Three-dimensional dielectric crystalline waveguide beam splitters in mid-infrared band by direct femtosecond laser writing.


We report on the fabrication of three-dimensional waveguide beam splitters in a dielectric Bi(4)Ge(3)O(12) (BGO) crystal by direct femtosecond laser writing. In the laser written tracks of BGO crystal, positive refractive index is induced, resulting in so-called Type I configuration waveguiding cores. The "multiscan" technique is utilized to shape cores… (More)
DOI: 10.1364/OE.22.031293


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