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    • 1. 发明授权
    • Laser beam generating apparatus and method
    • 激光束发生装置及方法
    • US06240111B1
    • 2001-05-29
    • US09289244
    • 1999-04-09
    • Shigeo KubotaNobuhiko UmezuTatsuo FukuiHisashi MasudaKoichi Tatsuki
    • Shigeo KubotaNobuhiko UmezuTatsuo FukuiHisashi MasudaKoichi Tatsuki
    • H01S310
    • G02F1/37
    • A laser beam generating apparatus comprising a first laser beam source oscillating in a near infrared-ray region of, for example, an Nd:YAG laser to generate a laser beam, a second higher harmonic wave generator for generating, from the laser beam emitted from the first laser beam source, a second higher harmonic wave having a half wavelength of the laser beam emitted from the first laser beam source, a splitter for splitting the second higher harmonic wave, a second laser beam source which is supplied with a part of the second higher harmonic wave thus split is input to a Ti:Sapphire laser to be excited and oscillated, thereby generating a laser beam of substantially 700 nm in wavelength, a fourth higher harmonic wave generator for generating a fourth higher harmonic wave from the remaining part of the second higher harmonic wave thus split, a sum frequency mixing composed of a BBO crystal device to which the laser beam of substantially 700 nm in wavelength and the fourth higher harmonic wave are input, and a controller for controlling the temperature of the BBO crystal device to substantially 100K or less, thereby generating a laser beam of substantially 193 nm in wavelength as an output of the sum frequency mixing.
    • 一种激光束产生装置,包括:在例如Nd:YAG激光器的近红外线区域中振荡的第一激光束源,以产生激光束;第二高次谐波发生器,用于从从 第一激光束源,具有从第一激光束源发射的激光束的半波长的第二高次谐波,用于分离第二高次谐波的分离器,被提供有第一激光束的一部分的第二激光束源 将这样分割的第二高次谐波输入到激发和振荡的Ti:蓝宝石激光器中,从而产生大致为700nm的波长的激光束;第四高次谐波发生器,用于从剩余部分产生第四高次谐波 这样分裂的第二高次谐波,由BBO晶体器件组成的和频混频,其中波长大致为700nm的激光束和第四较高谐波 尼康波输入,以及用于将BBO晶体装置的温度控制在基本上为100K以下的控制器,由此产生大致193nm的波长的激光束作为和频混合的输出。
    • 4. 发明授权
    • Method of producing single crystal of KTiOPO.sub.4
    • 生产KTiOPO4单晶的方法
    • US5370076A
    • 1994-12-06
    • US056530
    • 1993-05-05
    • Tsutomu OkamotoKoji WatanabeTatsuo FukuiYasushi MinoyaKoichi TatsukiShigeo Kubota
    • Tsutomu OkamotoKoji WatanabeTatsuo FukuiYasushi MinoyaKoichi TatsukiShigeo Kubota
    • C30B15/00C30B9/00C30B29/22C30B29/32G02F1/35G02F1/355C30B9/12
    • C30B9/00C30B29/14
    • A method of growing a single crystal of KTiOPO.sub.4 which is a nonlinear optical material is disclosed. Growth of the single crystal of KTiOPO.sub.4 is carried out by melting a KTiOPO.sub.4 material with a flux to produce a melt, then contacting a seed crystal to the melt, and by slowly cooling at a saturation temperature or below. At this time, molar fractions of K.sub.2 O, P.sub.2 O.sub.5 and TiO.sub.2 contained in the melt fall within a region surrounded by six point in a K.sub.2 O-P.sub.2 O.sub.5 -TiO.sub.2 ternary phase diagram of A (K.sub.2 O:0.4150, P.sub.2 O.sub.5 :0.3906, TiO.sub.2 : 0.1944), B (K.sub.2 O:0.3750, P.sub.2 O.sub.5 : 0.3565, TiO.sub.2 : 0.2685), C (K.sub.2 O: 0.3750, P.sub.2 O.sub.5 : 0.3438, TiO.sub.2 : 0.2813), D (K.sub.2 O: 0.3850, P.sub.2 O.sub.5 : 0.3260, TiO.sub.2 : 0.2890), E (K.sub.2 O: 0.4000, P.sub.2 O.sub.5 : 0.3344, TiO.sub.2 : 0.2656), and F (K.sub.2 O: 0.4158, P.sub.2 O.sub.5 : 0.3744, TiO.sub.2 : 0.2098). In addition, K.sub.15 P.sub.13 O.sub.40 or the same composition produced by melting is used as the flux, and the proportion of a KTiOPO.sub.4 element in a composition of the melt is prescribed to 83.5 to 90.0 mol %. The seed crystal is set so that a C axis is in a direction perpendicular to a melt surface. Then, the seed crystal contacted to the melt is rotated and slowly cooled. Thus, a single crystal of KTiOPO.sub.4 of single domain at the end of growth can be produced.
    • 公开了一种生长作为非线性光学材料的KTiOPO4单晶的方法。 通过用助熔剂熔化KTiOPO 4材料以产生熔体,然后使晶种接触熔体,并通过在饱和温度或更低温度下缓慢冷却来进行KTiOPO4单晶的生长。 此时,K2O,P2O5和TiO 2的摩尔分数在A(K2O:0.4150,P2O5:0.3906,TiO 2:0.1944),K 2 O 3的K 2 O 5 - (K2O:0.3750,P2O5:0.3565,TiO2:0.2685),C(K2O:0.3750,P2O5:0.3438,TiO2:0.2813),D(K2O:0.3850,P2O5:0.3260,TiO2:0.2890),E(K2O: P 2 O 5:0.3344,TiO 2:0.2656)和F(K 2 O:0.4158,P 2 O 5:0.3744,TiO 2:0.2098)。 此外,将K15P13O40或通过熔融制造的相同组成用作助熔剂,并且将熔体组成中的KTiOPO 4元素的比例规定为83.5〜90.0mol%。 晶种被设定为使得C轴在垂直于熔体表面的方向上。 然后,将与熔体接触的晶种旋转并缓慢冷却。 因此,可以生产在生长结束时单畴KTiOPO4的单晶。