Stochastic resonance in optical bistable systems

光学双稳态系统中的随机共振

• 批准号: 09440154
• 负责人: KOHMOTO Toshiro
• 金额: $ 7.17万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09440154/
• 关键词: stochastic resonance; optical bistability; noise light; 雑音光; スペクトル解析

Stochastic resonance(SR) is a cooperative phenomenon that the output signal-to-noise ratio(SNR) is enhanced by adding random noise to the input coherent signal. In spite of its strange appearance, it occurs in various systems. In view of the ability of controlling SNR by adding noise, it is expected to be applied to signal processing, especially to optical signal processing.(1)SR experiments in hybrid optical bistable systems were performed for a sinusoidal input signal. The experimental results show that, with smaller noise correlation time, the peak value of the SNR is larger, the width of the resonance is narrower, and the noise intensity which gives the peak SNR is smaller.(2)Numerical simulations were performed using a simple model (a Langevin equations for an overdamped system with a bistable potential). The simulation results reproduced well the experimental results.(3)SR for a binary input signal was studied by numerical simulations. It was found that the output signal has a gain of information, and that the noise with a small correlation time is favorable for SR and for the gain.(4)The behavior of SR for image data was simulated. The simulation results show that this system can improve the visibility of images and can be a powerful tool for signal processing.

随机共振（SR）是一种通过在输入相干信号中加入随机噪声来提高输出信噪比的协同现象。尽管它的外观很奇怪，但它发生在各种系统中。鉴于其通过加入噪声来控制信噪比的能力，有望应用于信号处理，特别是光信号处理。(1)SR对于正弦输入信号执行了混合光调制系统中的实验。实验结果表明，噪声相关时间越短，信噪比峰值越大，共振宽度越窄，产生峰值信噪比的噪声强度越小。（2）采用一个简单的模型（一个带有超势的过阻尼系统的Langevin方程）进行了数值模拟。仿真结果与实验结果吻合较好。(3)SR通过数值模拟研究了二进制输入信号的情况。结果发现，输出信号具有信息增益，并且具有小相关时间的噪声有利于SR和增益。（4）模拟了图像数据的随机共振行为。仿真结果表明，该系统可以提高图像的可视性，可以成为信号处理的有力工具。

项目成果

M. Misono: "Correlation spectroscopy with noise light excitation"Phys. Lett. A. 240. 29-36 (1998)

M. Misono：“噪声光激发的相关光谱”Phys。

M. Misono: "Noise-enhanced transmission of information in a bistable system"Phys. Rev. E. 58. 5602-5607 (1998)

M. Misono：“双稳态系统中的噪声增强信息传输”Phys。

T. Kohmoto: "Correlation spectroscopy with excitation by noise light : Excited-state signals in Rb atoms"Phys. Lett. A. 258. 291-296 (1999)

T. Kohmoto：“噪声光激发的相关光谱：Rb 原子中的激发态信号”Phys。

M.Misono: "Noise-color dependence of stochastic resonance signals in a hybrid optical bistable system"J. Phys. Soc. Jpn. 67. 2162-2165 (1998)

M.Misono：“混合光学双稳态系统中随机共振信号的噪声颜色依赖性”J。

M.Misono: "Noise-Color Dependence of Stochastic Resonance Signals in a Hybrid Optical Bistable System" J.Phys.Soc.Jpn.67・7. 2162-2165 (1998)

M.Misono：“混合光学双稳态系统中随机共振信号的噪声-颜色依赖性”J.Phys.Soc.Jpn.67・7（1998）。