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相关概念视频

The Maximum Power Transfer Theorem01:20

The Maximum Power Transfer Theorem

1.1K
Consider a linear AC Thevenin equivalent circuit connected to a load impedance.
The load connected draws the current, and the circuit delivers the power to the load. The alternating current flowing through the load is determined using the rectangular form of voltages, currents, network impedance, and load impedance. The average power delivered to the load is obtained from the product of the square of current and load resistance.
1.1K
Maximum Power Transfer01:16

Maximum Power Transfer

813
Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
813
Superconductor01:24

Superconductor

1.7K
A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
1.7K
Design Example01:23

Design Example

525
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
525
Types Of Superconductors01:28

Types Of Superconductors

1.6K
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
1.6K
Transmission Line Design Considerations01:23

Transmission Line Design Considerations

588
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...
588

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相关实验视频

Updated: Jan 13, 2026

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
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通过拓半超级模式实现超强的电信.

Rui Zhou1,2, Xintong Shi1, Hai Lin1

  • 1College of Physical Science and Technology, Central China Normal University, Wuhan, Hubei, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|January 10, 2026
PubMed
概括
此摘要是机器生成的。

拓光子学使强大的集成波导装置成为可能. 一个新的山谷隙波导实现了超紧,无集成的设备,具有反向散射免疫力.

关键词:
无集成的无集成.超强大的电信设备.在拓上,半超模式是半超模式.超紧型的超紧型谷山-山脊混合波导是波导.

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科学领域:

  • 光子学是指光子学的使用方法.
  • 凝聚物质物理学 凝聚物质物理学
  • 集成光学 集成光学 集成光学

背景情况:

  • 拓光子学提供了强大的集成波导装置,由于反向散射免疫力.
  • 整合的挑战包括模式对称性不匹配和大设备尺寸.

研究的目的:

  • 为了克服拓光子学中的整合挑战.
  • 开发超紧且无集成的拓波导装置.

主要方法:

  • 介绍了一种基于拓半超模式工程的新型山谷隙波导.
  • 混合式的山脊波导模式和山谷曲状态创建一个奇异对称的超级模式.
  • 实现了完美的电导体边界,以减少尺寸并消除辐射损失.

主要成果:

  • 通过拓半超模式工程实现了强大的传播和超紧的操作.
  • 通过直接横向电气模式匹配,与标准波导进行无集成.
  • 实验结果显示,反射损失低于-15dB,信号在尖曲线上传播强大.

结论:

  • 为集成波导器件拓半超模式的实用应用开创.
  • 建立了一种新的波导类别,将反射免疫与深度亚波长紧性相结合.
  • 在模式对称性不匹配和用于拓光子集成的设备尺寸方面克服了关键挑战.