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We demonstrated the generation of ultra-broadband optical pulses with axially-symmetric polarization, on the basis of a coherent beam combining technique. The high polarization purity (∼95 %) ranging from 750 to 880 nm was obtained.
A radially- or azimuthally-polarized mode is one of the axially-polarized modes, changing its local polarization state as a function of the azimuthal angle. It can be expressed by a superposition of the left-circularly polarized (LCP; s = +1: spin angular momentum (SAM) of light) l= — 1 optical vortex and the right-circularly polarized (RCP;s= — 1) l = + 1 optical vortex. Here, the term optical vortex...
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