CN202077034U - OLT light transmit-receive integrated module - Google Patents
OLT light transmit-receive integrated module Download PDFInfo
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- CN202077034U CN202077034U CN2011202151614U CN201120215161U CN202077034U CN 202077034 U CN202077034 U CN 202077034U CN 2011202151614 U CN2011202151614 U CN 2011202151614U CN 201120215161 U CN201120215161 U CN 201120215161U CN 202077034 U CN202077034 U CN 202077034U
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Abstract
The utility model provides an OLT light transmit-receive integrated module, which comprises a single fiber two-way transmission light transmit-receive integrated device, an uplink signal detection intensity unit, a module microprocessor, an OLT power supply control circuit, an OTDR direct-current power supply and an OTDR control processing unit, wherein the single fiber two-way transmission light transmit-receive integrated device at least comprises a light emitter, a light receiver, a wavelength division multiplexing device and a single fiber; the module microprocessor, on one hand, is connected with the light emitter via the uplink signal detection intensity unit, and on the other hand, is connected with the OTDR direct-current power supply via the OLT power supply control circuit to charge the OTDR control processing unit; the OTDR control processing unit comprises an OTDR microprocessor, an OTDR signal generator, a receiving electric signal amplifying/shaping unit, an A/D converting unit, an operation unit, a storage unit and an I2C interface; and the OTDR signal generator is connected with the light emitter. The OTDR control processing unit can only be started when a fault exists in the fiber link, and when the network is normal, the OTDR is in a sleep state, thereby generating no power consumption.
Description
Technical field
The utility model relates to a kind of EPON (Passive Optical Network, PON is planted in letter) optical line terminal (the Optical Line Terminal that uses of system, OLT is planted in letter) the OLT integrated module of optical transceiver, relate in particular to a kind of optical time domain reflectometer OTDR(Optical Time-Domain Reflectometer that has, hereinafter to be referred as OTDR) the OLT integrated module of optical transceiver of function.
Background technology
The PON network system is made of the optical line terminal OLT (Optical Line Terminal) of local side, optical network unit ONU (Optical Network Unit is called for short ONU) and the ODN that connects these nodes.An OLT integrated module of optical transceiver transmitting downstream light signal is to a plurality of ONU, the uplink optical signal of each ONU is received by the OLT of local side, so, an OLT integrated module of optical transceiver comprises an optical transmitting set, an optical receiver, a WDM device and a single fiber at least, and single fiber is used for transmitted in both directions up-downgoing light signal.Along with popularizing and large-scale application of Fibre Optical Communication Technology, the maintenance of fiber optic network becomes a problem.Particularly develop rapidly, expand at the PON network, when forming large-scale application gradually, the maintenance issues of optical fiber cable comes out gradually, and has become one of main problem of restriction industry development.Compare with ADSL copper wire access technology, because signal transmission medium---the fibre core of optical fiber, it is glass that its material adopts silicon dioxide, and this material is relatively more fragile, is prone to fracture, and the judgement of breakpoint or reparation are more than the copper cash complexity.If copper cash fractures; the conduction that only need kink gets final product; can be if optical fiber fracture, only the breakpoints of optical fiber location determination just bothers very much, at first needs to send the technical staff to seek breakpoints of optical fiber; utilize the special inspecting equipment location; need then at the scene to carry out the fibre core welding and protective layer is handled, and the effect after repairing is how with optical fiber splicer, must be complicated by the field test thing; the service outage duration of whole network is longer in this process, causes the maintenance of network cost up.The OTDR detection technique is the most effective up to now breakpoints of optical fiber positioning equipment, during OTDR work, by launching light pulse signal in optical fiber, return the used time from launch point to the fault break point signal, again according to the propagation velocity of light in glass medium, just can calculate the breakpoints of optical fiber distance, thereby breakpoints of optical fiber is effectively located.Therefore additional integrated OTDR functional circuit has become a kind of trend in the OLT of the prior art integrated module of optical transceiver.If but only the OTDR circuit unit simply is integrated in the OLT integrated module of optical transceiver, promptly as long as module work, managed network fault whether not, the OTDR circuit unit will be in power-up state with whole module always, it is about 50% to cause the power consumption of the whole OLT integrated module of optical transceiver to increase, and has caused unnecessary waste.
The utility model content
For overcoming above shortcoming, the OLT integrated module of optical transceiver that the utility model provides a kind of low-power consumption to have the OTDR function.
