Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Gas Chromatography: Types of Detectors-II

Gas Chromatography: Types of Detectors-II

In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...

Gas Chromatography: Types of Detectors-I

Gas Chromatography: Types of Detectors-I

There are different types of detectors used in gas chromatography, each with its own specific properties that make it suitable for detecting certain types of analytes. The most commonly used detectors in GC are thermal conductivity detector (TCD), flame ionization detector (FID), and electron capture detector (ECD).
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...

Gas Chromatography: Overview of Detectors

Gas Chromatography: Overview of Detectors

Detectors in gas chromatography (GC) help identify and quantify the components of a mixture by translating chemical properties into measurable signals, which are displayed on a chromatogram. Detectors can be categorized into two main types: destructive and non-destructive.
A non-destructive detector allows a sample to be analyzed without altering or consuming it, meaning the sample can be collected after detection for further analysis. Examples include thermal conductivity detectors and...

Raman Spectroscopy Instrumentation: Overview

Raman Spectroscopy Instrumentation: Overview

A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...

UV–Vis Spectrometers

UV–Vis Spectrometers

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. Samples for...

IR Spectroscopy: Molecular Vibration Overview

IR Spectroscopy: Molecular Vibration Overview

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.
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Coherence-multiplexed FMCW spectroscopy for long-distance multi-point gas sensing.

Optics letters·2026

Same author

Multi-point multi-component gas sensing by frequency-modulated continuous-wave interferometry.

Optics express·2025

Same author

Single-shot, multi-point remote gas sensing by a linearly chirped laser pulse.

Optics letters·2024

Same author

Turning bad into good: A medium-entropy double perovskite oxide with beneficial surface reconstruction for active and robust cathode of solid oxide fuel cells.

Journal of colloid and interface science·2024

Same author

Multipoint dispersion spectroscopic gas sensing by optical FMCW interferometry.

Optics letters·2021

Same author

Elemental mercury sensing by synchronously sweeping two multimode diode lasers.

Applied optics·2020

Search research articles

Related Experiment Video

Updated: Jul 5, 2026

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Published on: March 22, 2019

Gas detection by correlation spectroscopy employing a multimode diode laser.

Xiutao Lou¹, Gabriel Somesfalean, Zhiguo Zhang

¹Department of Physics, Harbin Institute of Technology, Harbin 150001, China.

|May 2, 2008

Summary

A novel gas sensor uses a multimode diode laser (MDL) for accurate carbon dioxide (CO2) detection, even with interfering carbon monoxide (CO). This gas sensor technology offers reliable measurements for environmental monitoring.

More Related Videos

Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers

Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers

Published on: August 18, 2017

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C₂, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Published on: February 14, 2014

Related Experiment Videos

Last Updated: Jul 5, 2026

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Published on: March 22, 2019

Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers

Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers

Published on: August 18, 2017

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C₂, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Published on: February 14, 2014

Area of Science:

Spectroscopy
Laser Technology
Environmental Science

Background:

Gas detection is crucial for environmental monitoring and industrial safety.
Traditional methods can be limited by interfering gases and complex spectra.
Multimode diode lasers (MDLs) offer a cost-effective light source for spectroscopic applications.

Purpose of the Study:

To develop a gas sensor utilizing the gas-correlation technique with a multimode diode laser (MDL).
To demonstrate accurate measurement of carbon dioxide (CO2) in the presence of interfering carbon monoxide (CO).
To validate the utility of MDLs as a viable light source for gas detection.

Main Methods:

A dual-beam detection scheme was employed using a tunable 1570 nm MDL.
Gas-correlation technique was applied for selective CO2 detection.
Statistical procedures, including correlation analysis and outlier identification, were used to exclude interfering signals.
Linear regression was used to retrieve gas concentration from correlated signals.

Main Results:

Successful measurement of CO2 concentration in a mixture with CO was achieved.
Overlapping absorption spectra and laser mode hops did not prevent accurate detection.
Interfering signals from CO were effectively excluded.
Reliable and accurate CO2 concentration retrieval was demonstrated.

Conclusions:

The developed gas sensor effectively measures CO2 using gas-correlation technique and MDLs.
MDLs are suitable and cost-effective light sources for gas detection applications.
Statistical signal processing enhances the robustness of MDL-based gas sensors against interference.