CN201243291Y - Light transmit-receive integrated module for myriad million optical network unit terminal - Google Patents

Abstract

The utility model discloses an optical fiber transceiver module at the 10 gigabit optical-fiber network unit end, which comprises a transmitter circuit and receiver circuit; the receiver circuit includes an optical receiving component, an amplitude limit amplifying circuit and a signal shaping circuit; the optical component can convert the received optical signal to the electric signal, and then input the electric signal to the input end of the amplitude limit amplifying circuit; after being limited and amplified by the amplitude limit amplifying circuit, the electric signal is output to the input end of the signal shaping circuit; and the electric signal after being filtered and shaped by the signal shaping circuit is output by the signal output end of the module. Through the amplitude limit amplifying circuit and the signal shaping circuit to amplify and filter to shape the signal output by the optical receiving component, the optical fiber transceiver module realizes the 10Gbps transmission speed at the downlink of the module, so as to suffice the users requirements for the high-speed bandwidth.

Description

The 10000000000 optical network unit end integrated modules of optical transceiver

Technical field

The utility model relates to a kind of integrated module of optical transceiver, specifically, relates to 10,000,000,000 integrated modules of optical transceiver that a kind of optical network unit end uses, and belongs to the optical communication technique field.

Background technology

Along with the continuous development of optical communication technique, increasing video traffic such as visual telephone, videoconference, network interactive game, video request program, HDTV (High-Definition Television) and interactive service have been come into huge numbers of families, and multi-service is the main direction of following broadband development.When wide band multi-business constantly develops, the network bandwidth also there has been higher requirement.At present, be used for that Fiber To The Curb (FTTC), Fiber To The Building (FTTB) and the upstream rate and the downstream rate of ethernet passive optical network (EPON) integrated module of optical transceiver of Fiber to the home FTTx business such as (FTTH) all are 1.25Gbps, through behind the line coding, introduce about 20% bandwidth loss, add other circuit consumption, its actual transfer rate reduces significantly.Therefore, the bandwidth that this class integrated module of optical transceiver is provided has had a strong impact on the online demand and the experience of optical network unit end subscriber, can not satisfy the demand of people to vision signal definition and other data transmission baudss well.

For these reasons, needing badly a kind ofly can provide the more integrated module of optical transceiver of high transfer rate, and to satisfy the bandwidth demand that increases day by day, this also is purport of the present utility model place.

Summary of the invention

The utility model in the prior art based on the lower technical problem of the integrated module of optical transceiver transmission rate of EPON, it is that 10Gbps, uplink speed are 10,000,000,000 integrated modules of optical transceiver of 1.25Gbps that a kind of downlink transfer speed is provided, and has satisfied the demand of user to the high speed bandwidth.

For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:

A kind of 10,000,000,000 optical network unit end integrated modules of optical transceiver comprise transmitter circuitry and receiver circuit, it is characterized in that described receiver circuit comprises optical fiber receive module, amplitude limiting amplifier circuit and signal transformation circuit; Described optical fiber receive module converts the light signal that receives to the input that is input to described amplitude limiting amplifier circuit behind the signal of telecommunication, input to the input of described signal transformation circuit after described amplitude limiting amplifier circuit amplitude limit amplifies again, the signal of telecommunication behind described signal transformation circuit filter shape is by the signal output part output of module.

According to the utility model, include a signal shaping chip in the described signal transformation circuit, the input of described signal shaping chip connects the output of described amplitude limiting amplifier circuit, the output of described signal shaping chip links to each other with the signal output part of module, and the signal output part by described module behind the signal of telecommunication filter shape of amplitude limiting amplifier circuit output is exported.

According to the utility model, the decision signal output of described amplitude limiting amplifier circuit is connected with warning circuit, output decision signal when the signal of telecommunication that receives at amplitude limiting amplifier circuit is lower than its threshold voltage, and control described warning circuit and report to the police.

According to the utility model, described amplitude limiting amplifier circuit and signal transformation circuit adopt an integrated chip to realize; The input of described integrated chip connects the electrical signal of described optical fiber receive module, and the signal output part of the electrical signal link block of described integrated chip.

According to the utility model, for the collection of letters intensity that achieves a butt joint is indicated so that the purpose that the communication link of system is monitored, the luminous power output of described optical fiber receive module is connected with supervisory circuit, described supervisory circuit receives the optical power signals of described optical fiber receive module, and the output intensity instruction signal relevant with described optical power signals.

According to the utility model, described transmitter circuitry comprises that light emission component and emission drive modulation circuit, described emission drives the modulation circuit input and receives the armed signal of telecommunication, and by its output to described light emission component output drive signal, send after utilizing described emitting module that armed electrical signal conversion is become light signal.

According to the utility model, described optical fiber receive module is preferably the avalanche photodetector assembly, and described light emission component is preferably the distributed feedback type semiconductor laser assembly.

