Modulation instability-induced visibility fading in phase-sensitive OTDR
Phase-sensitive optical time domain reflectometry (ΦOTDR) is a simple and effective tool that allows the distributed monitoring of vibrations along single-mode fibers. In this letter we study the effects of modulation instability (MI) in long-range ΦOTDR over conventional optical fibers. We demonstr...
| Authors: | , , , , , |
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| Format: | article |
| Publication Date: | 2013 |
| Country: | España |
| Institution: | Universidad de Alcalá (UAH) |
| Repository: | e_Buah Biblioteca Digital Universidad de Alcalá |
| Language: | English |
| OAI Identifier: | oai:ebuah.uah.es:10017/27541 |
| Online Access: | http://hdl.handle.net/10017/27541 https://dx.doi.org/10.1117/12.2026062 |
| Access Level: | Open access |
| Keyword: | Modulation instability Phase-sensitive OTDR Distributed measurements Optical fiber sensors Ciencias tecnológicas Electrónica Technology Electronics |
| Summary: | Phase-sensitive optical time domain reflectometry (ΦOTDR) is a simple and effective tool that allows the distributed monitoring of vibrations along single-mode fibers. In this letter we study the effects of modulation instability (MI) in long-range ΦOTDR over conventional optical fibers. We demonstrate both theoretically and experimentally that MI can induce a position-dependent signal fading which leads to a nearly complete visibility loss in the interference signal recorded at certain positions and therefore to a sensitivity loss at these positions. While this effect is detrimental in the context of distributed vibration analysis using ΦOTDR, we also believe that the technique provides a clear and insightful way to evidence the Fermi-Pasta-Ulam (FPU) recurrence associated to the MI process. |
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