CN103731206B - The test device of optical module communication bit error rates and sensitivity - Google Patents
The test device of optical module communication bit error rates and sensitivity Download PDFInfo
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Abstract
The invention discloses the test device of a kind of optical module communication bit error rates and sensitivity, it is connected with optical transceiver module to be measured, including: the signal of telecommunication drives distribution and selection circuit, Error detection circuit, optical transceiver module circuit, luminous power detection and attenuation control circuit, optical signal driving distribution and selection circuit and control circuit；This control circuit controls the signal of telecommunication respectively and drives distribution and the selection circuit output passage of the signal of telecommunication, optical signal to drive in distribution and the selection circuit output passage of optical signal, luminous power detection and attenuation control circuit the attenuation of optical signal and the Error detection electric circuit inspection bit error rate and sensitivity.The present invention can test the signal that multichannel light module difference passage transmits simultaneously, it is to avoid needs repeatedly to plug the problem of test optical fiber luminous power in the optical module bit error rate, sensitivity and luminous power test process, improves testing efficiency and test result reliability.
Description
Technical field
The present invention relates to optical communication field, particularly relate to the test device of a kind of optical module communication bit error rates and sensitivity.
Background technology
Along with the communication system raising to optical module transfer rate and capacity requirement, high-capacity and high-speed optical module is developed rapidly, wherein the multichannel light module such as four-way pluggable (QuadSmallForm-factorPluggable, QSFP), CFP is because cost performance is high, is widely used.Multichannel light module needs to test the photoelectricity index of each passage simultaneously, in order to carry out multiple channel test simultaneously, need to adopt many set single channel test equipment or multi-path-apparatus and light power meter, attenuator, oscillograph to combine realization test, single channel and the multiple channel test functions of the equipments of well-known instrument producer are complicated and expensive, the test of multichannel light module mainly has the bit error rate, sensitivity, eye pattern etc., wherein Error Detector, oscillograph are relatively costly, but need repeatedly to use in production test.The size utilizing optical attenuator to adjust input optical power is needed when testing optical module sensitivity, find the minimum input optical power meeting test bit error rate requirement, these test processs are required for the often plug optical fiber luminous power size for testing in this kind of situation, and repeatedly plug optical fiber can affect test accuracy and testing efficiency.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is in that to provide the test device of a kind of optical module communication bit error rates and sensitivity, can avoid repeatedly plugging optical fiber, improves testing efficiency and test result reliability.
For solving above-mentioned technical problem, the technical scheme is that and be achieved in that:
The test device of a kind of optical module communication bit error rates and sensitivity, is connected with optical transceiver module to be measured, comprising:
The signal of telecommunication drives distribution and selection circuit, a passage is divided into plurality of passages, and can export the signal of telecommunication in selector channel, and this signal of telecommunication drives distribution and selection circuit to be connected with this optical transceiver module to be measured；
Error detection circuit, produces and detects the error code signal of telecommunication, and this Error detection circuit drives distribution and selection circuit to be connected with this signal of telecommunication；
Optical transceiver module circuit, for the conversion between optical signal and the signal of telecommunication, this optical transceiver module circuit drives distribution and selection circuit to be connected with this signal of telecommunication；
Luminous power detection and attenuation control circuit, for the detection of luminous power and optical signal is decayed, the detection of this luminous power and attenuation control circuit are connected with this optical transceiver module circuit；
Optical signal drives distribution and selection circuit, and a passage is divided into plurality of passages, and can selector channel output optical signal, this optical signal drives distribution and selection circuit to be connected with the detection of this luminous power and attenuation control circuit and optical transceiver module to be measured respectively；
Control circuit, connecting this signal of telecommunication respectively drives distribution and selection circuit, optical signal to drive distribution and selection circuit, luminous power detection and attenuation control circuit and Error detection circuit, and this control circuit controls the signal of telecommunication respectively and drives distribution and the selection circuit output passage of the signal of telecommunication, optical signal to drive the attenuation of optical signal in distribution and the selection circuit output passage of optical signal, luminous power detection and attenuation control circuit and the Error detection electric circuit inspection bit error rate and sensitivity.
