公开(公告)号：US20020024718A1

公开(公告)日：2002-02-28

申请号：US09933085

申请日：2001-08-21

Applicant: Riken

Inventor： Kodo Kawase ,  Hiromasa Ito ,  Jun-ichi Shikata

IPC: G02F001/39

CPC classification number: G02F1/39 ,  G02F2201/302 ,  G02F2203/13

Abstract: A THz-wave generator according to the present invention includes a nonlinear optical crystal 1 capable of parametric generation, a first laser device 12 for injecting a single-frequency first laser beam 7 as a pump wave into the nonlinear optical crystal, and a second laser device 14 for injecting a different single-frequency second laser beam 8 to thereby injection-seed a second laser beam 8 in a direction in which an idler wave is generated by the pump wave. By this configuration, it is possible, in generation of a THz-wave by use of the parametric effect in the nonlinear optical crystal under a non-collinear phase matching condition, to greatly increase an power of the THz-wave, to narrow its spectrum width, to make variable the wavelength of a generated THz-wave, and to hold its generation direction almost constant.

Abstract translation: 根据本发明的太赫兹波发生器包括能够参数化生成的非线性光学晶体1，用于将单频第一激光束7作为泵波注入到非线性光学晶体中的第一激光器件12和第二激光器 装置14，用于注入不同的单频第二激光束8，从而在由泵浦波产生惰轮的方向上注入种子第二激光束8。 通过这种结构，在非线性相位匹配条件下，通过使用非线性光学晶体中的参数效应来产生THz波可以大大增加THz波的功率，以使其频谱变窄 宽度，使生成的THz波的波长变化，并保持其生成方向几乎恒定。