| Presentation | 2021-10-15 Multimodal interference sensor with dynamically controllable active area Heeyoung Lee, Chenxu Zhao, Takaki Kiyozumi, Kentaro Nakamura, Yosuke Mizuno, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Strain and temperature sensing based on multimodal interference in optical fibers has recently been gathering tremendous attention. One of its simple and cost-efficient implementations is based on what we call a single-mode-multimode-single-mode (SMS) structure, where a multimode fiber (MMF) is sandwiched by two single-mode fibers (SMFs). It is, however, difficult to control the length of an active area (i.e., a fiber section with strain/temperature sensitivity) in SMS-based sensors, because the MMF length cannot be changed. To solve this problem and widen the application field, in this work, we develop a new configuration of a modal-interference-based temperature sensor by connecting two SMFs with different cut-off wavelengths and by applying a load to one of the SMFs. The fiber section between the connector and the load operates as the active area, which is dynamically controllable by changing the load position. First, we observe a transmitted light spectrum and verify the appearance of spectral patterns unique to modal interference. Subsequently, we investigate the dependence of the wavelength interval (of the interference patters) on the active area length. The interval is shown to be inversely proportional to the active length, proving the operating principle of this sensor. Finally, we investigate the temperature dependence of the interference patterns (when the active length is 0.3 m) and show that this scheme is potentially applicable to temperature sensing. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Optical fiber sensors / Modal interference / Single-mode-multimode-single-mode (SMS) structure / Cut-off wavelength / Temperature sensing |
| Paper # | OFT2021-46 |
| Date of Issue | 2021-10-07 (OFT) |
| Conference Information | |
| Committee | OFT |
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| Conference Date | 2021/10/14(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Yuji Matsuura(Tohoku Univ.) |
| Vice Chair | |
| Secretary | (NTT) |
| Assistant | Yukihiro Goto(NTT) / Minoru Takahashi(Fujikura) |
| Paper Information | |
| Registration To | Technical Committee on Optical Fiber Technology |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Multimodal interference sensor with dynamically controllable active area |
| Sub Title (in English) | |
| Keyword(1) | Optical fiber sensors |
| Keyword(2) | Modal interference |
| Keyword(3) | Single-mode-multimode-single-mode (SMS) structure |
| Keyword(4) | Cut-off wavelength |
| Keyword(5) | Temperature sensing |
| 1st Author's Name | Heeyoung Lee |
| 1st Author's Affiliation | Shibaura Institute of Technology(SIT) |
| 2nd Author's Name | Chenxu Zhao |
| 2nd Author's Affiliation | Shibaura Institute of Technology(SIT) |
| 3rd Author's Name | Takaki Kiyozumi |
| 3rd Author's Affiliation | Yokohama National University(YNU) |
| 4th Author's Name | Kentaro Nakamura |
| 4th Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| 5th Author's Name | Yosuke Mizuno |
| 5th Author's Affiliation | Yokohama National University(YNU) |
| Date | 2021-10-15 |
| Paper # | OFT2021-46 |
| Volume (vol) | vol.121 |
| Number (no) | OFT-199 |
| Page | pp.pp.97-100(OFT), |
| #Pages | 4 |
| Date of Issue | 2021-10-07 (OFT) |