title: Polarization independent varifocal lens using KTN crystals.
abstract: We fabricated a polarization-independent varifocal lens using KTa(1-x)Nb(x)O3 (KTN) crystals. The polarization dependence of the KTN crystal is effectively compensated for by combining a pair of KTN lenses and a half-wave plate. This compensation is achieved by a total electro-optic effect, which consists of the Kerr effect and the elasto-optic effects via the electrostrictive and elastic strains in the KTN crystal.
authors.affiliation: NTT Photonics Laboratories, Nippon Telegraph and Telephone Corporation, Atsugi, Kanagawa, Japan. inagaki.takahiro@lab.ntt.co.jp
authors.forename: Takahiro
authors.initials: T
authors.lastname: Inagaki
authors.forename: Tadayuki
authors.initials: T
authors.lastname: Imai
authors.forename: Jun
authors.initials: J
authors.lastname: Miyazu
authors.forename: Junya
authors.initials: J
authors.lastname: Kobayashi
mesh_terms: D007909:Lenses; D009556:Niobium / Q000737:chemistry*; D055620:Optical Phenomena; D010087:Oxides / Q000737:chemistry*; D011188:Potassium / Q000737:chemistry*; D013635:Tantalum / Q000737:chemistry*
chemical_list: D010087:Oxides; D009556:Niobium; D013635:Tantalum; D011188:Potassium