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

Standing Waves in a Cavity

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:

Double Resonance Techniques: Overview

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...

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...

You might also read

Related Articles

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

Sort by

Same author

20-Hydroxyeicosatetraenoic acid impairs endothelial insulin signaling by inducing phosphorylation of the insulin receptor substrate-1 at Ser616.

PloS one·2014

Same author

Exophytic gastrointestinal stromal tumor with cystic changes: A case report.

Oncology letters·2014

Same author

Hydrogen sulfide attenuates the recruitment of CD11b⁺Gr-1⁺ myeloid cells and regulates Bax/Bcl-2 signaling in myocardial ischemia injury.

Scientific reports·2014

Same author

[The hemodynamics study and application of the reversed descending branch of lateral circumflex femoral artery].

Zhonghua zheng xing wai ke za zhi = Zhonghua zhengxing waike zazhi = Chinese journal of plastic surgery·2014

Same author

Epigallocatechin gallate (EGCG) attenuates infrasound-induced neuronal impairment by inhibiting microglia-mediated inflammation.

The Journal of nutritional biochemistry·2014

Same author

Survival benefit of traditional chinese herbal medicine (a herbal formula for invigorating spleen) in gastric cancer patients with peritoneal metastasis.

Evidence-based complementary and alternative medicine : eCAM·2014

Search research articles

Related Experiment Video

Updated: May 8, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Continuous-wave cavity ringdown spectroscopy based on the control of cavity reflection.

Zhixin Li¹, Weiguang Ma, Xiaofang Fu

¹State Key Laboratory of Quantum Optics and Quantum Optics Devices, Laser Spectroscopy Laboratory, Shanxi University, Taiyuan 030006, China.

|August 14, 2013

Summary

A novel cavity ringdown spectrometer using cavity reflection control enhances trace gas detection sensitivity. This new method significantly improves minimum detectable absorption for precise gas analysis.

More Related Videos

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Related Experiment Videos

Last Updated: May 8, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Area of Science:

Spectroscopy
Analytical Chemistry
Laser Physics

Background:

Cavity ringdown spectroscopy (CRS) is a sensitive technique for trace gas detection.
Traditional CRS methods often rely on transmission measurements, which can be limited by optical switch performance.
Improving the sensitivity and accuracy of CRS is crucial for various applications, including environmental monitoring and industrial process control.

Purpose of the Study:

To design and evaluate a new continuous-wave cavity ringdown spectrometer (cw-CRDS) utilizing cavity reflection control.
To enhance the sensitivity and reduce the minimum detectable absorption for trace gas analysis.
To compare the performance of reflection control mode with traditional transmission control mode.

Main Methods:

Developed a cw-CRDS system that separates ringdown event acquisition from optical switch triggering by detecting cavity reflection and transmission.
Implemented synchronous scanning of laser frequency and cavity length to prevent erroneous ringdown time extraction.
Performed statistical analysis of measured ringdown times to determine minimum detectable absorption.

Main Results:

The frequency-normalized minimum detectable absorption in reflection control mode was 1.7 × 10⁻⁹ cm⁻¹ Hz⁻¹/², a 5.4-fold improvement over transmission control mode.
The signal-to-noise ratio of the absorption spectrum showed a 3-fold improvement, despite limitations from the etalon effect.
Measured peak absorption coefficients for a C₂H₂ transition agreed well with theoretical values across different pressures.

Conclusions:

The developed cavity reflection control cw-CRDS offers superior sensitivity for trace gas detection compared to transmission-based methods.
Synchronous scanning is effective in mitigating errors during ringdown time analysis.
Further optimization is needed to fully overcome the etalon effect and maximize signal-to-noise ratio improvements.