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Related Concept Videos

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
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A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
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IR Spectroscopy: Molecular Vibration Overview

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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
14:18

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

Frequency-modulation-polarization spectroscopy.

M Romagnoli, M D Levenson, G C Bjorklund

    Optics Letters
    |September 1, 2009
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a sensitive technique combining frequency-modulation and polarization spectroscopy to detect anisotropic spectral features. The method was validated using iodine vapor, demonstrating its potential for laser noise suppression.

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    Published on: August 6, 2018

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    Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
    14:18

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    Published on: February 28, 2016

    Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
    08:22

    Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

    Published on: August 6, 2018

    Area of Science:

    • Atomic, Molecular, and Optical Physics
    • Spectroscopy
    • Laser Technology

    Background:

    • Spectroscopic techniques are crucial for analyzing material properties.
    • Detecting anisotropic spectral features requires high sensitivity and precision.
    • Existing methods may face limitations in sensitivity or laser noise.

    Purpose of the Study:

    • To develop a novel spectroscopic method for sensitive detection of anisotropic spectral features.
    • To demonstrate the versatility of the technique in line shape analysis.
    • To showcase the potential for laser noise suppression.

    Main Methods:

    • Combined frequency-modulation spectroscopy and polarization spectroscopy.
    • Utilized saturation holes in iodine vapor as a test medium.
    • Analyzed anisotropic spectral features and line shapes.

    Main Results:

    • Successfully detected anisotropic spectral features with high sensitivity.
    • Demonstrated the capability to generate various spectral line shapes.
    • Showcased the effectiveness of the technique in suppressing laser noise.

    Conclusions:

    • The combined frequency-modulation and polarization spectroscopy offers a sensitive approach for detecting anisotropic spectral features.
    • This technique provides flexibility in line shape analysis and effective laser noise reduction.
    • The method is validated and shows promise for various spectroscopic applications.