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Related Concept Videos

IR Spectrometers01:25

IR Spectrometers

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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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Infrared (IR) Spectroscopy: Overview01:09

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When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
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Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

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In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
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IR Spectroscopy: Molecular Vibration Overview01:24

IR Spectroscopy: Molecular Vibration Overview

3.0K
When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
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3.0K
Atomic Absorption Spectroscopy: Interference01:25

Atomic Absorption Spectroscopy: Interference

1.1K
Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
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IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations01:08

IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations

1.2K
Identical bonds within a polyatomic group can stretch symmetrically (in-phase) or asymmetrically (out-of-phase). Similar to hydrogen bonding, these vibrations also influence the shape of the IR peak. Generally, asymmetric stretching frequencies are higher than symmetric stretching frequencies. For example, primary amines exhibit two distinct IR peaks between 3300–3500 cm−1 corresponding to the symmetric and asymmetric N-H stretching, while secondary amines exhibit a single...
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Updated: Sep 26, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

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Spectral Interferometry with Frequency Combs.

Krishna Twayana1, Israel Rebolledo-Salgado1,2, Ekaterina Deriushkina1

  • 1Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-41296 Gothenburg, Sweden.

Micromachines
|April 23, 2022
PubMed
Summary
This summary is machine-generated.

Laser frequency combs revolutionize linear interferometry, enhancing techniques like Fourier transform spectroscopy. These advancements offer significant improvements for molecular spectroscopy and optical coherence tomography applications.

Keywords:
laser frequency combsmicroresonatorsoptical coherence tomographyoptical frequency domain reflectometryoptical signal processingoptical spectroscopysilicon photonicsspectral interferometryswept-wavelength interferometry

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Area of Science:

  • Optics and Photonics
  • Spectroscopy
  • Metrology

Background:

  • Linear interferometric techniques are fundamental in various scientific fields.
  • Laser frequency combs offer unique spectral properties for enhanced measurements.
  • Existing interferometric methods can be limited by spectral resolution and stability.

Purpose of the Study:

  • To provide a comprehensive review of linear interferometric techniques utilizing laser frequency comb sources.
  • To detail diverse interferometric methods, including Fourier transform spectroscopy, linear spectral interferometry, and swept-wavelength interferometry.
  • To highlight the advantages and applications of laser frequency combs in interferometry.

Main Methods:

  • Review of state-of-the-art linear interferometric techniques.
  • Detailed examination of Fourier transform spectroscopy, linear spectral interferometry, and swept-wavelength interferometry.
  • Analysis of unique features and applications of laser frequency comb sources.

Main Results:

  • Laser frequency combs significantly enhance linear interferometric techniques.
  • Demonstration of applications in molecular spectroscopy, optical coherence tomography, and photonic device characterization.
  • Discussion of the impact of chip-scale swept sources and frequency combs.

Conclusions:

  • Laser frequency combs represent a significant advancement in linear interferometry.
  • These techniques offer improved performance for spectroscopy and metrology.
  • Future developments in chip-scale technology promise further integration and application.