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

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...

Atomic Absorption Spectroscopy: Instrumentation

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...

You might also read

Related Articles

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

Sort by

Same author

The pathogenic role of the canonical Wnt pathway in age-related macular degeneration.

Investigative ophthalmology & visual science·2009

Same author

Identification of small-molecule HSF1 amplifiers by high content screening in protection of cells from stress induced injury.

Biochemical and biophysical research communications·2009

Same author

Nanowire transformation by size-dependent cation exchange reactions.

Nano letters·2009

Same author

Effect of haishengsu as an adjunct therapy for patients with advanced renal cell cancer: a randomized and placebo-controlled clinical trial.

Journal of alternative and complementary medicine (New York, N.Y.)·2009

Same author

Identification of inhibitors of HSF1 functional activity by high-content target-based screening.

Journal of biomolecular screening·2009

Same author

Antitumor effects of targeting hTERT lentivirus-mediated RNA interference against KB cell lines.

Oncology research·2009

Search research articles

Related Experiment Video

Updated: Jun 23, 2026

Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems

Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems

Published on: February 10, 2020

Precise wavelength calibration in continuous-wave cavity ringdown spectroscopy based on the HITRAN database.

Zhongqi Tan¹, Xingwu Long, Jie Yuan

¹Department of Optoelectronic Engineering, College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China. zhqitan@sina.com

|April 22, 2009

Summary

This summary is machine-generated.

This study presents a new wavelength calibration method for narrowband laser diodes used in continuous-wave cavity ringdown spectroscopy (CRDS). The technique achieves high precision by using spectral lines from the HITRAN 2004 database, improving accuracy fourfold over conventional methods.

More Related Videos

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic

Published on: August 25, 2016

Related Experiment Videos

Last Updated: Jun 23, 2026

Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems

Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems

Published on: February 10, 2020

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic

Published on: August 25, 2016

Area of Science:

Spectroscopy
Laser Physics
Atmospheric Science

Background:

Cavity Ringdown Spectroscopy (CRDS) is a sensitive technique for measuring trace gases.
Accurate wavelength calibration of laser sources is crucial for CRDS performance.
Existing methods for laser diode calibration may lack sufficient precision for certain applications.

Purpose of the Study:

To develop and demonstrate a precise wavelength calibration method for narrowband laser diodes in continuous-wave (CW) CRDS.
To refine the wavelength-current relationship of laser diodes using known spectral lines.
To improve the precision of wavelength measurements in CRDS systems.

Main Methods:

Utilized known spectral lines from the HITRAN 2004 database as wavelength markers.
Developed a compact CW CRDS apparatus employing a distributed feedback (DFB) laser diode.
Employed a 25 cm glass ceramic cavity as the spectroscopic cell.

Main Results:

Achieved a wavelength precision of approximately 0.8 x 10(-3) cm(-1).
The demonstrated method showed approximately four times greater precision than conventional techniques.
Successfully calibrated a 1.517 micrometer DFB laser diode.

Conclusions:

The described method provides a highly precise approach for wavelength calibration of laser diodes in CRDS.
Leveraging the HITRAN 2004 database significantly enhances calibration accuracy.
This technique is valuable for applications requiring precise spectroscopic measurements.