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

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...

You might also read

Related Articles

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

Sort by

Same author

Formation of 5-methyl-2-furanmethanol which is a caramel flavor compound in the glutamic acid-glucose Maillard reaction: A ReaxFF-DFT study.

Current research in food science·2026

Same author

Impact of Amadori rearrangement products of cysteine-xylose-glutamic acid on meat flavor development.

Food research international (Ottawa, Ont.)·2026

Same author

Development and Validation of a Nomogram for Predicting Hyperuricemia in Perimenopausal Women.

International journal of general medicine·2025

Same author

Chemical constituents from the endophytic fungus <i>Aspergillus</i> sp. S3 of <i>Hibiscus tiliaceus</i>.

Journal of Asian natural products research·2024

Same author

Effects of Particle Size on Mechanical Properties and Forming Accuracy of <i>Prosopis chilensis</i> Powder/Polyethersulfone Composites Produced via Selective Laser Sintering.

Polymers·2024

Same author

Epitaxial Growth of Large-Scale 2D CrTe<sub>2</sub> Films on Amorphous Silicon Wafers With Low Thermal Budget.

Advanced materials (Deerfield Beach, Fla.)·2024

Search research articles

Related Experiment Video

Updated: Jun 4, 2026

A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks

A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks

Published on: April 28, 2023

[System parameters selection and optimization of tunable diode laser absorption spectroscopy].

Nan Gao¹, Zhen-Hui Du, Mia Tang

¹College of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China. dimflame@tju.edu.cn

Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu

|February 17, 2011

Summary

Optimizing modulation parameters like index and frequency is crucial for tunable diode laser absorption spectroscopy (TDLAS) system performance. This study provides experimental data and methods for selecting optimal parameters based on specific measurement needs.

More Related Videos

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

Published on: September 22, 2017

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: Jun 4, 2026

A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks

A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks

Published on: April 28, 2023

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

Published on: September 22, 2017

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
Analytical Chemistry

Context:

Tunable diode laser absorption spectroscopy (TDLAS) is sensitive to modulation parameters.
Lack of clear guidelines for parameter selection hinders practical TDLAS applications.
System performance is influenced by modulation index, frequency, scanning amplitude, and scanning frequency.

Purpose:

To investigate the impact of modulation parameters on TDLAS second harmonic signals.
To establish a basis and method for optimizing modulation parameters in TDLAS.
To analyze signal characteristics like amplitude, signal-to-noise ratio, symmetry, and peak width.

Summary:

Experimental analysis reveals how modulation parameters affect TDLAS second harmonic signals.
Parameter optimization strategies are proposed based on signal characteristics for different detection goals (concentration, temperature, pressure).
For concentration/temperature detection, prioritize amplitude and signal-to-noise ratio by optimizing modulation index, and lowering modulation/scanning frequencies.
For pressure detection, focus on signal symmetry and peak width by adjusting modulation parameters.
Scanning amplitude is set for complete waveforms, followed by scanning frequency adjustment for system speed and accuracy.

Impact:

Provides a definitive basis for configuring TDLAS systems.
Enhances the reliability and accuracy of TDLAS measurements.
Facilitates the practical application of TDLAS in various fields.