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Related Concept Videos

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...

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Related Experiment Video

Updated: Jun 7, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

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Published on: August 12, 2013

Transverse modes in laser cavities terminating in reflective multipass interferometers.

E Nichelatti, G Salvetti

    Applied Optics
    |November 6, 2010
    PubMed
    Summary

    Reflective multipass interferometers influence laser transverse modes. Researchers used geometric parameters to analyze these modes in a CO2 laser, revealing mode-selective properties.

    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Cavity Quantum Electrodynamics

    Background:

    • Transverse modes dictate laser beam quality and performance.
    • Reflective multipass interferometers are optical systems with potential applications in laser resonators.
    • Understanding mode behavior in laser cavities is crucial for advanced laser design.

    Purpose of the Study:

    • To investigate the impact of reflective multipass interferometers on laser transverse modes.
    • To establish a method for deriving transverse mode characteristics using equivalent geometric parameters.
    • To explain the mode-selective capabilities of multimirror laser cavities.

    Main Methods:

    • Theoretical analysis of laser cavity configurations with reflective multipass interferometers.

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    Last Updated: Jun 7, 2026

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  • Experimental investigation using a pulsed carbon dioxide (CO2) laser.
  • Characterization of transverse modes through equivalent geometric parameterization.

    • Main Results:

    • Demonstrated a direct correlation between equivalent geometric parameters and transverse mode characteristics.
    • Successfully derived information about transverse modes by analyzing cavity geometry.
    • Observed and explained the transverse-mode selective properties introduced by the interferometers.

    Conclusions:

    • Equivalent geometric parameters provide a powerful tool for understanding transverse modes in laser cavities with reflective multipass interferometers.
    • The study offers insights into designing lasers with specific transverse mode profiles.
    • This work contributes to the fundamental understanding and practical application of advanced optical resonator designs.