WAVELENGTH CONVERSION ELEMENT, WAVELENGTH CONVERSION METHOD, PHASE MATCHING METHOD, AND LIGHT SOURCE DEVICE,申请号EP20080740582-传众专利搜索

WAVELENGTH CONVERSION ELEMENT, WAVELENGTH CONVERSION METHOD, PHASE MATCHING METHOD, AND LIGHT SOURCE DEVICE

申请公布号：EP2148241(A4)

申请号：EP20080740582

申请日期：2008.04.17

申请公布日期：2010.11.03

申请人：

NIKON CORPORATION;NATIONAL INSTITUTE FOR MATERIALS SCIENCE

发明人：MURAMATSU, KENICHI;KURIMURA, SUNAO

分类号：G02F1/37;G02F1/355

主分类号：G02F1/37

摘要：A wavelength conversion element is provided as one including a monocrystalline nonlinear optical crystal. The nonlinear optical crystal has: a plurality of first regions having a polarity direction along a predetermined direction; a plurality of second regions having a polarity direction opposite to the predetermined direction; an entrance face into which a fundamental incident wave having a wavelength » and a frequency É is incident in a direction substantially perpendicular to the predetermined direction; and an exit face from which a second harmonic with a frequency 2É generated in the crystal emerges. The plurality of first and second regions are formed as alternately arranged in a period substantially equal to d expressed by a predetermined expression, between the entrance face and the exit face.