CN102761366A - Optical line terminal optical terminal used in 10 Gigabit passive optical network - Google Patents
Optical line terminal optical terminal used in 10 Gigabit passive optical network Download PDFInfo
- Publication number
- CN102761366A CN102761366A CN2012102378839A CN201210237883A CN102761366A CN 102761366 A CN102761366 A CN 102761366A CN 2012102378839 A CN2012102378839 A CN 2012102378839A CN 201210237883 A CN201210237883 A CN 201210237883A CN 102761366 A CN102761366 A CN 102761366A
- Authority
- CN
- China
- Prior art keywords
- optical
- signal
- telecommunication
- filter
- laser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Optical Communication System (AREA)
Abstract
The invention discloses an optical line terminal optical terminal used in a 10 Gigabit passive optical network. The optical module comprises a first laser emitter, a first laser detector, a second laser emitter, a second laser detector and a breakpoint detection module. The first laser emitter is used for receiving an electric signal input by a device, converting the received electric signal into an optical signal with first wavelength, and outputting the optical signal; the first laser detector is used for receiving the optical signal with second wavelength, converting the optical signal into the electric signal, and outputting the electric signal to the device; the second laser emitter is used for emitting the optical signal with third wavelength; the second laser detector is used for receiving the emitted optical signal with third wavelength, converting the received optical signal into the electric signal, and outputting the electric signal; and the breakpoint detection module is used for sampling and analyzing the electric signal output by the second laser detector so as to determine the optical fiber breakpoint position. Since the second laser emitter and the second laser detector also can perform the breakpoint detection work when the first laser emitter and the second laser emitter are in optical signal communication, an optical fiber network system is not needed to be cut off, and the regular transmission of the signals in the networks without breakpoint can be guaranteed.
Description
Technical field
The present invention relates to Fibre Optical Communication Technology, relate in particular to a kind of optical line terminal optical module that is applied in ten gigabit passive optical networks.
Background technology
In optical fiber telecommunications system; The transmission medium of light; Like optical fiber/optical cable, often be laid on countryside or seabed, problems such as link failure or transmission equipment fault appear unavoidably; In order accurately to locate the perhaps position of breakpoint of breaking down, adopt optical time domain reflectometer (OTDR) to carry out breakpoint usually and detect.
In ten gigabit passive optical networks as shown in Figure 1; OLT (Optical Line Terminator; Optical line terminal) is arranged on the central office of the access net system of optical fiber telecommunications system usually; OLT is responsible for that the electrical signal data in the switch is converted into optical signal data and sends, and receives the outside light signal that sends, and is translated into the signal of telecommunication and flows to switch.OLT links to each other with ONU (optical net unit, optical network unit) through ODN (light feeder network), and ONU is arranged on local side usually, i.e. user side or building; Splitter generally has 2N to divide equally port for " optical splitter ", if the light intensity of input port is 1, then the light intensity of each output port is 1/N.For a multi-plexing light accessing system, generally be that 1 OLT is placed on telecommunication center office, through optical splitter, generally be 1 minute 32 at least then, perhaps 1 minute 64 even 1 minutes 128, promptly 1 OLT was with 32 or 64 or 128 ONU.
Wherein, from OLT to spliter between, the long optical fiber of one section 10km is arranged, spliter is 1km to the distance between the ONU1, spliter is 2km to the distance between the ONU2, spilter is 10km to the distance between the ONU3.
Suppose at the 7km place fibercuts to have taken place to the optical fiber between the ONU3 at spilter; The sketch map of the breakpoint detection method of prior art is as shown in Figure 2: break off being connected between OLT and the optical fiber; OTDR (Optical Time Domain Reflectometer, optical time domain reflectometer) is linked in the optical fiber telecommunications system.OTDR, receives the information of returning at the OTDR port then and analyzes in optical fiber through the emission light pulse.When light pulse is transmitted in optical fiber; Can produce scattering, reflection owing to character, connector, junction point, bending or other similar incident of optical fiber itself; Wherein the scattering of a part will turn back among the OTDR with reflection; The useful information that returns is measured by the detector of OTDR, and they are just as time on the diverse location in the optical fiber or curve segment.OTDR uses Rayleigh scattering and Fresnel reflection to characterize the characteristic of optical fiber.Rayleigh scattering is to form owing to light signal produces irregular scattering along optical fiber.OTDR just measures a part of scattered light of getting back to the OTDR port.These backscatter signals have just shown decay (loss/distance) degree that is caused by optical fiber.Fresnel reflection is the reflection of dispersing, and it is caused that by the individual point in the whole piece optical fiber these points are made up of the factor that causes reverse parameter to change.On these aspects, have very strong back-scattering light and be reflected.Therefore, OTDR utilizes the information of Fresnel reflection to be located by connecting some fibre-optic terminus or breakpoint.
The breakpoints of optical fiber detection method of prior art, the first parting system network of in the process of carrying out the breakpoint detection, having to connects OTDR then and detects, and testing process is complicated, makes that testing staff's testing is loaded down with trivial details.
And, also can have influence on the normal transmission of the signal of other network that does not have the breakpoint place between detection period.For example, in the above-mentioned example, only be that spilter to the optical fiber between the ONU3 fibercuts has taken place, yet between detection period because OLT is broken from network, thereby also caused the signal interruption of ONU1, ONU2.
Therefore, in sum, prior art in ten gigabit passive optical networks, carry out the method that breakpoints of optical fiber detects, in carrying out the breakpoint testing process, can have influence on the normal transmission of the signal of other network that does not have the breakpoint place; And testing process is complicated, makes that testing staff's testing is loaded down with trivial details.
Summary of the invention
Embodiments of the invention provide a kind of optical line terminal optical module and breakpoints of optical fiber detection method thereof that is applied in ten gigabit passive optical networks; With so that the breakpoints of optical fiber detection is more convenient in ten gigabit passive optical networks, do not have influence on the normal transmission of the signal of other fiber optic network that does not have the breakpoint place.
