中圖分類號： TN95
文獻標(biāo)識碼： A
DOI：10.16157/j.issn.0258-7998.201212
中文引用格式： 朱敏，吳楠，楊春玲，等. 亞皮秒級激光回波半實物仿真系統(tǒng)關(guān)鍵技術(shù)研究[J].電子技術(shù)應(yīng)用，2021，47(6)：119-125，130.
英文引用格式： Zhu Min，Wu Nan，Yang Chunling，et al. Research on key technologies of sub-picosecond laser echo semi-physical simulation system[J]. Application of Electronic Technique，2021，47(6)：119-125，130.

Research on key technologies of sub-picosecond laser echo semi-physical simulation system

Abstract： The laser echo simulation system can generate high-frequency and high-precision analog echo signals according to the simulated target. This paper presents a design scheme of a laser echo simulation system. The system uses FPGA to generate a delay signal, which can achieve a sub-picosecond delay accuracy for the echo signal. This paper optimizes the optical fiber communication protocol and uses FPGA to implement the echo signal transmission system, which has got rid of the dependence on the reflective memory card in the existing scheme, and has increased the data refresh frequency. The simulation results show that the data transmission speed of the simulation system designed in this paper reaches 1.6 Gb/s, the echo accuracy reaches 125 ps, and the distance resolution reaches 0.05 m. It laid the foundation for the development of high-precision laser guidance semi-physical simulation system based on laser array.

Key words : laser imaging guidance；FPGA；optical fiber communication；high accuracy delay；PLL