Patent ID: 6980288
Filing Date: 2005-12-27
Classification: G01M

Abstract:
1. An optical network analyzer for measuring an optical characteristic of an object to be measured, comprising: a light source for generating a first optical signal; a first demultiplexer for demultiplexing the first optical signal and for outputting a second optical signal and a third optical signal; a first reference signal generating section for generating a first reference signal; and a frequency converter for converting the frequency of the third optical signal based on the first reference signal; a first multiplexer for multiplexing the second optical signal which has been transmitted through the object to be measured, and the third optical signal having a frequency different from the second optical signal, and for outputting a fourth optical signal; a first photoelectrical converter for converting the fourth optical signal into a first electric signal; and a phase measurement block for comparing phases of the first electric signal and the first reference signal.