【摘 要】
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A new class of fiber grating with only cladding index modulation is presented and analyzed theoretically. The calculation of the modes involved in this paper is based on a model of three-layer step-index fiber geometry. The transmission of a mode guided b
【机 构】
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AdvancedPhotonicsCenter,DepartmentofElectronicEngineering,SoutheastUniversity,Nanjing210096
【出 处】
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ChineseOpticsLetters
论文部分内容阅读
A new class of fiber grating with only cladding index modulation is presented and analyzed theoretically. The calculation of the modes involved in this paper is based on a model of three-layer step-index fiber geometry. The transmission of a mode guided by the core through a cladding index modulated grating when evanescent field coupling occurs is analyzed with couple-mode theory. Lower attenuation and flexible spectral characteristics can be obtained in comparison with traditional fiber core index modulated grating.
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