| 摘要 |
PROBLEM TO BE SOLVED: To provide an OSNR measurement device capable of accurately measuring OSNR of an optical signal during operation with a simple and economical configuration.SOLUTION: An OSNR measurement device 1 includes: a wavelength-selection section 12 having a variable passing band that selectively extracts an optical component corresponding to an optical signal wavelength to be measured from a measured light L incident into an input port 11 and conveys the optical component to a delay interference section 14; an optical detection section 15 for detecting power of delay interference light output from the delay interference section; and an OSNR calculating section 16 for calculating the OSNR at the optical signal wavelength to be measured based on a band width of the passing band of the wavelength-selection section and a detection result of the optical detection section. |