Preferably, the described signal of telecommunication drives distribution and selection circuit to include:
Electric channel selection circuit, this electric channel selection circuit connects the electric outfan of this optical transceiver module to be measured, optical transceiver module circuit and Error detection circuit respectively；This electric channel selection circuit receives the signal of telecommunication of this optical transceiver module to be measured output or the signal of telecommunication of this optical transceiver module circuit output, and under the control of described control circuit the selector channel output signal of telecommunication to this Error Detector testing circuit；
The signal of telecommunication drives distributor circuit, and this signal of telecommunication drives distributor circuit to connect the electrical input of this optical transceiver module to be measured, Error detection circuit and optical transceiver module circuit respectively；This signal of telecommunication drives distributor circuit to receive the error code signal of telecommunication of Error detection circuit output, and exports to this optical transceiver module to be measured or optical transceiver module circuit.
Preferably, the test device of described optical module communication bit error rates and sensitivity also includes signal of telecommunication input interface and electrical signal output interface, being connected this signal of telecommunication input interface between this electric channel selection circuit and electric outfan of optical transceiver module to be measured, this signal of telecommunication drives and is connected this electrical signal output interface between distributor circuit and the electrical input of optical transceiver module to be measured.
Preferably, the detection of described luminous power and attenuation control circuit include:
Input optical power detection and attenuation control circuit, the detection of this input optical power and attenuation control circuit connect this optical transceiver module circuit and control circuit respectively；Under the control of this control circuit, the detection of this input optical power and attenuation control circuit are to attenuated optical signal, and input the optical signal after decay to this optical transceiver module circuit；
Output optical power detection and attenuation control circuit, the detection of this Output optical power and attenuation control circuit connect this optical transceiver module circuit and control circuit respectively；Under the control of this control circuit, this input optical power detection and attenuation control circuit by receive by the attenuated optical signal of optical transceiver module circuit transmission.
Preferably, described optical signal drives distribution and selection circuit to include:
Optical channel selection circuit, this optical channel selection circuit connects the light output end of this control circuit, input optical power detection and attenuation control circuit, Output optical power detection and attenuation control circuit and optical transceiver module to be measured respectively；This optical channel selection circuit selector channel receives the optical signal of this optical transceiver module to be measured input, and under the control of this control circuit, selector channel outputs optical signals to the detection of this input optical power and attenuation control circuit or Output optical power detection and attenuation control circuit；
Optical signal drives distributor circuit, and this optical signal drives distributor circuit to connect the light input end of the detection of this Output optical power and attenuation control circuit and optical transceiver module to be measured respectively；This optical signal driving distributor circuit receives the optical signal after the decay of the detection of this Output optical power and attenuation control circuit, and exports to this optical transceiver module to be measured.
Preferably, the test device of described optical module communication bit error rates and sensitivity also includes optical signal input interface and optical signal output interface, this optical channel selection circuit is connected this optical signal input interface with the light output end of optical transceiver module to be measured, and this optical signal drives distributor circuit to be connected this optical signal output interface with the light input end of optical transceiver module to be measured.
Preferably, the test device of described optical module communication bit error rates and sensitivity also includes communication interface, and this control circuit receives control instruction by described communication interface.
Preferably, described control circuit is singlechip controller.
The technique effect that the present invention reaches is as follows:
1, the present invention can test the signal that multichannel light module difference passage transmits simultaneously, it is to avoid needs repeatedly to plug the problem of test optical fiber luminous power in the optical module bit error rate, sensitivity and luminous power test process, improves testing efficiency and test result reliability.
2, the present invention supports optical signal, the signal of telecommunication and photoelectricity hybrid test pattern, reduces the demand to external instrument.
3, the present invention disposable can complete the test of each channel bit error rate of optical module, sensitivity index, decreases operating process and optical link connects, it is simple to large-scale production testing and control.