According to the utility model, be the optical fiber receive module realizing being separated from each other and the light path coupling of light emission component, described optical fiber receive module is connected with wavelength division multiplexer respectively with light emission component.

According to the utility model, for improving the heat dispersion and the EMI/ESD performance of module, the shell of described module adopts kirsite to make.

Compared with prior art, advantage of the present utility model and good effect are: the signal of optical fiber receive module being exported by amplitude limiting amplifier circuit and signal transformation circuit amplifies and filter shape, realized the transmission rate of the descending 10Gbps of module, satisfied the user demand of user the two-forty bandwidth.Simultaneously, consider that the optical network unit end subscriber in most cases is to carry out online browsing and download, and send the instruction or the needed bandwidth of uplink data less, drive modulation circuit by emission the emission optical assembly is driven modulation, realized the transmission rate of the up 1.25Gbps of module, thereby the bandwidth demand according to user's reality adopts different transmission rates, has reduced the manufacture difficulty of module, has saved cost of manufacture.

Description of drawings

Fig. 1 is the contour structures schematic diagram of the integrated module of optical transceiver described in the utility model;

Fig. 2 is the schematic block circuit diagram of the integrated module of optical transceiver;

Fig. 3 is the schematic diagram of receiver circuit in the integrated module of optical transceiver;

Fig. 4 is the schematic diagram of transmitter circuitry in the integrated module of optical transceiver.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

Referring to Fig. 1, the integrated module of optical transceiver described in the utility model comprises housing 1, and housing 1 is provided with several screws 2 and bolt hole 3.Described screw 2 is used for being connected and fixed the circuit board and the housing 1 of inside modules, and described bolt hole 3 is used for module and female equipment are fixed.Also be provided with several thermal columns 4 on the housing 1, the heat that is used for producing in the module routine loses as early as possible, guarantees the operate as normal of each photoelectric device of module.Be respectively arranged with the optical interface 5 and the electrical interface 6 of module in the both sides of module housing 1, wherein, optical interface 5 is the SC/APC connector, is the light signal input/output port of module; And electrical interface 6 adopts the golden finger forms, the port that is electrically connected with female equipment as module.

Fig. 2 is the schematic block circuit diagram of the 10000000000 optical network unit end integrated modules of optical transceiver described in the utility model, and among the figure, module comprises transmitter circuitry I and receiver circuit II two parts.Transmitter circuitry comprises that emission drives modulation circuit and light emission component, the differential electric signal of armed 1.25Gbps inputs in the emission driving modulation circuit through signal input part TX+ in the module electric interface 6 and TX-, drives the light emission component of 1310nm centre wavelength by described drive circuit.Described light emission component is launched the light signal of 1310nm wavelength, exports by optical fiber after the wavelength division multiplexer coupling.

For realizing that module receives the light signal of 10Gbps, the receiver circuit of described module comprises optical fiber receive module, amplitude limiting amplifier circuit and signal transformation circuit.The light signal of the 1577nm that comes by Optical Fiber Transmission is coupled on the optical fiber receive module and converts the signal of telecommunication to through wavelength division multiplexer.The described signal of telecommunication amplifies through amplitude limiting amplifier circuit earlier, inputs to then to carry out signal shaping in the signal transformation circuit, filter noise, then signal output part RX+ and the RX-output differential electric signal by electrical interface 6.The decision signal output of described amplitude limiting amplifier circuit is connected with warning circuit, output decision signal when the signal of telecommunication that receives is lower than its threshold voltage, the control warning circuit is reported to the police, and the warning end RX_LOS output alarm signal by module electric interface 6, the voltage signal amplitude that can be implemented in optical fiber receive module output is low excessively, promptly think and do not report to the police when having the light signal input.In addition, the integrated module of optical transceiver described in the utility model is that intensity is indicated so that the communication link of system is monitored to received signal, luminous power output at described optical fiber receive module also is connected with supervisory circuit, described supervisory circuit receives the optical power signals of described optical fiber receive module, and exports the intensity instruction signal relevant with described optical power signals by the RSSI port of electrical interface 6.

Figure 3 shows that the physical circuit connection layout of an embodiment of above-mentioned receiver circuit.In this embodiment, optical fiber receive module is avalanche photodetector assembly APDROSA, and amplitude limiting amplifier circuit and signal transformation circuit adopt an integrated chip U1 to realize.The light signal that comes from Optical Fiber Transmission is coupled on the ROSA through wavelength division multiplexer, described ROSA is converted to the signal of telecommunication with light signal, and, after capacitor C 27 and C28 filtering, input to input LAIN and the LAIP of integrated chip U1 then respectively again by its output OUT-and OUT+ output.The signal of telecommunication that inputs to integrated chip U1 carries out amplitude limit earlier and amplifies, then through the shaping of circuit such as phase-detection, low-pass filtering realization to the signal of telecommunication, to filter the shake of signal noise, minimizing signal.Differential electric signal after the shaping is output SDON by U1 and SDOP output respectively, transfers to the signal output part RX+ and the RX-output of module electric interface 6 more respectively through filter capacitor C42 and C43.In addition, the decision signal of amplitude limiting amplifier circuit is reported to the police as the control signal control warning circuit of warning circuit by the LOS pin output of U1.

