CN204597973U - Optical fiber communication experimental optical receiver module - Google Patents
Optical fiber communication experimental optical receiver module Download PDFInfo
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- CN204597973U CN204597973U CN201520308015.4U CN201520308015U CN204597973U CN 204597973 U CN204597973 U CN 204597973U CN 201520308015 U CN201520308015 U CN 201520308015U CN 204597973 U CN204597973 U CN 204597973U
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Abstract
The utility model provides a kind of optical fiber communication experiment Optical Receivers, comprise photoelectric switching circuit, see-saw circuit, automatic pressing control gain amplifying circuit and ultra high speed A/D conversion circuit, wherein: described photoelectric switching circuit is for receiving the light signal of outside input, and be converted to the signal of telecommunication, then the signal of telecommunication after conversion is input to described see-saw circuit; The signal of telecommunication amplifies output through described see-saw circuit, is input to described automatic pressing control gain amplifying circuit; Electrical signal gain amplifies and exports by described automatic pressing control gain amplifying circuit, is input to described ultra high speed A/D conversion circuit; Analog electrical signal is converted to digital electric signal for output by described ultra high speed A/D conversion circuit.This optical fiber communication experimental optical receiver module can realize optical receiving end automatic gain and amplify, and the function that the gain of amplification can be regulated again voluntarily to amplify is selected, and amplifying signal is stable without High-frequency Interference.
Description
Technical field
The utility model belongs to optical fiber communication technical field of experiment equipment, particularly relates to a kind of optical fiber communication experimental optical receiver module.
Background technology
Optical fiber communication utilizes fiber optic transmission signal, to realize a kind of communication mode that information is transmitted.Optical fiber communication is compared with telecommunication, have the following advantages: transmission frequency bandwidth, loss are low, loss evenly and not by temperature impact, antijamming capability is strong, fidelity is high, the host-host protocol of the high speed serialization ability that it adopts, has high reliability, high bandwidth, feature that real-time is high.Just so, optical fiber telecommunications system becomes major flow communication system gradually.
At present, China has built up backbone network based on fiber optic network and metropolitan area network.Along with the propelling that local fiber network and 4G mobile communication fiber optic network are built, the fiber optic communication field of China also has very large development space.Thus the be correlated with demand of the talent of optical fiber communication is also increasing, and each colleges and universities also pay attention to for optical fiber communication education thereupon.Along with each colleges and universities offering optical fiber communication experimental courses, the experimental facilities demand of associated optical fiber communication is also increasing, and wherein stablize, realize the light-receiving end of convert of optical fiber communication experimental facilities of modulus signal conversion demand is large especially for receptivity.
Wherein, current optical fiber communication experiment optical receiving end is just merely as the receiving-member of light signal, just the light signal received directly is amplified, gain factor is relatively fixing, can not select the gain of light signal mode of amplifying, cannot realize optical receiving end and both can give tacit consent to automatic gain amplification, the function that the gain of amplification can be regulated again voluntarily to amplify is selected.
Utility model content
In view of this, the utility model embodiment object is to provide a kind of optical fiber communication experimental optical receiver module can selected the gain of light signal mode of amplifying.
The utility model provides a kind of optical fiber communication experiment Optical Receivers, comprise photoelectric switching circuit, see-saw circuit, automatic pressing control gain amplifying circuit and ultra high speed A/D conversion circuit, wherein: described photoelectric switching circuit is for receiving the light signal of outside input, and be converted to the signal of telecommunication, then the signal of telecommunication after conversion is input to described see-saw circuit; The signal of telecommunication amplifies output through described see-saw circuit, is input to described automatic pressing control gain amplifying circuit; Electrical signal gain amplifies and exports by described automatic pressing control gain amplifying circuit, is input to described ultra high speed A/D conversion circuit; Analog electrical signal is converted to digital electric signal for output by described ultra high speed A/D conversion circuit.
Further, described photoelectric switching circuit also comprises the positive voltage voltage-controlled circuit be connected with described automatic pressing control gain amplifying circuit.
Further, the junction of described positive voltage voltage-controlled circuit and described automatic pressing control gain amplifying circuit is furnished with sensing point.
Further, described positive voltage voltage-controlled circuit comprises PNP triode and NPN triode, and the collector electrode of PNP triode and the collector electrode of NPN triode link together, and are furnished with sensing point.
Further, described photoelectric switching circuit also comprises the bucking voltage voltage stabilizing circuit be connected with described automatic pressing control gain amplifying circuit.
