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Related Concept Videos

Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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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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Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

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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.
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IR Spectrometers01:25

IR Spectrometers

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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...
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UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

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In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
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UV–Vis Spectrometers01:14

UV–Vis Spectrometers

4.0K
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.
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Updated: Apr 22, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Generation and Coherent Control of Pulsed Quantum Frequency Combs

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Precision spectroscopy using a partially stabilized frequency comb.

M Lyon, S D Bergeson

    Applied Optics
    |October 17, 2014
    PubMed
    Summary
    This summary is machine-generated.

    We developed a simple, unattended optical frequency comb method for precision spectroscopy. This technique achieves kHz-level accuracy for calculating comb mode frequencies, enabling detailed atomic measurements.

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    Area of Science:

    • Atomic, Molecular, and Optical (AMO) Physics
    • Spectroscopy
    • Laser Physics

    Background:

    • Precision spectroscopy requires highly stable and accurate frequency references.
    • Optical frequency combs offer a broad spectrum of discrete, precisely spaced laser frequencies.
    • Traditional frequency comb stabilization can be complex and require constant attention.

    Purpose of the Study:

    • To present a simplified method for precision spectroscopy utilizing a partially stabilized optical frequency comb.
    • To demonstrate the feasibility of an unattended, stable frequency comb system.
    • To assess the capabilities and limitations of this method for atomic measurements.

    Main Methods:

    • Utilizing a 1 GHz repetition rate mode-locked Ti:sapphire laser.
    • Offset-locking one comb mode to a Rubidium (Rb)-stabilized diode laser for partial stabilization.
    • Calculating individual comb mode frequencies using measured offset and repetition rates.

    Main Results:

    • The partially stabilized frequency comb remained locked unattended for extended periods (hours).
    • Absolute frequency uncertainty of approximately 10 kHz was achieved within a 10-second measurement window.
    • Successful demonstration of the method's capabilities and limitations through measurements in Rb, Cesium (Cs), and Calcium (Ca).

    Conclusions:

    • A simple and robust method for precision spectroscopy using a partially stabilized optical frequency comb has been established.
    • The technique provides kHz-level accuracy suitable for various atomic spectroscopy applications.
    • This approach simplifies the operational requirements for frequency comb-based measurements.