| In recent years,relying on the strengths of huge capacity,high speed and low power consumption,all-optical communication network has gradually evolved into one of the crucial technologies to meet the needs of social development.As the core of all-optical communication network,optical switching technology can avoid the problem of "electronic bottleneck" in high-speed optical communication network,and has always attracted much attention and extensive research.Among them,large-scale optical switching chip and its control technology are the research hotspots in recent years.With the increase of the switching scale of the optical switching chip,the requirements for the chip drive control circuit are getting higher and higher,and the realization is more difficult.The thesis focuses on the drive control circuit of large-scale optical switching chip,and completes the performance test of the optical switching chip system.The main innovations include:(1)In response to the demand for large-scale switching chip drive circuits,an optical switch chip drive circuit based on pulse width modulation(PWM)has been developed,which has the advantages of low hardware cost and meets the needs of independent drive control;(2)In order to meet the needs of various structures To meet the drive control requirements of optical switching chips,the hybrid drive of digital-analog(DA)and Turbo-PWM two types of control circuits is realized through the compatible carrier board design scheme;(3)The designed control circuit and software are scalable and can meet the needs of Application requirements of optical switch chip driver circuits of different scales.The main contents of the thesis are as follows:1.A chip drive control scheme suitable for different optical switching scales and structures is proposed.It consists of a carrier board and several driver boards.Each driver board is flexibly combined on the carrier board in parallel between boards.The board can carry 4 driver boards,and is compatible with two types of control circuits,DA and TurboPWM,for mixed driving.Circuit expansion is realized by means of multiple carrier boards and multiple drive boards to meet the drive control requirements of chips of different switching scales.2.The chip driver board based on PWM technology is designed and developed.With the cooperation of the control algorithm,each driver board can independently output 93high-precision driving signals with adjustable pulse width.By optimizing the control signaling of the control software,4 drive boards and a total of 372 parallel outputs are realized.The hardware and software are jointly tested.The experiment shows that the voltage adjustable range of each output is 0?10.313 V,the average adjustment accuracy is 7.174 m V,and the maximum driving capacity is 49.96 m W,which meets the requirements of the scientific research projects undertaken for the chip drive circuit indicators.Require.3.Complete the joint debugging of the control circuit and the optical switch chip module,and test the drive voltage and optical switch response required by the optical switch unit in the optical switch chip,and verify the reliability of the Turbo-PWM drive circuit.On this basis,a verification system of 32×32 optical switching chip module was built,and the transmission experiment of 400Gb/s and dual polarization 16 QAM for each channel was carried out.The experimental results show that the photoelectric switching response time of the optical switching chip module to be tested is 402.20 ?s,the average sensitivity penalty is about 0.247 d B,and the switching capacity can reach the order of Pb/s. |
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