Anisotropic stimulated emission cross-section measurement in Nd∶YVO4

• 来源期刊: 中国物理B（英文版）
• 关键词: solid-state lasers stimulated emission cross-section Nd∶YVO4 laser spectroscopy
• 年，卷（期）: 2019,（4）
• 页码范围: 202-206
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1056/28/4/044204

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 attention.In this paper,to investigate the SE cross-section in arbitrary propagating directions,fluorescence spectra for the transition 4F3/2 → 4I11/2 in Nd:YVO4 are measured in different propagating directions.Based on Fuchtbauer-Ladenburg equation model,the propagating direction-dependent SE cross-section spectra in Nd∶YVO4 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.