and ytterbium codoping image intensifer and draw the high-power input light branch of cone equal
Concentrate on branch center machine room, and end of registering one's residence does not uses power supply adaptor, has energy-conserving and environment-protective, safe and reliable and cost
Relatively low advantage.
This detailed description of the invention is to be clearly and completely described the technical solution of the utility model, enforcement therein
Example is only a part of embodiment of the present utility model, and is not whole embodiments.Based in the utility model
Embodiment, all other embodiment that those skilled in the art are obtained on the premise of not through creative work
Broadly fall into protection domain of the present utility model.
Claims (4)
1. a passive fiber transmission access system, it is characterised in that include: erbium and ytterbium codoping image intensifer, draw cone
High-power input optical branching device, PLC optical branching device and passive enter house type optical receiving device；Described erbium and ytterbium codoping light amplification
The light of device go out end by optical fiber with described draw bore high-power input optical branching device light enter hold be connected, described draw bore high-power
The light output end of input optical branching device is connected with described PLC optical branching device by optical fiber, described PLC optical branching device
Light output end by optical fiber with described passive enter house type photoreceiver light input end be connected.
2. passive fiber transmission access system as claimed in claim 1, it is characterised in that described erbium and ytterbium codoping light
The power output of amplifier is 26dbm～40dbm.
3. passive fiber transmission access system as claimed in claim 2, it is characterised in that described erbium and ytterbium codoping light
The 1550nm optical signal amplification that amplifier is used for inputting is to intended power output.
4. passive fiber transmission access system as claimed in claim 3, it is characterised in that described passive enter house type
Optical receiving device is for being converted to RF signal by the 1550nm optical signal of described PLC optical branching device distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620324340.4U CN205725759U (en) | 2016-04-18 | 2016-04-18 | A kind of passive fiber transmission access system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620324340.4U CN205725759U (en) | 2016-04-18 | 2016-04-18 | A kind of passive fiber transmission access system |
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| Publication Number | Publication Date |
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| CN205725759U true CN205725759U (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620324340.4U Active CN205725759U (en) | 2016-04-18 | 2016-04-18 | A kind of passive fiber transmission access system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109782406A (en) * | 2019-03-19 | 2019-05-21 | 浙江中特互联科技有限公司 | A kind of highly dense type min-size optical splitter |
-
2016
- 2016-04-18 CN CN201620324340.4U patent/CN205725759U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109782406A (en) * | 2019-03-19 | 2019-05-21 | 浙江中特互联科技有限公司 | A kind of highly dense type min-size optical splitter |
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