CN1307410A - Single-fiber two-way integral optical module for burst transmission - Google Patents
Single-fiber two-way integral optical module for burst transmission Download PDFInfo
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- CN1307410A CN1307410A CN00100679A CN00100679A CN1307410A CN 1307410 A CN1307410 A CN 1307410A CN 00100679 A CN00100679 A CN 00100679A CN 00100679 A CN00100679 A CN 00100679A CN 1307410 A CN1307410 A CN 1307410A
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Abstract
The integral optical module for far end light burst emission and continuous receiving includes a optical device unit, a light driving circuit unit and a light receiving unit. The light driving circuit unit includes light power controller circuit, logic control circuit, bias driving circuit, background light control circuit and light modulating driver circuit. The light receiving unit includes pre-amplifier circuit and post-shaping circuiit. The driving current of laser consists of modulating current and bias current controlled by the OFF control signal for fast on-off and adjustable output light power.
Description
The present invention relates to a kind of bidirectional optical module circuit, the integrated single-fiber two-way integral optical module that relate to a kind of burst transmissions or rather, receives continuously.It is a kind of single-fiber two-way integral optical module for burst transmission that is used in EPON (PON-PassiveOptical Netware) system and ATM(Asynchronous Transfer Mode) passive optical network (ATM PON) optical network unit at remote side (ONU-Optical Netware Unit).
In optical signal transmission network, data are transmitted in optical fiber and are adopted dual mode usually: continuous mode transmission means and burst mode transfer mode.
Continuous mode claims normal mode again, driving source of the optical signals that transmits under continuous mode produces, link up between each signal frame, this normal mode photosignal waveform usually as shown in fig. 1, in passive optical network, general optical transmission with continuous mode is used for the downstream signal transmission under time division multiplexing (the TDM-Time Division Multiple) mode, optical line terminal is that local side (OLT-Optic Line Terminal) sends data-signal by broadcast mode to each optical network unit (ONU) of far-end, is selected from continuous data and one or several relevant frame data by each optical network unit (ONU) of far-end.
The light signal that under burst mode, transmits, can produce by one or several driving source, this outburst mode optical signal waveform can be referring to Fig. 2, each optical network unit (ONU) only sends Frame in distributing to the time slot of oneself (signal frame as shown in FIG.), then be in emission wait state (frame gap as shown in FIG.) At All Other Times, in passive optical network, general optical transmission with burst mode is used for the uplink signal transmissions under time division multiple access (the TDMA-TimeDivision Multiple Address) mode, each optical network unit (ONU) happens suddenly in some or several related time-slots and sends the Frame of oneself, and it is that local side (OLT) transmits that the Frame of each optical network unit (ONU) combines in optical fiber to optical line terminal.
Above-mentioned explanation can reduce: in passive optical network, the routine that each optical network unit (ONU) adopts time division multiple access way to carry out downstream signal receives and carries out the burst mode optical transmission of upward signal, promptly the moment in regulation is local side (OLT) emission to optical line terminal, and the Frame of each optical network unit (ONU) makes up in optical fiber.Three problems of main existence in this working method: first, because in the upstream data, each Frame that transmits on same optical fiber is from different optical network units (ONU), it is overlapping for fear of the optical network unit that faces mutually (ONU) the Frame collision to take place, must between the Frame of optical network unit (ONU), establish protection Tg transit time (Guard Time), as shown in Figure 2, simultaneously in order to improve the efficiency of transmission of system, reduce extra resource consumption, reduce cost, this protection Tg transit time also should be short as much as possible, opens and will make protection Tg transit time dwindle the light that must make the light emission module that works in burst mode, the speed that light turn-offs improves; Second, launch and the data-signal of other optical network unit (ONU) is in blocking interval at certain optical network unit (ONU), the shutoff Yu Guanghui that optical network unit (ONU) to be launched such as is in is superimposed upon on the data-signal of the optical network unit of launching (ONU), cause signal to noise ratio to reduce, produce error code, therefore at the blocking interval of optical network unit (ONU), the Yu Guangying that sends out low as much as possible; The 3rd, because the applied region of passive optical network difference, each optical network unit (ONU) arrival optical line terminal is that the path of local side (OLT) is also different with loss, therefore, in same system, requiring optical line terminal is that local side (OLT) can adapt to the luminous power in different distance place each optical network unit (ONU) (at present, in the technology that comparative maturity has been arranged aspect the light-receiving recovery of downstream signal transmission).
