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Related Concept Videos

¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are slanted or...
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis. This...
NMR Spectrometers: Resolution and Error Correction01:14

NMR Spectrometers: Resolution and Error Correction

When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
Doppler Effect - I00:56

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The Doppler effect and Doppler shift were named after the Austrian physicist and mathematician Christian Johann Doppler in 1842, who conducted experiments with both moving sources and moving observers. Consider an observer standing on a street corner, observing an ambulance with a siren sound passing by at a constant speed. The observer experiences two characteristic changes in the sound of the siren. Initially, the sound increases in loudness as the ambulance approaches and decreases in...
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The de Broglie Wavelength

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Related Experiment Video

Updated: Jun 23, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
10:17

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

The dynamical lorentz shift in an extended optically dense superradiant amplifier.

J Manassah, B Gross

    Optics Express
    |April 18, 2009
    PubMed
    Summary

    Superradiant amplifiers exhibit modified spectral shifts due to the Dynamical Lorentz Shift in specific length domains. Broken spatial inversion symmetry causes this spectral asymmetry in transmitted and reflected signals.

    Area of Science:

    • Quantum optics
    • Atomic physics
    • Condensed matter physics

    Background:

    • Superradiant amplifiers are crucial for coherent light generation.
    • Understanding spectral properties is key to controlling amplifier output.
    • Dynamical Lorentz Shift effects are important in dense optical media.

    Purpose of the Study:

    • To compute spectral distributions of transmitted and reflected signals from an extended optically dense superradiant amplifier.
    • To investigate the influence of amplifier length on spectral shifts.
    • To identify the origin of spectral asymmetry in superradiant amplifiers.

    Main Methods:

    • Numerical computation of spectral distributions.
    • Analysis of signal transmission and reflection.

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    Published on: May 18, 2011

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    Last Updated: Jun 23, 2026

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    10:17

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    Published on: July 12, 2017

    Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy
    15:04

    Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy

    Published on: May 18, 2011

  • Investigation of population difference distribution and spatial inversion symmetry.

    • Main Results:

    • Spectral distributions of transmitted and reflected signals were computed.
    • Frequency shifts were modified by the Dynamical Lorentz Shift under specific conditions (amplifier length near half-wavelength multiples).
    • Broken spatial inversion symmetry was identified as the cause of spectral asymmetry.

    Conclusions:

    • The Dynamical Lorentz Shift significantly impacts spectral distributions in superradiant amplifiers.
    • Amplifier length and broken spatial inversion symmetry are critical factors for spectral asymmetry.
    • Findings provide insights into controlling spectral properties of superradiant devices.