4, measurement data can be exported by control circuit and be analyzed research to upper terminal, improved thus improving product quality and performances by the present invention easily, simultaneously because can provide the communication interface receiving PC control instruction, it is possible to test for the production automation.
Accompanying drawing explanation
Fig. 1 is the construction module figure of the test device of optical module communication bit error rates of the present invention and sensitivity；
Fig. 2 is the concrete structure schematic diagram of the test device of optical module communication bit error rates of the present invention and sensitivity；
Fig. 3 is the electrical block diagram of first embodiment of the invention；
Fig. 4 is the electrical block diagram of second embodiment of the invention；
Fig. 5 is the electrical block diagram of third embodiment of the invention；
Fig. 6 is the electrical block diagram of fourth embodiment of the invention.
[symbol description]
The signal of telecommunication drives distribution and selection circuit 1
Electric channel selection circuit 11
The signal of telecommunication drives distributor circuit 12
Error detection circuit 2
Optical transceiver module circuit 3
Luminous power detection and attenuator circuit 4
Input optical power detection and attenuator circuit 41
Output optical power detection and attenuator circuit 42
Optical signal drives distribution and selection circuit 5
Optical channel selection circuit 51
Optical signal drives distributor circuit 52
Control circuit 6
Communication interface 7
Signal of telecommunication input interface 81
Electrical signal output interface 82
Optical signal input interface 91
Optical signal output interface 92
Optical transceiver module 100 to be measured
Electrical input 101
Electricity outfan 102
Light input end 103
Light input end 104.
Detailed description of the invention
As it is shown in figure 1, the test device signal of telecommunication of optical module communication bit error rates of the present invention and sensitivity drives distribution and selection circuit 1, Error detection circuit 2, optical transceiver module circuit 3, luminous power detection and attenuation control circuit 4, optical signal driving distribution and selection circuit 5 and control circuit 6.
Wherein, the signal of telecommunication drives distribution and selection circuit 1 that a passage can be divided into plurality of passages, and can export the signal of telecommunication in selector channel, and this signal of telecommunication drives distribution and selection circuit 1 to be connected (as shown in Figure 3) with optical transceiver module 100 to be measured.
Error detection circuit 2 can produce the error code signal of telecommunication and export, it is possible to receives the error code signal of telecommunication and detects, and this Error detection circuit 2 drives distribution and selection circuit 1 to be connected with this signal of telecommunication.
Wherein, Error detection circuit is generally by " pseudo-random binary sequence (PseudoRandomBinarySequence; PRBS) pattern generator, PRBS code detectors, signal driving amplifier form, and PRBS pattern generator is responsible for producing for the pseudo-random binary sequence signal needed for the bit error rate and sensitivity test and being modulated into output after modulation signal is driven by signal driving amplifier.PRBS code detectors is responsible for detecting the signal received and adding up number of bit errors.PRBS code detectors counting can be controlled by software and carry out the statistical system bit error rate.
PRBS pattern generator, PRBS code detectors can be realized by chips such as chip SI5040, VSC8248 of occurring with PRBS pattern and detect, can realize Error detection Bit Error Ratio Measurement under the control of control circuit easily.
Optical transceiver module circuit 3 is for the conversion between optical signal and the signal of telecommunication, and this optical transceiver module circuit 3 drives distribution and selection circuit 1 to be connected with this signal of telecommunication.
Luminous power detection and attenuation control circuit 4 are used for the detection of luminous power and optical signal are decayed, and the detection of this luminous power and attenuation control circuit 4 are connected with this optical transceiver module circuit 3.
Optical signal drives distribution and selection circuit 5 that a passage is divided into plurality of passages, and can selector channel output optical signal, this optical signal drives distribution and selection circuit 5 to be connected (as shown in Figure 3) with the detection of this luminous power and attenuation control circuit 4 and optical transceiver module to be measured 100 respectively.