For realizing above goal of the invention, the utility model provides a kind of OLT integrated module of optical transceiver, comprise the light transmit-receive integrated device of a single fiber transmitted in both directions, one upward signal detected intensity unit, one module microprocessor, one OLT power control circuit, an one OTDR DC power supply and an OTDR controlled processing unit, the light transmit-receive integrated device of described single fiber transmitted in both directions comprises an optical transmitting set at least, one optical receiver, one WDM device and a single fiber, a described optical transmitting set transmitting downstream light signal λ 1 and a fault detect light signal λ 1 ' export ONU and fiber failure point respectively to through described single fiber again after described WDM device transmission, the ONU uplink optical signal λ 2 of simultaneously described single fiber input and the described fault detect light signal λ 1 ' that returns by the fiber failure point reflection through described WDM device reflection back by described optical receiver reception and be converted to the uplink electrical signals and the fault detect signal of telecommunication respectively; Described module microprocessor connects the light transmit-receive integrated device of the described single fiber transmitted in both directions of control by described upward signal detected intensity unit on the one hand, and also connecting control OTDR DC power supply by the OLT power control circuit on the other hand is that described OTDR controlled processing unit powers on; Described OTDR controlled processing unit comprises an OTDR microprocessor and an OTDR signal generator, and the reception signal of telecommunication amplification/shaping unit, an A/D converting unit, an arithmetic element, a memory cell and the I that connect successively
2C interface; Described OTDR microprocessor connects the optical transmitting set of the light transmit-receive integrated device of described single fiber transmitted in both directions on the one hand by described OTDR signal generator, connect the described reception signal of telecommunication amplification/shaping unit of control, an A/D converting unit, an arithmetic element, a memory cell, an I on the other hand respectively
2C interface, the optical receiver of the light transmit-receive integrated device of described single fiber transmitted in both directions is connected control with described reception signal of telecommunication amplification/shaping unit.
The light transmit-receive integrated device of described single fiber transmitted in both directions comprises an optical transmitting set, first, second optical receiver.
The speed of a described downlink optical signal λ 1 and a fault detect light signal λ 1 ' is respectively 2.5 Gbit/s, 5Mbit/s, and wavelength is 1490nm; Uplink optical signal λ 2 speed are 1.25 Gbit/s, and wavelength is 1310 nm.
The speed of a described downlink optical signal λ 1 and a fault detect light signal λ 1 ' is respectively 10 Gbit/s, 5Mbit/s, and wavelength is 1577nm; Described uplink optical signal λ 2 speed are 2.5 Gbit/s, and wavelength is 1270nm.
The light transmit-receive integrated device of described single fiber transmitted in both directions comprises first, second optical transmitting set and first, second optical receiver.
Described downlink optical signal λ 1 speed is that 2.5 Gbit/s, wavelength are 1490nm, and described fault detect light signal λ 1 ' wavelength is 1610 nm, and described uplink optical signal λ 2 speed are 1.25 Gbit/s, and wavelength is 1310nm.
Described downlink optical signal speed is that 10 Gbit/s, wavelength X 1 are 1577nm; Described fault detect light signal λ 1 ' wavelength is 1610 nm; Described uplink optical signal λ 2 speed are 2.5 Gbit/s, and wavelength is 1270nm.
The said structure OLT integrated module of optical transceiver, because module is provided with upward signal detected intensity unit, when network just often, the optical transmitting set transmitting downstream light signal λ 1 to ONU of the light transmit-receive integrated device 10 of single fiber transmitted in both directions receives, and the optical receiver reception by light transmit-receive integrated device 10 after ONU uplink optical signal λ 2 is imported by single fiber is converted to signal of telecommunication output.In case optical fiber link breaks down, the optical receiver weak output signal of the light transmit-receive integrated device 10 of single fiber transmitted in both directions, this moment, module microprocessor will be by OLT power control circuit control OTDR DC power supply, make it provide power Vcc to the OTDR controlled processing unit, start the OTDR signal generator, make descending fault detect light signal λ of optical transmitting set emission 1 ' of the light transmit-receive integrated device 10 of single fiber transmitted in both directions arrive the single fiber fault point, the fault detect light signal λ 1 ' that the fiber failure point reflection is returned is converted to the fault detect signal of telecommunication by the optical receiver reception after the WDM device reflection, this signal is under the control of OTDR microprocessor, successively by receiving signal of telecommunication amplification/shaping unit, the A/D converting unit, arithmetic element 63, memory cell 64 passes through I at last
2C interface to system's output report, is determined the optical fiber link breakpoint location with the fault-signal data.Hence one can see that, the OTDR controlled processing unit of the OLT integrated module of optical transceiver only starts at the optical fiber link Shi Caihui that breaks down, do not work at ordinary times, like this, the common OLT integrated module of optical transceiver is inner integrated after the OTDR functional module, and network just often OTDR function is in sleep state, can not produce power consumption, only just start when the optical fiber link fault, the optical fiber link fault detect is flexible, easy.
