Development And Research Of The Cloud System Of Testing Instrument Based On SFP

At present,the automatic test of optical module is widely used in the optical module manufacturing enterprises.The production and manufacturing of optical module will pass the test.It is an important process to check whether the performance indexes of optical modules meet the requirements of customers.The traditional optical module automatic test uses a test bench with a complete set of test instruments.However,the instruments needed in the process of optical module test,such as oscilloscope,are not only expensive,but also can only be used for more than ten seconds in the test process(generally,the test time of the optical module of the SFP(Small Form-factor Pluggable)is about 50s).How to improve the utilization rate of test instrument is the focus of this paper.Aiming at the above problems,this paper is based on the traditional automatic testing theory of optical modules.This paper proposes a new testing scheme of the cloud system of the testing instrument for the optical module of the SFP.The system can effectively improve the utilization rate of the test instrument and save the cost of equipment purchase in the optical module manufacturing enterprise.At present,the system has been applied in our company's optical module test production process.The main content of the thesis includes:(1)The main test indexes of the SFP optical film block test are described,including the emission optical power,eye chart,sensitivity,bit error rate,DDM data,etc.At the same time,this paper introduces a set of overall scheme of the cloud system of testing instruments based on the SFP.The implementation principle is: the tester queries the available instruments by visiting the instrument cloud server,and then obtains the communication interface of the instrument by continuing to visit the instrument server when the instrument is not occupied.(2)Using LabVIEW design language,design the driver program of oscilloscope,attenuator,error code analyzer,and realize the PC remote program-controlled instruments.(3)Using the open source event driven library libevent as the system service framework,using C + + programming language to realize the development of the instrument cloud server,instrument server,customer management and other client software.(4)Set up an experimental environment to verify the function and innovation of the instrument cloud system.