https://scholars.lib.ntu.edu.tw/handle/123456789/155916
標題: | Wavelength Shifts of Cladding-Mode Resonance in Corrugated Long-Period Fiber Gratings under Torsion | 作者: | Ivanov, Oleg V. LON A. WANG |
公開日期: | 2003 | 卷: | 42 | 期: | 13 | 起(迄)頁: | 2264-2272 | 來源出版物: | Applied Optics | 摘要: | A finite deformation theory of elasticity and a theory of nonlinear photoelasticity are applied to describe the wavelength shifts of cladding-mode resonance in corrugated long-period fiber gratings under torsion. The deformation of fiber is found by use of the Murnaghan model of a solid elastic body. The quadratic photoelastic effect that is proportional to the second-order displacement gradient is investigated and compared with the classical photoelastic effect. The electromagnetic field in the twisted corrugated structure is presented as a superposition of circularly polarized modes of the etched fiber section. The wavelength shift is found to be proportional to the square of the twist angle. As predicted by our theory, a wavelength shift of the same nature has been found in a conventionally photoinduced long-period fiber grating. © 2003 Optical Society of America. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/148199 https://www.scopus.com/inward/record.uri?eid=2-s2.0-0041471101&doi=10.1364%2fAO.42.002264&partnerID=40&md5=b40a278133024a5c80122ce43699cd5c |
ISSN: | 1559128X | DOI: | 10.1364/AO.42.002264 | SDG/關鍵字: | Deformation; Elasticity; Electromagnetic field effects; Etching; Photoelasticity; Resonance; Torsional stress; Long period fiber gratings (LPFG); Diffraction gratings |
顯示於: | 電機工程學系 |
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