NTT Photonics Laboratories, Nippon Telegraph and Telephone Corporation, Atsugi, Kanagawa, Japan.
Opt Lett. 2013 Aug 1;38(15):2673-5. doi: 10.1364/OL.38.002673.
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.
我们使用 KTa(1-x)Nb(x)O3（KTN）晶体制造了一种偏振无关的可变焦透镜。通过组合一对 KTN 透镜和半波片，可以有效地补偿 KTN 晶体的偏振依赖性。这种补偿是通过总电光效应实现的，该效应包括 KTN 晶体中的克尔效应和通过电致伸缩和弹性应变的弹光效应。