Further, described bucking voltage voltage stabilizing circuit comprises three-terminal voltage regulator and potentiometer, and potentiometer is connected to the reference voltage pin place of three-terminal voltage regulator.
Further, described photoelectric switching circuit comprises photodiode, and its pin 2 is connected with decoupling capacitor.
Further, described see-saw circuit is connected with negative feedback resistor, and output is furnished with sensing point.
Further, the output of described ultra high speed A/D conversion circuit is furnished with sensing point.
Optical fiber communication experimental optical receiver module in the utility model can realize optical receiving end automatic gain and amplify, and the function that the gain of amplification can be regulated again voluntarily to amplify is selected, and amplifying signal is stable without High-frequency Interference.
Accompanying drawing explanation
Fig. 1 is the structural representation of optical fiber communication experimental optical receiver module provided by the utility model.
Fig. 2 is the circuit theory diagrams of optical fiber communication experimental optical receiver module provided by the utility model.
Drawing reference numeral illustrates:
1, photoelectric switching circuit; 2, bucking voltage voltage stabilizing circuit;
3, positive voltage voltage-controlled circuit; 4, negative feedback see-saw circuit;
51-54 sensing points; 6, automatic pressing control gain amplifying circuit;
7, ultra high speed A/D conversion circuit; 8, potentiometer.
Embodiment
Below in conjunction with accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.The assembly of the utility model embodiment describing and illustrate in usual accompanying drawing herein can be arranged with various different configuration and design.Therefore, below to the detailed description of the embodiment of the present utility model provided in the accompanying drawings and the claimed scope of the present utility model of not intended to be limiting, but selected embodiment of the present utility model is only represented.Based on embodiment of the present utility model, the every other embodiment that those skilled in the art obtain under the prerequisite not making creative work, all belongs to the scope of the utility model protection.
Refer to Fig. 1, the utility model embodiment provides a kind of optical fiber communication experimental optical receiver module 9, comprising: photoelectric switching circuit 1, bucking voltage voltage stabilizing circuit 2, positive voltage voltage-controlled circuit 3, see-saw circuit 4, automatic pressing control gain amplifying circuit 6, ultra high speed A/D conversion circuit 7 and potentiometer 8.
Concrete, in the present embodiment, described photoelectric switching circuit 1, by described optical fiber pigtail, receives the light signal of outside input, and is converted to the signal of telecommunication, be input to described see-saw circuit 3; The signal of telecommunication amplifies output through described see-saw circuit 3, is input to described automatic pressing control gain amplifying circuit 6; Electrical signal gain amplifies and exports by described automatic pressing control gain amplifying circuit 6, is input to described ultra high speed A/D conversion circuit 7; Analog electrical signal is converted to digital electric signal by described ultra high speed A/D conversion circuit 7, and transfers to described metal optical cable port, and the signal of telecommunication outwards transmits through described metal optical cable port.
Concrete, in the present embodiment, adopt automatic pressing control gain amplifying circuit 6, signal can amplify by automatic gain, can regulate amplification voluntarily again.Light signal is first converted into the signal of telecommunication by Optical Receivers 9, after through negative feedback see-saw circuit enlarge leadingly, be input to automatic pressing control gain amplifying circuit 6 again, by the Optimal Signals that automatic pressing control gain amplifying circuit output waveform can be made regulator potentiometer level and smooth, complete waveforms detection adjustment, be reduced into than more complete waveform signal so as to carry out next step pattern detect, differentiate, decoding.
Further, in described Optical Receivers 9, power supply coupling capacitor is all arranged in each element and circuit anode input, can prevent vibration, and impulsive noise is switched to ground; Can play energy storage effect in addition, can prevent circuit power consumption from increasing suddenly, supply voltage moment is dragged down, and produces noise and ring.
Further, described photoelectric switching circuit 1 comprises photodiode, and its pin 2 is connected to decoupling capacitor in parallel.
Further, described bucking voltage voltage stabilizing circuit 2 comprises three-terminal voltage regulator and potentiometer, potentiometer is connected to the reference voltage pin place of three-terminal voltage regulator, the Optimal Signals that described automatic pressing control gain amplifying circuit output waveform can be made level and smooth by regulator potentiometer.
Further, described positive voltage voltage-controlled circuit 3 comprises PNP triode and NPN triode, and the collector electrode of PNP triode and the collector electrode of NPN triode link together, and arrange described sensing point 54.
