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Related Concept Videos

NMR Spectrometers: Resolution and Error Correction01:14

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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...
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Related Experiment Video

Updated: Feb 13, 2026

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
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Compact high-resolution spectrometer using two plane gratings with triple dispersion.

Yajun Pang, Yinxin Zhang, Huaidong Yang

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    |March 14, 2018
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    Summary

    This study presents a compact spectrometer using two gratings for triple dispersion, achieving high spectral resolution. A prototype demonstrated a precision of 36 pm, showcasing its effectiveness for detailed spectral analysis.

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    Area of Science:

    • Optical Engineering
    • Spectroscopy
    • Instrumentation Science

    Background:

    • High-resolution spectrometers are crucial for detailed spectral analysis.
    • Existing compact spectrometer designs often face limitations in resolution and performance.

    Purpose of the Study:

    • To demonstrate a novel compact spectrometer design with enhanced spectral resolution.
    • To validate the performance of the proposed triple dispersion (TD) spectrometer scheme.

    Main Methods:

    • Utilized a spectrometer scheme with two plane gratings, incorporating triple dispersion (TD).
    • Developed rigorous formulae for the spectrometer design and performed simulations with 1050 lines/mm gratings.
    • Constructed and tested a physical prototype of the spectrometer.

    Main Results:

    • The spectrometer design leverages triple dispersion (TD) for increased resolution.
    • Design simulations were performed and discussed for a two-grating system.
    • The built prototype achieved a spectral resolution precision of 36 pm.

    Conclusions:

    • The demonstrated compact spectrometer design effectively enhances spectral resolution through triple dispersion (TD).
    • The prototype's performance validates the theoretical design, offering a precise tool for spectral measurements.