Patent ID: 9596526
Date: 2017-03-14
CPC Classifications: G02B,H04Q

Claim:
1. A wavelength selective switch comprising: a dispersion optical system dispersing wavelength multiplexing light obtained by multiplexing a plurality of frequency components to the plurality of frequency components by giving a dispersion angle having nonlinear frequency dependency to each of the plurality of frequency components; a light deflection element deflecting the plurality of frequency components; a condensing element condensing the plurality of frequency components on the light deflection element; and a prism optical system disposed between the dispersion optical system and the condensing element and optically coupled to the dispersion optical system and the condensing element, the prism optical system adapting spatial positions of the frequency components incident on the light deflection element to change linearly for frequencies by linearizing the frequency dependency of the dispersion angles and making incident the plurality of frequency components on the condensing element.