Description of drawings
Fig. 1 represents the utility model OLT integrated module of optical transceiver circuit theory block diagram.
Fig. 2 represents light transmit-receive integrated device first embodiment of single fiber transmitted in both directions shown in Figure 1.
Fig. 3 represents light transmit-receive integrated device second embodiment of single fiber transmitted in both directions shown in Figure 1.
Embodiment
Describe the utility model most preferred embodiment in detail below in conjunction with accompanying drawing.
By the OLT integrated module of optical transceiver shown in Figure 1, comprise the light transmit-receive integrated device 10 of a single fiber transmitted in both directions, a upward signal detected intensity unit 20, a module microprocessor 30, an OLT power control circuit 40, an OTDR DC power supply 50 and an OTDR controlled processing unit 60.The light transmit-receive integrated device 10 of single fiber transmitted in both directions comprises an optical transmitting set, an optical receiver, a WDM device and a single fiber at least, an optical transmitting set transmitting downstream light signal λ 1 and a fault detect light signal λ 1 ' export ONU and fiber failure point respectively to through single fiber again after the WDM device transmission, the ONU uplink optical signal λ 2 of single fiber input simultaneously and the fault detect light signal λ 1 ' that returns by the fiber failure point reflection through WDM device reflection back by the optical receiver reception and be converted to the uplink electrical signals and the fault detect signal of telecommunication respectively.Module microprocessor 30 connects the light transmit-receive integrated device 10 of control single fiber transmitted in both directions by upward signal detected intensity unit 20 on the one hand, also connects control OTDR DC power supply 50 by OLT power control circuit 40 on the other hand and powers on for OTDR controlled processing unit 60.OTDR controlled processing unit 60 comprises an OTDR microprocessor 66 and an OTDR signal generator 67, and the reception signal of telecommunication amplification/shaping unit 61, an A/D converting unit 62, an arithmetic element 63, a memory cell 64 and the I that connect successively
2C interface 65; OTDR microprocessor 66 connects the optical transmitting set of the light transmit-receive integrated device 10 of single fiber transmitted in both directions on the one hand by OTDR signal generator 67, connect control on the other hand respectively and receive signal of telecommunication amplification/shaping unit 61, an A/D converting unit 62, an arithmetic element 63, a memory cell 64, an I
2C interface 65, the optical receiver of the light transmit-receive integrated device 10 of single fiber transmitted in both directions is connected control with reception signal of telecommunication amplification/shaping unit 61.
The first kind of light transmit-receive integrated device of single fiber transmitted in both directions 10A as shown in Figure 2, be provided with an optical transmitting set LD, one first, the second optical receiver PD1, PD2, one WDM device and a single fiber, this WDM device comprises two WDM wavelength division multiplexing filter plates, optical-fiber network just often, optical transmitting set LD only transmitting downstream light signal λ 1 exports the ONU reception through the WDM device transmission to by single fiber, ONU uplink optical signal λ 2 is converted to uplink electrical signals output by the single fiber input after one of them WDM wavelength division multiplexing filter plate reflection back of WDM device is received by the first optical receiver PD1, do not start the OTDR controlled processing unit this moment, and this circuit is in sleep state.When optical fiber link breaks down, because the light signal that the first optical receiver PD1 receives is faint, this moment, module microprocessor 30 will be by OLT power control circuit 40 control OTDR DC power supply 50, make it provide power Vcc to OTDR controlled processing unit 60, start OTDR signal generator 67, make optical transmitting set LD launch a descending fault detect light signal λ 1 ' at this moment and arrive the fiber failure point, the fault detect light signal λ 1 ' that the fiber failure point reflection is returned is converted to the fault detect signal of telecommunication by second optical receiver PD2 reception after the WDM device reflection, this signal is under 66 controls of OTDR microprocessor, amplify shaping by receiving signal of telecommunication amplification/shaping unit 61 successively, the conversion of A/D converting unit 62 analog digitals, after digital signal after arithmetic element 63 will be changed is carried out computing, by memory cell 64 storages, pass through I at last
2C interface with the fault-signal data to System Reports output optical fibre position of failure point.Among this embodiment, for the OLT integrated module of optical transceiver that the GPON network system is used, the speed of a downlink optical signal λ 1 and a fault detect light signal λ 1 ' is respectively 2.5 Gbit/s, 5Mbit/s, and wavelength is 1490nm; Uplink optical signal λ 2 speed are 1.25 Gbit/s, and wavelength is 1310 nm.For the OLT integrated module of optical transceiver that the NGPON network system is used, the speed of a downlink optical signal λ 1 and a fault detect light signal λ 1 ' is respectively 10 Gbit/s, 5Mbit/s, and wavelength is 1577nm; Uplink optical signal λ 2 speed are 2.5 Gbit/s, and wavelength is 1270nm.
