随机数是信息安全的重要基石，关系到国家安全、经济稳定、商业机密、个人隐私等众多方面。采用复杂算法可产生快速伪随机数，但无法保证通信绝对安全；当前物理随机数产生技术实时速率已达Gbps量级，但仍与当前40Gbps通信传输速率之间存在着显著差距。.本项目旨在探明激光相位混沌呈现类噪声平坦频谱特性的物理机制和相关调控技术，发展出一种兼具高带宽（3-dB带宽40GHz以上）和无特征振荡信息（延迟反馈振荡、弛豫振荡）的超宽带混沌信号产生新方法；进而，结合光采样和平衡探测量化技术，探索出一套适用于超高速物理随机数的在线提取方案，实现单信道速率40Gbps以上的物理随机数实时产生。.本项目的实现，将解决当前物理随机数实时产生面临的物理熵源有效带宽不足问题，可满足当前大容量保密通信的安全需求，促进信息安全及光信号处理等相关学科的发展。

Random numbers are critical for the information security, which is related to national security, economic stability, trade secrets, personal privacy, and many other aspects. Utilizing complex algorithms can generate fast pseudo-random numbers, but they can not ensure completely secure communications；The available physical random number generators have reached a real-time rate at the level of Gbps, but there is still a significant gap from the current 40 Gbps communication transmission rate..This project aims to explore the physical mechanism and related control technology why the laser phase chaos exhibits a noise-like flat spectrum characteristics and develop a new method for generating ultra-wide bandwidth chaotic signal with a high 3-dB bandwidth (more than 40 GHz) and no any oscillation information such as delayed feedback oscillation and relaxation oscillation. Further, an online photonic scheme for ultra-fast physical random number extraction will be explored by combining an optical sampling with a balanced-detection based quantization so that physical random numbers can be produced with a single channel rate above 40 Gbps..The achievement of this project will solve the insufficient bandwidth problem of the entropy source confronted by the current real-time physical random number generation, can meet the security requirements of the current large capacity secure communication, and promote the development of the information security and optical signal processing.