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Backreflected radiation due to a propagating fiber fuse
Kazi S Abedin1, Masataka Nakazawa, Tetsuya Miyazaki
1Photonic Network Group, National Institute of Information and Communications Technology, 4-2-1 Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan. abedin@nict.go.jp
Optics Express
|April 15, 2009
Summary
Investigating fiber fuse voids revealed low-frequency amplitude modulation in backreflected light, detectable remotely. An analytical model explained these spectral features, leading to a rapid fuse propagation termination method.
Area of Science:
- Optical Engineering
- Materials Science
- Photonics
Background:
- Fiber fuse is a phenomenon involving localized damage in optical fibers.
- Understanding light backreflection from fiber fuse voids is crucial for diagnostics and control.
- Existing methods for analyzing fiber fuse phenomena lack detailed spectral insights.
Purpose of the Study:
- To investigate the properties of backreflected light from voids in a fiber fuse.
- To develop an analytical model for spectral features of backreflected light.
- To demonstrate a novel method for rapid termination of fiber fuse propagation.
Main Methods:
- Utilized optical coherence-domain reflectometry (OCDR) on damaged fibers.
- Employed real-time monitoring of electrical (RF) and optical frequency spectrum.
- Derived an analytical expression for backreflected light during fuse propagation.
Main Results:
- Observed low-frequency broadband amplitude modulation in backreflected light at the fiber fuse interface.
- Successfully detected this modulation remotely using an RF spectrum analyzer.
- The derived analytical expression accurately explained the experimentally observed RF spectral features.
Conclusions:
- Backreflected light from fiber fuse voids exhibits unique spectral characteristics.
- Remote detection of these characteristics is feasible using RF spectrum analysis.
- A novel, rapid method for terminating fiber fuse propagation was successfully demonstrated.
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