According to an aspect of the present invention, a kind of optical line terminal optical module that is applied in ten gigabit passive optical networks is provided, has comprised:
Optical path component, it links to each other with optical fiber;
Ce circuit is used for the signal of telecommunication that desampler is imported, and the signal of telecommunication that receives is carried out clock regeneration and data shaping, and the signal of telecommunication after the shaping is exported;
First generating laser communicates with said optical path component light path, exports behind the light signal that is used to receive the signal of telecommunication of said ce circuit output and be converted into first wavelength, after said optical path component coupling, gets into said optical fiber;
First laser detector communicates with said optical path component light path, is used to receive the light signal of second wavelength, outputs to said switch after being converted into the signal of telecommunication; Wherein, the light signal of second wavelength is transferred to first laser detector from said optical fiber through said optical path component;
Second generating laser communicates with said optical path component light path, is used to launch the light signal of three-wavelength; The light signal of three-wavelength gets into said optical fiber after said optical path component coupling;
Second laser detector communicates with said optical path component light path, is used to receive the light signal of the three-wavelength of reflection, and exports after converting the light signal that receives into the signal of telecommunication; The light signal of the three-wavelength of said reflection is transferred to second laser detector from said optical fiber through said optical path component;
The breakpoint detection module is used for the signal of telecommunication of second laser detector output is sampled, analyzed, and determines the breakpoints of optical fiber position.
After the second Laser emission implement body is used for carrying out the signal of telecommunication that breakpoint detects in being used to of receiving that said switch sends, be that the light signal of three-wavelength is launched with the electrical signal conversion that receives.
The breakpoint detection module obtains digital signal after specifically being used for the signal of telecommunication of second laser detector output sampled, and digital signal that obtains and signal under the normal condition of preserving are in advance compared, and determines breakpoint location.
The first Laser emission implement body comprises: EML transmitting illuminant and the drive circuit thereof of the 9.95328Gbps of 1577nm; And first wavelength be specially 1577nm; The drive circuit of the EML transmitting illuminant of the 9.95328Gbps of said 1577nm receives the signal of telecommunication of said ce circuit output; And,
The first laser acquisition implement body comprises: APD pick-up probe and the amplitude limiting amplifier circuit of the 2.488Gbps of 1270nm; And second wavelength be specially 1270nm.
The second Laser emission implement body comprises: OTDR DFB burst transmissions light source and the drive circuit thereof of 1625nm; And three-wavelength is specially 1625nm;
The second laser acquisition implement body comprises: the OTDR APD detector of 1625nm.
Said breakpoint detection module specifically comprises: gain circuitry, adc circuit, logic array circuit and MCU control circuit;
After said gain circuitry is used for the signal of telecommunication to second laser detector output and amplifies, be input to said adc circuit;
Said adc circuit is used for the signal of telecommunication of input is sampled, and stores the digital signal of sampling into said logic array circuit;
The signal that said logic array circuit is used under digital signal that said adc circuit is deposited in and the normal condition of storing in advance compares, and confirms the breakpoints of optical fiber position; And the output optical fibre breakpoint location is preserved in said MCU control circuit.
Said optical path component specifically comprises:
Coaxial type laser diode module TO-CAN1, filter F1, F2 and F3; Wherein, Encapsulated the Laser emission chip of EML transmitting illuminant of the 9.95328Gbps of first optical lens and said 1577nm among the TO-CAN1; The light signal of the light emitted chip output of the EML transmitting illuminant of the 9.95328Gbps of said 1577nm is after first optical lens penetrates, through the transmission of said filter F1, F2 and F3, coupled into optical fibres;
Coaxial type laser diode module TO-CAN2 and filter F5 wherein, have encapsulated the optical signal detection chip of APD pick-up probe of the 2.488Gbps of second optical lens and said 1270nm among the TO-CAN2; After importing second optical lens from the light signal of the 1270nm of said optical fiber input through the transmission of the reflection of said filter F3 and filter F5, warp second optical lens enters into the optical signal detection chip of APD pick-up probe of the 2.488Gbps of said 1270nm;
Coaxial type laser diode module TO-CAN3; Wherein encapsulated the Laser emission chip of the OTDR DFB burst transmissions light source of the 3rd optical lens and said 1625nm; The light signal that the Laser emission chip of the OTDRDFB burst transmissions light source of said 1625nm sends is after the 3rd optical lens penetrates; Through the reflection of said filter F2 and the transmission of filter F3, be coupled into said optical fiber;
Coaxial type laser diode module TO-CAN4 and filter F4; Wherein, Encapsulated the optical signal detection chip of the OTDR APD detector of the 4th optical lens and said 1625nm among the TO-CAN4, from the light signal of the 1625nm of said optical fiber input, through the transmission of said filter F3, F2; With the reflection of said filter F1, the transmission of said filter F4 is after the 4th optical lens enters into the optical signal detection chip of the OTDR APD detector of said 1625nm.
Wherein, The anti-reflection film of said filter F1 plating 1577nm and 1625nm increase anti-film, and it is arranged between TO-CAN1 and the optical fiber interface, and the center of F1 and first intersection point coincide; And F1 becomes 45 with the optical lens of TO-CAN1, becomes 45 with the optical lens of TO-CAN4; First intersection point refers to the intersection point of line of extended line and TO-CAN1 and the optical fiber interface of TO-CAN4;
The anti-reflection film of said filter F2 plating 1577nm, the transmission of 1625nm90% and 10% reflectance coating, it is arranged between TO-CAN1 and the optical fiber interface, and the center of F2 and second intersection point coincide, and F2 becomes 45 with the optical lens of TO-CAN3; Second intersection point refers to the intersection point of line of extended line and TO-CAN1 and the optical fiber interface of TO-CAN3;
The anti-reflection film of said filter F3 plating 1577nm, the anti-reflection film that increases anti-film and 1625nm of 1270nm, it is arranged between filter F2 and the optical fiber interface, and the center of F3 and the 3rd intersection point coincide, and F3 becomes 45 with the optical lens of TO-CAN2; Second intersection point refers to the intersection point of line of extended line and TO-CAN1 and the optical fiber interface of TO-CAN2;
The anti-reflection film of said filter F4 plating 1625nm, it is arranged between filter F1 and the TO-CAN4, and on the extended line that is centered close to TO-CAN4 of F4, and the optical lens of F4 and TO-CAN4 parallels;
The anti-reflection film of said filter F5 plating 1270nm, it is arranged between filter F3 and the TO-CAN2, and on the extended line that is centered close to TO-CAN2 of F5, and the optical lens of F5 and TO-CAN2 parallels.
Said optical module, its output pin are 30; Comprising:
Pin Tx_Dis_OTDR is in order to the enable signal of desampler control OTDR;
Pin Data_OTDR is in order to the signal of telecommunication that is used to carry out the breakpoint detection of desampler transmission;
Pin TD-and TD+ are in order to receive the communication signal of telecommunication of said switch input;
Pin RD-and RD+ are in order to the said switch output communication signal of telecommunication.
