OPTICAL FIBER TESTING METHOD, APPARATUS AND PASSIVE OPTICAL NETWORK SYSTEM

摘要

Disclosed are an optical fiber testing method and apparatus thereof in the embodiments of the invention, and relate to optical communication technology field. Said optical testing method comprises: Receiving testing optical signal from optical network, and transforming the testing optical signal to testing current signal; Transimpedance amplifier uses a first working mode to receive the testing current signal and output a first testing voltage signal; Acquiring swing amplitude of the first testing voltage signal, and determining whether the swing amplitude of the first testing voltage signal meets predetermined condition; When the swing amplitude of the first testing voltage signal meets the predetermined condition, the transimpedance amplifier uses a second working mode to receive the testing current signal and output a second testing voltage signal, wherein the upper limit and the lower limit of receiving dynamic range of the transimpedance amplifier when it works at the first working mode is different with the upper limit and lower limit when it works at the second working mode. The embodiments of the invention also provide a passive optical network system.