| 摘要 |
<p>According to one aspect of the present invention a method for increasing intensity of a polarized multimode laser beam including the steps of: (i) changing polarization of a portion of a cross section of the multimode laser beam, so that the cross section of this multimode laser beam comprises a first portion with one polarization and a second portion with a polarization that is different from this one polarization; and (ii) at least partially superimposing the first portion of the cross section of the multimode laser beam onto the second portion of the cross section of the multimode laser beam, thereby forming a superimposed laser beam. According to another aspect of the present invention an optical apparatus includes: (i) a multimode laser adapted to provide a multimode laser beam along a path; (ii) at least one polarization changing component partially intercepting the path to change polarization of laser light intercepted by this component, so that a multimode laser beam provided along the path has a cross section with two portions of differing polarization; and (iii) a polarization combiner overlapping the two portions of the multimode laser beam, thereby forming a concentrated laser beam. <IMAGE></p> |