The embodiment of the invention is owing to not only be provided with first generating laser and first laser detector that is used to carry out optical signal communications in the optical line terminal optical module in being applied to ten gigabit passive optical networks; And; Also be provided with simultaneously and can be used for second generating laser and second laser detector that breakpoint detects; And can realize the transmitting-receiving of 4 road light signals through optical path component; Therefore, first generating laser and first laser detector are when carrying out optical signal communications, and second generating laser and second laser detector also can carry out the breakpoint testing.So; Use the optical line terminal optical module of the embodiment of the invention carrying out to break off optical fiber network system when breakpoints of optical fiber detects; And; When carrying out the breakpoint detection, first generating laser and first laser detector still can be worked, thereby can guarantee the normal transmission of the signal of the network that other does not have the breakpoint place.
Description of drawings
Fig. 1 is the optical fiber telecommunications system sketch map of prior art;
Fig. 2 is that the breakpoints of optical fiber of prior art detects sketch map;
Fig. 3 is the optical line terminal optical module internal structure circuit block diagram in ten gigabit passive optical networks that is applied to of the embodiment of the invention;
Fig. 4 is EML transmitting illuminant and the circuit diagram of drive circuit thereof of 9.95328Gbps of ce circuit, the 1577nm of the embodiment of the invention;
Fig. 5 is APD pick-up probe and the circuit diagram of amplitude limiting amplifier circuit of the 2.488Gbps of embodiment of the invention 1270nm;
Fig. 6 is OTDR DFB burst transmissions light source and the circuit diagram of drive circuit thereof of the 1625nm of the embodiment of the invention;
Fig. 7 is OTDR APD detector and the circuit diagram of breakpoint detection module of the 1625nm of the embodiment of the invention;
Fig. 8 is the integrated circuit sketch map that is applied to the optical line terminal optical module in ten gigabit passive optical networks of the embodiment of the invention;
Fig. 9 is a fibercuts sketch map in ten gigabit passive optical networks of the embodiment of the invention;
Figure 10,11 is the sketch map of the signal that receives of the OTDR APD detector of the embodiment of the invention;
Figure 12 is the optical path component internal structure sketch map of the embodiment of the invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below with reference to accompanying drawing and enumerate preferred embodiment, to further explain of the present invention.Yet, need to prove that many details of listing in the specification only are in order to make the reader to one or more aspects of the present invention a thorough understanding arranged, even if there are not these specific details also can realize these aspects of the present invention.
Terms such as " module " that the application uses, " system " are intended to comprise the entity relevant with computer, such as but not limited to hardware, firmware, combination thereof, software or executory software.For example, module can be, but be not limited in: the thread of the process of moving on the processor, processor, object, executable program, execution, program and/or computer.For instance, the application program of moving on the computing equipment can be a module with this computing equipment.One or more modules can be positioned at an executory process and/or thread, and module also can be on the computer and/or be distributed between two or more the computers.
In the technical scheme of the embodiment of the invention, the OTDR function is integrated in the optical module of OLT, and, realizes that the light signal of communication and the light signal that detects breakpoint transmit simultaneously in optical fiber through a kind of optical path component of receiving and dispatching 4 road light signals; Thereby when carrying out the breakpoint detection, needn't break off OLT again, it is more convenient to make that breakpoint detects, and does not have influence on the normal transmission of the signal of other network that does not have the breakpoint place.
Specify the technical scheme of the embodiment of the invention below in conjunction with accompanying drawing.The embodiment of the invention be applied to the optical line terminal optical module internal structure circuit block diagram in ten gigabit passive optical networks; As shown in Figure 3, comprising: first generating laser 301, first laser detector 302, second generating laser 303, second laser detector 304, breakpoint detection module 305, optical path component 306, ce circuit 307.
Be arranged on the signal of telecommunication that the switch of central office of the access net system of optical fiber telecommunications system transmits earlier through behind the ce circuit 307, be input to first generating laser 301.Because the electrical signal rate that switch transmits reaches 10Gbps, signal distortion is serious, so need CDR (Clock Data Recovery, clock and data recovery) circuit that signal is carried out shaping.SerDes (serializer/deserializer in ce circuit 307 desamplers; Or title switch) behind the signal of telecommunication that sends; The signal of telecommunication to receiving carries out clock regeneration and data shaping, and the signal of telecommunication after the shaping is outputed to first generating laser 301.
First generating laser 301 is in order to the signal of telecommunication with reception, and after the electric light conversion, the light signal that converts first wavelength into is launched.The light signal of first generating laser, 301 emissions enters into optical fiber and propagates after optical path component 306 couplings.
The second wavelength light signal of coming from Optical Fiber Transmission is behind the branch light action of optical path component 306, and the light signal of second wavelength is sent to first laser detector 302.The light signal of second wavelength that first laser detector 302 will receive after opto-electronic conversion, converts the signal of telecommunication into and sends to switch, and the SerDes of switch (switch) carries out data analysis.
Switch has realized that through first generating laser 301 and first laser detector 302 signal sends and the communication function that receives.That is to say that the signal of telecommunication that is used to communicate by letter that first generating laser, 301 desamplers send is converted into the light signal that is used to communicate by letter; First laser detector 302 receives the light signal that is used to communicate by letter, and is converted into the signal of telecommunication that is used to communicate by letter and sends to switch.
Second generating laser 303 is used to launch the light signal of three-wavelength, and the light signal of this three-wavelength is the light signal that is used to detect breakpoint.The light signal of the three-wavelength of second laser detector, 304 emissions enters into optical fiber and propagates after optical path component 306 couplings.The light signal of three-wavelength transmits in optical fiber; Be reflected at the breakaway poing of optical fiber or fault place or other place of equipment; The light signal of the three-wavelength that is reflected transmits in optical fiber; After turning back to optical path component 306, through the branch light action of optical path component 306, the light signal of the three-wavelength that is reflected back toward is sent to second laser detector 304.Particularly; The signal of telecommunication that is used to carry out the breakpoint detection that second generating laser, 303 desamplers send; And be the light signal of three-wavelength: (the Media Access Control of the MAC in the switch with the electrical signal conversion that receives; Medium access controller) carrying out breakpoint when detecting, sending to second generating laser 303 and be used to carry out the signal of telecommunication that breakpoint detects, second generating laser 303 is that the light signal of three-wavelength is launched with the electrical signal conversion that receives.
After second laser detector 304 is received the light signal of the three-wavelength that reflects, export the signal of telecommunication through after the opto-electronic conversion.
The signal of telecommunication of 305 pairs second laser detectors of breakpoint detection module, 304 outputs is sampled, is analyzed: the signal of telecommunication under the normal condition of the signal of telecommunication of sampling and preservation in advance compared, thus the position of definite breakpoint or fault point.