In sum, optical network unit (ONU) need be finished the transmission of burst light and conventional two tasks of continuous light reception simultaneously when the overall optical network transmission system is worked.
The optical network unit (ONU) of existing light network transmission system roughly adopts following several modes to finish light transmission and light-receiving function: to adopt conventional (continuously) to send optical module and routine (continuously) reception optical module respectively; Adopt conventional (continuously) to send and receive incorporate optical module with conventional (continuously); Adopt burst to send optical module and routine (continuously) reception optical module respectively.
The shortcoming that technique scheme exists is:
1. the light emission module (laser) of conventional (continuously) sending mode, usually can not finish the function that opens and shuts off signal fast, allow optical module luminous from turn-offing control signal, till and data that send luminous to module are effective, middle time delay is generally more than hundred nanosecond orders, can only use in middle idling slow speed system, can't in the system of transmission, use greater than 50Mb/s, the technical measures of guard time Tg if in frame structure, take simultaneously to extend, increased line resource consumption again, reduced transmission efficiency and increase system cost;
2. the light emission module (laser) of conventional (continuously) sending mode, the general automatic power control circuitry that is applicable to the emission of usual manner signal that all is provided with, the automated power control technology that is adopted can make laser also can send stronger surplus light at the signal blocking interval, these surplus light are superimposed on the Frame of other optical network unit (ONU), effective light is worsened, increase noise, cause transmission range and power system capacity to reduce;
3. in the prior art, transmitting range for the light emission module (laser) that increases routine (continuously) sending mode, can only increase the transmitting power (maximum transmission power that uses laser to allow) of laser, but when this light emission module (laser) when closely using, must in light path, add optical attenuator again, so that in the scope that optical power attenuation can be born to Optical Receivers (photo-detector), increase parts and promptly reduced the reliability of system and increased cost;
4. use light emission module, the Optical Receivers of split, system just is required to be each optical module and sets up circuit and light path, and the complexity of system and production maintenance cost are increased, and reliability but reduces.
According to the knowledge of the applicant, at present, the optical module that meets the ONU side of ITU-TG.983 suggestion or the OLT side commercialization of also all being unrealized.
The objective of the invention is to design a kind of single-fiber two-way integral optical module for burst transmission, be a kind of be used for far-end (ONU) can realize burst transmissions and the conventional integral optical module circuit that receives simultaneously, and can comprehensively solve the technical problem of aforementioned four aspects: can open and shut off fast, turn-off that surplus auroral poles is little, light emitting power is controlled and set up circuit kit and light path.
The object of the present invention is achieved like this: a kind of single-fiber two-way integral optical module for burst transmission, comprise: one contains the optical device unit of laser and photo-detector at least, the electrical data signal of input number is converted into the light data-signal and controls the light drive circuit unit of laser in the optical device unit, with will revert to the optical receiving circuit unit of electrical data signal number by optical fiber input and by the light data-signal of photo-detector sensing in the optical device unit, it is characterized in that: described light drive circuit unit comprises optical power control circuit, logic control circuit, bias drive circuit and light modulation drive circuit; Described optical power control circuit is provided with the optical power control signal input, described logic control circuit is respectively equipped with data input pin and turn-offs the control input end, described bias drive circuit is provided with turn-offs the control input end, the shutoff control input end of logic control circuit is connected with the shutoff control input end of described bias drive circuit, optical power control circuit and logic control circuit output connect described light modulation drive circuit respectively, the common laser that connects in the described optical device unit of the output of described light modulation drive circuit and bias drive circuit is respectively laser modulated current and bias current is provided; Described optical device unit, light drive circuit unit, optical receiving circuit unit integral are arranged in the same module.
