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公开(公告)号:US6143208A
公开(公告)日:2000-11-07
申请号:US799431
申请日:1997-02-12
申请人: Richard Buchecker , Xin Hua Chen , Jurg Fufschilling , Rolf-Peter Herr , Martin Schadt , Klaus Schmitt
发明人: Richard Buchecker , Xin Hua Chen , Jurg Fufschilling , Rolf-Peter Herr , Martin Schadt , Klaus Schmitt
IPC分类号: G02F1/35 , C07C229/34 , C07C229/56 , C07C229/64 , C07D239/26 , C08F12/26 , C08F16/28 , C08F18/22 , C08F20/36 , C09K3/00 , G02F1/141 , G02F1/355 , G02F1/361 , G02F1/37 , G02F1/377 , H01S3/109 , F21V9/00 , C07C69/76 , C07C211/00
CPC分类号: C07D239/26 , C07C229/64 , G02F1/3775 , G02F1/141 , G02F2001/3548
摘要: An optical frequency conversion element has a wave-guiding layer which consists of a .chi..sup.(2) -active ferroelectric liquid crystal. The monomeric or polymeric liquid crystal material has a periodic structure which permits the so-called quasi phase matching of a guided laser beam. The period length of the structure is equal to twice the coherence length l.sub.c =.pi./.DELTA..beta. of the material, whereby .DELTA..beta.=.beta..sub.o (2.omega.)-2.beta..sub.o (.omega.), with .omega.=angular frequency of the fundamental wave, 0=zero-order mode and .beta.=propagation constant of the mode.
摘要翻译: 光变换元件具有由chi(2)活性铁电液晶构成的波导层。 单体或聚合物液晶材料具有允许引导的激光束的所谓的准相位匹配的周期性结构。 结构的周期长度等于材料的相干长度lc = pi / DELTAβ的两倍,其中ΔTA=ω(2ω)-2βo(ω),ω=基波的角频率 ,0 =零阶模式,β=模式的传播常数。