公开(公告)号：US20060013593A1

公开(公告)日：2006-01-19

申请号：US11179794

申请日：2005-07-13

申请人： Masakazu Yokoo ,  Tomoyuki Ishii ,  Kozo Mano ,  Yuji Oki ,  Tatsuo Okada

发明人： Masakazu Yokoo ,  Tomoyuki Ishii ,  Kozo Mano ,  Yuji Oki ,  Tatsuo Okada

IPC分类号： H04B10/00

CPC分类号： G02F1/035 ,  G02F1/3775 ,  G02F2201/16 ,  G02F2202/20

摘要： Disclosed is a light-intensity modulation element, which comprises a substrate made of a nonlinear optical crystal, and a light waveguide formed in a principal surface of the substrate to extend in one direction. The light waveguide includes first and second wavelength conversion portions for converting a part of infrared light introduced into the light waveguide to a second harmonic. Each of the first and second wavelength conversion portions has a plurality of polarization structures serially disposed in the longitudinal direction of the light waveguide in such a manner that their polarities in the thickness direction of the substrate are inverted periodically and alternately in the longitudinal direction of the light waveguide. The light waveguide further includes a phase adjustment portion located between the first and second wavelength conversion portions, and associated with a pair of electrodes disposed in opposed relation to one another on opposite sides thereof. The light-intensity modulation element of the present invention can modulate a light intensity in a compact structure and with enhanced efficiency of conversion to second harmonics.

摘要翻译： 公开了一种光强度调制元件，其包括由非线性光学晶体制成的基板和形成在基板的主表面上以沿一个方向延伸的光波导。 光波导包括用于将引入到光波导中的红外光的一部分转换成二次谐波的第一和第二波长转换部。 第一和第二波长转换部分中的每一个具有沿光波导的纵向方向串联设置的多个偏振结构，使得它们在基板的厚度方向上的极性在周期性地交替地沿着 光波导。 光波导还包括位于第一和第二波长转换部分之间的相位调整部分，并且与在其相对侧上彼此相对设置的一对电极相关联。 本发明的光强度调制元件可以调制紧凑结构中的光强度并提高转换为二次谐波的效率。