Further, described see-saw circuit 4 comprises negative-feedback circuit, and stablize amplifying signal, output is furnished with sensing point, and negative-feedback circuit can play raising gain stability in addition, reduces nonlinear distortion, suppresses the effect of noise in feedback loop.
Further, described automatic pressing control gain amplifying circuit 6,-11dB can be reached to+31dB gain at 90MHz bandwidth place, in 9MHz bandwidth, place can reach 9dB to 51dB gain, its pin 2 is connected to described bucking voltage voltage stabilizing circuit 2, pin 1 is connected to described positive voltage voltage-controlled circuit 3, and output is furnished with described sensing point 54.
Further, PNP triode 2N3906 in described positive voltage voltage-controlled circuit 3 is connected with the collector electrode of NPN triode 2N3904, voltage is Vagc (automatic gain control voltage) herein, when rectified current between these two triodes is uneven, Vagc can increase voluntarily, thus makes described automatic pressing control gain amplifying circuit 6 be that output gain increases.
Further, described ultra high speed A/D conversion circuit 7, it is voltage comparator, there is 8ns time delays, the power consumption of 18mW/+5V, separable analog signal and digital signal, analog signal power consumption range is+5V to+10V or ± 5V, TTL compatible exports, and TTL compatible latches input, is furnished with described sensing point 53 between its output and metal optical cable port.
Further, in the present embodiment, Optical Receivers 9 has multistage sensing point 51-54, has 4 sensing point 51-54, and each sensing point can play signal observation, aided education and channel check effect, wherein:
Sensing point 51 is positioned at described see-saw circuit 4 output, by sensing point 51, signal observation can be carried out to negative feedback see-saw circuit 4, understand the signal magnification ratio of negative feedback see-saw circuit, the gain performance inspection effect to amplifier can be played simultaneously, for digital signal, the wave form varies of observable signal;
Sensing point 52 is positioned at described automatic pressing control gain amplifying circuit 6 output, by sensing point 52, signal observation can be carried out to automatic pressing control gain amplifying circuit 6, can contrast with sensing point 1 signal simultaneously, play the effect of detecting amplifier signal gain performance, adjustable potentiometer carries out the adjustment of gain amplifying signal in addition, obtains the optimum output signal that waveform is level and smooth, modulation intelligence is complete;
Sensing point 53 is arranged in described automatic pressing control gain amplifying circuit 6 pin 1 and joins with described positive voltage voltage-controlled circuit 3 collector electrode and hold, by sensing point 53, signal observation can be carried out to ultra high speed A/D conversion circuit 7, observe digital signal waveform, can contrast with the analog signal of sensing point 52 simultaneously, help learning simulation signal and digital signal transfer process feature and digital signal pattern feature;
Sensing point 54 is between described ultra high speed A/D conversion circuit 7 output and described metal optical cable port, by sensing point 54, signal observation can be carried out to positive voltage voltage-controlled circuit 3, measure the feedback signal in positive voltage voltage-controlled circuit, can play simultaneously and performance checking effect is controlled to the gain of positive voltage voltage-controlled circuit 3.
Optical Receivers 9 in the present embodiment is when coming into operation, can carry out according to the following step: inspection, debug circuit: check that whether the signal wiring of photoelectric switching circuit, bucking voltage voltage stabilizing circuit, positive voltage voltage-controlled circuit, negative feedback see-saw circuit, sensing point, automatic pressing control gain amplifying circuit, ultra high speed A/D conversion circuit, optical fiber pigtail, power circuit is normal, if there is exception, corrected.
In order to further optimization, accurate observation the utility model internal signal waveforms, as preferably, adopts 20M dual trace oscilloscope.
In sum, compared with the light transmitting terminal of existing fiber communication experiment case, the utility model has following beneficial effect:
1. compared to prior art, the light transmitting terminal of existing optical fiber communication experiment is just merely defined as the transmit block of light signal, the external relative closure of optical receiving end interior lights signal in design, cannot effectively observe light signal receiving terminal internal signal, thus transmission situation and the photoelectric conversion process of optical receiving end light signal at different levels can not be understood, more effectively cannot carry out experimental teaching, also cannot realize fast optical receiving end inspection and maintenance simultaneously; Scheme of the present utility model arranges multistage sensing point 51-54, effectively observes signal at different levels, helps to understand the problems in teaching such as photoelectric signal transformation, Signal transmissions amplification and the conversion of digital signal analog signal, and realizes fast channel check at different levels and maintenance;
2. adopt automatic pressing control gain amplifying circuit, signal both can amplify by automatic gain, can regulate amplification voluntarily again, and amplifying signal is stable without High-frequency Interference;
3. structure understands, experimental implementation is strong, and applicability is strong, and incoming light signal can realize photoelectric signal transformation and digital signal analog signal is changed.
