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関連する概念動画

IR Spectrometers01:25

IR Spectrometers

2.6K
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...
2.6K
Mass Spectrometers01:16

Mass Spectrometers

8.7K
This lesson details the instrumentation of a mass spectrometer—a physical instrument to perform mass spectrometry on analyte molecules and record the characteristic mass spectra. This is achieved via three chief functions:
8.7K
NMR Spectrometers: Overview01:20

NMR Spectrometers: Overview

2.2K
NMR spectrometers consist of a strong magnet, a radiofrequency transmitter, and a detector attached to a computer console for recording spectra of samples containing NMR-active nuclei. In first-generation NMR instruments called continuous-wave spectrometers, the resonance frequencies of the nuclei are determined by frequency-sweep or field-sweep methods. The magnetic field strength is fixed and the rf signal is swept in the former, while the radiofrequency signal is fixed and the magnetic field...
2.2K
UV–Vis Spectrometers01:14

UV–Vis Spectrometers

3.5K
The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
3.5K
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

1.8K
A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
1.8K
NMR Spectrometers: Resolution and Error Correction01:14

NMR Spectrometers: Resolution and Error Correction

1.1K
When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
1.1K

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関連する実験動画

Updated: Jan 28, 2026

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
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Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Published on: December 15, 2021

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逆拡散ソリトンマイクロコンブを使ったヴェルニエスペクトロメーター

Qi-Fan Yang1, Boqiang Shen1, Heming Wang1

  • 1T. J. Watson Laboratory of Applied Physics, California Institute of Technology, Pasadena, CA 91125, USA.

Science (New York, N.Y.)
|February 23, 2019
PubMed
まとめ
この要約は機械生成です。

新しいマイクロレゾナーシステムは,高速で高解像度の光学周波数測定を可能にし,双周波数の精度に匹敵します. この技術はレーザー特徴付けを簡素化し,高度なチップスケールスペクトロメーターの可能性を秘めています.

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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

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High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
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High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

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関連する実験動画

Last Updated: Jan 28, 2026

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
07:42

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Published on: December 15, 2021

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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

Published on: December 22, 2015

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High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
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Published on: September 22, 2017

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科学分野:

  • フォトニックと光学工学
  • スペクトロスコーピー
  • 量子光学

背景:

  • 高解像度レーザー周波数測定は,センシング,スペクトロスコピー,通信のアプリケーションに不可欠です.
  • 従来の方法はしばしば複合的な二重周波数コンシステムに依存しています.

研究 の 目的:

  • 迅速かつブロードバンドの光学周波数測定のための単一のマイクロレゾナーシステムを実証する.
  • 従来の二重周波数チェンジシステムと比べられる相対的な周波数精度を達成する.
  • 高精度でレーザーチューニングのダイナミクスとスペクトルの特徴を特徴づける.

主な方法:

  • 二重ロックされた反伝播ソリトンを利用し,少し異なる繰り返し率を使用した.
  • 単一のマイクロレゾナー内でヴェルニエスペクトロメーターの構成を実装した.
  • 高レーザーチューニング率 (10THz/sまで),ステップチューニングレーザー,多線スペクトル,分子吸収線を測定するためにシステムを適用した.

主要な成果:

  • 高解像度で光学周波数の高速かつブロードバンド測定を達成した.
  • 証明された相対周波数精度は,既知の二重周波数チェンジシステムに匹敵する.
  • 迅速なレーザーチューニング,幅広くステップチューニングされたレーザー,多線スペクトル,分子吸収を成功裏に特徴付けました.

結論:

  • デュアルロックソリトンマイクロレゾナータは,任意の調節されたソースの技術的簡素化と強化された測定能力を提供します.
  • このアプローチは,現在のテーブル上の格子やインターフェロメーターベースのデバイスを上回る性能を持つチップスケールのスペクトロメーターへの道を開きます.
  • この技術は,光学周波数計量学および関連する分野を前進させるのに大きな希望を持っています.