Apparatus and method for analog optical signal code error

Abstract

A device simulating light signal error code and method, comprises optoelectronic switching module used in receiving light signal and converting it into binary digital signal, the clock picking up module used in picking up the clock signal having same rate with the digital signal, the multi-path error code generating module used in generating the digital signal needed by testing, optoelectronic switching module used in converting the binary digital signal into optical signal and outputting it. This invention not only implements the stimulation for optical signal error code to test the performance of communication system, but also sets the simulative error code rates precisely, has large simulative range of error code rate, and the simulative error code rate will not be changed by environmental influence.

Description

technical field [0001] The invention relates to the field of communication, in particular to a device and method for simulating bit errors of optical signals to test the performance of a communication system. Background technique [0002] Many current communication systems often use optical signals for communication. In such systems, it is often necessary to verify the impact of bit errors introduced by optical signals during transmission on the entire system. When optical signals are being transmitted, bit errors may occur due to factors such as dispersion, optical power attenuation, transmission power fluctuations, receiving sensitivity fluctuations, asynchronous optical signal transceiver clocks, interference and damage to optical transmission media, and in non-ideal environments Bit errors are inevitable. Therefore, when designing such a communication system, it is necessary to verify the performance of the system under different optical transmission bit error rates and...

AI Technical Summary

Problems solved by technology

[0005] 1. Due to the differences between different optical transceiver modules, there is no clear correspondence between the bit error rate of optical transmission, the amount of optical attenuation, and the length of the optical transmission medium. Unable to simulate the specified bit error rate;

[0006] 2. Since the transmission power and receiving sensitivity of the optical transceiver module will fluctuate with time, ambient temperature, power supply voltage and other factors, the bit error rate simulated by adding the same attenuation to the same optical module is not a definite value;

[0007] 3. Since the attenuation of the existing optical attenuator is difficult to fine-tune, the length of the optical transmission medium is even more difficult to adjust, and the bit error rate cannot be fine-tuned when simulating bit errors;

[0008] 4. Control the on-off of the optical transmission medium by manually plugging and unplugging the optical transmission medium or the optical switch. Due to the slow response speed, it can only simulate a large number of burst errors, and the bit error rate is also uncontrollable.

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