Optical path control device

摘要

In an optical path control device, a light input section 1 forms optical apertures 61a, 61b to output dispersed beams L2a, L2b, respectively, so that propagation angles of the dispersed beams L2a, L2b in an YZ plane are different from each other, at a focal position on the dispersive element 5 side of an optical power element 6. The dispersed beams L2a, L2b propagating at their respective angles different from each other in the YZ plane are individually coupled to optical deflectors 7a, 7b, respectively.

主权项

1. An optical path control device comprising first to thirteenth elements,
wherein the first element includes a first input port to which a first wavelength-multiplexed beam is input and a second input port to which a second wavelength-multiplexed beam is simultaneously input, wherein the second element is comprised of the third and fourth elements and is an anamorphic converter configured to convert an aspect ratio of beam spots of the first and second wavelength-multiplexed beams input from the first and second input ports, wherein the third element includes first and second optical power elements arranged in juxtaposition in propagation directions of the first and second wavelength-multiplexed beams and configured to converge the first and second wavelength-multiplexed beams in a plane spanned by the propagation directions of the first and second wavelength-multiplexed beams and a first direction, wherein the fourth element includes a third optical power element configured to collimate the first and second wavelength-multiplexed beams in a plane spanned by a second direction perpendicular to the first direction and the propagation directions of the wavelength-multiplexed beams, wherein the fifth element is a first dispersive element configured to rotate a propagation direction of light of each wavelength included in each of the first and second wavelength-multiplexed beams around an axis along the first direction depending upon the wavelength, in a plane spanned by the propagation directions of the first and second wavelength-multiplexed beams output from the second element and the second direction, thereby to generate each of a plurality of first dispersed beams and a plurality of second dispersed beams characterized by wavelengths, wherein the sixth element includes a fourth optical power element configured to converge each of the first and second dispersed beams and align propagation directions of the first and second dispersed beams with each other, in a plane spanned by the propagation directions of the first and second dispersed beams output from the fifth element and the second direction, wherein the seventh element is first and second optical deflectors configured to rotate each of the first and second dispersed beams around an axis along a third direction perpendicular to the first direction, in a plane spanned by the propagation directions of the first and second dispersed beams output from the sixth element and the first direction, the first and second optical deflectors being provided in juxtaposition in the first direction, wherein the eighth element includes a fifth optical power element configured to rotate each of the first and second dispersed beams output from the seventh element around an axis along a fourth direction perpendicular to the third direction depending upon the wavelength, in a plane spanned by the propagation directions of the first and second dispersed beams output from the seventh element and the third direction, wherein the ninth element is a second dispersive element configured to multiplex each of the first and second dispersed beams, in a plane spanned by the propagation directions of the first and second dispersed beams output from the eighth element and the third direction, to generate first and second multiplexed beams, wherein the tenth element is comprised of the eleventh and twelfth elements and is an anamorphic converter configured to convert an aspect ratio of beam spots of the first and second multiplexed beams, wherein the eleventh element includes sixth and seventh optical power elements configured to converge the first and second multiplexed beams in a plane spanned by propagation directions of the first and second multiplexed beams and the fourth direction, wherein the twelfth element includes an eighth optical power element configured to converge the first and second multiplexed beams in a plane spanned by the propagation directions of the first and second multiplexed beams and the third direction, wherein the thirteenth element includes first and second output ports configured to output the first and second multiplexed beams, respectively, output from the tenth element, wherein the first element forms first and second optical apertures to output the first and second dispersed beams, respectively, so that propagation angles of the first and second dispersed beams are different from each other in a second plane spanned by the propagation directions of the first and second dispersed beams and the first direction, at a focal position on the fifth element side of the sixth element, and wherein the first and second dispersed beams having propagated at the respective angles different from each other in the second plane are individually coupled to the first and second optical deflectors, respectively.