Control circuit 6 connects this signal of telecommunication respectively and drives distribution and selection circuit 1, optical signal to drive distribution and selection circuit 5, luminous power detection and attenuation control circuit 4 and Error detection circuit 2, and this control circuit 6 controls that the signal of telecommunication drives distribution and selection circuit 1 to export the passage of the signal of telecommunication, optical signal drives distribution and selection circuit 5 to export the passage of optical signal, luminous power detects respectively and in attenuation control circuit 4, the attenuation of optical signal and Error detection circuit 2 detect the bit error rate and sensitivity.
As in figure 2 it is shown, present invention additionally comprises communication interface 7, signal of telecommunication input interface 81, electrical signal output interface 82, optical signal input interface 91 and optical signal output interface 92.
The signal of telecommunication drives distribution and selection circuit to include electric channel selection circuit 11 and the signal of telecommunication drives distributor circuit 12.Wherein, this electric channel selection circuit 11 connects the electric outfan 102 of this optical transceiver module 100 to be measured by signal of telecommunication input interface 81, and is also respectively connected with optical transceiver module circuit 3 and Error detection circuit 2.This electric channel selection circuit 11 receives the signal of telecommunication of this optical transceiver module 100 to be measured output or the signal of telecommunication of this optical transceiver module circuit 3 output, and under the control of described control circuit 6 the selector channel output signal of telecommunication to this Error Detector testing circuit 2.This signal of telecommunication drives distributor circuit 12 to connect the electrical input 101 of this optical transceiver module 100 to be measured by electrical signal output interface 82, and is also respectively connected with Error detection circuit 2 and optical transceiver module circuit 3.This signal of telecommunication drives distributor circuit 12 to receive the error code signal of telecommunication of Error detection circuit 2 output, and exports to this optical transceiver module 100 to be measured or optical transceiver module circuit 3.
Wherein, the main devices of electric channel selection circuit 11 is 1xN passage electric switch, it is possible to realized by high frequency mechanical switch, it is also possible to realized by high frequency electronic switch, such as chips such as SI5368, under the control of single-chip microcomputer, in that context it may be convenient to select the conducting of respective channel.
The signal of telecommunication drives the main devices of distributor circuit 12 to be 1:N passage signal of telecommunication buffer chip, such as chips such as HMC987, under the control of single-chip microcomputer, in that context it may be convenient to realize 1 point of N multichannel output.
The detection of described luminous power and attenuation control circuit 4 include input optical power detection and attenuation control circuit 41 and Output optical power detection and attenuation control circuit 42.The detection of this input optical power and attenuation control circuit 41 connect this optical transceiver module circuit 3 and control circuit 6 respectively.Under the control of this control circuit 6, the detection of this input optical power and attenuation control circuit 41 are to attenuated optical signal, and input the optical signal after decay to this optical transceiver module circuit 3.The detection of this Output optical power and attenuation control circuit 42 connect this optical transceiver module circuit 3 and control circuit 6 respectively.Under the control of this control circuit 6, the optical signal transmitted by optical transceiver module circuit 3 received is decayed by the detection of this input optical power and attenuation control circuit 42.
Wherein, the operation principle of input optical power detection and attenuation control circuit 41 and Output optical power detection and attenuation control circuit 42 is: for reducing the impact on main fiber passage, the fiber coupler luminous power of decoupling 1% from main fiber passage that generally can adopt 1% detects for luminous power, photoelectric current can be converted optical signal into by photoelectric device, the linear amplification to electric current is realized again through linear amplifier MAX4476 etc., owing to luminous power exists linear relationship with the photoelectric current changed out, therefore the luminous power in main fiber passage can be conversed by the size of current that measurement obtains.Main fiber passage seals in micro machine optical attenuator, by the attenuation of control circuit 6 control micro electric machine optical attenuator, in that context it may be convenient to the output signal strength of modulation main fiber passage.