Above-mentioned first generating laser 301 that is applied to the optical line terminal optical module in ten gigabit passive optical networks specifically comprises: the EML of the 9.95328Gbps of 1577nm (Electro-absorption Modulated Laser, Electroabsorption Modulated Laser) transmitting illuminant and drive circuit thereof.The EML transmitting illuminant of the 9.95328Gbps of 1577nm is specially the descending continuous transmitting illuminant of EML of the 9.95328Gbps of 1577nm.The drive circuit of the EML transmitting illuminant of the 9.95328Gbps of this 1577nm receives the signal of telecommunication of ce circuit 307 outputs, drives this EML transmitting illuminant according to the signal of telecommunication that receives and launches the light signal that first wavelength is 1577nm.The light signal of this EML transmitting illuminant emission is that bit rate is the light signal of the descending continuous emission of 9.95328Gbps, and data frame structure satisfies the G.987.2 protocol requirement of agreement.The EML transmitting illuminant of the 9.95328Gbps of ce circuit, 1577nm and the circuit diagram of drive circuit thereof are as shown in Figure 4.Reached 10G owing to be applied to the downlink data of the optical line terminal optical module in ten gigabit passive optical networks; And wavelength is 1577nm; In order to guarantee transmission performance, need to use externally modulated laser EML and driver, and need to add ce circuit in the circuit.The circuit that the EML transmitting illuminant circuit of the 9.95328Gbps of this light source driving circuit and 1577nm is well known to those skilled in the art is introduced here no longer in detail.
Above-mentioned first laser detector 302 that is applied to the optical line terminal optical module in ten gigabit passive optical networks specifically comprises: the APD of the 2.488Gbps of 1270nm (Avalanche Photo Diode, avalanche photodide) pick-up probe and amplitude limiting amplifier circuit.The APD pick-up probe of the 2.488Gbps of 1270nm is specially the APD uplink burst pick-up probe of the 2.488Gbps of 1270nm.Second wavelength that the APD pick-up probe of the 2.488Gbps of 1270nm will receive is that the light signal of 1270nm converts the signal of telecommunication into, by amplitude limiting amplifier circuit APD pick-up probe electrical signal converted is amplified laggard line output.The APD pick-up probe of the 2.488Gbps of this 1270nm receives is that the bit rate of going up behavior 1270nm is the signal of 2.488Gbps, and the signal data frame structure satisfies the G.987.2 protocol requirement of agreement.The APD pick-up probe of the 2.488Gbps of 1270nm and the circuit diagram of amplitude limiting amplifier circuit are as shown in Figure 5.Because the APD pick-up probe of the 2.488Gbps of this 1270nm and the circuit that amplitude limiting amplifier circuit is well known to those skilled in the art are introduced no longer in detail here.
Second generating laser 303 that is applied to the optical line terminal optical module in ten gigabit passive optical networks specifically can comprise: OTDR DFB burst transmissions light source and the drive circuit thereof of 1625nm; The drive circuit of the OTDR DFB burst transmissions light source of 1625nm, driving this OTDR DFB burst transmissions light emitted three-wavelength is the light signal of 1625nm.Particularly; The signal of telecommunication that is used to carry out the breakpoint detection that the MAC of the drive circuit desampler of the OTDR DFB burst transmissions light source of 1625nm sends, driving this OTDR DFB burst transmissions light emitted three-wavelength according to the signal of telecommunication that receives is the light signal of 1625nm.When carrying out the breakpoint detection; MAC enables through the drive circuit of the OTDR DFB burst transmissions light source of TX_Dis_OTDR holding wire (or citing approvingly pin) control 1625nm, and sends the signal of telecommunication that is used to carry out the breakpoint detection to this drive circuit through the Data_OTDR holding wire; It is the light signal of 1625nm that this drive circuit drives OTDR DFB burst transmissions light emitted three-wavelength according to the signal of telecommunication that receives.
The OTDR DFB burst transmissions light source of 1625nm and the circuit diagram of drive circuit thereof are as shown in Figure 6, because the OTDR DFB burst transmissions light source of 1625nm and the circuit that drive circuit is well known to those skilled in the art thereof are introduced no longer in detail here.
The breakpoint detection module 305 that is applied to the optical line terminal optical module in ten gigabit passive optical networks specifically can comprise: gain circuitry and ADC (analog-to-digital conversion) circuit, and logic array circuit and MCU control circuit.The OTDRAPD detector of 1625nm and the circuit diagram of breakpoint detection module 305 are as shown in Figure 7, because the circuit that the OTDR APD detector circuit of 1625nm is well known to those skilled in the art is introduced no longer in detail here.
Obviously; Except the 1625nm wavelength; Second generating laser 303 of optical line terminal optical module also can adopt the OTDR DFB burst transmissions light source of other wavelength, and second laser detector 304 of optical line terminal optical module also can adopt the OTDR APD detector of other wavelength.For the OTDR DFB burst transmissions light source that adopts other wavelength in the optical line terminal optical module, perhaps the OTDR APD detector of other wavelength also should be regarded as protection scope of the present invention.
The gain circuitry of breakpoint detection module 305 amplifies the signal of telecommunication of the OTDR APD detector output of 1625nm; Be input in the adc circuit; Adc circuit is sampled to the signal of telecommunication, obtains digital signal, and the digital signal of sampling is stored in the logic array circuit.Logic array circuit compares the signal under adc circuit digital signal that deposits in and the normal condition that is stored in advance among storage medium such as the FLASH (flash memory); Through logical operation; Determine the position of breakpoints of optical fiber or fault point, and through and the MCU control circuit between interface the position of breakpoint or fault point sent to the MCU control circuit preserve.The MAC of switch can obtain the position of breakpoints of optical fiber or fault point through visit MCU control circuit.Logic array circuit specifically can be FPGA (Field Programmable Gata Array, field programmable gate array), PAL circuit such as (programmable logic arrays).Obviously, those skilled in the art also can adopt other device, realize that like computing chips such as single-chip microcomputer, processor, micro controller signal compares, and confirms the function of breakpoint or position of failure point.
The MCU control circuit is stored from the position that logic array circuit obtains breakpoint or fault point.The MCU control circuit specifically can be single-chip microcomputer, controller, processor of various models etc.
In addition; The MCU control circuit can also be communicated by letter with the MAC of switch, and the status signal of optical line terminal optical module is reported MAC, receives the instruction that MAC sends simultaneously; According to the work of commands for controlling first generating laser 301, the perhaps work of second generating laser 303.
