Optical unit for wavelength selecting switch and wavelength selecting switch

摘要

An optical unit for a wavelength-selecting switch according to the present invention comprises: an input port; a dispersion section that produces wavelength dispersion of input light that is input from the input port; a light-collecting element that collects the light dispersed by the dispersion section; an output port; an optical path correction section that shifts the light that is dispersed by the dispersion section; an adjustment section that changes the amount of shift produced by the optical path correction section; and a casing that hermetically seals the input port, dispersion section, light-collecting element, output port, and optical path correction section. The casing has an optically transparent section in a location onto which the light that is collected by the light-collecting element is directed. The adjustment section is arranged outside the casing. The optical path correction section can be controlled from outside the casing by the adjustment section.

主权项

1. A wavelength selecting switch comprising:
at least one input port for emitting an input light; a lens array for converting light from the at least one input port into parallel lights; a dispersing portion which disperses the input light into a plurality of wavelengths; a converging element which receives the plurality of wavelengths dispersed in a wavelength dispersion direction, and which converges each wavelength dispersed by the dispersing portion; a deflecting portion which independently deflects each wavelength converged by the converging element; a plurality of output ports which outputs the light deflected by the deflecting portion as one or more output lights; an optical bench including a support surface, which supports at least the dispersing portion and the converging element; and a casing which accommodates and retains the optical bench, and which includes first and second orthogonal faceplates; wherein the optical bench is attached to the first faceplate, whereby the support surface is orthogonal to a surface of the second faceplate, which has the greatest project area of the casing.