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http://dx.doi.org/10.3807/KJOP.2006.17.1.018

Transmission Characteristics of Multiply Cascaded Phase-shifted Long-period Fiber Gratings and their Dependence on Initial Coupling Strength  

Kim, Min-Sung (Dept. of Information & Communications Engineering TongMyong Universiy of Information Technology)
Han, Young-Geun (Photonics Research Center Korea Institute of Science and Technology(KIST))
Publication Information
Korean Journal of Optics and Photonics / v.17, no.1, 2006 , pp. 18-22 More about this Journal
Abstract
The transmission characteristics of multiply cascaded phase-shifted long-period fiber gratings(LPFGs) were investigated theo-retically and experimentally. Their passband can be changed by increasing the number of p-shifted LPFGs. When two p-shifted LPFGs with different grating lengths are cascaded in series, the bandwidth of the rejection band and passband can be controlled by the pristine characteristics of two gratings. We also investigate the transmission characteristics of phase-shifted LPFG by exposing the half of LPFG region to UV laser. The transmission characteristics strongly depend on the initial coupling strength of the LPFG.
Keywords
Long-period fiber gratings; Phase-shifted long-period fiber gratings;
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