Described optical device also includes pipe backlight in the unit, and described light drive circuit also includes backlight control circuit in the unit, and described pipe backlight connects described backlight control circuit, and the output of backlight control circuit connects described bias drive circuit.
Described backlight control circuit is linked in sequence and constitutes by oppositely striding resistance amplifying circuit, peak-detector circuit and amplifier, and described pipe backlight connects the input of oppositely striding the resistance amplifying circuit, and amplifier output is connected with described bias drive circuit.
Described optical power control circuit selects an analog switch and isolation buffer circuit to be linked in sequence by M reference voltage source, M to constitute; Described optical power control signal input is the control end that M selects an analog switch, and the output of isolation buffer circuit connects described light modulation drive circuit.
Described logic control circuit is to finish data-signal to open, the PECL Digital Logical Circuits of turn-off function, comprise differential data signals DATA, / DATA makes the dual input difference AND with logical operation, difference is turn-offed control signal OFF, / OFF makes the dual input difference AND with logical operation, with the logical circuit that two ANDs output do operation back output is turned off the PECL level data signal of control signal modulation, this logical circuit has differential output signal positive terminal and end of oppisite phase DAT, / DAT, and be connected to described light modulation drive circuit.
Described light modulation drive circuit is connected to form by resistance R 1, resistance R 2, triode Q1, triode Q2 and first voltage-controlled current source; Triode Q1 is connected described logic control circuit positive, reversed-phase output respectively with the base stage of triode Q2, triode Q1 is connected resistance R 1 and resistance R 2 respectively with the collector electrode of triode Q2, resistance R 1 connects power Vcc, the laser that resistance R 2 connects in the described optical device unit, triode Q1 is connected with first voltage-controlled current source with the emitter of triode Q2, and the control end of first voltage-controlled current source connects the output of described optical power control circuit.
Described bias drive circuit is connected to form by resistance R 8, resistance R 9, resistance R 10, capacitor C 1, triode Q4, triode Q5 and second voltage-controlled current source; Triode Q4 is connected logic control circuit positive, anti-phase shutoff control input end respectively with the base stage of triode Q5, reception difference cut-off signals OFF ,/OFF, the collector electrode of triode Q4 connects power Vcc by resistance R 8, the collector electrode of triode Q5 connects power Vcc by resistance R 9 and capacitor C 1, the laser that the collector electrode of triode Q5 also connects in the described optical device unit by resistance R 10, triode Q4 is connected with second voltage-controlled current source with the emitter of triode Q5, and the control end of second voltage-controlled current source connects the output of backlight control circuit.
Described light receiving unit is connected and composed by pre-amplification circuit and rear shaping circuit; Described pre-amplification circuit connects the capacitance-resistance filter network and constitutes by striding the resistance amplifying circuit, strides the input of resistance amplifying circuit and is connected with photo-detector in the described optical device unit; Described rear shaping circuit is connected and composed by amplitude limiting amplifier circuit and PECL buffer circuit, PECL buffer circuit output PECL level data signal.
Single-fiber two-way integral optical module for burst transmission of the present invention, it is a kind of optical module that can receive by burst mode emission, conventional (continuously) pattern simultaneously, the overall optical module organically is combined into one the light emission of burst mode and the light-receiving of normal mode, and form a single-fiber two-way integral optical module for burst transmission, help the circuit design and the light path design of simplified system; Because module has been used through improving the unlatching of design, switch off control circuit, modulated current and bias current can be controlled simultaneously open or turn-off, and the time of opening or turn-offing is all less than lns, the luminous power of laser is had no progeny less than-70dBm in the pass, thereby make an optical network unit (ONU) at the signal blocking interval, the surplus light that is produced by its Optical Transmit Unit circuit is to the almost not influence of Frame of other optical network unit (ONU), time of opening and shutting off can make the shared extra resource consumption of Frame of optical network unit (ONU) be reduced to minimum level fast for it, optical module of the present invention can be applied in the passive optical network (PON) at a high speed, increase efficiency of transmission and reduce system cost; Also owing in module, used power control circuit, dynamically control light emitting power, embodiment shows, its control range can reach fourth gear, every grade-2dBm, make optical module of the present invention can be in different transmission ranges can both and the light receiving unit circuit of optical line terminal (OLT) between realize best fit.Optical transmission system adopts a cover light path and a circuit if use this optical module of the present invention, but simplified system designs, reduces system cost, improves the job stability and the reliability of system.
