相关实验视频
Updated: Feb 21, 2026
07:45
Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
11.4K
概括
本研究介绍了一种新的波长选择性交换机 (WSS) 模型,以优化光谱成型,增强频道带宽. 该方法平衡带宽收益与插入损失和波惩罚,以改善通信系统.
科学领域:
- 光学通信系统 光学通信系统
- 光子学和光电子学.
- 在光学网络中的信号处理.
背景情况:
- 级联波长选择开关 (WSS) 会导致带宽缩小,限制高 baud率通信性能.
- 通过WSS减弱控制进行光谱造型可以增强频道带宽,但由于光学重叠和缺乏物理模型,在最佳配置确定方面面临挑战.
- 在WSS光谱塑造中,带宽增强与插入损失 (IL) 和波纹等处罚之间的权衡尚未得到充分理解.
研究的目的:
- 开发一种新的WSS过模型,以优化光谱造型.
- 为了确定在IL和波纹约束下增强通道带宽的最佳衰减配置.
- 系统地调查和量化带宽增强,IL和波纹罚款之间的权衡.
主要方法:
- 开发了一个新的WSS过模型.
- 该模型被集成到梯度下降算法中,用于代优化衰减配置文件.
- 进行了模拟和实验,以量化带宽增强,IL和波纹惩罚之间的关系.
主要成果:
- 确定了一种实用的策略,交易0.5dBIL和0.3dB波纹以提高带宽.
- 实验验证显示,在定义的约束条件下,平均带宽增强1.9GHz (0.5dB) 和0.76GHz (3dB).
- 在模拟和实验结果之间观察到密切一致.
结论:
- 拟议的WSS过模型和优化方法有效地提高了频道带宽.
- 该研究量化了可实现的带宽增强与可接受的IL和波纹罚款相比.
- 这些发现为设计使用WSS光谱成型的实用和高性能光通信系统提供了宝贵的指导.
相关概念视频
01:23Lossless Lines
586
In electrical engineering, a lossless transmission line is characterized by a purely imaginary propagation constant and a resistive characteristic impedance. The ABCD parameters, which describe the relationship between the input and output voltages and currents, indicate an equivalent π circuit with an imaginary series impedance and a shunt admittance. This results in a transmission line that, when the product of the phase constant (beta) and the length of the line is less than pi, exhibits...
586
01:22Lossy Lines and Overvoltages
371
Transmission-line series resistance and shunt conductance cause three primary effects: attenuation, distortion, and power losses.
Attenuation
When constant series resistance and shunt conductance are present, voltage and current equations are modified. The propagation constant indicates that voltage and current waves consist of both forward and backward traveling components. These waves attenuate as they propagate, with the attenuation factor related to the resistance and conductance. In a...
Attenuation
When constant series resistance and shunt conductance are present, voltage and current equations are modified. The propagation constant indicates that voltage and current waves consist of both forward and backward traveling components. These waves attenuate as they propagate, with the attenuation factor related to the resistance and conductance. In a...
371
01:21Boundary Conditions: Lossless Lines
441
Consider a single-phase, two-wire, lossless transmission line terminated by an impedance at the receiving end and a source with Thevenin voltage and impedance at the sending end. The line, with length, has a surge impedance and wave velocity determined by the line's inductance and capacitance.
At the receiving end, the boundary condition states that the voltage equals the product of the receiving-end impedance and current. This relationship is expressed as a function of the incident and...
At the receiving end, the boundary condition states that the voltage equals the product of the receiving-end impedance and current. This relationship is expressed as a function of the incident and...
441
01:23Transmission Line Design Considerations
656
Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
656
01:21Time and frequency -Domain Interpretation of Phase-lag Control
424
Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any...
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any...
424
01:27Traveling Waves: Lossless Lines
491
The provided content explores the behavior of traveling waves on single-phase lossless transmission lines. It begins with a single-phase two-wire lossless transmission line of length Δx, characterized by a loop inductance LH/m and a line-to-line capacitance C F/m. These parameters result in a series inductance LΔx and a shunt capacitance CΔx.
491