Theoretical and experimental analysis of excessively tilted fiber gratings

Zhijun Yan; Hushan Wang; Changle Wang; Zhongyuan Sun; Guolu Yin; Kaiming Zhou; Yishan Wang; Wei Zhao; Lin Zhang

doi:10.1364/OE.24.012107

Theoretical and experimental analysis of excessively tilted fiber gratings

Zhijun Yan, Hushan Wang, Changle Wang, Zhongyuan Sun, Guolu Yin, Kaiming Zhou, Yishan Wang, Wei Zhao, Lin Zhang

Aston Institute of Photonic Technologies (AiPT)

Research output: Contribution to journal › Article › peer-review

Abstract

We have theoretically and experimentally investigated the dual-peak feature of tilted fiber gratings with excessively tilted structure (named as Ex-TFGs). We have explained the dual-peak feature by solving eigenvalue equations for TM_0m and TE_0m of a circular waveguide, in which the TE (transverse electric) and TM (transverse magnetic) core modes are coupled into TE and TM cladding modes, respectively. Meanwhile, in the experiment, we have verified that one of the dual peaks at the shorter wavelength is due to the TM mode coupling whereas the other one at the longer wavelength arises from TE mode coupling when a linearly polarized light launched into the Ex-TFG. We have also investigated the peak separation of TE and TM cladding mode for different surrounding medium refractive indexes (SRI), revealed that the dual peaks separation is decreasing as increasing of SRI, which agrees very well with the theoretical analysis results.

Original language	English
Pages (from-to)	12107-12115
Number of pages	9
Journal	Optics Express
Volume	24
Issue number	11
Early online date	25 May 2016
DOIs	https://doi.org/10.1364/OE.24.012107
Publication status	Published - 30 May 2016

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10.1364/OE.24.012107

Theoretical and experimental analysis of excessively tilted fiber gratings
©2016 Optical Society of America
Final published version, 1.71 MBLicence: Other

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title = "Theoretical and experimental analysis of excessively tilted fiber gratings",

abstract = "We have theoretically and experimentally investigated the dual-peak feature of tilted fiber gratings with excessively tilted structure (named as Ex-TFGs). We have explained the dual-peak feature by solving eigenvalue equations for TM0m and TE0m of a circular waveguide, in which the TE (transverse electric) and TM (transverse magnetic) core modes are coupled into TE and TM cladding modes, respectively. Meanwhile, in the experiment, we have verified that one of the dual peaks at the shorter wavelength is due to the TM mode coupling whereas the other one at the longer wavelength arises from TE mode coupling when a linearly polarized light launched into the Ex-TFG. We have also investigated the peak separation of TE and TM cladding mode for different surrounding medium refractive indexes (SRI), revealed that the dual peaks separation is decreasing as increasing of SRI, which agrees very well with the theoretical analysis results.",

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T1 - Theoretical and experimental analysis of excessively tilted fiber gratings

AU - Yan, Zhijun

AU - Wang, Hushan

AU - Wang, Changle

AU - Sun, Zhongyuan

AU - Yin, Guolu

AU - Zhou, Kaiming

AU - Wang, Yishan

AU - Zhao, Wei

AU - Zhang, Lin

PY - 2016/5/30

Y1 - 2016/5/30

N2 - We have theoretically and experimentally investigated the dual-peak feature of tilted fiber gratings with excessively tilted structure (named as Ex-TFGs). We have explained the dual-peak feature by solving eigenvalue equations for TM0m and TE0m of a circular waveguide, in which the TE (transverse electric) and TM (transverse magnetic) core modes are coupled into TE and TM cladding modes, respectively. Meanwhile, in the experiment, we have verified that one of the dual peaks at the shorter wavelength is due to the TM mode coupling whereas the other one at the longer wavelength arises from TE mode coupling when a linearly polarized light launched into the Ex-TFG. We have also investigated the peak separation of TE and TM cladding mode for different surrounding medium refractive indexes (SRI), revealed that the dual peaks separation is decreasing as increasing of SRI, which agrees very well with the theoretical analysis results.

AB - We have theoretically and experimentally investigated the dual-peak feature of tilted fiber gratings with excessively tilted structure (named as Ex-TFGs). We have explained the dual-peak feature by solving eigenvalue equations for TM0m and TE0m of a circular waveguide, in which the TE (transverse electric) and TM (transverse magnetic) core modes are coupled into TE and TM cladding modes, respectively. Meanwhile, in the experiment, we have verified that one of the dual peaks at the shorter wavelength is due to the TM mode coupling whereas the other one at the longer wavelength arises from TE mode coupling when a linearly polarized light launched into the Ex-TFG. We have also investigated the peak separation of TE and TM cladding mode for different surrounding medium refractive indexes (SRI), revealed that the dual peaks separation is decreasing as increasing of SRI, which agrees very well with the theoretical analysis results.

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Theoretical and experimental analysis of excessively tilted fiber gratings

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