| Presentation | 2005-10-14 A novel fabrication method of super structure fiber Bragg gratings based on the structure identification using least mean square algorithm Kenji OSADA, Masanori HANAWA, Koichi TODA, Kazuhiko NAKAMURA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A reflection spectrum of a superstructure fiber Bragg gratings (FBGs) is strongly dependent on the phase differences between the reflected lights from sub FBGs. To obtain the desired phase differences, it is neccesary to control the FBG spacing very precisely in several tens nano meters. From this reason, it is difficult to make the desired superstructure FBGs. In this report, a novel method to identify the structure of a superstructure FBG using the least mean square algorithm is proposed. Moreover a novel method to make a superstructure FBG using the proposed identification method is also reported. In this method, the phase differences of the fabricated superstructure FBG is identified, then the number of UV pulses to correct them to the desired values is calculated. Finally the reflactive indices at the gaps between the sub FBGs are corrected in a batch process. By these methods the requirements to the accuracy of the movable stage to be used in the fabrication process is drastically relaxed and it makes easy to make the desired superstructure FBGs. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | super structure fiber Bragg grationgs / phase difference / structure identification method |
| Paper # | OFT2005-29 |
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| Conference Information | |
| Committee | OFT |
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| Conference Date | 2005/10/7(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Vice Chair | |
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| Paper Information | |
| Registration To | Optical Fiber Technology (OFT) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A novel fabrication method of super structure fiber Bragg gratings based on the structure identification using least mean square algorithm |
| Sub Title (in English) | |
| Keyword(1) | super structure fiber Bragg grationgs |
| Keyword(2) | phase difference |
| Keyword(3) | structure identification method |
| 1st Author's Name | Kenji OSADA |
| 1st Author's Affiliation | Graduate School of Medical and Engineering, Science Department of Education, University of Yamanashi() |
| 2nd Author's Name | Masanori HANAWA |
| 2nd Author's Affiliation | Graduate School of Medical and Engineering, Science Department of Research, University of Yamanashi |
| 3rd Author's Name | Koichi TODA |
| 3rd Author's Affiliation | Graduate School of Medical and Engineering, Science Department of Education, University of Yamanashi |
| 4th Author's Name | Kazuhiko NAKAMURA |
| 4th Author's Affiliation | Graduate School of Medical and Engineering, Science Department of Research, University of Yamanashi |
| Date | 2005-10-14 |
| Paper # | OFT2005-29 |
| Volume (vol) | vol.105 |
| Number (no) | 333 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |