申请人:MINNESOTA MINING AND MANUFACTURING COMPANY
公开号:EP0266882A2
公开(公告)日:1988-05-11
This invention is concerned with materials for nonlinear optical devices for the conversion of optical energy at one frequency to optical energy at another frequency.
Laser techniques have been developed so that it is possible to obtain a limited number of fundamental frequencies of coherent laser light by utilizing solid, gas, and liquid media. However, in many applications, laser light having frequencies not among the fundamental frequencies obtainable is required, and in some cases laser light exhibiting a continuous spectrum over a certain range of frequencies is required.
Inorganic materials have been used extensively for nonlinear optical applications. However, they are only of limited use because of their bandwidth limitations.
The possibility of using organic materials in nonlinear optical devices has generated much interest recently because a large number of organic materials are available for investigation and because they do not have the bandwidth limitations of inorganic materials.
This invention provides devices comprising a laser source of coherent light radiation at a fixed fundamental frequency, a crystalline N,Nʹ-substituted barbituric acid that crystallizes in a non-centrosymmetric configuration, means for directing the output radiation of the laser onto the N,Nʹ-substituted barbituric acid, and output means for utilizing the second harmonic frequency.
本发明涉及将一种频率的光能转换为另一种频率的光能的非线性光学设备材料。
激光技术的发展使人们有可能通过利用固体、气体和液体介质获得数量有限的基频相干激光光。然而,在许多应用中,需要的激光频率并不在可获得的基频之列,在某些情况下,还需要在一定频率范围内显示连续光谱的激光。
无机材料已被广泛应用于非线性光学领域。然而,由于带宽的限制,它们的用途有限。
最近,人们对在非线性光学设备中使用有机材料的可能性产生了浓厚的兴趣,因为有大量有机材料可供研究,而且它们没有无机材料的带宽限制。
本发明提供的装置包括一个固定基频相干光辐射激光源、一个以非中心对称构型结晶的 N,Nʹ-取代巴比妥酸晶体、将激光输出辐射引导到 N,Nʹ-取代巴比妥酸上的装置以及利用二次谐波频率的输出装置。