To solve the issues of the long development cycle and poor flexibility of industrial Passive Optical Metwork（PON）

we proposed a scheme composed of Field Programmable Gate Array（FPGA） with integrated high-speed serial transceivers instead of external physical layer chip. The hierarchical design model and data frame structure are improved and the character length of burst synchronization can be reconfigured online according to the burst synchronization performance of the optical line terminal transceiver. The results of board level verification show that the system can complete the data frame reception and burst mode transmission at the rate of 3.125 Gbit/s

with advantages of high compatibility and low complexity.