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Chin. Phys. B, 2019, Vol. 28(4): 044204    DOI: 10.1088/1674-1056/28/4/044204
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Anisotropic stimulated emission cross-section measurement in Nd: YVO4

Rui Guo(郭瑞)1, Yijie Shen(申艺杰)1, Yuan Meng(孟鸢)1, Mali Gong(巩马理)1,2
1 Department of Precision Instrument, State Key Laboratory of Precision Measurement and Instruments, Tsinghua University, Beijing 100084, China;
2 Department of Precision Instrument, State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
Abstract  

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 4F3/24I11/2 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.

Keywords:  solid-state lasers      stimulated emission cross-section      Nd:YVO4      laser spectroscopy  
Received:  16 August 2018      Revised:  18 January 2019      Accepted manuscript online: 
PACS:  42.55.Ah (General laser theory)  
  42.60.Lh (Efficiency, stability, gain, and other operational parameters)  
  42.62.Fi (Laser spectroscopy)  
  42.60.By (Design of specific laser systems)  
Corresponding Authors:  Mali Gong     E-mail:  gongml@mail.tsinghua.edu.cn

Cite this article: 

Rui Guo(郭瑞), Yijie Shen(申艺杰), Yuan Meng(孟鸢), Mali Gong(巩马理) Anisotropic stimulated emission cross-section measurement in Nd: YVO4 2019 Chin. Phys. B 28 044204

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