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Related Concept Videos

Modes of Standing Waves - I01:03

Modes of Standing Waves - I

A close look at earthquakes provides evidence for the conditions appropriate for resonance, standing waves, and constructive and destructive interference. A building may vibrate for several seconds with a driving frequency matching the building's natural frequency of vibration; this produces a resonance that results in one building collapsing while the neighboring buildings do not. Often, buildings of a certain height are devastated, while other taller buildings remain intact. This phenomenon...
Modes of Standing Waves: II01:04

Modes of Standing Waves: II

The starting point for expressing the modes of standing waves is understanding the boundary conditions that the waves must follow. The boundary conditions are derived from the physical understanding of how the standing waves are sustained, that is, how the vibrating particles of the medium behave at the boundaries imposed on them.
For a tube open at one end and closed at the other filled with air, the modes are such that there is always an antinode at the open end and a node at the closed end.
What is a Mode?01:07

What is a Mode?

The mode is one of the commonly used measures of a central tendency. It is defined as the most frequent value in a data set.
There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times.
A data set with two modes is called bimodal. For example,...
Plastic Deformations of Members with a Single Plane of Symmetry01:21

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When a structural member undergoes plastic deformation due to bending, it is crucial to understand the position of the neutral axis and the stress distribution. This member, characterized by a single plane of symmetry, exhibits a uniform stress distribution, with negative stress above the neutral axis and positive stress below. Notably, the neutral axis does not align with the centroid of the cross-section. This misalignment is typical in cases where the cross-section is not rectangular or...
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Scientists identified the plasma membrane in the 1890s and its principal chemical components (lipids and proteins) by 1915. The model for plasma membrane structure, proposed in 1935 by Hugh Davson and James Danielli, was the first model to be widely accepted in the scientific community. The model was based on the plasma membrane's "railroad track" appearance in early electron micrographs. Davson and Danielli theorized that the plasma membrane's structure resembled a sandwich with the analogy of...
The Fluid Mosaic Model01:34

The Fluid Mosaic Model

The fluid mosaic model was first proposed as a visual representation of research observations. The model comprises the composition and dynamics of membranes and serves as a foundation for future membrane-related studies. The model depicts the structure of the plasma membrane with a variety of components, which include phospholipids, proteins, and carbohydrates. These integral molecules are loosely bound, defining the cell’s border and providing fluidity for optimal function.

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Updated: May 8, 2026

Measurement of Chladni Mode Shapes with an Optical Lever Method
04:39

Measurement of Chladni Mode Shapes with an Optical Lever Method

Published on: June 5, 2020

Patterned flattened modes.

Michael J Messerly1, Paul H Pax, Jay W Dawson

  • 1Lawrence Livermore National Laboratory, Livermore, California 94551, USA. messerly2@LLNL.gov

Optics Letters
|August 31, 2013
PubMed
Summary
This summary is machine-generated.

Patterning field-flattened optical fibers allows for arbitrary positioning of strands within a shell. This technique enhances bend performance and offers a new design tool for advanced laser and high-power fiber applications.

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Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Field-flattened optical fibers offer unique light-guiding properties.
  • Controlling mode characteristics is crucial for advanced fiber applications.

Purpose of the Study:

  • To investigate the impact of patterning on field-flattened optical fiber modes.
  • To explore the potential of patterned fibers for improved performance.

Main Methods:

  • Introducing and positioning field-flattened strands within a field-flattened shell.
  • Analyzing the optical properties and mode characteristics of the patterned structures.

Main Results:

  • Patterning creates new, flattened modes without altering the effective index or flatness of the primary mode.
  • The characteristics of other modes are modified by patterning.
  • Significant improvement in the bend performance of the flattened mode was observed.

Conclusions:

  • Patterning is a viable method for designing field-flattened optical fibers.
  • This technique offers a novel waveguide design tool for enhanced performance.
  • Potential applications include higher-power transport and laser fibers.