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一、引言随着光纤制作技术和应用要求的日益提高,快速可靠地测量光纤的传输带宽也就成为迫切需要解决的问题。目前较常用的方法是:先测量光纤的脉冲响应,然后根据此响应应用经验公式估算出光纤的传输带宽。另一种测量方法是频域法,这种方法采用扫频仪或跟踪示波器来进行,从显示器上可以很快获得光纤响应的频谱曲线,然后根据通常的规定,如幅度下降
I. INTRODUCTION With the increasing demand of optical fiber making technology and application, measuring the transmission bandwidth of optical fiber fast and reliably becomes an urgent problem to be solved. Currently more commonly used method is: first measure the impulse response of the fiber, and then use the empirical formula to estimate the transmission bandwidth of the fiber based on this response. Another measurement method is the frequency domain method, this method using a swept or tracking oscilloscope to carry out from the display can quickly obtain the spectral response of the fiber optic curve, and then according to the usual provisions, such as amplitude decreased