Analysis by the simulation of the character of reflection of the Fiber Bragg Grating sensor

IR HANDLE Web Site

Bibliographic Information

Other Title
  • ファイバグレーティングセンサ反射特性のシミュレーションによる解析
  • ファイバ グレーティング センサ ハンシャ トクセイ ノ シミュレーション ニ ヨル カイセキ

Search this article

Abstract

Abstract Refractive indices of silica glass are well known to change when ultra violet light is irradiated. With the photo-refractive effect, regions with different refractive indices are generated in an optical fiber. Fiber Bragg Grating (FBG) that has a periodic structure of different refractive indices shows a sharp reflection spectrum at a wavelength. The center wavelength, width, depth and sub peaks of the reflection spectrum depend on the periodicity, index difference, and index distribution of the structure. However, it is considerably difficult to measure the indices of the structure, because the size is as small as an order of optical wavelength used. I simulate the reflection spectra by changing the length and intensity distribution within the laser beam and index change. By comparing the simulated spectra with there measured, I have found that the laser beam has Gaussian-type intensity distribution and that the spectra depend on the length and index change distribution. On the basis of the simulation, you can obtain the laser parameters for fabricating a desirable FGB.

Journal

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top