Zhang Peng, Ma Yanghua, Zhao Jianlin, Yang Dexing, Xu Honglai
Institute of Optical Information Science and Technology, School of Science, Northwestern Polytechnical University, Xi'an, China.
Appl Opt. 2006 Apr 1;45(10):2273-8. doi: 10.1364/ao.45.002273.
The anisotropic dependence of the formation of one-dimensional (1-D) spatial dark solitons on the orientation of intensity gradients in lithium niobate crystal is numerically specified. Based on this, we propose an approach to fabricate channel waveguides by employing 1-D spatial dark solitons. By exposure of two 1-D dark solitons with different orientations, channel waveguides can be created. The structures of the channel waveguides can be tuned by adjustment of the widths of the solitons and/or the angles between the two exposures. A square channel waveguide is experimentally demonstrated in an iron-doped lithium niobate crystal by exposure of two orthogonal 1-D dark solitons in sequence.
数值确定了铌酸锂晶体中一维（1-D）空间暗孤子的形成对强度梯度取向的各向异性依赖性。基于此，我们提出了一种利用1-D空间暗孤子制造通道波导的方法。通过曝光两个不同取向的1-D暗孤子，可以创建通道波导。通道波导的结构可以通过调整孤子的宽度和/或两次曝光之间的角度来调节。通过依次曝光两个正交的1-D暗孤子，在掺铁铌酸锂晶体中实验展示了一个方形通道波导。
