Metal-coated long period grating for detection of corrosion

5 November 2005 Metal-coated long period gratings for detection of corrosion

Dongsheng Tu, Yanbiao Liao, Ming Zhang

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Proceedings Volume 5998, Sensors for Harsh Environments II; 59980G (2005) https://doi.org/10.1117/12.630140
Event: Optics East 2005, 2005, Boston, MA, United States

Abstract

In this paper, the long period grating (LPG) with a metal outer clad is analyzed. The transfer constant of core mode and cladding mode were derived from numerical method. The complex refractive index of the metal outer clad make the transfer constant to be a complex number. The imaginary part of the transfer constant is representing the loss during the wave's transmission. Theoretical analysis shows that the core mode's loss caused by metal clad is can be ignored when the radius of the clad is 62.5um. The complex refractive index make larger resonance wavelength shift than the refractive index without imaginary part.

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Dongsheng Tu, Yanbiao Liao, and Ming Zhang "Metal-coated long period gratings for detection of corrosion", Proc. SPIE 5998, Sensors for Harsh Environments II, 59980G (5 November 2005); https://doi.org/10.1117/12.630140

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