| Presentation | 2008-01-25 Generation of Spiral Rotational Modes due to Evanescent Coupling between Two Circular Optical Fiber Arrays Hiroyuki YOSHIDA, Noriaki TSUKADA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We investigate coupling dynamics between two circular optical fiber arrays by use of the discrete coupled wave equations. The calculations are performed with the periodic boundary phase conditions (one round accumulation phase of the arrays is to be 2π×integers). The numerical results show that when the relative phase difference between two arrays is given by 0, 2π, and 2πm, a stationary mode, a single spiral rotational mode, and a m fold spiral rotational mode are induced, respectively. Furthermore, it is shown that the rotational direction of the spiral modes depends on the coupling strength between two fiber arrays, the rotational velocity of the spiral modes depends on the nonlinear coefficient, and the conversion from the stationary mode to the rotational mode occurs due to the nonlinearity. The phenomena shown in this report give an optical beam steering technique and must be useful to fabricate optical divider and optical combiner. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Optical Fiber / Evanescent Coupling / Circular Fiber Arrays / Discrete Coupled Wave Equation / Nonlinear Coefficient |
| Paper # | OFT2007-56 |
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| Conference Information | |
| Committee | OFT |
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| Conference Date | 2008/1/17(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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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) | Generation of Spiral Rotational Modes due to Evanescent Coupling between Two Circular Optical Fiber Arrays |
| Sub Title (in English) | |
| Keyword(1) | Optical Fiber |
| Keyword(2) | Evanescent Coupling |
| Keyword(3) | Circular Fiber Arrays |
| Keyword(4) | Discrete Coupled Wave Equation |
| Keyword(5) | Nonlinear Coefficient |
| 1st Author's Name | Hiroyuki YOSHIDA |
| 1st Author's Affiliation | Faculty of Engineering, Hiroshima Institute of Technology /() |
| 2nd Author's Name | Noriaki TSUKADA |
| 2nd Author's Affiliation | |
| Date | 2008-01-25 |
| Paper # | OFT2007-56 |
| Volume (vol) | vol.107 |
| Number (no) | 451 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |