Patent ID: 6775439
Filing Date: 2004-08-10
Classification: G02B

Abstract:
An optical circuit device comprising:a filter that transmits lightwaves having wavelengths in a desired wavelength range and reflects lightwaves having wavelengths in another desired wavelength range; a mirror capable of reflecting lightwaves reflected by the filter and disposed substantially parallel to the filter; a second optical path having a plurality of curved optical waveguides extending between the filter and the mirror to enable mutual reflection between the filter and the mirror through the curved optical waveguides, each of the curved optical waveguides, which is extended from a light-receiving side of the mirror to a light-receiving side of the filter, being an optical waveguide that changes the direction of propagation of a lightwave gradually and continuously; a first optical path optically connected to a predetermined end of the curved optical waveguide of the second optical path to serve as an input/output end; and third optical paths formed at positions opposite to a side of the second optical path with respect to the filter so as to correspond to predetermined positions included in a group including positions where the curved optical waveguides of the second optical path optically connected to the first optical path are joined to the filter, and positions where the curved optical waveguides of the second optical path extending between the filter and the mirror are joined to the filter, and so as to make emitted lightwaves from the third optical paths having equal wavelength intervals, wherein the curved optical waveguides of the second optical path have at least two incident angles on the filter.