Be applied to the integrated circuit sketch map of the optical line terminal optical module in ten gigabit passive optical networks; As shown in Figure 8; The EML transmitting illuminant and the drive circuit thereof that comprise the 9.95328Gbps of above-mentioned ce circuit, 1577nm; And APD pick-up probe, the amplitude limiting amplifier circuit of the 2.488Gbps of 1270nm; And OTDR DFB burst transmissions light source and the drive circuit thereof of 1625nm, and the OTDR APD detector of 1625nm and gain circuitry, adc circuit, logic array circuit and MCU control circuit.MCU control circuit wherein also can be used for controlling the mode of operation or the operating state of drive circuit of EML transmitting illuminant of the 9.953Gbps of 1577nm.
The operation principle that is applied to the optical line terminal optical module in ten gigabit passive optical networks is following:
The optical line terminal optical module that is applied in ten gigabit passive optical networks can communicate work and breakpoint testing simultaneously, perhaps only communicates work.
The communication work principle that is applied to the optical line terminal optical module in ten gigabit passive optical networks is:
The signal of telecommunication that the ce circuit desampler transmits carries out clock regeneration and data shaping to the signal of telecommunication that receives, and the signal of telecommunication after the shaping is input to again the drive circuit of EML transmitting illuminant of the 9.95328Gbps of 1577nm.The drive circuit of the EML transmitting illuminant of the 9.95328Gbps of 1577nm drives this EML transmitting illuminant and launches the light signal that first wavelength is 1577nm according to the signal of telecommunication of ce circuit output.The EML laser of 1577nm uses as the light source of down link, sends the light signal of continuous 9.95328Gbps, realizes the transmission of communication data.
The APD pick-up probe of the 2.488Gbps of 1270nm receives and sends uplink burst light bag by ONU; Convert light signal into the signal of telecommunication; Output to switch after by amplitude limiting amplifier circuit APD pick-up probe electrical signal converted being amplified, realize the reception of communication data.
Be applied to the breakpoint testing principle of the optical line terminal optical module in ten gigabit passive optical networks:
When optical fiber link generation breakpoint, the OTDR DFB burst transmissions light source of 1625nm sends a series of burst laser under the effect of its drive circuit; Laser is during through the breakpoint in the optical fiber link, because Rayleigh scattering and Fresnel reflection are understood some return loss light reflected back optical fiber, and laser light reflected and then turn back to the OTDR APD detector of 1625nm.The OTDR APD detector of 1625nm is received the light that reflects, and transforms through photoelectricity, forms the signal of telecommunication, then through the sampling of gain circuitry amplification and adc circuit, obtains digital signal transfers and gives logic array circuit FPGA.FPGA compares the signal under the normal condition of depositing among signal that receives and the Flash, finds the position that breakpoint takes place, and FPGA passes to the MCU control circuit through the SPI interface with breakpoint location.The MAC of switch learns the position that breakpoint takes place through visit MCU control circuit.
Fig. 9 illustrates fibercuts situation in ten gigabit passive optical networks: be applied to optical line terminal optical module in ten gigabit passive optical networks between the spliter; The long optical fiber of one section 10km is arranged; Spliter is 1km to the distance between the ONU1; Spliter is 2km to the distance between the ONU2, and spilter is 10km to the distance between the ONU3, but at the 7km place fibercuts has taken place.When we use the OTDR function of this optical module, the Distributed Feedback Laser of 1625nm emission laser signal, OTDR APD detector is received signal shown in figure 10.Can find out from signal shown in Figure 10, at the optical line terminal optical module apart from the 10km place, because the reflection of spliter; Detect a Fei Nier reflection peak,, detect the reflection peak of ONU1 at the 11km place; At the 12km place; Detect the reflection peak of ONU2,, detect the reflection peak that fibercuts causes at the 17km place.
The comparison system layout, the signal of normal condition should be: at the optical line terminal optical module apart from the 10km place, because the reflection of spliter; Detect a reflection peak, at the 11km place, we detect the reflection peak of ONU1; At the 12km place; We detect the reflection peak of ONU2, at the 20km place, detect the reflection peak of ONU3.
Thus, can judge that spliter breakpoint occurred to the circuit between the ONU3, this terminal, breakpoint distance light road optical module 17km.
Suppose after OTDR is luminous, receive the reflection peak (shown in figure 11) of breakpoint at the T2 time point, the distance of terminal, distance light road, breakpoint place optical module calculates according to following formula 1 so:
In the formula 1, c=3 * 10
8M/s is the light velocity, and n is the refractive index of fiber core, and the numerical value that d calculates is exactly the distance of terminal, breakpoint distance light road optical module.
After being applied to optical line terminal optical module in ten gigabit passive optical networks and encapsulating, itself and external equipment, such as the MAC or the SerDes of switch, the definition of the pin that is connected (pin) is as shown in table 1 below:
Table 1
Can find out that from last table 1 output pin after the optical line terminal light module package is 30.Wherein, relevant with the OTDR function of optical line terminal optical module pin comprises:
Pin two 5, Tx_Dis_OTDR: in order to the enable signal of desampler control OTDR, promptly the drive circuit of switch through the OTDR DFB burst transmissions light source of this pin control 1625nm enables;
Pin two 6, Data_OTDR: be used to carry out the signal of telecommunication that breakpoint detects in order to reception, promptly switch sends the signal of telecommunication that is used to carry out the breakpoint detection through this pin to the drive circuit of the OTDR of 1625nm DFB burst transmissions light source.
The pin relevant with the communication function of optical line terminal optical module comprises:
Pin two 8 and 29, i.e. TD-and TD+ pin: in order to the signal of telecommunication of communicating by letter of desampler input, promptly switch sends the signal of telecommunication through pin two 8 and 29 to ce circuit;
Pin one 7 and 18, i.e. RD-and RD+ pin: switch is through the signal of telecommunication of the amplitude limiting amplifier circuit output of the APD pick-up probe of the 2.488Gbps of pin one 7 and 18 reception 1270nm.
The relevant pins of control optical line terminal optical module comprises:
Pin one 1 and pin one 0, i.e. SDA and SCL pin: switch is communicated by letter through pin one 1 and pin one 0 realization and MCU control circuit.Particularly, switch sends instruction through pin one 1 and pin one 0 to the MCU control circuit, and receives the data that the MCU control circuit returns through pin one 1 and pin one 0, the breakpoint location that returns such as the MCU control circuit.
The internal structure of optical path component 306, shown in figure 12, comprising 4 TO-CAN (Transistor Outline CAN, coaxial type laser diode module) and 5 filters.4 TO-CAN are respectively: TO-CAN1, TO-CAN2, TO-CAN3, TO-CAN4.5 filters are respectively: F1, F2, F3, F4, F5.