Described optical signal drives distribution and selection circuit 5 to include optical channel selection circuit 51 and optical signal drives distributor circuit 52.This optical channel selection circuit 51 connects the light output end 104 of this control circuit 6, input optical power detection and attenuation control circuit 41, Output optical power detection and attenuation control circuit 42 and optical transceiver module to be measured 100 respectively.This optical channel selection circuit 51 receives the optical signal of optical transceiver module 100 to be measured input by optical signal input interface 91, and under the control of this control circuit 6, selector channel outputs optical signals to the detection of this input optical power and attenuation control circuit 41 or Output optical power detection and attenuation control circuit 42.This optical signal drives distributor circuit 52 to connect the light input end 103 of the detection of this Output optical power and attenuation control circuit 42 and optical transceiver module to be measured 100 respectively.This optical signal driving distributor circuit 52 receives the optical signal after the detection of this Output optical power and attenuation control circuit 42 decay, and is exported to this optical transceiver module 100 to be measured by light signal output end 92.
Wherein, control circuit 6 is connected with personal computer (PersonalComputer, PC) by communication interface 7, can receive control instruction, it is possible to test for the production automation.It is analyzed research additionally, measurement data can be exported by control circuit 6 to upper terminal, is improved thus improving product quality and performances.Described control circuit 6 can be singlechip controller.
The modulation code signal of telecommunication of the present invention can support that optical signal output interface 92, electrical signal output interface 82 export simultaneously.
In the optical module bit error rate and sensitivity test, the reception error code after transmitting in communication line typically by statistics PRBS code modulation signal is tested.
PRBS code modulation signal produced by Error detection circuit 2 is input to the signal of telecommunication and drives distributor circuit 12 by the present invention, and the signal of telecommunication drives distributor circuit 12 that the PRBS code modulation signal free of losses under the control of control circuit 6 received is extended to the PRBS code modulation signal output of M road.Wherein, according to design needs, for QSFP multichannel light module testing, M generally can be decided to be 5, and for 100GCFP multichannel light module, M generally can be decided to be 12, but is not limited thereto.
When exporting PRBS code modulation signal for electrical signal output interface 82, the signal of telecommunication drives the multiple signals of distributor circuit 12 output to export modulation signal extremely optical transceiver module 100 to be measured either directly through electrical signal output interface 82.
When PRBS code modulation signal is exported for optical signal output interface 92, optical transceiver module circuit 3 receives the signal of telecommunication and drives the modulation signal of distributor circuit 12, after the PRBS code modulation signal received is modulated into optical signal by optical transceiver module circuit 3, being detected by Output optical power and attenuation control circuit 42 exports and drives distributor circuit 52 to optical signal, optical signal drives distributor circuit 52 that the modulation optical signal received is extended to M road modulation optical signal and exports modulation optical signal to treating light-metering transmitting-receiving receiver module 100 by optical signal output interface 92.Output optical power detection and attenuation control circuit 42 are under the control of control circuit 6, it is possible to control optical signal output interface 92 and export the size of optical signal.
The present invention supports the bit error rate and sensitivity test under multichannel light module electricity input-electricity output, electricity input-light output, light input-electricity output, light input-light output isotype.
It is illustrated in figure 3 the electrical block diagram of first embodiment of the invention.In the present embodiment, it may be achieved optical module electricity input-electricity output mode under the bit error rate and sensitivity test.The input signal of optical transceiver module 100 to be measured is provided by the electrical signal output interface 82 of the present invention.
