Anisotropic stimulated emission cross-section measurement in Nd: YVO4

doi:10.1088/1674-1056/28/4/044204

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 ⁴F_3/2→⁴I_11/2 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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Anisotropic stimulated emission cross-section measurement in Nd: YVO₄