(The characteristic of chirped fiber Bragg grating on dispersion compensation
Summary-In the fiber communication system, three main elements influencing the fiber communication development to high-speed are fiber loss, non-linearity and dispersion. Since EDFA and Raman fiber amplifier were used, the problem of loss and non-linearity have been basically solved. Therefore, the main bottleneck of system capacity and transmitting distance focus on dispersion. The available method of dispersion compensation for the current fiber are limited by big loss, low dispersion, easiness of non-linearity and dismatch of dispersion slope. In this paper, the coupled mode theory of fiber Bragg grating (FBG) is analyzed, and the fabrication course of FBG is explored and optimized. The FBGs can be made by double lens and scanning stage with phase mask, respectively. Meanw免费论文网 【http://www.51lunwen.net】hile, in order to study the characteristics of dispersion compensation of chirp FBG, the biggest transmitting distance of pulse duration reverted to the original one is analyzed, and the situations of apodization of pulse and the evolvement in single mode fiber after the reflection of the non-apodization of FBG is simulated.
Keywords-Fiber Bragg grating (FBG), Dispersion compensating, Effective index, Apodized chirp fiber Bragg grating .
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