| 摘要 |
PROBLEM TO BE SOLVED: To provide a wavelength-selective switch that corrects port dependency of center wavelength deviation at a deflection part and is capable of improving communication quality.SOLUTION: A wavelength-selective switch comprises: at least one input port 10a; a dispersion part 15 for dispersing wavelength-multiplexed input light to be input from the input port 10a on wavelength-by-wavelength light; a light collection element 16 for collecting the wavelength-by-wavelength light to be dispersed by the dispersion part 15; a deflection part 17 where multiple deflection elements 18 for respectively deflecting the wavelength-by-wavelength light to be collected by the light collection element 16 are arranged; at least one output port 10d for outputting the wavelength-by-wavelength light deflected by the deflection part 17, as output light; and a correction element 20 that is arranged in an optical path of the input light to be input from the input port 10a and corrects an incident position shift of the wavelength-by-wavelength light relative to the deflection elements 18 that is caused in an arrangement direction of the deflection elements 18 on the basis of a location of the input port 10a. |
