Open AccessThe evolution law of KTP SHG conversion efficiency in special repetition rate
Author(s) -
Qiuhui Zhang,
Guoying Feng,
Jinghua Han,
Li Bin-Hou,
Xudong Xie,
Qihua Zhu
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.5533
Subject(s) - attenuation coefficient , materials science , energy conversion efficiency , second harmonic generation , crystal (programming language) , thermal conduction , optics , electron density , absorption (acoustics) , laser , electron , optoelectronics , atomic physics , physics , quantum mechanics , computer science , composite material , programming language
Based on the conduction band electron density and the expression of the effective dielectric function, the absorption coefficient at 532nm of KTP crystal is deduced. The evolution law of conduction band electron density, absorption coefficient and second harmonic generation (SHG) conversion efficiency are comparatively studied. The results are as follows. The 532 nm absorption coefficient of KTP crystal is increasing with conduction band electron density, and the SHG conversion efficiency is decreasing with conduction band electron density. When the power density of fundamental frequency laser is a fixed value, conduction band electron density shows accumulation effects a different repetition rates, which caused the 532 nm transmission and the SHG conversion efficiency of KTP crystal to vary exponentially with acting time, and the accumulation effect is increasing obviously with repetition rate, but conduction band electron density and absorption coefficient approach thir steady values.