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Standing Waves in a Cavity

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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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Updated: May 11, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

High-performance cavity-phase matching by pump reflection.

H B Lin¹, S F Li, Y W Sun

¹OPERA–Photonique, CP 194/5, Université Libre de Bruxelles, av FD Roosevelt 50, Brussels B-1050, Belgium. lolislag@ulb.ac.be

|June 1, 2013

Summary

This summary is machine-generated.

Researchers achieved 41% conversion efficiency for cavity-phase matching using a novel pump beam reflection technique in KTiOPO4 crystals. This method significantly improves upon previous limitations, offering a promising alternative to quasi-phase-matching materials.

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Last Updated: May 11, 2026

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Area of Science:

Nonlinear optics
Laser physics
Materials science

Background:

Cavity-phase matching (CPM) is an established technique for enhancing nonlinear optical processes.
Previous experimental realizations of CPM were limited to a maximum conversion efficiency of 20%.

Purpose of the Study:

To overcome the efficiency limitations of existing cavity-phase matching methods.
To achieve higher conversion efficiencies in nonlinear optical devices.

Main Methods:

Implemented a novel approach by reflecting the pump beam at the end surface of a KTiOPO4 crystal within the cavity.
Utilized cavity-phase matching (CPM) in conjunction with the modified pump beam path.

Main Results:

Achieved a peak conversion efficiency of 41%.
Demonstrated a slope efficiency of 48.5%.
The novel method significantly surpasses the previously reported 20% efficiency limit for CPM.

Conclusions:

The developed cavity-phase matching technique offers a substantial improvement in conversion efficiency.
This high-performance device presents a viable and promising alternative to traditional quasi-phase-matching materials for nonlinear optical applications.