Modulator device based on optical fiber with core on inner wall
| Autor: | 郑瑶 Zheng Yao, 杨兴华 Yang Xing-hua, 赵恩铭 Zhao En-ming, 刘岩鑫 Liu Yan-xin, 佟成国 Tong Cheng-guo, 苑立波 Yuan Li-bo |
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| Rok vydání: | 2013 |
| Předmět: |
Multi-mode optical fiber
Materials science business.industry Physics::Optics Polarization-maintaining optical fiber Graded-index fiber Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Optics Fiber optic sensor Dispersion-shifted fiber Plastic optical fiber business Hard-clad silica optical fiber Photonic-crystal fiber |
| Zdroj: | Optics and Precision Engineering. 21:884-888 |
| ISSN: | 1004-924X |
| Popis: | A fiber integrated modulator is proposed based on a new kind of optical fiber with a fiber core on the inner wall.This optical fiber has a pore structure and its core is suspended on the inner wall of the pore.The magnetic fluid containing super paramagnetic Fe3O4 nanoparticles is synthesized,then it is encapsulated in the hollow optical fiber through molten connecting with a multimode optical fiber and used as the cladding of the fiber core.By an evanescent field,the magnetic fluid generates absorption effect on the light and its intensity is controlled by an external magnetic field,so that the light modulation is implemented.Moreover,the light at a wavelength of 632.8 nm is coupled in and out of the modulating element by tapering the coupling point.The experimental results show that only 2.0 × 10-2 μL of the magnetic fluid in the system can significantly impact the optical attenuation under different magnetic field strengths.When the magnetic field strength is 38 914 A/m,the saturation modulation depth is 43 %,and the system response time is below 120 ms.The system can also be used in light switches,optical fiber filters and magnetic sensors. |
| Databáze: | OpenAIRE |
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