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Wave Parameters01:10

Wave Parameters

The simplest mechanical waves are associated with simple harmonic motion and repeat themselves for several cycles. These simple harmonic waves can be modeled using a combination of sine and cosine functions. Consider a simplified surface water wave that moves across the water's surface. Unlike complex ocean waves, in surface water waves, water moves vertically, oscillating up and down, whereas the disturbance of the wave moves horizontally through the medium. If a seagull is floating on the...
Propagation of Waves01:07

Propagation of Waves

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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Related Experiment Video

Updated: Jun 17, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Recording parameters of spatially modulated coherent wavefronts.

A A Friesem1, A Kozma, G F Adams

  • 1Radar and Optics Laboratory, Willow Run Laboratories of The University of Michigan's Institute ofScience and Technology, Ann Arbor, Michigan 48107, USA.

Applied Optics
|January 9, 2010
PubMed
Summary

This study optimizes hologram recording by analyzing key parameters like beam intensity ratio and bias level. Findings help improve holographic image quality and data storage capabilities.

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Last Updated: Jun 17, 2026

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Area of Science:

  • Optics and Photonics
  • Holography
  • Materials Science

Background:

  • Holographic data storage and imaging rely on precise recording of interference patterns.
  • Understanding the influence of various parameters is crucial for optimizing hologram quality.

Purpose of the Study:

  • To investigate and determine optimal parameters for recording spatially modulated coherent light for hologram construction.
  • To identify the ideal bias level and signal-to-reference beam intensity ratio for interference pattern recording.

Main Methods:

  • Experimental recording of interference patterns using He-Ne (6328 Å) and Argon (4880 Å, 5145 Å) lasers on high-resolution film.
  • Systematic variation of bias level, percent modulation, spatial frequency, and beam intensity ratios.
  • Analysis of film amplitude transmittance versus exposure characteristics.

Main Results:

  • Determined the optimum bias level for hologram recording based on film characteristics.
  • Identified the optimal ratio of signal beam to reference beam intensity for high-fidelity interference patterns.
  • Established methods for determining the modulation transfer function of recording media.

Conclusions:

  • Optimal recording parameters significantly enhance hologram fidelity and data integrity.
  • The study provides a framework for improving holographic recording techniques.
  • Findings contribute to advancements in optical data storage and imaging applications.