相关实验视频
Updated: Jun 23, 2025
16:11
Implementation of a Reference Interferometer for Nanodetection
Published on: April 26, 2014
9.4K
记录干扰仪在相位敏感OTDR中的不稳定性补偿
Konstantin V Stepanov1, Andrey A Zhirnov1, Tatyana V Gritsenko1
1Laser and Optoelectronic Systems Department, Radio Electronics and Laser Technology Faculty, Bauman Moscow State Technical University, 2-nd Baumanskaya 5-1, 105005 Moscow, Russia.
Sensors (Basel, Switzerland)
|June 19, 2024
概括
一种新方法通过使用3x3光纤合器马赫-泽恩德干扰仪来提高相位敏感光时域反射计 (OTDR) 的相位测量精度. 这种方法可以抑制干扰仪和激光不稳定的错误,改善信号检测,并使温度跟踪成为可能.
科学领域:
- 光电学是指光电子产品.
- 光学传感传感器是什么?
- 计量学 计量学 计量学
背景情况:
- 阶段敏感的光学时域反射计 (OTDR) 对光纤传感至关重要.
- 由于干扰仪和激光不稳定性导致的相位测量错误限制了OTDR的准确性.
- 现有的相解封误差减少方法往往是不够的.
研究的目的:
- 提出和实验验证一种新的方法,用于抑制相位测量错误的相位敏感OTDR.
- 提高OTDR系统中相位测量的准确性和可靠性.
- 开发一种针对常态噪声和环境波动的稳健方法.
主要方法:
- 使用3x3光纤合器实现马赫-泽恩德干扰仪,以提高稳定性.
- 在干扰仪内使用所有三种光探测器进行全面的数据采集.
- 为准确的相位测量开发和应用一种新的补偿计划.
- 实验验证,比较带有和没有建议补偿的测量结果.
主要成果:
- 拟议的方法显著抑制了因干扰仪和激光源不稳定性引起的相位测量误差.
- 使用三个光探测器可以提高相位解封精度,而不是使用一对光探测器.
- 新的补偿计划显示了信号检测的显著改进.
- 该方法可以跟踪缓慢的温度变化,这种功能在使用简单低通波器的系统中缺乏.
结论:
- 开发的技术有效地弥补了常态噪声,从而使相位敏感OTDR的相位测量精度更高.
- 使用基于3x3光纤合器的干扰仪和三光探测器方案为OTDR错误抑制提供了强大的解决方案.
- 这一进步扩大了相位敏感OTDR的适用性,包括其用于环境监测,如温度跟踪.
相关概念视频
01:24Time and frequency -Domain Interpretation of Phase-lead Control
80
Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
80
01:25IR Spectrometers
1.1K
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...
1.1K