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Analysis of coupling from core mode to counter-propagating radiation modes in tilted fiber Bragg gratings

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Abstract

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.

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Authors and Affiliations

  1. Key Laboratory of All Optical Network & Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing, 100044, China

    ShaoHua Lu, Ou Xu, SuChun Feng, XiaoWei Dong, Li Pei & ShuiSheng Jian

  2. Institute of Lightwave Technology, Beijing Jiaotong University, Beijing, 100044, China

    ShaoHua Lu, Ou Xu, SuChun Feng, XiaoWei Dong, Li Pei & ShuiSheng Jian

Authors
  1. ShaoHua Lu
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  2. Ou Xu
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  3. SuChun Feng
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  4. XiaoWei Dong
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  5. Li Pei
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  6. ShuiSheng Jian
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Correspondence to ShaoHua Lu.

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Lu, S., Xu, O., Feng, S. et al. Analysis of coupling from core mode to counter-propagating radiation modes in tilted fiber Bragg gratings. Sci. China Inf. Sci. 53, 1078–1088 (2010). https://doi.org/10.1007/s11432-010-0093-x

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  • DOI: https://doi.org/10.1007/s11432-010-0093-x

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