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Related Concept Videos

IR Spectrometers01:25

IR Spectrometers

There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
UV–Vis Spectrometers01:14

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...
Raman Spectroscopy Instrumentation: Overview01:26

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: Instrumentation01:22

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...
Infrared (IR) Spectroscopy: Overview01:09

Infrared (IR) Spectroscopy: Overview

When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

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.

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Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
09:38

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

Published on: December 18, 2015

Infared diode laser double-beam spectrometer.

M Dubs, H H Günthard

    Applied Optics
    |March 6, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A new spectrometer design enables high-resolution infrared absorption spectra recording using diode lasers. This adaptable optical setup and double-beam technique minimize laser power variations for accurate spectral analysis.

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

    Background:

    • High-resolution infrared (IR) absorption spectroscopy is crucial for molecular analysis.
    • Diode lasers offer specific advantages for spectroscopic applications.
    • Existing spectrometer designs may have limitations in adaptability and precision.

    Purpose of the Study:

    • To present a complete spectrometer system optimized for high-resolution IR absorption spectra.
    • To demonstrate the adaptability of the optical assembly for diode lasers and other sources.
    • To address challenges in optical alignment and signal detection for improved performance.

    Main Methods:

    • Development of a specialized optical assembly tailored for diode laser characteristics.
    • Implementation of a double-beam technique to compensate for laser power fluctuations.
    • Detailed discussion of optical alignment procedures and electronic signal detection strategies.

    Main Results:

    • The presented spectrometer achieves high-resolution IR absorption spectra.
    • The optical assembly is versatile, accommodating diode lasers and other laser types.
    • The double-beam method effectively eliminates variations in laser power, enhancing data reliability.

    Conclusions:

    • The developed spectrometer provides a robust platform for high-resolution IR absorption spectroscopy.
    • The system's adaptability and noise-reduction techniques make it suitable for various laser sources and demanding applications.
    • The presented work offers valuable insights into spectrometer design and spectral data acquisition.