The second kind of light transmit-receive integrated device of single fiber transmitted in both directions 10B as shown in Figure 3, comprise one first, second optical transmitting set and one first, second optical receiver and a WDM device, this WDM device comprises three WDM wavelength division multiplexing filter plates, optical-fiber network just often, the first optical transmitting set LD1 transmitting downstream light signal λ 1 exports ONU through the WDM device transmission to by single fiber and receives, ONU uplink optical signal λ 2 is received by the first optical receiver PD1 by single fiber input back and is converted to uplink electrical signals output, do not start the OTDR controlled processing unit this moment, and this circuit is in sleep state.When optical fiber link breaks down, because the light signal that the first optical receiver PD1 receives is faint, this moment, module microprocessor 30 will be by OLT power control circuit 40 control OTDR DC power supply 50, make it provide power Vcc to OTDR controlled processing unit 60, start OTDR signal generator 67, make descending fault detect light signal λ of second optical transmitting set LD2 emission 1 ' arrive the fiber failure point, the fault detect light signal λ 1 ' that the fiber failure point reflection is returned is converted to the fault detect signal of telecommunication by second optical receiver PD2 reception after the WDM device reflection, this signal is under 66 controls of OTDR microprocessor, amplify shaping by receiving signal of telecommunication amplification/shaping unit 61 successively, the conversion of A/D converting unit 62 analog digitals, after digital signal after arithmetic element 63 will be changed is carried out computing, by memory cell 64 storages, pass through I at last
2C interface with the fault-signal data to System Reports output optical fibre position of failure point.Among this embodiment, for GPON OLT module, described downlink optical signal λ 1 speed is that 2.5 Gbit/s, wavelength are 1490nm, and described fault detect light signal λ 1 ' wavelength is 1610 nm, described uplink optical signal λ 2 speed are 1.25 Gbit/s, and wavelength is 1310nm.For NGPON OLT module, described downlink optical signal speed is that 10 Gbit/s, wavelength X 1 are 1577nm; Described fault detect light signal λ 1 ' wavelength is 1610 nm; Described uplink optical signal λ 2 speed are 2.5 Gbit/s, and wavelength is 1270nm.
Claims (7)
1. OLT integrated module of optical transceiver, it is characterized in that, comprise the light transmit-receive integrated device of a single fiber transmitted in both directions, one upward signal detected intensity unit, one module microprocessor, one OLT power control circuit, an one OTDR DC power supply and an OTDR controlled processing unit, the light transmit-receive integrated device of described single fiber transmitted in both directions comprises an optical transmitting set at least, one optical receiver, one WDM device and a single fiber, a described optical transmitting set transmitting downstream light signal λ 1 and a fault detect light signal λ 1 ' export ONU and fiber failure point respectively to through described single fiber again after described WDM device transmission, the ONU uplink optical signal λ 2 of simultaneously described single fiber input and the described fault detect light signal λ 1 ' that returns by the fiber failure point reflection through described WDM device reflection back by described optical receiver reception and be converted to the uplink electrical signals and the fault detect signal of telecommunication respectively; Described module microprocessor connects the light transmit-receive integrated device of the described single fiber transmitted in both directions of control by described upward signal detected intensity unit on the one hand, and also connecting control OTDR DC power supply by the OLT power control circuit on the other hand is that described OTDR controlled processing unit powers on; Described OTDR controlled processing unit comprises an OTDR microprocessor and an OTDR signal generator, and the reception signal of telecommunication amplification/shaping unit, an A/D converting unit, an arithmetic element, a memory cell and the I that connect successively
2C interface; Described OTDR microprocessor connects the optical transmitting set of the light transmit-receive integrated device of described single fiber transmitted in both directions on the one hand by described OTDR signal generator, connect the described reception signal of telecommunication amplification/shaping unit of control, an A/D converting unit, an arithmetic element, a memory cell, an I on the other hand respectively
2C interface, the optical receiver of the light transmit-receive integrated device of described single fiber transmitted in both directions is connected control with described reception signal of telecommunication amplification/shaping unit.