Further specify technology of the present invention below in conjunction with embodiment and accompanying drawing.
Fig. 1 is a normal mode photosignal waveform schematic diagram
Fig. 2 is an outburst mode optical signal waveform schematic diagram
Fig. 3 is a single-fiber two-way integral optical module for burst transmission principle structure block diagram of the present invention
Fig. 4 is the circuit theory diagrams of optical power control circuit 321 among Fig. 3
Fig. 5 is the circuit theory diagrams of logic control circuit 322 among Fig. 3
Fig. 6 is the circuit theory diagrams of backlight control circuit 323 among Fig. 3
Fig. 7 is the circuit theory diagrams of light light modulation drive circuit 324 among Fig. 3
Fig. 8 is the circuit theory diagrams of bias drive circuit 325 among Fig. 3
Fig. 9 is the circuit theory diagrams of pre-amplification circuit 331 among Fig. 3
Figure 10 is the circuit theory diagrams of rear shaping circuit 332 among Fig. 3
Address before Fig. 1, Fig. 2 illustrate, repeat no more.
Referring to Fig. 3, single-fiber two-way integral optical module for burst transmission of the present invention is made up of optical device unit 31, light drive circuit unit 32 and optical receiving circuit unit 33.Optical device unit 31 comprises a laser 311, a photo-detector 312, one pipe 313 backlight and a wavelength division multiplexing circuit (WDM, not shown) at least.Optical device unit 31 is connected with single fiber 34.Laser 311 will be converted into the light signal that wavelength is 1310nm from the drive current of light modulation drive circuit 324, from optical fiber 34 outputs; The light signal strength of pipe 313 detection laser 311 backlight, and output and the corresponding current value of optical power value, pipe 313 backlight and backlight control circuit 323 are used for detection backlight, and common detection backlight is not turn-offed; The wavelength that photo-detector 312 detects from optical fiber 34 is the light signal of 1550nm, and exports the photoelectric current data-signal of light signal correspondence therewith.Wavelength division multiplexing circuit (WDM) is used for separating the light signal of optical fiber 34 1310nm and the light signal of 1550nm.
Light drive circuit unit 32 be used for will input the optical power control signal laser 311 that is converted into the light data-signal and controls optical device unit 31 carry out the light emission.Light drive circuit unit 32 is connected to form by optical power control circuit 321, logic control circuit 322, backlight control circuit 323, light modulation drive circuit 324 and bias drive circuit 325.Bias drive circuit 325 provides drive current for laser 311 jointly with light modulation drive circuit 324, the output of bias drive circuit 325 is connected with laser 311 in the optical device unit 31, for laser 311 provides bias current, laser 311 is operated in more than the preset current of himself, operating state with stable laser, the output of light modulation drive circuit 324 also is connected with laser 311 in the optical device unit 31, for laser 311 provides modulated current, make the laser 311 can be according to the data-signal of input logic control circuit 322 and luminous.322 pairs of data input signals of logic control circuit carry out logic control with the shutoff control signal, and the shutoff control input end of logic control circuit 322 and bias drive circuit 325 is connected, turn-off in the external world under the effect of control signal, open simultaneously and rapidly or shutoff bias current and modulated current, thereby open or turn-off the light data-signal rapidly.Optical power control circuit 321 is subjected to the control of ambient light power control signal (from computer), and make the output area of optical power control circuit 321 adjustable, with the transmitting power of dynamic control laser 311, optical module can be matched with different distance place optical line terminal (OLT) light receiving part.