Error detection circuit 2 produces PRBS code modulation signal, drives through the signal of telecommunication and exports to electrical signal output interface 82 after distributor circuit 12.Multichannel light signal after modulation is input to optical signal input interface 91 by light output end 104 by light-metering transceiver module 100, optical channel selection circuit 51 receives the optical signal of optical transceiver module 100 to be measured output by optical signal input interface 91, optical channel selection circuit 51 is under the control of control circuit 6, the optical signal selecting passage to be measured exports to Output optical power detection and attenuation control circuit 42, Output optical power detects and optical signal is adjusted by attenuation control circuit 42 and exports to optical signal driving distributor circuit 52 by the optical signal after adjusting, optical signal drives distributor circuit 52 by optical signal output interface 92 output to optical transceiver module 100 to be measured, for the optical module bit error rate and sensitivity test.The signal of telecommunication demodulated is exported to signal of telecommunication input interface 81 after receiving the optical signal of optical signal output interface 92 by optical transceiver module 100 to be measured, electric channel selection circuit 11 receives the signal of signal of telecommunication input interface 81, and export to Error detection circuit 2, Error detection circuit 2 adds up the error code under this condition, and is added up the bit error rate of this passage and the sensitivity of this passage of analytical calculation by control circuit 6.When testing the bit error rate under this input power part, need not additionally plug optical fiber, only need to by controlling Output optical power detection and attenuation control circuit 42, different input optical powers can be obtained for the measuring and calculation bit error rate and sensitivity, different optical channels can be switched by control optical channel selection circuit 51 simultaneously and test the bit error rate and the sensitivity of optical module difference passage.
It is illustrated in figure 4 the electrical block diagram of second embodiment of the invention.In the present embodiment, it may be achieved the bit error rate under optical module electricity input-patterned optical output and sensitivity test.The input signal of optical transceiver module 100 to be measured is provided by the optical signal output interface 92 of the present invention.
PRBS code modulation signal is produced by Error detection circuit 2, driving through the signal of telecommunication exports to optical transceiver module circuit 3 after distributor circuit 12, the modulation optical signal of optical transceiver module circuit 3 output is under the adjustment of Output optical power detection and attenuation control circuit 42, distributor circuit 52 and optical signal output interface 92 is driven to export the modulation optical signal optical transceiver module 100 to be measured being sized by optical signal, for the optical module bit error rate and sensitivity test.The signal of telecommunication demodulated is exported to signal of telecommunication input interface 81 after receiving the optical signal of optical signal output interface 92 by optical transceiver module 100 to be measured, electric channel selection circuit 11 receives the signal of signal of telecommunication input interface 81, and selected channel signal to be measured exports to Error detection circuit 2 under the control of control circuit 6, Error detection circuit 2 adds up the error code under this condition, and is added up the bit error rate of this passage and the sensitivity of this passage of analytical calculation by control circuit 6.Different electric channels can be switched by electric channel selection circuit 11 simultaneously and test the bit error rate and the sensitivity of optical module difference passage to be measured.
It is illustrated in figure 5 the electrical block diagram of third embodiment of the invention.In the present embodiment, it may be achieved optical module light input-electricity output mode under the bit error rate and sensitivity test.The input signal of optical transceiver module 100 to be measured is provided by the electrical signal output interface 82 of the present invention.
PRBS code modulation signal is produced by Error detection circuit 2, drives through the signal of telecommunication and exports to electrical signal output interface 82 after distributor circuit 12.Multichannel light signal after modulation is input to optical signal input interface 91 by optical transceiver module 100 to be measured, optical channel selection circuit 51 receives optical signal by optical signal input interface 91, and under the control of control circuit 6, passage optical signal to be measured is selected to export to input optical power detection and attenuation control circuit 41, input optical power detection and attenuation control circuit 41 adjust the luminous power of output optical transceiver module circuit 3 to setting value, the signal of telecommunication demodulated is exported to Error detection circuit 2 by optical transceiver module circuit 3 by electric channel selection circuit 11 under the control of control circuit 6, Error detection circuit 2 adds up the error code under this condition, and the bit error rate of this passage and the sensitivity of this passage of analytical calculation is added up by control circuit 6.Different light input channels can be switched by optical channel selection circuit 51 simultaneously and test the bit error rate and the sensitivity of optical module difference passage to be measured.
