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Related Concept Videos

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

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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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Wavelength selection approach for an incoherent optical detection sensor (LiDAR).

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    |December 28, 2020
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    Summary

    Selecting the optimal central wavelength is crucial for direct detection sensors used in remote sensing. This study develops a metric and searches for the best wavelength for both space and atmospheric conditions.

    Area of Science:

    • Optics and Photonics
    • Remote Sensing Technology
    • Sensor Design

    Background:

    • Direct detection sensors offer simplicity and high performance in clear environments.
    • Established sensor design approaches enable application-specific optimization.
    • Optimal central wavelength selection is critical for active optical sensors.

    Purpose of the Study:

    • To develop a metric for determining the optimal central operational wavelength for direct detection sensors.
    • To identify the optimal wavelength for direct detection sensors in uncluttered (space-like) environments.
    • To identify the optimal wavelength for direct detection sensors considering atmospheric transmission.

    Main Methods:

    • Development of a novel metric for optimal wavelength determination.

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  • Systematic search for the optimal wavelength using generic component sets.
  • Evaluation of wavelength performance under simulated space and atmospheric conditions.

    • Main Results:

    • A quantitative metric for central operational wavelength optimization was established.
    • Optimal wavelengths were identified for direct detection sensors in space-like conditions.
    • Wavelength optimization was performed considering atmospheric transmission effects.

    Conclusions:

    • The developed metric effectively guides the selection of optimal central wavelengths for direct detection sensors.
    • Sensor performance is significantly influenced by the chosen operational wavelength, especially in varying atmospheric conditions.
    • This research provides a framework for optimizing direct detection sensors for diverse remote sensing applications.