Wherein, coaxial type laser diode module TO-CAN1 communicates with the EML transmitting illuminant light path of the 9.95328Gbps of 1577nm, is positioned at the high order end of optical path component, and is relative with the optical fiber interface of optical path component 306.Particularly, the light emitted chip of the EML transmitting illuminant of the 9.95328Gbps of 1577nm and first optical lens are packaged among the TO-CAN1.The light signal that the EML transmitting illuminant of the 9.95328Gbps of 1577nm sends penetrates behind first optical lens of TO-CAN1, through filter F1, and the transmission of F2 and F3, coupled into optical fibres is carried out the transmission of signal.
Coaxial type laser diode module TO-CAN2 communicates with the APD pick-up probe light path of the 2.488Gbps of 1270nm, is positioned at the right-hand member of optical path component top, and is perpendicular with the line of TO-CAN1 and optical fiber interface.Particularly, the optical signal detection chip of the APD pick-up probe of the 2.488Gbps of 1270nm and second optical lens are packaged among the TO-CAN2.After the light signal that is input to the 1270nm of optical path component 306 from optical fiber was imported second optical lens through the transmission of the reflection of F3 and F5, warp second optical lens entered into the optical signal detection chip of APD pick-up probe of the 2.488Gbps of 1270nm.
Coaxial type laser diode module TO-CAN3 communicates with the OTDR DFB burst transmissions light source light path of 1625nm, is positioned at the below of optical path component, and is perpendicular with the line of TO-CAN1 and optical fiber interface.Particularly, the light emitted chip and the 3rd optical lens of the OTDR DFB burst transmissions light source of 1625nm are packaged among the TO-CAN3.The light signal that the light emitted chip of the OTDR DFB burst transmissions light source of 1625nm sends is after the 3rd optical lens penetrates, through the reflection of F2 and the transmission of F3, coupled into optical fibres.
Coaxial type laser diode module TO-CAN4 communicates with the OTDR APD detector light path of 1625nm, is positioned at the left side of optical path component top, and is perpendicular with the line of TO-CAN1 and optical fiber interface.Particularly, the optical signal detection chip and the 4th optical lens of the OTDR APD detector of 1625nm are packaged among the TO-CAN4.Be input to the light signal of the 1625nm of optical path component 306 from optical fiber, through F3, the transmission of F2 and the reflection of F1, the transmission of F4 is after enter into the optical signal detection chip of the OTDRAPD detector of said 1625nm behind the 4th optical lens.
The anti-reflection film of filter F1 plating 1577nm and 1625nm increase anti-film, and it is arranged between TO-CAN1 and the optical fiber interface, and the center of F1 and first intersection point coincide, and F1 becomes 45 with the optical lens of TO-CAN1, become 45 with the optical lens of TO-CAN4; First intersection point refers to the intersection point of line of extended line and TO-CAN1 and the optical fiber interface of TO-CAN4.How on F1 the anti-reflection film of plating 1577nm and 1625nm increase anti-film so that F1 can see through the light of 1577nm wavelength, and reflect the technology that the light of 1625nm wavelength is well known to those skilled in the art, repeat no more here.
The anti-reflection film of filter F2 plating 1577nm, the transmission of 1625nm90% and 10% reflectance coating, it is arranged between TO-CAN1 and the optical fiber interface, and the center of F2 and second intersection point coincide, and F2 becomes 45 with the optical lens of TO-CAN3; Second intersection point refers to the intersection point of line of extended line and TO-CAN1 and the optical fiber interface of TO-CAN3.How on F2, to plate the anti-reflection film of 1577nm; The transmission of 1625nm90% and 10% reflectance coating are so that F2 can see through the light of 1577nm wavelength, the light of the 1625nm wavelength of projection 90%; The technology that the light of the 1625nm wavelength of reflection 10% is well known to those skilled in the art repeats no more here.
The anti-reflection film of filter F3 plating 1577nm, the anti-reflection film that increases anti-film and 1625nm of 1270nm, it is arranged between filter F2 and the optical fiber interface, and the center of F3 and the 3rd intersection point coincide, and F3 becomes 45 with the optical lens of TO-CAN2; The 3rd intersection point refers to the intersection point of line of extended line and TO-CAN1 and the optical fiber interface of TO-CAN2.How on F3, to plate the anti-reflection film of 1577nm, the anti-reflection film that increases anti-film and 1625nm of 1270nm; So that F3 can see through the light of 1577nm wavelength; The light of reflection 1270nm wavelength sees through the technology that the light of 1625nm wavelength is well known to those skilled in the art, and repeats no more here.
The anti-reflection film of filter F4 plating 1625nm, it is arranged between filter F1 and the TO-CAN4, and on the extended line that is centered close to TO-CAN4 of F4, and the optical lens of F4 and TO-CAN4 parallels.How on F4, to plate the anti-reflection film of 1625nm,, repeat no more here so that F4 can see through the technology that the light of 1625nm wavelength be well known to those skilled in the art.
The anti-reflection film of filter F5 plating 1270nm, it is arranged between filter F3 and the TO-CAN2, and on the extended line that is centered close to TO-CAN2 of F5, and the optical lens of F5 and TO-CAN2 parallels.How on F5, to plate the anti-film that increases of 1270nm,, repeat no more here so that F5 can see through the technology that the light of 1270nm wavelength be well known to those skilled in the art.
