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Propagation of Waves

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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Updated: Jun 12, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

Distributed fiber optic sensing based on counterpropagating waves.

T Valis, R D Turner, R M Measures

|June 18, 2010

Summary

This summary is machine-generated.

This study introduces a method using backward stimulated Raman scattering to measure optical fiber birefringence. The technique analyzes power exchange between light pulses to assess strain fields.

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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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Last Updated: Jun 12, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

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Published on: January 7, 2019

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Area of Science:

Optical Physics
Materials Science

Background:

Birefringence in optical fibers affects signal transmission.
Accurate measurement of birefringence is crucial for fiber optic applications.
Existing methods may lack spatial or temporal resolution.

Purpose of the Study:

To develop a technique for spatially and temporally resolved birefringence measurement in single-mode optical fibers.
To utilize backward stimulated Raman scattering for this measurement.
To propose a novel normalization procedure for improved accuracy.

Main Methods:

Employing backward stimulated Raman scattering (SRS) with counterpropagating light pulses.
Determining birefringence magnitude from optical power exchange between pump and signal pulses.
Implementing a novel normalization procedure to mitigate uncertainties.

Main Results:

Demonstrated the capability to ascertain spatially and temporally resolved birefringence.
Quantified birefringence based on polarization-dependent optical power exchange.
Validated a normalization technique that simplifies the analysis.

Conclusions:

Backward SRS is an effective method for measuring fiber optic birefringence.
The proposed technique allows for precise, localized strain field evaluation.
This method offers advancements in optical fiber characterization.