CN104049318A - Four-port OLT optical transmit-receive integrated module - Google Patents
Four-port OLT optical transmit-receive integrated module Download PDFInfo
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- CN104049318A CN104049318A CN201310079382.7A CN201310079382A CN104049318A CN 104049318 A CN104049318 A CN 104049318A CN 201310079382 A CN201310079382 A CN 201310079382A CN 104049318 A CN104049318 A CN 104049318A
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Abstract
The invention provides a four-port OLT optical transmit-receive integrated module which comprises a light transmitting device for transmitting a downlink first optical signal; a light receiving device for receiving an uplink second optical signal, wherein the light receiving device comprises an APD light receiving assembly, a limiting amplifier, a boost circuit, a current mirror image circuit and a received light signal intensity indicator circuit; a wave combination and division planar optical waveguide device; and a multifiber plugging connector. The wave combination and division planar optical waveguide device divides the downlink first optical signal into four paths and the four paths of signals are output through the multifiber plugging connector; each path of output optical signal is downwardly transmitted in a broadcast manner to an ONU terminal; the time division multiplexing four-path uplink second optical signals which are input by the multifiber plugging connector and are from the ONU terminal are coupled, received and converted into electric signals through the wave combination and division planar optical waveguide device and the APD light receiving assembly, and the electric signals are amplified by the limiting amplifier and then are output. According to the integrated module, since the same-standard SFP mechanical size packaging is utilized, four OLT bidirectional optical signal transmission capability is provided.
Description
Technical field
The present invention relates to optical line terminal OLT (Optical Line Terminal, be called for short OLT) use integrated module of optical transceiver SFP (Small Form Pluggable, be called for short SFP), relate in particular to the four port OLT integrated modules of optical transceiver that GPON (gigabit passive optical network) system is used.
Background technology
In recent years, passive optical network PON (Passive Opitcal Network) technology was because the superiority of high access bandwidth is rapidly developed, especially GPON technology.As shown in Figure 1 in PON system, optical line terminal OLT 1 is in local side, optical network unit (Optical Network Unit is called for short ONU)) in client, OLT1 end adopts burst-mode receiver ONU end uplink optical signal, and its operation wavelength is 1310mn; OLT1 end comes downwards to the light signal of each ONU end to be launched continuously by a 1XN optical branching device broadcast type, its operation wavelength 1490nm.The light signal processing of the OLT1 integrated module of optical transceiver of the prior art is the single fiber transmitted in both directions assembly BOSA(Bi-direction Optical Sub-assembly being made up of laser assembly, optical fiber receive module, single fiber and wavelength division multiplexer) complete, laser assembly is launched a downlink optical signal, optical fiber receive module receives uplink optical signal, descending, upper light signal is respectively by after wavelength division multiplexer transmission, reflection, by the two-way output of single fiber, input light signal separately.Its output terminal of this structure OLT1 integrated module of optical transceiver is supported at most 32 ONU terminal users, if need the network capacity extension to access more ONU user, and can only be by increasing more OLT1 modules.
Summary of the invention
The invention provides the four port OLT integrated modules of optical transceiver of a kind of network capacity extension convenience, compact conformation.
For reaching above goal of the invention, the invention provides a kind of four port OLT integrated modules of optical transceiver, comprising: a light emitting devices is used for launching descending the first light signal; One optical pickup apparatus is used for receiving up the second light signal, and this device comprises: an APD optical fiber receive module, a limiting amplifier, a booster circuit, a current mirror circuit and a receiving optical signals strength indicating circuit; One closes wave separater planar optical waveguide device and the umbilical connector of optical fiber more than one; By the input of described many optical fiber umbilical connector from up second light signal in time-multiplexed four tunnels of ONU end through described in close wave separater planar optical waveguide device and the coupling of described APD optical fiber receive module and receive and be converted to electric signal and amplify and export by limiting amplifier, booster circuit is setovered for APD optical fiber receive module provides high direct voltage, and current mirror circuit is for detecting burst luminous signal intensity by photocurrent mirror image to receiving optical signals strength indicating circuit.
Described light emitting devices, comprise: one first laser driver drives one first laser assembly to launch descending the first light signal, described in close wave separater planar optical waveguide device and will behind described descending the first light signal Yi Fen tetra-tunnels, be exported by described many optical fiber umbilical connector.
