相关实验视频
Updated: Jul 16, 2025

11:21
Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
7.5K
概括
研究人员优化了使用非线性渐变形状的亚亚巴特Y连接电源分离器,显著缩短了设备长度而不会增加损耗. 这一进步为集成光子学提供了高效的光功率分割.
科学领域:
- 综合光子学 综合光子学
- 波导器件的波导器件是指导波的.
- 光学信号处理的光学信号处理.
背景情况:
- 阿迪亚巴特式Y结电源分离器提供了出色的性能特性,包括低损耗,宽带宽和极化不敏感性.
- 阿迪亚巴特式功率分割器的一个主要局限性是它们通常长的设备长度,这对紧的集成光子电路来说可能是个挑战.
- 非线性形形状为减少这些设备的物理足迹提供了潜在的解决方案.
研究的目的:
- 开发和演示一种方法,以显著减少亚亚巴特式Y结电源分割器的长度.
- 为了保持或改进这些设备的低损耗和平衡的分裂性能,在长度减少后.
- 在在绝缘体 (SOI) 平台上实验验验证优化的设计.
主要方法:
- 开发一个利用多项式函数的形形状优化算法.
- 在220 nm的SOI平台上制造具有不同最小特征尺寸 (80 nm,120 nm,160 nm) 的电分离器.
- 设备性能的实验性表征,包括插入损失,传输和对横向电 (TE) 和横向磁 (TM) 模式的光谱响应.
主要成果:
- 优化的非线性渐变形状成功地减少了电动功率分割器所需的过渡长度.
- 一个具有120nm最小特征尺寸的设备实现了14μm的紧长度.
- 测量损失在1500-1600nm波长范围内低至0.25dB (TE) 和0.23dB (TM).
- 平均传输值为-3 ± 0.5 dB,在广泛的光谱范围内显示出高度平衡的功率分割.
结论:
- 基于多项式的渐变形状优化算法有效地缩短了亚亚巴特Y结电源分割器,而不会影响光学性能.
- 展示的设备显示出出色的低损耗和平衡的分裂特性,适合各种集成光子应用.
- 这种方法可以在SOI平台上创建更紧和更高效的功率分割器.
相关概念视频
Maximum Power Transfer
285
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...
By substituting the entire circuit with...
285
Transmission Line Design Considerations
164
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...
164
Power Distribution in Three-phase and Single Phase Circuits
340
Power distribution within electrical circuits is a foundational aspect of residential and industrial energy systems. While single-phase power is common in residential settings, three-phase power is the standard for industrial environments with heavy machinery. Each system is different and has advantages, and it's crucial to understand the underlying principles of power distribution and material efficiency.
Single-Phase Power Distribution:
Single-phase circuits are typical in household...
Single-Phase Power Distribution:
Single-phase circuits are typical in household...
340
Power System Three-Phase Short Circuits
108
Determining the subtransient fault current in a power system involves representing transformers by their leakage reactances, transmission lines by their equivalent series reactances, and synchronous machines as constant voltage sources behind their subtransient reactances. In this analysis, certain elements are excluded, such as winding resistances, series resistances, shunt admittances, delta-Y phase shifts, armature resistance, saturation, saliency, non-rotating impedance loads, and small...
108
Voltage Dividers
542
In electrical circuits, resistors can be connected in series, sequentially linked one after the other. In a series configuration, the same current flows through each resistor. Ohm's law is a fundamental principle to understand the behavior of resistors in series. It expresses the voltage across these resistors in terms of the current and resistance.
Kirchhoff's voltage law implies that the sum of the voltages across the resistors in series equals the source voltage. This means that the...
Kirchhoff's voltage law implies that the sum of the voltages across the resistors in series equals the source voltage. This means that the...
542
Induced Electric Dipoles
4.3K
A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
4.3K