The embodiment of the invention is owing to not only be provided with first generating laser and first laser detector that is used to carry out optical signal communications in the optical line terminal optical module in being applied to ten gigabit passive optical networks; And; Also be provided with simultaneously and can be used for second generating laser and second laser detector that breakpoint detects; And can realize the transmitting-receiving of 4 road light signals through optical path component; Therefore, first generating laser and first laser detector are when carrying out optical signal communications, and second generating laser and second laser detector also can carry out the breakpoint testing.So; Use the optical line terminal optical module of the embodiment of the invention carrying out to break off optical fiber network system when breakpoints of optical fiber detects; And; When carrying out the breakpoint detection, first generating laser and first laser detector still can be worked, thereby can guarantee the normal transmission of the signal of the network that other does not have the breakpoint place.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to accomplish through program; This program can be stored in the computer read/write memory medium, as: ROM/RAM, magnetic disc, CD etc.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (9)
1. optical line terminal optical module that is applied in ten gigabit passive optical networks comprises:
Optical path component, it links to each other with optical fiber;
Ce circuit is used for the signal of telecommunication that desampler is imported, and the signal of telecommunication that receives is carried out clock regeneration and data shaping, and the signal of telecommunication after the shaping is exported;
First generating laser communicates with said optical path component light path, exports behind the light signal that is used to receive the signal of telecommunication of said ce circuit output and be converted into first wavelength, after said optical path component coupling, gets into said optical fiber;
First laser detector communicates with said optical path component light path, is used to receive the light signal of second wavelength, outputs to said switch after being converted into the signal of telecommunication; Wherein, the light signal of second wavelength is transferred to first laser detector from said optical fiber through said optical path component;
Second generating laser communicates with said optical path component light path, is used to launch the light signal of three-wavelength; The light signal of three-wavelength gets into said optical fiber after said optical path component coupling;
Second laser detector communicates with said optical path component light path, is used to receive the light signal of the three-wavelength of reflection, and exports after converting the light signal that receives into the signal of telecommunication; The light signal of the three-wavelength of said reflection is transferred to second laser detector from said optical fiber through said optical path component;
The breakpoint detection module is used for the signal of telecommunication of second laser detector output is sampled, analyzed, and determines the breakpoints of optical fiber position.
2. optical module as claimed in claim 1 is characterized in that,
After the second Laser emission implement body is used for carrying out the signal of telecommunication that breakpoint detects in being used to of receiving that said switch sends, be that the light signal of three-wavelength is launched with the electrical signal conversion that receives.
3. optical module as claimed in claim 2 is characterized in that,
The breakpoint detection module obtains digital signal after specifically being used for the signal of telecommunication of second laser detector output sampled, and digital signal that obtains and signal under the normal condition of preserving are in advance compared, and determines breakpoint location.
4. like the arbitrary described optical module of claim 1-3, it is characterized in that,
The first Laser emission implement body comprises: EML transmitting illuminant and the drive circuit thereof of the 9.95328Gbps of 1577nm; And first wavelength be specially 1577nm; The drive circuit of the EML transmitting illuminant of the 9.95328Gbps of said 1577nm receives the signal of telecommunication of said ce circuit output; And,
The first laser acquisition implement body comprises: APD pick-up probe and the amplitude limiting amplifier circuit of the 2.488Gbps of 1270nm; And second wavelength be specially 1270nm.
5. optical module as claimed in claim 4 is characterized in that,
The second Laser emission implement body comprises: OTDR DFB burst transmissions light source and the drive circuit thereof of 1625nm; And three-wavelength is specially 1625nm;
The second laser acquisition implement body comprises: the OTDR APD detector of 1625nm.
6. optical module as claimed in claim 5 is characterized in that, said breakpoint detection module specifically comprises: gain circuitry, adc circuit, logic array circuit and MCU control circuit;
After said gain circuitry is used for the signal of telecommunication to second laser detector output and amplifies, be input to said adc circuit;
Said adc circuit is used for the signal of telecommunication of input is sampled, and stores the digital signal of sampling into said logic array circuit;
The signal that said logic array circuit is used under digital signal that said adc circuit is deposited in and the normal condition of storing in advance compares, and confirms the breakpoints of optical fiber position; And the output optical fibre breakpoint location is preserved in said MCU control circuit.
7. optical module as claimed in claim 6 is characterized in that, said optical path component specifically comprises:
Coaxial type laser diode module TO-CAN1, filter F1, F2 and F3; Wherein, Encapsulated the Laser emission chip of EML transmitting illuminant of the 9.95328Gbps of first optical lens and said 1577nm among the TO-CAN1; The light signal of the light emitted chip output of the EML transmitting illuminant of the 9.95328Gbps of said 1577nm is after first optical lens penetrates, through the transmission of said filter F1, F2 and F3, coupled into optical fibres;
Coaxial type laser diode module TO-CAN2 and filter F5 wherein, have encapsulated the optical signal detection chip of APD pick-up probe of the 2.488Gbps of second optical lens and said 1270nm among the TO-CAN2; After importing second optical lens from the light signal of the 1270nm of said optical fiber input through the transmission of the reflection of said filter F3 and filter F5, warp second optical lens enters into the optical signal detection chip of APD pick-up probe of the 2.488Gbps of said 1270nm;
Coaxial type laser diode module TO-CAN3; Wherein encapsulated the Laser emission chip of the OTDR DFB burst transmissions light source of the 3rd optical lens and said 1625nm; The light signal that the Laser emission chip of the OTDR DFB burst transmissions light source of said 1625nm sends is after the 3rd optical lens penetrates; Through the reflection of said filter F2 and the transmission of filter F3, be coupled into said optical fiber;
Coaxial type laser diode module TO-CAN4 and filter F4; Wherein, Encapsulated the optical signal detection chip of the OTDR APD detector of the 4th optical lens and said 1625nm among the TO-CAN4, from the light signal of the 1625nm of said optical fiber input, through the transmission of said filter F3, F2; With the reflection of said filter F1, the transmission of said filter F4 is after the 4th optical lens enters into the optical signal detection chip of the OTDR APD detector of said 1625nm.
8. optical module as claimed in claim 7 is characterized in that,
The anti-reflection film of said filter F1 plating 1577nm and 1625nm increase anti-film; It is arranged between TO-CAN1 and the optical fiber interface; The center of F1 and first intersection point coincide, and F1 becomes 45 with the optical lens of TO-CAN1, become 45 with the optical lens of TO-CAN4; First intersection point refers to the intersection point of line of extended line and TO-CAN1 and the optical fiber interface of TO-CAN4;
The anti-reflection film of said filter F2 plating 1577nm, the transmission of 1625nm 90% and 10% reflectance coating, it is arranged between TO-CAN1 and the optical fiber interface, and the center of F2 and second intersection point coincide, and F2 becomes 45 with the optical lens of TO-CAN3; Second intersection point refers to the intersection point of line of extended line and TO-CAN1 and the optical fiber interface of TO-CAN3;
The anti-reflection film of said filter F3 plating 1577nm, the anti-reflection film that increases anti-film and 1625nm of 1270nm, it is arranged between filter F2 and the optical fiber interface, and the center of F3 and the 3rd intersection point coincide, and F3 becomes 45 with the optical lens of TO-CAN2; Second intersection point refers to the intersection point of line of extended line and TO-CAN1 and the optical fiber interface of TO-CAN2;
The anti-reflection film of said filter F4 plating 1625nm, it is arranged between filter F1 and the TO-CAN4, and on the extended line that is centered close to TO-CAN4 of F4, and the optical lens of F4 and TO-CAN4 parallels;
The anti-reflection film of said filter F5 plating 1270nm, it is arranged between filter F3 and the TO-CAN2, and on the extended line that is centered close to TO-CAN2 of F5, and the optical lens of F5 and TO-CAN2 parallels.
