1. Research on Nonlinear Absorption Effect in KDP and 70%-DKDP Crystals
- Author
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Chuanying Shen, Pingping Huang, Duanliang Wang, Hui Liu, Weidong Li, Robert I. Boughton, Jiyang Wang, and Shenglai Wang
- Subjects
Materials science ,Z-scan ,General Chemical Engineering ,02 engineering and technology ,01 natural sciences ,Two-photon absorption ,Molecular physics ,law.invention ,010309 optics ,Inorganic Chemistry ,Nonlinear optical ,Optics ,law ,0103 physical sciences ,KDP and 70%-DKDP crystals ,lcsh:QD901-999 ,General Materials Science ,Z-scan technique ,Absorption (electromagnetic radiation) ,nonlinear absorption effect ,Nonlinear absorption ,business.industry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Laser ,Wavelength ,lcsh:Crystallography ,0210 nano-technology ,business ,Excitation - Abstract
Nonlinear optical absorption effect in KDP and 70%-DKDP crystals, which were grown by the conventional temperature cooling method, was systematically studied using picosecond pulse laser excitation. Using open aperture Z-scan measurements, the dependence of nonlinear absorption effect on sample orientations (I, II, and z) as well as laser intensity was systematically measured at λ = 1064 and 532 nm. According to the experimental results, the nonlinear absorption effect at λ = 532 nm was confirmed, while at λ = 1064 nm no nonlinear absorption was observed for KDP and 70%-DKDP crystals. In addition, the optical absorption along I- and II-type affected by laser intensity was larger than that along the z-direction. The important nonlinear absorption coefficients β and χ I ( 3 ) (esu) measured along different orientations were exhibited in detail at wavelengths of 1064 nm and 532 nm. The results indicate that nonlinear absorption coefficients increase first and then decrease with the increment of laser intensity for KDP and 70%-DKDP crystals.
- Published
- 2017