1 上海大学光纤研究所，上海 201800
2 上海大学特种光纤与光接入网省部共建重点实验室，上海 200444
研究了将光电振荡器产生的混沌信号作为物理随机数熵源时的采样率上限，通过研究不同的采样率对混沌熵源的随机特征的影响，得到满足随机采样条件的最大采样率；信号的随机特征通过自相关函数和功率谱表征，通过游程检验以及正态性检验得到最大采样率。仿真结果表明，对混沌信号进行随机采样时，存在一个采样率上限；在此基础上，通过计算可得到最大随机采样率和最大正态采样率，并分别研究了这两种最大采样率随光电振荡系统反馈强度的变化。
信号处理 非线性光信号处理 光电混沌 物理随机性 采样率 游程检验 正态性检验 激光与光电子学进展
2021, 58(3): 0307001
Author Affiliations
Abstract
State Key Laboratory on Integrated Optoelectronics, Tsinghua National Laboratory for Information, Science and Technology (TNList), Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
A novel all-optical method for ultra-wideband (UWB) monocycle pulses generation based on cross polarization modulation (CPM) effect in highly nonlinear photonic crystal fiber is proposed and demonstrated. Due to the CPM effect between the probe light and the pump pulse, a pair of polarity-reversed Gaussian pulses is produced. After proper differential delay, an UWB monocycle pulse with 84-ps width and the fractional bandwidth of 153% is generated after photodetection.
光纤通信 微波 非线性光信号处理 光子晶体光纤 060.2330 Fiber optics communications 350.4010 Microwaves 070.4340 Nonlinear optical signal processing 060.5295 Photonic crystal fibers Chinese Optics Letters
2009, 7(11): 990
