Design And Implementation Of Verification Platform For Spaceborne High Speed Optical Burst Switching

With the increasing number of satellite launches,inter-satellite communication has higher requirements for communication bandwidth,and laser gradually replaces microwave as a new communication method.Compared with microwave,laser has larger bandwidth,wider frequency spectrum and stronger anti-electromagnetic interference ability.It has become the preferred communication method for next-generation intersatellite information transmission,and the construction of satellite optical switching network has also become an inevitable trend.At present,there are two types of switching networks:electrical switching and optical switching.Optical switching can make full use of the bandwidth of laser links,so optical switch is a research hotspot in optical switching,and optical burst switching is an important technology in optical switching,and it is also the research focus of this paper.From the perspective of satellite optical network,this paper analyzes the necessity of optical switching technology in satellite optical network,and builds a hardware verification platform based on optical burst switching to verify the feasibility of optical burst switching technology in satellite optical network.Therefore,the innovations and main work of this paper are as follows:1)Based on the functional structure of the MG-Y wavelength tunable laser,the hardware and software design of the laser drive circuit is completed,and the stability test is carried out.The test results show that the laser can work stably,with a maximum wavelength shift of 0.3pm and a maximum power shift of 0.052dBm during normal operation.2)In order to ensure that the laser can be more stable during wavelength switching,an improved incremental PID algorithm for fast wavelength locking is proposed in this paper,and its simulation verification is completed.The results show that the algorithm can reach stability faster than the ordinary incremental PID algorithm.3)Based on wavelength tunable lasers,AWGR,FPGA,CPU and other devices,this paper adopts the form of "Chassis and Board" to build a verification platform for on-board high-speed optical burst switching,and completes the performance test of the hardware platform,and finally realizes 20 channels,each 10Gbps optical switch,and the switching time interval is 11.9us.