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Propagation of Waves

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When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...

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Parallel Resonance

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Related Experiment Video

Updated: Jun 19, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Published on: November 30, 2012

Propagation effects in variable-reflectivity resonators.

E Mottay, E Durand, E Audouard

|October 2, 2009

Summary

This summary is machine-generated.

A numerical model predicts solid-state variable-reflectivity resonator beam profiles, considering diffraction and energy depletion. Experimental results show intermediate field beam profiles are highly sensitive to residual resonator diffraction effects.

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Area of Science:

Optics and Photonics
Laser Physics

Background:

Solid-state lasers with variable-reflectivity mirrors are crucial for various applications.
Understanding beam profile formation is essential for laser design and performance optimization.

Purpose of the Study:

To develop a numerical model for predicting the beam profile of solid-state variable-reflectivity resonators.
To experimentally investigate the influence of propagation effects and diffraction on beam profiles.

Main Methods:

A numerical model was developed incorporating diffraction, gain saturation, and stored energy depletion.
Experimental analysis focused on propagation effects in the intermediate field.

Main Results:

The numerical model successfully predicts resonator beam profiles.
Experimental data revealed extreme sensitivity of the intermediate field beam profile to residual diffraction within the resonator.

Conclusions:

Numerical modeling provides a robust method for predicting laser beam profiles in variable-reflectivity resonators.
Minimizing residual diffraction is critical for achieving stable and predictable beam profiles in the intermediate field.