关键词: 掺铒光纤激光器, 超混沌, 伪随机序列, 图像加密

Abstract: A new pseudo-random sequence based on hyper-chaos of Er-doped fiber laser is proposed，and then its performance is analyzed.The experimental results demonstrate that the sequence is sensitive to the secret key，and has better frequency test feature，sequence test feature and correlation.So the pseudo-random sequence has high security level.At the same time，the sequence generation method is simple and easy to implement.It is a class of promising pseudo-random sequence in practical applications.Finally，the hyper-chaotic pseudo-random sequence is applied to image encryption and obtains good results.

Key words: Er-doped fiber laser, hyper-chaos, pseudo-random sequence, image encryption