WAVELENGTH SELECTIVE SWITCH AND OPTICAL CROSS-CONNECTION DEVICE USING SAME

The invention provides a wavelength selection switch capable of coping with a wide frequency band and reducing crosstalk, and an optical cross connection device using the wavelength selection switch. The wavelength selective switch includes: an optical input port; an optical output port; a wavelength dispersion unit that spatially separates the incident light from the light input port for each wavelength and emits the light such that the emission angle of the light incident from the light input port differs for each predetermined wavelength region; and a deflection unit that couples light to the light output port by variably deflecting the reflection angle or transmission angle of light incident from the wavelength dispersion unit for each wavelength, the wavelength dispersion unit including: a wavelength dispersion element; and a position control mechanism that reversibly changes the position, angle, or both of the wavelength dispersion element with respect to the light input port. 本发明提供一种能够应对宽频带且降低了串扰的波长选择开