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

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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.

Confocal Fluorescence Microscopy

Confocal Fluorescence Microscopy

Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...

You might also read

Related Articles

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

Sort by

Same author

Breath testing for intra-abdominal infection: appendicitis, a preliminary study.

Journal of breath research·2020

Same author

Multi-mode absorption spectroscopy using a quantum cascade laser for simultaneous detection of NO and H<sub>2</sub>O.

Applied physics. B, Lasers and optics·2020

Same author

Measurement of breath acetone in patients referred for an oral glucose tolerance test.

Journal of breath research·2018

Same author

SU-E-T-420: Development of a Comprehensive Linac-Based Quality Assurance Procedure for Retrofitted Micro-MLC SRS System.

Medical physics·2017

Same author

M-line spectroscopy on mid-infrared Si photonic crystals for fluid sensing and chemical imaging.

Optics express·2016

Same author

A Multipronged Comparative Study of the Ultraviolet Photochemistry of 2-, 3-, and 4-Chlorophenol in the Gas Phase.

The journal of physical chemistry. A·2015

Search research articles

Related Experiment Video

Updated: May 8, 2026

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

Linear cavity optical-feedback cavity-enhanced absorption spectroscopy with a quantum cascade laser.

A G V Bergin¹, G Hancock, G A D Ritchie

¹Department of Chemistry, The Physical and Theoretical Chemistry Laboratory, The University of Oxford, Oxford, UK.

|August 14, 2013

Summary

A new optical-feedback cavity-enhanced absorption spectroscopy (OF-CEAS) method using a quantum cascade laser achieves high sensitivity for NO detection. This technique demonstrates a noise-equivalent absorption coefficient of 2.4×10(-8) cm(-1).

More Related Videos

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Related Experiment Videos

Last Updated: May 8, 2026

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Area of Science:

Spectroscopy
Laser Technology
Chemical Sensing

Background:

Cavity-enhanced absorption spectroscopy (CEAS) offers high sensitivity for trace gas detection.
Quantum cascade lasers (QCLs) provide compact and tunable mid-infrared sources.
Optical feedback can enhance the performance of laser-based spectroscopic techniques.

Purpose of the Study:

To demonstrate optical-feedback cavity-enhanced absorption spectroscopy (OF-CEAS) at 5.5 μm.
To achieve high sensitivity and temporal stability for gas detection.
To evaluate the performance for nitrogen monoxide (NO) detection.

Main Methods:

Utilized a continuous-wave distributed feedback quantum cascade laser (cw DFB-QCL).
Coupled the DFB-QCL to a two-mirror linear optical cavity.
Implemented OF-CEAS to measure absorption spectra.

Main Results:

Successfully demonstrated OF-CEAS at 5.5 μm.
Achieved a noise-equivalent absorption coefficient, α(min), of 2.4×10(-8) cm(-1) with 1-second averaging.
Identified etalon-fringing as the limiting factor for sensitivity.
Demonstrated NO detection down to 5 parts per billion (ppb) within 2 seconds due to temporal stability.

Conclusions:

OF-CEAS using a cw DFB-QCL is a viable technique for sensitive gas detection at 5.5 μm.
The system exhibits excellent temporal stability, enabling rapid and low-level detection of gases like NO.
Further improvements may involve mitigating etalon-fringing effects to enhance sensitivity.