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Related Concept Videos

Fluorescence and Phosphorescence: Instrumentation01:25

Fluorescence and Phosphorescence: Instrumentation

Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.

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Related Experiment Video

Updated: Jun 11, 2026

Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon
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Published on: February 3, 2023

Fabry-Perot effects in the exponential decay and phase shift reflectivity measurement methods.

M Billardon, M E Couprie, J M Ortega

    Applied Optics
    |June 29, 2010
    PubMed
    Summary

    This study compares exponential decay and phase shift methods for measuring optical cavity losses in real-world conditions. Both techniques effectively measure high reflectivity losses, especially for free electron lasers, with proper precautions.

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    Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
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    Published on: July 21, 2018

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    07:39

    Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

    Published on: July 21, 2018

    Area of Science:

    • Optics and Photonics
    • Laser Physics

    Background:

    • Optical cavities are crucial components in various laser systems.
    • Real-world optical cavities are subject to environmental noise and source fluctuations.
    • Accurate measurement of cavity losses is essential for optimizing laser performance.

    Purpose of the Study:

    • To evaluate the effectiveness of exponential decay and phase shift reflectivity measurement methods.
    • To identify and address challenges associated with these methods in practical optical cavities.
    • To provide guidance for accurate high reflectivity loss measurements.

    Main Methods:

    • Comparative analysis of exponential decay and phase shift reflectivity measurement techniques.
    • Experimental examination of methods under conditions simulating mechanical vibrations and light source fluctuations.
    • Development of strategies to mitigate inherent problems in each measurement method.

    Main Results:

    • Both exponential decay and phase shift methods demonstrate excellent performance for measuring high reflectivity cavity losses.
    • The study identifies specific challenges for each method in real optical cavities.
    • Effective strategies for overcoming these measurement challenges are presented.

    Conclusions:

    • Exponential decay and phase shift methods are viable for high reflectivity loss measurements, particularly in free electron laser applications.
    • Careful implementation and adherence to recommended precautions are necessary for reliable results.
    • The findings contribute to improved characterization of optical cavities.