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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
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Updated: May 23, 2026

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
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Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

Published on: August 6, 2018

Dual-etalon frequency-comb cavity ringdown spectrometer.

David W Chandler1, Kevin E Strecker

  • 1Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, USA.

The Journal of Chemical Physics
|April 24, 2012
PubMed
Summary
This summary is machine-generated.

This study presents a new spectroscopic method for high-resolution absorption measurements. The technique uses passive etalons for enhanced sensitivity and speed in chemical analysis.

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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

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Last Updated: May 23, 2026

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
08:22

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

Published on: August 6, 2018

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
09:10

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Area of Science:

  • Spectroscopy
  • Physical Chemistry
  • Laser Physics

Background:

  • Traditional absorption spectroscopy often faces limitations in achieving simultaneous broad spectral bandwidth, high frequency resolution, and fast temporal resolution.
  • Active stabilization systems in spectroscopic setups can be complex and costly, hindering accessibility and practical application.

Purpose of the Study:

  • To develop and demonstrate a novel spectroscopic technique for simultaneous broad spectral bandwidth and high-frequency resolution absorption measurements.
  • To achieve high temporal resolution (5 μs) measurements over extended periods (tens of microseconds) without active stabilization.
  • To enhance the sensitivity of absorption spectroscopy by increasing the effective optical path length.

Main Methods:

  • Utilizing two passive air-gap etalons to imprint two frequency comb patterns onto a single pulsed light source.
  • Employing the air-gap etalons as cavity ringdown cells to increase the interrogation path length.
  • Demonstrating the technique with a pulsed dye laser (~0.15 cm(-1) bandwidth) and two confocal air-gap etalons (300 MHz free-spectral range, finesse ~1 × 10(5)).

Main Results:

  • Simultaneous broad spectral bandwidth and high frequency resolution absorption measurements were achieved.
  • High temporal resolution (5 μs) was maintained continuously for tens of microseconds.
  • The technique demonstrated increased sensitivity due to the cavity ringdown effect.
  • Successful investigation of the water (1,1,3) overtone and the O(2) R(7) transition (b(1)Σ(g)(+)←X(3)Σ(g)(-) (2,0) band) with high spectral resolution.

Conclusions:

  • The demonstrated spectroscopic technique offers a robust and sensitive method for high-resolution absorption measurements.
  • The use of passive etalons eliminates the need for active stabilization, simplifying the apparatus.
  • This technique has potential applications in various fields requiring fast and precise chemical analysis.