WAVELENGTH SELECTION POLARIZATION CONTROLLER

[Problem] To provide a wavelength selection polarization controller capable of adjusting the polarizing surface of optical wavelength multiplexing signals, for each wavelength component, and which does not generate time displacement between each component. [Solution] This wavelength selection polarization controller has: a telecentric optical system (11) to which optical wavelength multiplexing signals are incident; a polarization controller (12) that adjusts the polarizing surface of light output from the telecentric optical system; and an output optical system (13) for outputting to an optical path output from the polarization controller. The telecentric optical system (11) has: a first diffraction grating (15) to which the optical wavelength multiplexing signals are incident; and a first condensing lens (16) that condenses the optical wavelength multiplexing signals that have passed through the diffraction grating (15). The polarization controller (12) has a plurality of phase modulators (21, 22, 23).