相关实验视频
Updated: Jun 18, 2026
10:35
Bringing the Visible Universe into Focus with Robo-AO
Published on: February 12, 2013
20.1K
具有广泛视野的自适应光束跟踪和对齐系统,用于光学无线通信
Optics express
|February 18, 2026
概括
本研究介绍了用于光学无线通信 (OWC) 的自适应快速转向镜 (FSM) 系统. 新的两种FSM方法显著提高了高速OWC的视野 (FOV) 和稳定性,使可靠的宽带接入成为可能.
科学领域:
- 光学无线通信 (OWC) 是一种无线通信.
- 自由空间光学自由空间光学
- 光学光束方向盘的方向盘.
背景情况:
- OWC提供高速,最后一英里宽带接入.
- 基于红外线的通信 (IRC) 需要精确的视线 (LOS) 光束方向.
- 现有的机械快速转向镜 (FSM) 在速度和占地面积方面存在限制.
研究的目的:
- 为OWC提出和演示基于FSM的适应性光束跟踪和对齐系统.
- 为了提高OWC传输的视野 (FOV) 和稳定性.
- 为了使OWC系统中的移动用户能够实现高速数据传输.
主要方法:
- 实现适应光学跟踪的两种FSM系统.
- 使用光点接近方法来准确对准光束.
- 使用第一个FSM来纠正光束位移,第二个FSM则用于纠正相对于参考光学轴的入射光束角度.
主要成果:
- FOV从0.05°显著增加到51.85°.
- 高速直角频率分割复杂化 (OFDM) OWC传输实现了89.3 Gbit/s,87.03 Gbit/s和84.47 Gbit/s的速度,分别在3m,10m和20m.
- 该系统满足了硬决策前错误校正 (HD-FEC) 的要求 (BER < 3.8 × 10−3).
结论:
- 拟议的自适应式双FSM系统有效地提高了OWC的FOV和稳定性.
- 这项技术支持高速,可靠的OWC,对未来的宽带接入至关重要.
- 该系统证明了OWC先进应用的实际可行性.
相关概念视频
01:26Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
01:30Electronic Distance Measuring Instruments
Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...