Described light emitting devices, also comprises that a second laser driver drives one second laser assembly launches descending the 3rd light signal; One 1X2 fan out buffer is for being converted to two-way by a pair of differential signal, input to respectively described first, second laser driver, close wave separater planar optical waveguide device and exported by many optical fiber umbilical connector behind descending first, the 3rd light signal one-to-two road respectively.
Described many optical fiber umbilical connector is a MPO or a MTP connector.
Described optical pickup apparatus, also comprise a data buffer and a burst packets testing circuit, described data buffer is isolated the impact of described limiting amplifier output signal on mainboard, and whether described burst packets testing circuit receives light signal for detection of APD optical fiber receive module.
Described descending first, the 3rd wavelength of optical signal is 1490nm wave band, and described up the second wavelength of optical signal is 1310nm wave band.
Due to the four port OLT integrated modules of optical transceiver of said structure, adopt one to close wave separater planar optical waveguide device and downlink optical signal is processed to Hou Fen tetra-road light signals outwards export by many optical fiber umbilical connector, each road light signal after output sends downlink optical signal by broadcast type to ONU end again, meanwhile, receive and be converted to electric signal output by APD optical fiber receive module after closing the processing of wave separater planar optical waveguide device by many optical fiber umbilical connector input Si road uplink optical signal.In technique scheme owing to utilizing SFP integrated module of optical transceiver standard mechanical package dimension that the function of 4 conventional OLT integrated modules of optical transceiver is provided, be equivalent to original four times of functions, operator can save equipment plate card and rack resource while arranging the network capacity extension, and networking wiring is simple, the relatively low advantage of integrated cost.
Brief description of the drawings
Fig. 1 represents the PON schematic network structure that adopts common OLT module to set up;
Fig. 2 represents the present invention's four port OLT integrated module of optical transceiver the first embodiment frame principle figures;
Fig. 3 represents the present invention's four port OLT integrated module of optical transceiver the second embodiment frame principle figures;
Four port OLT integrated module of optical transceiver PON application schematic diagram shown in Fig. 4 presentation graphs 2 and Fig. 3.
Embodiment
Describe most preferred embodiment of the present invention in detail below in conjunction with accompanying drawing.
The four port OLT integrated modules of optical transceiver as shown in Figure 2, comprise: a light emitting devices 10 is for launching descending the first light signal, this device can adopt two schemes, the first situation, comprise: one first laser driver 11 drives one first laser assembly 12 to launch descending the first light signal, when now the power of laser driver meets requiring of a certain size, one just passable; The second situation, in the time adopting the laser driver of common power size, also needs to comprise that a second laser driver 13 drives a second laser assembly 14 to launch descending the 3rd light signal; One 1X2 fan out buffer 15, for a pair of differential signal is converted to two-way, inputs to respectively first, second laser driver 11,13.One optical pickup apparatus 20 is for receiving up the second light signal, and this device comprises: an APD optical fiber receive module 21, a limiting amplifier 22, a booster circuit 23, a current mirror circuit 24 and a receiving optical signals strength indicating circuit 25; One closes wave separater planar optical waveguide device 30 and the umbilical connector of optical fiber more than one 40, and this connector can adopt MPO or a MTP connector of a standard.In the time that light emitting devices 10 adopts the first scheme to be a laser instrument, close wave separater planar optical waveguide device 30 and will behind descending the first light signal Yi Fen tetra-tunnels, be exported by many optical fiber umbilical connector 40; In the time that light emitting devices 10 adopts first scheme to be two laser instruments, closing wave separater planar optical waveguide device 30 is exported by many optical fiber umbilical connector 40 behind descending first, the 3rd light signal one-to-two road respectively, utilize the power of two laser instruments to superpose to make up the optical path loss that the light splitting of PLC planar optical waveguide brings, all standard compliant optical power signals of Shi Si road output.Simultaneously, inputted to be coupled to receive from the up second light signal ECDC wave separater planar optical waveguide device 30 in time division multiplex four tunnels of ONU end and APD optical fiber receive module 21 by many optical fiber umbilical connector 40 and be converted to electric signal and amplify output by limiting amplifier 22, booster circuit 23 is setovered for APD optical fiber receive module 21 provides high direct voltage, and current mirror circuit 24 is for detecting burst luminous signal intensity by photocurrent mirror image to receiving optical signals strength indicating circuit 25.As shown in Figure 3, optical pickup apparatus 20, can also comprise a data buffer 50 and a burst packets testing circuit 60, data buffer 50 is isolated the impact of limiting amplifier 22 output signals on mainboard, also play the effect of data shaping, whether burst packets testing circuit 60 receives light signal for detection of APD optical fiber receive module 21.Descending first or the 3rd wavelength of optical signal be 1490nm wave band, up the second wavelength of optical signal is 1310nm wave band, certainly also can use laser assembly and the APD optical fiber receive module of other wave band according to practical application, the wavelength that simultaneously closes wave separater planar optical waveguide device 30 also will do corresponding adjustment, such as may be also 1577nm and 1270nm.Adopt any light emitting devices 10 no matter be, export Si road light signal by many optical fiber umbilical connector 40 and all can adopt respectively broadcast type downlink transfer to hold to ONU, therefore, adopt four port OLT integrated modules of optical transceiver, can access nearly 128 ONU network users, as shown in Figure 4.The present invention, because the same standard SFP of employing mechanical dimension encapsulates the ability that 4 OLT transmitted in both directions light signals are provided, is equivalent to the splitting ratio of original four times, and operator can save equipment plate card and rack resource in the time disposing networking, and integrated cost is relatively low.
