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Characterization of Anisotropic Leaky Mode Modulators for Holovideo

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Published on: March 19, 2016

The influence of mode coupling on waveguide invariant.

Wenhua Song¹, Ning Wang¹, Dazhi Gao¹

¹College of Information Science and Engineering, Ocean University of China, Qingdao 266100, China.

The Journal of the Acoustical Society of America

|November 3, 2017

Summary

Internal solitary waves (ISWs) create complex acoustic patterns by affecting the waveguide invariant (β). The position of ISWs, not their amplitude or scale, significantly impacts peak values of β, enabling ISW position monitoring.

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Area of Science:

Underwater acoustics
Oceanography
Wave propagation

Background:

The waveguide invariant (β) is crucial for understanding acoustic propagation in range-independent or adiabatically varying environments.
Limited research addresses mode coupling effects on β, particularly in dynamic underwater scenarios.

Purpose of the Study:

To investigate the impact of internal solitary waves (ISWs) on the waveguide invariant (β).
To analyze how mode coupling induced by ISWs influences acoustic interference patterns and β distribution.
To determine the sensitivity of β to ISW parameters for potential monitoring applications.

Main Methods:

Analysis of acoustic interference intensity in the presence of ISWs.
Investigating the relationship between mode coupling position and the resulting striation slope and β values.
Assessing the influence of ISW amplitude, horizontal scale, and position on the energy and values of β peaks.

Main Results:

ISWs induce mode coupling, introducing additional components to acoustic interference intensity.
The striation slope and β values of these components depend on acoustic modal dispersion and the location of mode coupling.
ISW position is identified as the primary factor influencing the peak values of β, while amplitude and scale affect peak energy.

Conclusions:

Mode coupling caused by ISWs complicates acoustic interference patterns and leads to multiple peaks in β distribution.
The sensitivity of β peak values to ISW position offers a viable method for monitoring internal solitary wave locations.