Optical receiving circuit unit 33 comprise the pre-amplification circuit that is linked in sequence 331 and after put shaping circuit 332, the input of pre-amplification circuit 331 is connected with photo-detector 312 in the optical device unit 31, after put the electrical data signal number that shaping circuit 332 is exported recovery.
Described optical device unit, light drive circuit unit, be arranged in the same optical module optical receiving circuit unit integral, thereby simplified the circuit and the light path design of system.
Referring to Fig. 4 and in conjunction with referring to Fig. 3, a kind of enforcement circuit of optical power control circuit 321 among Fig. 3 shown in the figure.Select an analog switch 41 and isolation buffer circuit 42 (operational amplifier U101A) formation that is linked in sequence by the individual reference voltage source VN1-VN4 of 4 (M=4), four.Four reference voltage source VN1-VN4 select an analog switch 41 to be connected with four, select an analog switch 41 by two optical power control signal controls four of outside input, be used for selecting of four reference voltages, selecteed reference voltage is delivered to isolation buffer circuit 42 and is carried out isolation drive, the output CIM of isolation buffer circuit 42 send the voltage-controlled current source of light modulation drive circuit 324, control modulation drive current.
Also combination is referring to Fig. 3 referring to Fig. 5, and a kind of enforcement circuit of logic control circuit 322 among Fig. 3 uses one group of PECL Digital Logic to finish the unlatching of data-signal, turn-off function shown in the figure.The differential data signals DATA that external circuit is sent into by dual input difference and the gate logic of PECL ,/DATA and difference turn-off control signal OFF ,/OFF carries out and operation, output PECL level be turned off control signal OFF ,/ data-signal DAT after the OFF modulation ,/DAT, this signal send light modulation drive circuit 324, the laser 311 emission light signals in the control optical device unit 31.Logic control circuit 322 utilizes the high speed characteristics of PECL Digital Logic, and the unlatching, turn-off time that make circuit are less than lns.
Referring to Fig. 6 and in conjunction with referring to Fig. 3, a kind of enforcement circuit of backlight control circuit 323 among Fig. 3 shown in the figure, the effect of backlight control circuit 323 is operating characteristic of laser 311 in the light stable device cell 31, promptly finishes the automatic biasing control of laser.Backlight control circuit 323 is by oppositely striding resistance amplifying circuit (N) 51, peak-detector circuit 52 that is connected and composed by triode Q30, resistance R 30 and capacitor C 30 and two-stage amplifier (+M) 53 formations that are linked in sequence.Oppositely stride resistance amplifying circuit 51 and receive the back facet current that pipe PIN backlight (313 among Fig. 3) exports, current signal is converted into voltage signal output, detect waveform peak by peak-detector circuit 52 again and deliver to two-stage amplifier 53 amplifications, the voltage signal CIB of two-stage amplifier 53 outputs is connected to the size of the voltage-controlled current source control laser bias current in the bias drive circuit 325.
Referring to Fig. 7 and in conjunction with referring to Fig. 3, a kind of enforcement circuit of light modulation drive circuit 324 among Fig. 3 shown in the figure, because circuit has adopted the mode of control laser drive current to control the light modulation electric current, even therefore laser is just luminous, light modulation drive circuit 324 also can dynamically be controlled the light emitting power of laser.Light modulation drive circuit 324 is connected to form by first resistance R 1, second resistance R 2, the first triode Q1, the second triode Q2 and first voltage-controlled current source 71.The first triode Q1 is connected logic control circuit 322 positives, reversed-phase output respectively with the base stage of the second triode Q2, reception differential data signals DAT ,/DAT, the first triode Q1 is connected first resistance R 1 and second resistance R 2 respectively with the collector electrode of the second triode Q2, first resistance R 1 connects power Vcc, the laser 311 (LD) that second resistance R 2 connects in the optical device unit 31.The first triode Q1 is connected with first voltage-controlled current source 71 with the emitter of the second triode Q2, the output signal CIM of the control end received optical power control circuit 321 of first voltage-controlled current source 71, make first voltage-controlled current source 71 be controlled by optical power control circuit 321, finish the function that control laser 311 (LD) sends the light data.