The foregoing description realizes that by an integrated chip U1 amplitude limit of receiver circuit amplifies and signal shaping, certainly, also can adopt the amplitude limiting amplifier circuit of separation and amplitude limit that signal transformation circuit is realized the signal of telecommunication respectively to amplify and signal shaping.When adopting the circuit that separates, include a signal shaping chip in the signal transformation circuit, the input of described signal shaping chip connects the output of amplitude limiting amplifier circuit, the output of described signal shaping chip links to each other with the signal output part of module, and the signal output part by described module behind the signal of telecommunication filter shape of amplitude limiting amplifier circuit output exported, the concrete course of work is similar with the employing integrated chip, repeats no more.

Fig. 4 is the physical circuit connection layout of an embodiment of transmitter circuitry.Among this embodiment, light emission component is distributed feedback type semiconductor laser assembly DFB TOSA, and emission drives modulation circuit and realizes by an integrated chip U2.Signal input part IN+ and IN-that signal input part TX+ and the TX-of armed differential electric signal by module inputs to U2 after chip internal is handled, drive the High Speed Modulation signal of TOSA from its modulation signal output OUT+ and OUT-output.Simultaneously, the bias current input from the bias current output BIAS+ output offset current signal of chip U2 to TOSA.TOSA becomes corresponding light signal with armed electrical signal conversion under the driving of described bias current signal and High Speed Modulation signal, export by optical fiber after the wavelength division multiplexer coupling then.

The utility model utilizes above-mentioned transmitter circuitry and receiver circuit, the descending 10Gbps that has realized the optical network unit end integrated module of optical transceiver receives continuously, the transmission of 10,000,000,000 signals of up 1.25Gbps burst transmissions, transmission range can reach 20km, business support ability is strong, can satisfy the user demand of user well to high bandwidth, adopt asymmetrical up-downgoing transmission rate at the actual behaviour in service of user again, reduced module production difficulty and production cost, improve the competitiveness of product in market.

Certainly; the above only is a kind of preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.

Claims (10)

1, a kind of 10,000,000,000 optical network unit end integrated modules of optical transceiver, comprise transmitter circuitry and receiver circuit, it is characterized in that, described receiver circuit comprises optical fiber receive module, amplitude limiting amplifier circuit and signal transformation circuit, described optical fiber receive module converts the light signal that receives to the input that is input to described amplitude limiting amplifier circuit behind the signal of telecommunication, input to the input of described signal transformation circuit after described amplitude limiting amplifier circuit amplitude limit amplifies again, the signal of telecommunication behind described signal transformation circuit filter shape is by the signal output part output of module.

2, the integrated module of optical transceiver according to claim 1, it is characterized in that, include a signal shaping chip in the described signal transformation circuit, the input of described signal shaping chip connects the output of described amplitude limiting amplifier circuit, the output of described signal shaping chip links to each other with the signal output part of module, and the signal output part by described module behind the signal of telecommunication filter shape of amplitude limiting amplifier circuit output is exported.

3, the integrated module of optical transceiver according to claim 1, it is characterized in that, the decision signal output of described amplitude limiting amplifier circuit is connected with warning circuit, output decision signal when the signal of telecommunication that receives at amplitude limiting amplifier circuit is lower than its threshold voltage, and control described warning circuit and report to the police.

4, the integrated module of optical transceiver according to claim 3 is characterized in that, described amplitude limiting amplifier circuit and signal transformation circuit adopt an integrated chip to realize; The input of described integrated chip connects the electrical signal of described optical fiber receive module, and the signal output part of the electrical signal link block of described integrated chip.

5, according to each described integrated module of optical transceiver in the claim 1 to 4, it is characterized in that, the luminous power output of described optical fiber receive module is connected with supervisory circuit, described supervisory circuit receives the optical power signals of described optical fiber receive module, and the output intensity instruction signal relevant with described optical power signals.

6, the integrated module of optical transceiver according to claim 1 is characterized in that, described optical fiber receive module is the avalanche photodetector assembly.

7, the integrated module of optical transceiver according to claim 1, it is characterized in that, described transmitter circuitry comprises that light emission component and emission drive modulation circuit, described emission drives the modulation circuit input and receives the armed signal of telecommunication, and by its output to described light emission component output drive signal, send after utilizing described emitting module that armed electrical signal conversion is become light signal.

8, the integrated module of optical transceiver according to claim 7 is characterized in that, described light emission component is the distributed feedback type semiconductor laser assembly.

According to the claim 7 or the 8 described integrated modules of optical transceiver, it is characterized in that 9, described optical fiber receive module is connected with wavelength division multiplexer respectively with light emission component.

10, the integrated module of optical transceiver according to claim 1 is characterized in that, the shell of described module adopts kirsite to make.

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