概括
本研究介绍了一种深度学习方法,用于精确控制高功率轨道角动量 (OAM) 束中的相位. 它增强了连贯的光束组合,以改善自由空间光通信系统.
科学领域:
- 光学和光子学 在光学和光子学.
- 激光物理 激光物理
- 光学通信是指光学通信.
背景情况:
- 轨道角动量 (OAM) 束对于激光通信和光学成像等先进应用至关重要.
- 高功率,高质量的束对于远距离自由空间光学通信至关重要.
- 连贯光束组合 (CBC) 可以提高功率,同时保持光束质量,但快速相锁仍然是一个挑战.
研究的目的:
- 开发一种高效的方法来快速锁定高功率光学系统中束的相位.
- 为了克服激光相位阵列中传统相位控制方法的局限性.
- 提高使用OAM光束的自由空间光通信的容量和可靠性.
主要方法:
- 提出了一种使用螺旋相调节的深度学习方法.
- 一个专门的损失函数被设计来消除相周期性,创建一个非线性映射.
- 引入了电力在桶 (PIB) 度量来提高相位预测的准确性和减轻动态相位错误.
主要成果:
- 深度学习模型成功地建立了子光束阶段和远场图像之间的非线性映射.
- 该PIB指标有效地减轻了动态相位错误,提高了相位预测的准确性.
- 拟议的方法表明了产生高功率旋转束和连贯组合的潜力.
结论:
- 这种基于深度学习的方法为OAM光束系统的精确相位控制提供了有前途的解决方案.
- 这种技术可以显著提高高功率束光学系统的性能,特别是那些采用连贯组合的系统.
- 这些发现有助于推进自由空间光通信和其他基于OAM的技术.
相关概念视频
01:22Phase-lead and Phase-lag Controllers
226
Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass...
226
01:10Angular Momentum: Single Particle
6.6K
Angular momentum is directed perpendicular to the plane of the rotation, and its magnitude depends on the choice of the origin. The perpendicular vector joining the linear momentum vector of an object to the origin is called the “lever arm.” If the lever arm and linear momentum are collinear, then the magnitude of the angular momentum is zero. Therefore, in this case, the object rotates about the origin such that it lies on the rim of the circumference defined by the lever arm...
6.6K
01:18Conservation of Angular Momentum: Application
11.4K
A system's total angular momentum remains constant if the net external torque acting on the system is zero. Examples of such systems include a freely spinning bicycle tire that slows over time due to torque arising from friction, or the slowing of Earth's rotation over millions of years due to frictional forces exerted on tidal deformations. However in the absence of a net external torque, the angular momentum remains conserved. The conservation of angular momentum principle requires a...
11.4K
01:09Conservation of Angular Momentum
10.7K
A system's total angular momentum remains constant if the net external torque acting on the system is zero. Considering a system that consists of n tiny particles, the angular momentum of any tiny particle may change, but the system's total angular momentum would remain constant. The principle of conservation of angular momentum only considers the net external torque acting on the system. While there are internal forces exerted by different particles within the system that also produce...
10.7K
03:35Hybridization of Atomic Orbitals II
33.7K
sp3d and sp3d 2 Hybridization
33.7K
01:21Time and frequency -Domain Interpretation of Phase-lag Control
148
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...
148