In the circuit, the first triode Q1 is the consistent high speed triode of a pair of parameter with the second triode Q2, have good symmetry, control one group of differential signal DAT that the amplitude from logic control circuit 322 is identical, phase place is opposite ,/DAT, have the switching speed that is exceedingly fast.
Referring to Fig. 8 and in conjunction with referring to Fig. 3, a kind of enforcement circuit of bias drive circuit 325 among Fig. 3 shown in the figure.Connect to form by the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, first capacitor C 1, the 4th triode Q4, the 5th triode Q5 and second voltage-controlled current source 81; The 4th triode Q4 is connected the logic control circuit positive respectively with the base stage of the 5th triode Q5, anti-phase shutoff control input end, receive difference and turn-off control signal OFF, / OFF, the collector electrode of the 4th triode Q4 is connected the 8th resistance R 8 respectively with the collector electrode of the 5th triode Q5, the 9th resistance R 9 and first capacitor C, 1 back connect power Vcc, the laser 311 (LD) that the collector electrode of the 5th triode Q5 also connects in the optical device unit by the tenth resistance R 10, the 4th triode Q4 is connected with second voltage-controlled current source 81 with the emitter of the 5th triode Q5, the control end of second voltage-controlled current source 81 receives the output signal CIB of backlight control circuit 323, make second voltage-controlled current source 81 be controlled by backlight control circuit 323, finish the function of control laser 311 (LD) bias current input.
Identical with light modulation drive circuit 324, the 4th triode Q4 as switch control is the consistent high speed triode of a pair of parameter with the 5th triode Q5, has good symmetry, the difference of controlling one group amplitude being identical, phase place is opposite turn-off control signal OFF ,/OFF, have the switching speed that is exceedingly fast.Difference turn-off control signal OFF ,/OFF and differential data signals DAT ,/DAT derives from same signal source, when data-signal turn-offs, bias current also can be turned off simultaneously, therefore during free of data, in the optical device unit 31 in the laser 311 almost no current pass through, the surplus light of being sent out is also minimum.
Referring to Fig. 9 and in conjunction with referring to Fig. 3, the enforcement circuit of pre-amplification circuit 331 in the light receiving unit 33 among Fig. 3 shown in the figure, constitute by striding resistance amplifying circuit 91 connection capacitance-resistance filter networks 92, capacitance-resistance filter network 92 is connected and composed by resistance R 21, R22 and capacitor C 21, C22.The input of striding resistance amplifying circuit 91 is connected with photo-detector 312 in the optical device unit 31, and photo-detector 312 output signals send capacitance-resistance filter network 92 to carry out filtering after amplification, export differential signal PIN ,/PIN.
Referring to Figure 10 and in conjunction with referring to Fig. 3, the enforcement circuit of rear shaping circuit 332 in the light receiving unit 33 among Fig. 3 shown in the figure, be used for the differential signal PIN after the preposition amplification filtering ,/PIN converts the output of PECL signal to.Connect and compose by amplitude limiting amplifier circuit 101 and PECL buffer circuit 102, output PECL level signal RD ,/RD.At present, it is existing many to finish the integrated circuit of putting shaping feature behind the normal mode signal, and Figure 10 circuit can be realized by a slice integrated chip.
In sum, the present invention organically is combined into one the optical drive transmitter unit of burst mode and the light receiving unit of continuous mode, not only reduced the volume of module, and in system applies, but the also circuit design of simplified system and light path design, simultaneously owing to used improved optical transmission circuit control technology, unlatching, the turn-off time of radiating circuit can be reduced to lns, the blocking interval luminous power is less than-70dBm, employed dynamic control technology, can make Laser emission power dynamic adjustable, use with the optical network unit (ONU) that is applicable to different distance.The circuit design of optical module of the present invention meets the requirement of ClassB in the ITU-TG.983 suggestion fully, and product can reach commercial requirement.
