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相关概念视频

IR Spectrometers01:25

IR Spectrometers

2.2K
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
2.2K
Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

990
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
990

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相关实验视频

Updated: Jan 7, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

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频率启用频谱相关反射计,用于分布式光纤传感.

Zhonghong Lin1, Zhiyong Zhao2, Huan He1

  • 1Wuhan National Lab for Optoelectronics (WNLO), School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China.

Light, science & applications
|December 31, 2025
PubMed
概括
此摘要是机器生成的。

使用频率的新光谱分析框架增强了分布式光纤传感. 这种方法显著改善了结构和环境监测的测量速度和动态应变范围.

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科学领域:

  • 物理 物理学 物理
  • 光学工程是指光学工程.
  • 材料科学 材料科学 材料科学

背景情况:

  • 分布式光纤传感对于大规模监控至关重要.
  • 传统方法在速度,动态范围和复杂性方面存在局限性.

研究的目的:

  • 为分布式传感引入通用光谱分析框架.
  • 克服现有的光谱分析技术的局限性.

主要方法:

  • 开发了一种分布式频率,使得频谱相关反射计成为可能.
  • 在相位敏感的光学时域反射计 (φ-OTDR) 系统中实验证明.

主要成果:

  • 在测量速度方面实现了十倍以上的改进.
  • 扩大了动态应变测量范围超过一个数量级.
  • 绕过阶段解封问题和干扰色.

结论:

  • 建立了分布式光谱分析的新范式.
  • 为雷利和布里卢恩传感提供了一个灵活而强大的平台.
  • 对地质物理学,地震学和土木工程的潜在影响.