Claims (6)
1. four port OLT integrated modules of optical transceiver, is characterized in that, comprising: a light emitting devices (10) is for launching descending the first light signal; One optical pickup apparatus (20) is for receiving up the second light signal, and this device comprises: an APD optical fiber receive module (21), a limiting amplifier (22), a booster circuit (23), a current mirror circuit (24) and a receiving optical signals strength indicating circuit (25); One closes wave separater planar optical waveguide device (30) and the umbilical connector of optical fiber more than one (40); By described many optical fiber umbilical connector (40) input from up second light signal in time-multiplexed four tunnels of ONU end through described in close wave separater planar optical waveguide device (30) and described APD optical fiber receive module (21) coupling and receive and be converted to electric signal and amplify output by limiting amplifier (22), booster circuit (23) is setovered for APD optical fiber receive module (21) provides high direct voltage, and current mirror circuit (24) is for detecting burst luminous signal intensity by photocurrent mirror image to receiving optical signals strength indicating circuit (25).
2. the four port OLT integrated modules of optical transceiver according to claim 1, it is characterized in that, described light emitting devices (10), comprise: one first laser driver (11) drives one first laser assembly (12) to launch descending the first light signal, described in close wave separater planar optical waveguide device (30) and will behind described descending the first light signal Yi Fen tetra-tunnels, be exported by described many optical fiber umbilical connector (40).
3. the four port OLT integrated modules of optical transceiver according to claim 2, is characterized in that, described light emitting devices (10) also comprises that a second laser driver (13) drives a second laser assembly (14) to launch descending the 3rd light signal; One 1X2 fan out buffer (15) is for being converted to two-way by a pair of differential signal, input to respectively described first, second laser driver (11,13), close wave separater planar optical waveguide device (30) and exported by many optical fiber umbilical connector (40) behind descending first, the 3rd light signal one-to-two road respectively.
4. the four port OLT integrated modules of optical transceiver according to claim 3, is characterized in that, described many optical fiber umbilical connector (40) is a MPO or a MTP connector.
5. the four port OLT integrated modules of optical transceiver according to claim 4, it is characterized in that, described optical pickup apparatus (20), also comprise a data buffer (50) and a burst packets testing circuit (60), described data buffer (50) is isolated the impact of described limiting amplifier (22) output signal on mainboard, and whether described burst packets testing circuit (60) receives light signal for detection of APD optical fiber receive module (21).
6. according to the four port OLT integrated modules of optical transceiver described in claim 1,2,3,4 or 5, it is characterized in that, described descending first, the 3rd wavelength of optical signal is 1490nm wave band, and described up the second wavelength of optical signal is 1310nm wave band.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310079382.7A CN104049318A (en) | 2013-03-13 | 2013-03-13 | Four-port OLT optical transmit-receive integrated module |
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| CN201310079382.7A CN104049318A (en) | 2013-03-13 | 2013-03-13 | Four-port OLT optical transmit-receive integrated module |
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| CN106788775A (en) * | 2016-12-20 | 2017-05-31 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN106953697A (en) * | 2017-05-22 | 2017-07-14 | 福建亿芯源半导体股份有限公司 | The OLT transceiver chips of programmable analog |
| WO2023246503A1 (en) * | 2022-06-21 | 2023-12-28 | 华为技术有限公司 | Adapter and on-board optical interconnection system |
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Application publication date: 20140917 |