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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

Published on: December 22, 2015

Bidirectional measurement for Brillouin optical correlation domain analysis.

Ji Ho Jeong¹, Kwanil Lee, Kwang Yong Song

¹Center for Opto-Electronic Convergence Systems, Korea Institute of Science and Technology (KIST), Seoul, South Korea.

|May 9, 2012

Summary

We developed a new bidirectional measurement for Brillouin optical correlation domain analysis. This method enhances performance by doubling the speed and range of distributed measurements in optical fibers.

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Area of Science:

Optics and Photonics
Fiber Optic Sensing

Background:

Brillouin optical correlation domain analysis (BOCDA) is a technique for distributed sensing in optical fibers.
Current BOCDA methods face limitations in measurement speed and range.

Purpose of the Study:

To enhance the performance of Brillouin optical correlation domain analysis.
To introduce a novel and simple bidirectional measurement technique.

Main Methods:

Simultaneous and independent analysis of Brillouin gain and loss spectra.
Application of midpoint attenuation in the fiber under test.
Utilizing two adjacent correlation peaks for bidirectional analysis.

Main Results:

Demonstrated a bidirectional measurement for BOCDA.
Achieved a doubling of both measurement speed and range.
Successfully analyzed Brillouin gain and loss spectra independently.

Conclusions:

The proposed bidirectional measurement significantly enhances BOCDA performance.
This technique offers a simple and effective approach for distributed fiber sensing.