| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a terahertz wave generating apparatus and a spectroscopic measurement apparatus which are compact, highly efficient, wideband, high in resolution and excellent in temperature stability, and can simultaneously measure imaginary and real parts of a refractive index and also measure a polarization property. <P>SOLUTION: In the apparatus, a grating and a beam expander are disposed in a resonator of a laser light source for exciting a GaP crystal, thereby making a linewidth narrow without any damage, and an optical path for simultaneously measuring transmission and reflection of a measured sample is made up, and the GaP crystal is rotated in order to obtain the polarization property. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
