电子论文-Return loss measurement of fiber optic components.pdf

Return loss measurement of fiber optic components Solutions Brief 815-1 How the HP 8153A/HP 81534A measure return loss of fiber optic components? The significance of return loss If a system component, such as a In fiber optics, it is common to The introduction of new connector, reflects too much light show optical signals, such as back technologies in optical back to the transmitter, the reflections on a logarithmic scale. transmission systems has created modulation characteristics and the The ratio of the input power level the need to adapt measurement spectrum of the laser change. High- and the power reflected by a techniques for component speed systems usually contain component under test yields the characterization. many components, hence there is a return loss. High return loss values real danger that multiple reflections characterize components with In particular, this has been the case will lead to signal distortion and minimum backreflections. These since the introduction of single- consequently to system failure. are most suitable for high speed mode fiber to optical high-speed transmission systems. Thus, to transmission systems. Special In order to ensure the reliable optimize the characteristics of lasers with narrow linewidth have performance of a system it is vital optical components it is necessary to be used for the t