相关实验视频
Updated: Jun 24, 2025

06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
9.0K
概括
本研究介绍了双干扰测量的整数锁定技术,即使在具有挑战性的环境中,光学频率 (OFC) 重复率波动,也能确保稳定的测量. 这种方法提高了双干扰计的稳定性,用于更广泛的应用.
科学领域:
- * 光学和光子学 * 光学和光子学
- * 计量学和测量科学 计量学和测量科学
背景情况:
- *双干涉测量 (DCI) 是一种用于高分辨率光谱和计量学的强大技术.
- *环境因素可能会破坏光学频率 (OFC) 重复率的稳定性,影响测量可重复性.
- * 在非理想条件下实现稳定的DCI对于扩大其实际应用至关重要.
研究的目的:
- * 调查OFC重复频率波动对DCI测量的影响.
- * 在非理想的环境中开发一个相锁方案,以实现强大的DCI.
- * 为了在绝对路径长度测量中证明拟议方法的有效性.
主要方法:
- *采用双干涉计设置,使用完全引用的OFC.
- *分析了重复频率变化对干扰图的中心爆发峰值位置的影响.
- * 实施和评估了一种称为"整数锁定条件"的新型相锁定方案.
主要成果:
- *确定了整数锁定条件作为一种方法,以尽量减少重复率波动的影响.
- * 证明在整数锁定下,每次干扰图的采样点数保持不变,尽管频率变化.
- * 在模拟的非理想环境中实现了稳定的相位分辨率测量和准确的绝对路径长度测量.
结论:
- *整数锁定条件为在受控计量实验室之外的强大的双干扰测量提供了一种策略.
- *这种方法在环境干扰的情况下提高了DCI测量的稳定性和可重复性.
- *这些发现为DCI在各种科学和工业领域的更广泛采用铺平了道路.
相关概念视频
Forced Oscillations
6.5K
When an oscillator is forced with a periodic driving force, the motion may seem chaotic. The motions of such oscillators are known as transients. After the transients die out, the oscillator reaches a steady state, where the motion is periodic, and the displacement is determined.
6.5K
Atomic Nuclei: Larmor Precession Frequency
1.3K
The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession,...
1.3K
Time and frequency -Domain Interpretation of Phase-lag Control
88
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...
88
BIBO stability of continuous and discrete -time systems
384
System stability is a fundamental concept in signal processing, often assessed using convolution. For a system to be considered bounded-input bounded-output (BIBO) stable, any bounded input signal must produce a bounded output signal. A bounded input signal is one where the modulus does not exceed a certain constant at any point in time.
To determine the BIBO stability, the convolution integral is utilized when a bounded continuous-time input is applied to a Linear Time-Invariant (LTI) system....
To determine the BIBO stability, the convolution integral is utilized when a bounded continuous-time input is applied to a Linear Time-Invariant (LTI) system....
384
Load-frequency control
155
Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
155
Linear Approximation in Frequency Domain
89
Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
89