Although more employ circuit Essential Terms herein, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present utility model more easily; The restriction that they are construed to any one additional is all contrary with the utility model spirit.
Claims (9)
1. an optical fiber communication experimental optical receiver module, is characterized in that, comprises photoelectric switching circuit, see-saw circuit, automatic pressing control gain amplifying circuit and ultra high speed A/D conversion circuit, wherein:
Described photoelectric switching circuit for receiving the light signal of outside input, and is converted to the signal of telecommunication, then the signal of telecommunication after conversion is input to described see-saw circuit;
The signal of telecommunication amplifies output through described see-saw circuit, is input to described automatic pressing control gain amplifying circuit;
Electrical signal gain amplifies and exports by described automatic pressing control gain amplifying circuit, is input to described ultra high speed A/D conversion circuit;
Analog electrical signal is converted to digital electric signal for output by described ultra high speed A/D conversion circuit.
2. optical fiber communication experimental optical receiver module according to claim 1, is characterized in that, described photoelectric switching circuit also comprises the positive voltage voltage-controlled circuit be connected with described automatic pressing control gain amplifying circuit.
3. optical fiber communication experimental optical receiver module according to claim 2, is characterized in that, the junction of described positive voltage voltage-controlled circuit and described automatic pressing control gain amplifying circuit is furnished with sensing point.
4. optical fiber communication experimental optical receiver module according to claim 2, it is characterized in that, described positive voltage voltage-controlled circuit comprises PNP triode and NPN triode, and the collector electrode of PNP triode and the collector electrode of NPN triode link together, and are furnished with sensing point.
5. optical fiber communication experimental optical receiver module according to claim 1, is characterized in that, described photoelectric switching circuit also comprises the bucking voltage voltage stabilizing circuit be connected with described automatic pressing control gain amplifying circuit.
6. optical fiber communication experimental optical receiver module according to claim 5, is characterized in that, described bucking voltage voltage stabilizing circuit comprises three-terminal voltage regulator and potentiometer, and potentiometer is connected to the reference voltage pin place of three-terminal voltage regulator.
7. optical fiber communication experimental optical receiver module according to claim 1, it is characterized in that, described photoelectric switching circuit comprises photodiode, and its pin 2 is connected with decoupling capacitor.
8. optical fiber communication experimental optical receiver module according to claim 1, it is characterized in that, described see-saw circuit is connected with negative feedback resistor, and output is furnished with sensing point.
9. optical fiber communication experimental optical receiver module according to claim 1, is characterized in that, the output of described ultra high speed A/D conversion circuit is furnished with sensing point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520308015.4U CN204597973U (en) | 2015-05-13 | 2015-05-13 | Optical fiber communication experimental optical receiver module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520308015.4U CN204597973U (en) | 2015-05-13 | 2015-05-13 | Optical fiber communication experimental optical receiver module |
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| CN204597973U true CN204597973U (en) | 2015-08-26 |
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| CN201520308015.4U Expired - Fee Related CN204597973U (en) | 2015-05-13 | 2015-05-13 | Optical fiber communication experimental optical receiver module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790746A (en) * | 2016-04-13 | 2016-07-20 | 华中科技大学 | Digital signal fiber transmission triggering system |
| CN107317650A (en) * | 2017-07-03 | 2017-11-03 | 华南师范大学 | Device, method and system for time-division division multiplex fibre-optic communication wave experimental teaching |
-
2015
- 2015-05-13 CN CN201520308015.4U patent/CN204597973U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790746A (en) * | 2016-04-13 | 2016-07-20 | 华中科技大学 | Digital signal fiber transmission triggering system |
| CN105790746B (en) * | 2016-04-13 | 2019-01-18 | 华中科技大学 | A kind of digital signal optical fiber transmission triggering system |
| CN107317650A (en) * | 2017-07-03 | 2017-11-03 | 华南师范大学 | Device, method and system for time-division division multiplex fibre-optic communication wave experimental teaching |
| CN107317650B (en) * | 2017-07-03 | 2019-04-19 | 华南师范大学 | Device, method and system for time-division division multiplex fibre-optic communication wave experimental teaching |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20160513 |