9. optical module as claimed in claim 8 is characterized in that, its output pin is 30; Comprising:
Pin Tx_Dis_OTDR is in order to the enable signal of desampler control OTDR;
Pin Data_OTDR is in order to the signal of telecommunication that is used to carry out the breakpoint detection of desampler transmission;
Pin TD-and TD+ are in order to receive the communication signal of telecommunication of said switch input;
Pin RD-and RD+ are in order to the said switch output communication signal of telecommunication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210237883.9A CN102761366B (en) | 2012-07-10 | 2012-07-10 | Be applied to the optical line terminal optical module in ten gigabit passive optical networks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210237883.9A CN102761366B (en) | 2012-07-10 | 2012-07-10 | Be applied to the optical line terminal optical module in ten gigabit passive optical networks |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102761366A true CN102761366A (en) | 2012-10-31 |
| CN102761366B CN102761366B (en) | 2015-09-30 |
Family
ID=47055697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210237883.9A Active CN102761366B (en) | 2012-07-10 | 2012-07-10 | Be applied to the optical line terminal optical module in ten gigabit passive optical networks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102761366B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701532A (en) * | 2013-12-27 | 2014-04-02 | 武汉电信器件有限公司 | 10G PON (passive optical network) OLT (optical line terminal) optical assembly structure |
| WO2014094255A1 (en) * | 2012-12-19 | 2014-06-26 | 青岛海信宽带多媒体技术有限公司 | Optical module of optical time domain reflectometer and breakpoint detection system of gigabit passive optical network |
| CN103997372A (en) * | 2014-05-16 | 2014-08-20 | 青岛海信宽带多媒体技术有限公司 | State monitoring method and device for optical module at optical line terminal |
| WO2019061544A1 (en) * | 2017-09-30 | 2019-04-04 | 华为技术有限公司 | Optical device apparatus, optical assembly, optical device, and optical line terminal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217313A (en) * | 2008-01-11 | 2008-07-09 | 北京邮电大学 | A fault diagnosis method applied OTDR passive optical network optical fiber |
| CN102035599A (en) * | 2010-12-01 | 2011-04-27 | 苏州新海宜通信科技股份有限公司 | FTTH passive optical link monitoring system and method |
| CN102122989A (en) * | 2010-01-08 | 2011-07-13 | 华为技术有限公司 | Line monitoring method, device and system |
| CN102299740A (en) * | 2011-08-22 | 2011-12-28 | 中兴通讯股份有限公司 | Optical Time Domain (OTD) detection method and Optical Line Terminal (OLT) |
-
2012
- 2012-07-10 CN CN201210237883.9A patent/CN102761366B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217313A (en) * | 2008-01-11 | 2008-07-09 | 北京邮电大学 | A fault diagnosis method applied OTDR passive optical network optical fiber |
| CN102122989A (en) * | 2010-01-08 | 2011-07-13 | 华为技术有限公司 | Line monitoring method, device and system |
| CN102035599A (en) * | 2010-12-01 | 2011-04-27 | 苏州新海宜通信科技股份有限公司 | FTTH passive optical link monitoring system and method |
| CN102299740A (en) * | 2011-08-22 | 2011-12-28 | 中兴通讯股份有限公司 | Optical Time Domain (OTD) detection method and Optical Line Terminal (OLT) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014094255A1 (en) * | 2012-12-19 | 2014-06-26 | 青岛海信宽带多媒体技术有限公司 | Optical module of optical time domain reflectometer and breakpoint detection system of gigabit passive optical network |
| CN103701532A (en) * | 2013-12-27 | 2014-04-02 | 武汉电信器件有限公司 | 10G PON (passive optical network) OLT (optical line terminal) optical assembly structure |
| CN103701532B (en) * | 2013-12-27 | 2017-07-18 | 武汉电信器件有限公司 | A kind of 10G PON OLT optical assembly structures |
| CN103997372A (en) * | 2014-05-16 | 2014-08-20 | 青岛海信宽带多媒体技术有限公司 | State monitoring method and device for optical module at optical line terminal |
| WO2019061544A1 (en) * | 2017-09-30 | 2019-04-04 | 华为技术有限公司 | Optical device apparatus, optical assembly, optical device, and optical line terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102761366B (en) | 2015-09-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102957977B (en) | EPON and optical time domain detector optical module thereof | |
| US9036991B2 (en) | Optical transceiver having an OTDR mode, and a method of obtaining test data for testing an optical fiber | |
| US8805183B2 (en) | Optical line terminal (OLT) and method therefore for performing in-band and out-band OTDR measurements | |
| CN103036615B (en) | Optical time domain detector optical module and gigabit passive optical network breakpoint detection system | |
| CN202696605U (en) | PON light module detecting device | |
| CN103229433B (en) | A kind of optical line terminal, optical time domain reflectometer and signal transmit-receive method and system | |
| CN102761367A (en) | Optical line terminal optical module | |
| CN102761375A (en) | Optical line terminal optical terminal used in Gigabit passive optical network | |
| CN102752051A (en) | Optical component of optical network unit with optical time domain reflection function | |
| CN103259599A (en) | Passive optical network and double-system optical line terminal optical module | |
| CN102761366B (en) | Be applied to the optical line terminal optical module in ten gigabit passive optical networks | |
| CN103580748A (en) | Optical line terminal with OTDR function and optical module thereof | |
| CN202794620U (en) | Four-path receiving-transmitting optical device | |
| CN202679371U (en) | Optical network unit optical assembly with optical time domain reflection function | |
| US20180294873A1 (en) | Automatic optical reflectometer power adjustment | |
| CN103078676A (en) | Passive compatible optical network and optical-network-unit optical module thereof | |
| CN103812555B (en) | Active network monitoring system and monitoring method thereof | |
| CN202737869U (en) | Light module having fiber link breakpoint detection function | |
| CN104205676A (en) | Optical line terminal, optical transceiver module, system, and fiber detection method | |
| CN103166700A (en) | Passive optical network and optical network unit optical module thereof | |
| CN102761371A (en) | Optical component with optical time domain reflection function | |
| CN201118599Y (en) | An optical module device and host board | |
| CN103067078B (en) | Optical line terminal optical module and Ethernet passive optical network breakpoint detection system | |
| CN203166930U (en) | Optical network unit optical module | |
| CN202798724U (en) | Optical line terminal photoelectric device with built-in optical time domain reflecting function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |