相关实验视频
Updated: Feb 1, 2026

16:11
Implementation of a Reference Interferometer for Nanodetection
Published on: April 26, 2014
9.8K
概括
本研究介绍了一种用于模式划分多重复合 (MDM) 系统的新型光学交换机. 该设备可以有效切换多种光模式,这对于先进的光通信至关重要.
科学领域:
- 光子学和光学工程 光子学和光学工程
- 集成光学 集成光学 集成光学
- 波导技术技术 波导技术
背景情况:
- 模式分割复杂化 (MDM) 在光网络中提供了增强的数据容量.
- 高效的光学开关对于MDM系统中的路由信号至关重要.
- 平面光波电路为集成光学设备提供了一个平台.
研究的目的:
- 提出和演示一种新的N通道模式分割复杂化 (MDM) 信号切换方案.
- 开发一种使用平面光波电路技术的三模光学开关.
- 评估用于MDM应用的制造光学交换机的性能.
主要方法:
- 使用级联对称的 Ψ 连接点,马赫-泽恩德干扰仪 (MZI) 波导和电极相移器,设计和制造一台三模光学开关.
- 使用热光学调制来进行信号切换.
- 在设备制造中采用CMOS兼容的对处理.
主要成果:
- 制造的开关显示了低插入损失 (IL) 的3.7±0.1dB和高灭绝比 (ER) 的10.3±0.5dB在1550nm的个人模式切换 (E11,E21,E31).
- 实现了 <1.36 ms 的快速响应时间.
- 在E11和E21模式下显示了广泛的操作带宽 (>100 nm),IL<5dB,ER≥8dB.
- 该开关可重新配置,用于同时或单独路由模式.
结论:
- 拟议的MDM光学开关能够高效,低损耗地切换多种模式.
- 该设备的性能特性使其适用于MDM系统中的各种应用.
- 这项技术在未来的高容量光通信系统中具有光学互连的巨大潜力.
相关概念视频
Switching of BJT
860
Switching behavior in Bipolar Junction Transistors (BJTs) is a fundamental aspect utilized in various electronic circuits, particularly for digital logic applications like switches and amplifiers. In a typical switching circuit, a BJT alternates between cut-off and saturation modes, corresponding to the "off" and "on" states, respectively, thus behaving like an ideal switch.
Cut-off Mode ("Off" State): In this state, both the emitter-base and collector-base junctions are...
Cut-off Mode ("Off" State): In this state, both the emitter-base and collector-base junctions are...
860
What is a Mode?
26.0K
The mode is one of the commonly used measures of a central tendency. It is defined as the most frequent value in a data set.
There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times.
A data set with two modes is called bimodal. For example,...
There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times.
A data set with two modes is called bimodal. For example,...
26.0K
Line Loss
541
The different configurations of source-load connections include wye (star) and delta connections. The relationship between line and phase voltages and currents varies depending on the configuration. When the source is supplying power, it is transmitted through the wires to the load, and during this transmission, some power is absorbed by the wires, leading to line loss.
Line loss impacts power delivery efficiency in a balanced three-phase circuit. The symmetry in such a circuit simplifies the...
Line loss impacts power delivery efficiency in a balanced three-phase circuit. The symmetry in such a circuit simplifies the...
541
P-N junction
1.2K
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
1.2K
Ventilatory Modes
1.5K
Mechanical ventilators are life-saving devices that support or replace spontaneous breathing. They deliver breaths to patients through varying methods known as ventilator modes. Understanding these modes is critical for healthcare providers managing patients with respiratory failure.
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...
1.5K
Reducing Line Loss
389
In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss in...
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss in...
389

