2009 Fiscal Year Final Research Report
A Technique to Produce Negative Brillouin Gain and Its Application to Improve BOTDA Performance
| Project/Area Number |
19560428
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Measurement engineering
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| Research Institution | Shibaura Institute of Technology |
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Principal Investigator |
HORIGUCHI Tsuneo Shibaura Institute of Technology, 工学部, 教授 (70348902)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 計測工学 / スマート情報センサシステム / リモートセンシング / 応用光学 / 光ファイバセンサ / 分布型センサ / ひずみセンサ / ブリルアン増幅 |
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| Research Abstract |
A technique is investigated to improve the performance of BOTDA which measures distributed strain along an optical fiber based on strain dependence of Brillouin frequency shift. First pump light is generated to produce negative Brillouin gain for the first time. Second pump light is phase-modulated with Golay code to utilize the negative gain as well as conventional positive one. Two methods are proposed for the modulation. It is clarified that both methods can improve signal to noise ratio for BOTDA.
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