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IR Spectrometers

IR Spectrometers

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...

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Updated: May 28, 2025

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Published on: December 3, 2013

带有多频谱光谱的冷光光学时钟

William G Tobias^1,2, Bryan Hemingway², Steven Peil²

¹Computational Physics, Inc., 8001 Braddock Road, Suite 210, Springfield, Virginia 22151, USA.

Physical review letters

|February 14, 2025

概括

此摘要是机器生成的。

我们使用激光冷却的-40原子开发了一个紧的光学时钟. 这通过增强边缘振幅和减少频率不确定性来改善原子钟的性能.

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A Simple Dewar/Cryostat for Thermally Equilibrating Samples at Known Temperatures for Accurate Cryogenic Luminescence Measurements

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Published on: July 19, 2016

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

Published on: December 18, 2015

相关实验视频

Last Updated: May 28, 2025

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Published on: December 3, 2013

A Simple Dewar/Cryostat for Thermally Equilibrating Samples at Known Temperatures for Accurate Cryogenic Luminescence Measurements

A Simple Dewar/Cryostat for Thermally Equilibrating Samples at Known Temperatures for Accurate Cryogenic Luminescence Measurements

Published on: July 19, 2016

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

Published on: December 18, 2015

科学领域:

原子物理原子物理
光学时钟的使用方法
频谱学是一种光谱学.

背景情况:

光学时钟需要精确的原子询问.
拉姆西-波德干涉计是原子钟的一个关键技术.
激光冷却显著提高了原子样品的质量.

研究的目的:

为了展示使用激光冷却40Ca的紧光学时钟.
为了提高原子钟中的Ramsey-Bordé干扰度的性能.
在光学时钟中实现高精度和稳定性.

主要方法:

使用激光冷却来降低Ca原子的速度.
采用Ramsey-Bordé干涉度与一个紧的设置.
为光谱学实施量身定制的相位和强度调制.

主要成果:

由于原子速度和温度的降低,实现了低于kHz的线宽边缘.
拉姆西-波德边缘幅度增加了14的倍数.
在1秒平均时间内达到3.4×10^{-15}的艾伦偏差.

结论:

激光冷却的Ca束使高性能紧型光学时钟成为可能.
优化的光谱技术显著提高了时钟信号质量.
展示的时钟显示了精确计时和频率标准的潜力.