相关实验视频
Updated: Jun 24, 2025

06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
9.0K
概括
一个新的芯片级混沌激光系统使用光电子反来实现紧,安全的通信. 这种集成光子电路产生复杂的信号,并通过隐藏时间延迟信号来增强安全性.
科学领域:
- 光子学和激光技术的发展
- 集成光学 集成光学 集成光学
- 混沌理论 混沌理论
背景情况:
- 传统的混乱激光系统通常需要大型的外部组件来实现反延迟.
- 实现紧和集成的混乱激光源对于先进的应用至关重要.
- 光电子反机制为小型化和增强功能提供了潜力.
研究的目的:
- 提出和分析一个芯片规模的混乱激光系统与集成的光电子延迟反.
- 为了证明只使用芯片上部件的紧混沌信号生成的可行性.
- 为了评估安全通信应用程序的系统性能.
主要方法:
- 一个芯片规模的激光系统的数值模拟,结合了光电子延迟反.
- 使用内部设备和波导来延迟反,消除外部组件.
- 对系统动态的分析,包括周期性,准周期性和混乱状态.
- 调查时间延迟签名 (TDS) 隐藏和通信安全.
主要成果:
- 芯片尺度系统表现出丰富的动态行为,包括类似高斯白噪声的混乱状态.
- 实现了皮秒级延迟时间,使复杂的信号生成成为可能.
- 通过较短的延迟时间观察到增强的TDS隐藏,尽管信号复杂性降低.
- 证明了1Gbps安全通信的可行性,授权用户的比特错误率低 (<10^-6),窃听者的比特错误率高 (>10^-2).
- 预先的实验验证实了理论发现.
结论:
- 使用带有光电子反的混合集成光学混乱电路可以实现稳定和灵活的集成混乱源.
- 拟议的芯片规模系统为安全通信提供了一个紧而高效的解决方案.
- 具有光电子反的光子集成电路代表了未来安全通信技术的有希望的平台.
相关概念视频
Effects of feedback
548
Feedback in control systems plays a critical role in shaping various operational parameters, extending beyond simple error reduction to influence stability, bandwidth, gain, impedance, and sensitivity. Understanding these effects requires examining a basic feedback system characterized by defined input, output, error, and feedback signals.
Feedback significantly modifies the gain of a control system. The gain of a system without feedback is altered by a factor of one plus GH, where G represents...
Feedback significantly modifies the gain of a control system. The gain of a system without feedback is altered by a factor of one plus GH, where G represents...
548
Feedback control systems
304
Feedback control systems are categorized in various ways based on their design, analysis, and signal types.
Linear feedback systems are theoretical models that simplify analysis and design. These systems operate under the principle that their output is directly proportional to their input within certain ranges. For instance, an amplifier in a control system behaves linearly as long as the input signal remains within a specific range. However, most physical systems exhibit inherent nonlinearity...
Linear feedback systems are theoretical models that simplify analysis and design. These systems operate under the principle that their output is directly proportional to their input within certain ranges. For instance, an amplifier in a control system behaves linearly as long as the input signal remains within a specific range. However, most physical systems exhibit inherent nonlinearity...
304
Cascaded Op Amps
626
Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
626
Integrator and Differentiator
822
Op-amp circuits have significant applications in various fields, including automotive engineering. One such application is cruise control systems in cars, where op-amp circuits are integral for maintaining a constant speed. In these systems, op-amps function as both integrators and differentiators.
An integrator within an op-amp circuit produces an output directly proportional to the integral of the input signal. This is achieved by replacing the feedback resistor in a typical inverting...
An integrator within an op-amp circuit produces an output directly proportional to the integral of the input signal. This is achieved by replacing the feedback resistor in a typical inverting...
822
Positive and Negative Feedback Loops
19.0K
Animal organs and organ systems constantly adjust to internal and external changes through a process called homeostasis ("steady state"). Examples of these changes include regulation of the level of glucose or calcium in the blood or internal responses to external temperatures. Homeostasis requires maintaining an internal dynamic equilibrium:
19.0K
Inverting and Non-inverting OpAmps
728
In an inverting amplifier, the input voltage is connected through a resistor to the inverting terminal. Meanwhile, the non-inverting terminal is grounded and a feedback resistor is established between the inverting and output terminal, as depicted in Figure 1.
728