Claims (10)
1. single-fiber two-way integral optical module for burst transmission, comprise: one contains the optical device unit of laser and photo-detector at least, the electrical data signal of input number is converted into the light data-signal and controls the light drive circuit unit of laser in the optical device unit, with will revert to the optical receiving circuit unit of electrical data signal number by optical fiber input and by the light data-signal of photo-detector sensing in the optical device unit, it is characterized in that: described light drive circuit unit comprises optical power control circuit, logic control circuit, bias drive circuit and light modulation drive circuit; Described optical power control circuit is provided with the optical power control signal input, described logic control circuit is respectively equipped with data input pin and turn-offs the control input end, described bias drive circuit is provided with turn-offs the control input end, the shutoff control input end of logic control circuit is connected with the shutoff control input end of described bias drive circuit, optical power control circuit and logic control circuit output connect described light modulation drive circuit respectively, the common laser that connects in the described optical device unit of the output of described light modulation drive circuit and bias drive circuit is respectively laser modulated current and bias current is provided; Described optical device unit, light drive circuit unit, optical receiving circuit unit integral are arranged in the same module.
2. single-fiber two-way integral optical module for burst transmission according to claim 1, it is characterized in that: described optical device also includes pipe backlight in the unit, described light drive circuit also includes backlight control circuit in the unit, described pipe backlight connects described backlight control circuit, and the output of backlight control circuit connects described bias drive circuit.
3. single-fiber two-way integral optical module for burst transmission according to claim 2, it is characterized in that: described backlight control circuit is linked in sequence and constitutes by oppositely striding resistance amplifying circuit, peak-detector circuit and amplifier, described pipe backlight connects the input of oppositely striding the resistance amplifying circuit, and amplifier output is connected with described bias drive circuit.
4. single-fiber two-way integral optical module for burst transmission according to claim 1 and 2 is characterized in that: described optical power control circuit selects an analog switch and isolation buffer circuit to be linked in sequence by M reference voltage source, M to constitute; Described optical power control signal input is the control end that M selects an analog switch, and the output of isolation buffer circuit connects described light modulation drive circuit.
5. single-fiber two-way integral optical module for burst transmission according to claim 1 and 2, it is characterized in that: described logic control circuit is to finish data-signal to open, the PECL Digital Logical Circuits of turn-off function, comprise differential data signals DATA, / DATA makes the dual input difference AND with logical operation, difference is turn-offed control signal OFF, / OFF makes the dual input difference AND with logical operation, with the logical circuit that two ANDs output do operation back output is turned off the PECL level data signal of control signal modulation, this logical circuit has differential output signal positive terminal and end of oppisite phase DAT, / DAT, and be connected to described light modulation drive circuit.
6. single-fiber two-way integral optical module for burst transmission according to claim 1 and 2 is characterized in that: described light modulation drive circuit is connected to form by resistance R 1, resistance R 2, triode Q1, triode Q2 and first voltage-controlled current source; Triode Q1 is connected described logic control circuit positive, reversed-phase output respectively with the base stage of triode Q2, triode Q1 is connected resistance R 1 and resistance R 2 respectively with the collector electrode of triode Q2, resistance R 1 connects power Vcc, the laser that resistance R 2 connects in the described optical device unit, triode Q1 is connected with first voltage-controlled current source with the emitter of triode Q2, and the control end of first voltage-controlled current source connects the output of described optical power control circuit.
7. single-fiber two-way integral optical module for burst transmission according to claim 6 is characterized in that: described triode Q1 is the consistent high speed triode of a pair of parameter with triode Q2.
