Anisotropic stimulated emission cross-section measurement in Nd:YVO_4

作     者：Rui Guo Yijie Shen Yuan Meng Mali Gong 郭瑞;申艺杰;孟鸢;巩马理

作者机构：Department of Precision Instrument State Key Laboratory of Precision Measurement and Instruments Tsinghua University Department of Precision Instrument State Key Laboratory of Tribology Tsinghua University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2019年第28卷第4期

页      面：202-206页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

主　　题：solid-state lasers stimulated emission cross-section Nd:YVO4 laser spectroscopy 

摘      要：As a crucial parameter in the design and analysis of laser performances, stimulated emission(SE) cross-section is currently considered to be dependent on several factors, such as temperatures and eigen-polarizations for anisotropic crystals. In contrast with these factors, impact of propagating directions upon SE cross-section has garnered less *** this paper, to investigate the SE cross-section in arbitrary propagating directions, fluorescence spectra for the transition ~4F_(3/2)→~4I_(11/2) in Nd:YVO_4 are measured in different propagating directions. Based on Fuchtbauer–Ladenburg equation model, the propagating direction-dependent SE cross-section spectra in Nd:YVO_4 are obtained for the first time, to our best knowledge. A novel concept of anisotropic SE cross-section is proposed to interpret the propagating direction-dependent effect. The experiment results reveal that for an arbitrary propagating direction the SE cross-section of e light around 1064 nm can be expressed as a superposition from two principle axial propagating directions with a weight of plane projection.