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Related Concept Videos

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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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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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...
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Atomic Emission Spectroscopy: Instrumentation01:22

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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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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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Fast and high-resolution spectroscopy based on asynchronous optical sampling.

Ningning Yang, Danlu Wang, Hao Hu

    Optics Express
    |April 27, 2022
    PubMed
    Summary
    This summary is machine-generated.

    Time-stretch spectroscopy now offers high precision for ultrafast applications. This advanced technique achieves 1-pm spectral resolution and a 1-kHz frame rate, overcoming previous limitations in spectral observation.

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    Area of Science:

    • Ultrafast spectroscopy
    • Optical physics
    • Spectroscopic instrumentation

    Background:

    • Dispersive time stretch spectroscopy enables high frame rates for ultrafast applications.
    • Current limitations in spectral resolution (tens of picometers) hinder high-precision measurements.
    • Temporal aperture and acquisition bandwidth restrict performance.

    Purpose of the Study:

    • To enhance the spectral resolution and observation capabilities of time-stretch spectroscopy.
    • To overcome the fundamental and technical limitations of existing time-stretch methods.
    • To enable high-precision spectral dynamics observation.

    Main Methods:

    • Implemented a large-aperture time lens with higher-order dispersion compensation.
    • Utilized asynchronous optical sampling with two frequency combs.
    • Developed a novel time-stretch spectroscopy scheme.

    Main Results:

    • Achieved a 1-pm spectral resolution.
    • Demonstrated a 24-nm observation bandwidth.
    • Reached a 1-kHz frame rate for spectral acquisition.
    • Successfully observed spectral dynamics in random lasing and narrow spectral width devices.

    Conclusions:

    • The developed scheme significantly improves time-stretch spectroscopy for high-precision applications.
    • Overcoming time-bandwidth product and acquisition bandwidth limits is crucial.
    • This advancement opens new possibilities for studying ultrafast spectral phenomena.