8. single-fiber two-way integral optical module for burst transmission according to claim 1 and 2 is characterized in that: described bias drive circuit is connected to form by resistance R 8, resistance R 9, resistance R 10, capacitor C 1, triode Q4, triode Q5 and second voltage-controlled current source; Triode Q4 is connected logic control circuit positive, anti-phase shutoff control input end respectively with the base stage of triode Q5, reception difference cut-off signals OFF ,/OFF, the collector electrode of triode Q4 connects power Vcc by resistance R 8, the collector electrode of triode Q5 connects power Vcc by resistance R 9 and capacitor C 1, the laser that the collector electrode of triode Q5 also connects in the described optical device unit by resistance R 10, triode Q4 is connected with second voltage-controlled current source with the emitter of triode Q5, and the control end of second voltage-controlled current source connects the output of backlight control circuit.
9. single-fiber two-way integral optical module for burst transmission according to claim 8 is characterized in that: described triode Q5 is the consistent high speed triode of a pair of parameter with triode Q6.
10. single-fiber two-way integral optical module for burst transmission according to claim 1 and 2 is characterized in that: described light receiving unit is connected and composed by pre-amplification circuit and rear shaping circuit; Described pre-amplification circuit connects the capacitance-resistance filter network and constitutes by striding the resistance amplifying circuit, strides the input of resistance amplifying circuit and is connected with photo-detector in the described optical device unit; Described rear shaping circuit is connected and composed by amplitude limiting amplifier circuit and PECL buffer circuit, PECL buffer circuit output PECL level data signal.
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| CNB001006797A CN1147075C (en) | 2000-01-27 | 2000-01-27 | Single-fiber two-way integral optical module for burst transmission |
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| CNB001006797A CN1147075C (en) | 2000-01-27 | 2000-01-27 | Single-fiber two-way integral optical module for burst transmission |
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| CN108900252A (en) * | 2018-07-23 | 2018-11-27 | 中天宽带技术有限公司 | A kind of optical network unit and passive optical-fiber network of power adjustable |
| CN109347564A (en) * | 2018-11-29 | 2019-02-15 | 青岛海信宽带多媒体技术有限公司 | A kind of optical module |
| CN113541804A (en) * | 2020-04-17 | 2021-10-22 | 青岛海信宽带多媒体技术有限公司 | Optical module |
-
2000
- 2000-01-27 CN CNB001006797A patent/CN1147075C/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101938677A (en) * | 2010-09-25 | 2011-01-05 | 索尔思光电（成都）有限公司 | 10G EPON (Ethernet Passive Optical Network) single-fiber bidirectional energy-saving optical module |
| CN101938677B (en) * | 2010-09-25 | 2012-12-12 | 索尔思光电（成都）有限公司 | 10G EPON (Ethernet Passive Optical Network) single-fiber bidirectional energy-saving optical module |
| US9419706B2 (en) | 2011-05-05 | 2016-08-16 | Huawei Technologies Co., Ltd. | Single fiber bi-directional optical module, and transport system and method based thereon |
| CN103067076A (en) * | 2012-12-27 | 2013-04-24 | 武汉华工正源光子技术有限公司 | Detection circuit of optical module burst luminous power |
| CN107356937A (en) * | 2017-08-25 | 2017-11-17 | 长春德信光电技术有限公司 | A kind of walking robot collision warning device based on Laser Detection Technique |
| CN108900252A (en) * | 2018-07-23 | 2018-11-27 | 中天宽带技术有限公司 | A kind of optical network unit and passive optical-fiber network of power adjustable |
| CN108900252B (en) * | 2018-07-23 | 2021-04-06 | 中天宽带技术有限公司 | Power-adjustable optical network unit and passive optical network |
| CN109347564A (en) * | 2018-11-29 | 2019-02-15 | 青岛海信宽带多媒体技术有限公司 | A kind of optical module |
| CN109347564B (en) * | 2018-11-29 | 2021-07-23 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN113541804A (en) * | 2020-04-17 | 2021-10-22 | 青岛海信宽带多媒体技术有限公司 | Optical module |
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|---|---|
| CN1147075C (en) | 2004-04-21 |
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