2. the OLT integrated module of optical transceiver according to claim 1 is characterized in that, the light transmit-receive integrated device of described single fiber transmitted in both directions comprises an optical transmitting set, first, second optical receiver.
3. the OLT integrated module of optical transceiver according to claim 2 is characterized in that, the speed of a described downlink optical signal λ 1 and a fault detect light signal λ 1 ' is respectively 2.5 Gbit/s, 5Mbit/s, and wavelength is 1490nm; Uplink optical signal λ 2 speed are 1.25 Gbit/s, and wavelength is 1310 nm.
4. the OLT integrated module of optical transceiver according to claim 2 is characterized in that, the speed of a described downlink optical signal λ 1 and a fault detect light signal λ 1 ' is respectively 10 Gbit/s, 5Mbit/s, and wavelength is 1577nm; Described uplink optical signal λ 2 speed are 2.5 Gbit/s, and wavelength is 1270nm.
5. the OLT integrated module of optical transceiver according to claim 1 is characterized in that, the light transmit-receive integrated device of described single fiber transmitted in both directions comprises first, second optical transmitting set and first, second optical receiver.
6. the OLT integrated module of optical transceiver according to claim 5, it is characterized in that, described downlink optical signal λ 1 speed is that 2.5 Gbit/s, wavelength are 1490nm, described fault detect light signal λ 1 ' wavelength is 1610 nm, described uplink optical signal λ 2 speed are 1.25 Gbit/s, and wavelength is 1310nm.
7. the OLT integrated module of optical transceiver according to claim 5 is characterized in that, described downlink optical signal speed is that 10 Gbit/s, wavelength X 1 are 1577nm; Described fault detect light signal λ 1 ' wavelength is 1610 nm; Described uplink optical signal λ 2 speed are 2.5 Gbit/s, and wavelength is 1270nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202151614U CN202077034U (en) | 2011-06-23 | 2011-06-23 | OLT light transmit-receive integrated module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202151614U CN202077034U (en) | 2011-06-23 | 2011-06-23 | OLT light transmit-receive integrated module |
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| CN202077034U true CN202077034U (en) | 2011-12-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457658A (en) * | 2012-05-30 | 2013-12-18 | 美国博通公司 | Passive optical fiber plant analysis |
| CN104205676A (en) * | 2012-07-02 | 2014-12-10 | 华为技术有限公司 | Optical line terminal, optical transceiver module, system, and fiber detection method |
-
2011
- 2011-06-23 CN CN2011202151614U patent/CN202077034U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457658A (en) * | 2012-05-30 | 2013-12-18 | 美国博通公司 | Passive optical fiber plant analysis |
| CN103457658B (en) * | 2012-05-30 | 2016-06-08 | 美国博通公司 | Optical line terminal olt |
| CN104205676A (en) * | 2012-07-02 | 2014-12-10 | 华为技术有限公司 | Optical line terminal, optical transceiver module, system, and fiber detection method |
| CN104205676B (en) * | 2012-07-02 | 2016-12-14 | 华为技术有限公司 | Optical line terminal, optical transceiver module, system and optical fiber detecting method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170531 Address after: 518101, Guangdong, Shenzhen Baoan District Xian two road COFCO Business Park 2, 1503 Patentee after: Shenzhen Apat Optoelectronics Components Co., Ltd. Address before: South South technology twelve road 518057 in Guangdong Province, Shenzhen high tech Industrial Park, No. 8 Frestech. Patentee before: Shenzhen Neo Photonic Technology Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111214 |