Bragg光纤光栅用作滤波器时的输出光脉冲波形分析

对光纤光栅用作接收端光噪音滤波器进行了详细的理论分析,计算了通信系统中矩形光脉冲信号经“强”、“弱”Bragg光纤光栅滤波器后的输出光脉冲波形,同时也计算了矩形光脉冲信号经匹配光滤波器、现行光通信系统中常用F-P滤波器的输出光脉冲波形,对四种滤波器的输出光脉冲波形进行了分析和比较,并分析了输出信号在抽样判决时的码间干扰情况,从输出波形分析认为,光纤光栅用做接收端噪音滤波器比F-P滤波器具有更大的优越性.

ANALYZING OF TEMPORAL RESPONSE OF OPTICAL FIBER BRAGG GRATING FILTER

An optical fiber Bragg grating filter used in optical fiber communication system is analyzed.The goal of the filter is to improve the sensitivity of an optical receiver by optimally filtering a communication signal.In this paper the temporal response of strong and weak Bragg grating filter is analyzed.At the same time temporal response of F P filter and the temporal of matched filer is also analyzed.Then we compare the response of these four filters.It is found that the reflected pulse closely resembles the triangular shape characteristic of a perfectly matched filter.In the end the intersymbol interference of them is analyzed.