It is illustrated in figure 6 the electrical block diagram of fourth embodiment of the invention.In the present embodiment, it may be achieved the bit error rate under optical module light input-patterned optical output and sensitivity test.Need to pass through the demodulation output signal of telecommunication of optical transceiver module 100 to be measured the connection of electricity outfan 102 and electrical input 101, test as its input signal.
nullPRBS code modulation signal is produced by Error detection circuit 2，Drive through the signal of telecommunication and export to optical transceiver module circuit 3 after distributor circuit 12，The modulation optical signal of optical transceiver module circuit 3 output is under the adjustment of Output optical power detection and attenuation control circuit 42，Distributor circuit 52 and optical signal output interface 92 is driven to export the modulation optical signal being sized by optical signal，Input as optical signal to optical transceiver module 100 to be measured，After the optical signal demodulation received is become the signal of telecommunication by optical transceiver module 100 to be measured，This signal of telecommunication is input to as modulation signal the electrical input 101 of self again，After being modulated into optical signal, optical signal input interface 91 is arrived in output，Optical channel selection circuit 51 receives the optical signal of optical signal input interface 91，And under the control of control circuit 6，Passage optical signal to be measured is selected to export to input optical power detection and attenuation control circuit 41，Input optical power detection and attenuation control circuit 41 adjust output to the luminous power of optical transceiver module circuit 3 to setting value，The signal of telecommunication demodulated is exported to Error detection circuit 2 by optical transceiver module circuit 3 by electric channel selection circuit 11 under the control of control circuit 6，Error detection circuit 2 adds up the error code under this condition，And the bit error rate of this passage and the sensitivity of this passage of analytical calculation is added up by control circuit 6.Different light input channels can be switched by optical channel selection circuit 51 simultaneously and test the bit error rate and the sensitivity of optical module difference passage to be measured.
Multichannel light module can be carried out the bit error rate and sensitivity test by the present invention easily and effectively, test process regulates each channel optical power and need not plug optical fiber measurement confirmation input optical power back and forth, disposable can complete the test of each channel bit error rate of optical module, sensitivity index, simplify operating process, it is simple to large-scale production testing and control.
Present invention can be suitably applied to the performance test such as various single channel or the communication bit error rates of multichannel light module, sensitivity, it is possible to be used for providing multi channel signals to drive and receiving multi channel signals output by light mouth, test for multichannel light module electric eye figure.It is equally applicable to the test of the multi-channel radio frequency communication module beyond optical module, device simultaneously, applied widely.
The above, be only presently preferred embodiments of the present invention, is not intended to limit protection scope of the present invention.
Claims (8)
1. a test device for optical module communication bit error rates and sensitivity, is connected with optical transceiver module to be measured, it is characterised in that comprising:
The signal of telecommunication drives distribution and selection circuit, a passage is divided into plurality of passages, and can export the signal of telecommunication in selector channel, and this signal of telecommunication drives distribution and selection circuit to be connected with this optical transceiver module to be measured；
Error detection circuit, produces and detects the error code signal of telecommunication, and this Error detection circuit drives distribution and selection circuit to be connected with this signal of telecommunication；
Optical transceiver module circuit, for the conversion between optical signal and the signal of telecommunication, this optical transceiver module circuit drives distribution and selection circuit to be connected with this signal of telecommunication；
Luminous power detection and attenuation control circuit, for the detection of luminous power and optical signal is decayed, the detection of this luminous power and attenuation control circuit are connected with this optical transceiver module circuit；
Optical signal drives distribution and selection circuit, and a passage is divided into plurality of passages, and can selector channel output optical signal, this optical signal drives distribution and selection circuit to be connected with the detection of this luminous power and attenuation control circuit and optical transceiver module to be measured respectively；
Control circuit, connecting this signal of telecommunication respectively drives distribution and selection circuit, optical signal to drive distribution and selection circuit, luminous power detection and attenuation control circuit and Error detection circuit, and this control circuit controls the signal of telecommunication respectively and drives distribution and the selection circuit output passage of the signal of telecommunication, optical signal to drive the attenuation of optical signal in distribution and the selection circuit output passage of optical signal, luminous power detection and attenuation control circuit and the Error detection electric circuit inspection bit error rate and sensitivity.
