| 摘要 |
A wavelength selective switch and a wavelength selection method are provided. The wavelength selective switch comprises a plurality of input ports, via which a plurality of light beams are input respectively, each light beam including at least one optical signal of a predetermined wavelength; at least one output port; and a wavelength separation apparatus including a wavelength separation device and a micro-mirror group, the wavelength separation device being configured to separate at least one optical signal from a light beam input via a predetermined one of the plurality of input ports, and the micro-mirror group being configured to adjust a propagation direction of the at least one optical signal, so that the at least one optical signal is output via a predetermined one of the at least one output port. |
| 主权项 |
1. A wavelength selective switch, comprising:
a plurality of input ports, via which a plurality of light beams are input respectively, each light beam including at least one optical signal of a predetermined wavelength; at least one output port; and a wavelength separation apparatus including a wavelength separation device and a micro-mirror group, the wavelength separation device being, configured to separate at least one optical signal from a light beam input via a predetermined input port of the plurality of input ports, and the micro-mirror group being configured to adjust a propagation direction of the at least one optical signal so that the at least one optical signal is output via a predetermined output port of the at least one output port, wherein the wavelength separation apparatus further includes: a beam expanding device configured to beam-expand the plurality of light beams, so that the plurality of expanded light beams are incident onto the wavelength separation device, wherein the beam expanding device includes a cylindrical lens and a first focusing lens; wherein the wavelength separation apparatus further includes: a convergence device configured to converge the at least one optical signal emitted from the wavelength separation device onto the input micro-mirror array corresponding to the predetermined input port, wherein the convergence device includes a second focusing lens, wherein the focal length of the cylindrical lens is f0 in the x-z plane and the focal length of the first focusing lens is f1, and the focal length of the second focusing lens is f1, the cylindrical lens, the first focusing lens, the wavelength separation apparatus, the second focusing lens, and the micro-mirror group are arranged in order so that distances among them satisfy relationship as follows: the distance between the cylindrical lens and the first focusing lens is f0+f1, the distance between any one of the first focusing lens and the second focusing lens and the wavelength separation apparatus is f1, and the distance between the second focusing lens and the micro-mirror group is f1, wherein the micro-mirror group includes a plurality of input-side micro-mirror arrays corresponding to the plurality of input ports respectively, and at least one output-side micro-mirror array corresponding to the at least one output port, and an input-side micro-mirror array corresponding to the predetermined input port is configured to directly reflect the at least one optical signal to an output-side micro-mirror array corresponding to the predetermined output port, wherein the plurality of input-side micro-mirror arrays reflect a plurality of optical signals of different wavelengths from different input ports to one output-side micro-mirror array corresponding to one predetermined output port. |
