| 摘要 |
PROBLEM TO BE SOLVED: To provide a signal light quality measuring device capable of measuring a nonlinear noise component and a noise component of natural emission light included in a signal light with a simple configuration at a low cost.SOLUTION: The signal light quality measuring device includes: a wavelength variable filter 41 to which various beams of signal light each having different power are input; a measurement section 42 that measures the light power passing through the wavelength variable filter 41; and a control section 43 that calculates the nonlinear noise component and the noise component of natural emission light which are included in the signal light based on the light power measured by the measurement section 42 at different transmission frequency on each of the signal light having power different from each other according to the transmission frequency control by the wavelength variable filter 41. |
