| 5 | Analysis of coupling from core mode to counter-propagating radiation modes in tilted fiber Bragg gratings显示文摘Radiation-mode coupling is stronger and more efficient in tilted fiber Bragg gratings than in other fiber gratings; it has good advantage in such fields as optical communication and optical sensors. A simplified coupled-mode theory (CMT) approach is proposed for what we believe to be the first time, whose validity is demonstrated by comparing its simulation results with that of the complete CMT equations. With the simplified CMT approach, a theoretical spectral analysis of coupling from core mode to counter-propagating radiation modes in reflective tilted fiber Bragg gratings is presented. The influence of grating length, refractive index modulation amplitude and tilt angle is exhaustively investigated on the transmission spectrum characteristics. The different dependences between s-polarized and p-polarized radiation-mode coupling on grating tilt angle are discussed, and the coupling strength of 45 -tilted gratings shows the greatest polarization dependence with the limitation of backward-propagating radiation-mode coupling. | LU ShaoHua 1,2 , XU Ou 1,2 , FENG SuChun 1,2 , DONG XiaoWei 1,2 , PEI Li 1,2 & JIAN ShuiSheng 1,2 1 Key Laboratory of All Optical Network & Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing 100044, China 2 Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China | 2010 | Science China(Information Sciences)2010，53，5： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员