2. the test device of optical module communication bit error rates according to claim 1 and sensitivity, it is characterised in that the described signal of telecommunication drives distribution and selection circuit to include:
Electric channel selection circuit, this electric channel selection circuit connects the electric outfan of this optical transceiver module to be measured, optical transceiver module circuit and Error detection circuit respectively；This electric channel selection circuit receives the signal of telecommunication of this optical transceiver module to be measured output or the signal of telecommunication of this optical transceiver module circuit output, and under the control of described control circuit the selector channel output signal of telecommunication to this Error Detector testing circuit；
The signal of telecommunication drives distributor circuit, and this signal of telecommunication drives distributor circuit to connect the electrical input of this optical transceiver module to be measured, Error detection circuit and optical transceiver module circuit respectively；This signal of telecommunication drives distributor circuit to receive the error code signal of telecommunication of Error detection circuit output, and exports to this optical transceiver module to be measured or optical transceiver module circuit.
3. the test device of optical module communication bit error rates according to claim 2 and sensitivity, it is characterized in that, the test device of described optical module communication bit error rates and sensitivity also includes signal of telecommunication input interface and electrical signal output interface, being connected this signal of telecommunication input interface between this electric channel selection circuit and electric outfan of optical transceiver module to be measured, this signal of telecommunication drives and is connected this electrical signal output interface between distributor circuit and the electrical input of optical transceiver module to be measured.
4. the test device of optical module communication bit error rates according to claim 2 and sensitivity, it is characterised in that the detection of described luminous power and attenuation control circuit include:
Input optical power detection and attenuation control circuit, the detection of this input optical power and attenuation control circuit connect this optical transceiver module circuit and control circuit respectively；Under the control of this control circuit, the detection of this input optical power and attenuation control circuit are to attenuated optical signal, and input the optical signal after decay to this optical transceiver module circuit；
Output optical power detection and attenuation control circuit, the detection of this Output optical power and attenuation control circuit connect this optical transceiver module circuit and control circuit respectively；Under the control of this control circuit, this input optical power detection and attenuation control circuit by receive by the attenuated optical signal of optical transceiver module circuit transmission.
5. the test device of optical module communication bit error rates according to claim 4 and sensitivity, it is characterised in that described optical signal drives distribution and selection circuit to include:
Optical channel selection circuit, this optical channel selection circuit connects the light output end of this control circuit, input optical power detection and attenuation control circuit, Output optical power detection and attenuation control circuit and optical transceiver module to be measured respectively；This optical channel selection circuit selector channel receives the optical signal of this optical transceiver module to be measured input, and under the control of this control circuit, selector channel outputs optical signals to the detection of this input optical power and attenuation control circuit or Output optical power detection and attenuation control circuit；
Optical signal drives distributor circuit, and this optical signal drives distributor circuit to connect the light input end of the detection of this Output optical power and attenuation control circuit and optical transceiver module to be measured respectively；This optical signal driving distributor circuit receives the optical signal after the decay of the detection of this Output optical power and attenuation control circuit, and exports to this optical transceiver module to be measured.
6. the test device of optical module communication bit error rates according to claim 5 and sensitivity, it is characterized in that, the test device of described optical module communication bit error rates and sensitivity also includes optical signal input interface and optical signal output interface, this optical channel selection circuit is connected this optical signal input interface with the light output end of optical transceiver module to be measured, and this optical signal drives distributor circuit to be connected this optical signal output interface with the light input end of optical transceiver module to be measured.
7. the test device of optical module communication bit error rates according to claim 1 and sensitivity, it is characterised in that the test device of described optical module communication bit error rates and sensitivity also includes communication interface, this control circuit receives control instruction by described communication interface.
8. the test device of optical module communication bit error rates according to any one of claim 1 ~ 7 and sensitivity, it is characterised in that described control circuit is singlechip controller.
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