OBSERVATION OF RAMAN SCATTERING AND FLUORESCENT SPECTRA OF KTiOPO₄ ( KTP ) CRYSTAL

By measuring Raman scattering spectra of KTiOPO₄(KTP) crystal with several configurations, we found the orientation of polarizability tensor in flux-grown KTP (KTP_F) was perpendicular to the orientation of polarizability tensor in hydrothermally grown KTP (KTP_H). Fluorescent and Raman spectra of KTP were measured from room temperature to 4.2K. The appearance of peaks at 135cm^-1 and 800cm^-1 at 77K and the temperature dependence of Raman spectrum lines are discussed.