光纖光柵元件干涉式色散特性量測技術之研究

Dispersion Measurement of Fiber Grating Using Interferometric Technique

姜禮福(Li-Fu Chiang)

指導教授 ： 黃建彰

元智大學/電機通訊學院/電機工程學系/碩士(2008年)

摘要

光纖光柵在光纖通訊及光纖感測領域有越來越廣泛的應用，光纖光柵元件的色散特性量測就愈顯重要。在本篇論文中，我們改良非平衡型邁克森干涉儀色散量測技術及理論，推衍出共光路干涉儀色散量測技術。此共光路干涉架構中參考與探測光路大部分是重疊的，光路的任何環境變化均可相互抵銷，因此干涉光譜的穩定性可大幅提升，並且又可使光纖光柵元件波長相關色散特性量測架構更趨簡單。在研究中，我們的實驗結果與光網路分析儀的量測結果做比較，得到準確性的驗證；而且我們重複量測結果差異性非常小，證明量測之重複性也非常好。

關鍵字

色散量測 ； 共光路干涉儀架構

並列摘要

Fiber Bragg gratings (FBGs) have been widely used in optical communication and optical sensing applications such that the chromatic dispersion measurement of FBGs is very important. In this thesis, we have proposed a simple measurement for characterization of FBGs using the common-path interferometric technique. We modified the un-balanced Michelson interferometer technique to develop the common-path interferometric technique by the similar Fourier-transform processing. In the common-path interferometer, the paths of the probe light and refer light are almost the same such that the environmental perturbation can be cancelled. We believe the repeatability and simplicity of this proposed technique is better than the un-balanced Michelson interferometer. We have repeatedly measured the group delay and reflection spectrum of a FBG filter. The experimental results excellently match the data measured by the optical network analyzer. Besides, the difference coming up with the result of the repeated measurement is very little which proves the repeatability is also great.

並列關鍵字

chromatic dispersion measurement ； common-path interferometric

參考文獻

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