Dynamical properties of total intensity fluctuation spectrum in two-mode Nd:YVO4 microchip laser

doi:10.1088/1674-1056/24/12/124203

Abstract

We investigate the total intensity fluctuation spectrum of the two-longitudinal-mode Nd:YVO₄ microchip laser (ML). We find that low-frequency relaxation oscillation (RO) peaks still appear in the total intensity fluctuation spectrum, which is different from a previous research result that the low-frequency RO peaks exist in the spectrum of the individual mode but compensate for each other totally in the total intensity fluctuation spectrum. Taking the spatial hole-burning effect into account, one and two-mode rate equations for Nd:YVO₄ ML laser are established and studied. Based on the theoretical model, we find that when the gains and losses for two longitudinal models are different, a low-frequency RO peak will appear in the total intensity fluctuation spectrum, while when they share the same gain and loss, the total spectrum will behave like that of a single mode laser. Theoretical simulation results coincide with experimental results very well.

Keywords: lasers and laser optics chaos lasers neodymium fluctuations relaxations and noise laser theory

Received: 01 July 2015
Revised: 20 July 2015
Accepted manuscript online:

PACS:	42.55.Ah	(General laser theory)
	42.55.Sa	(Microcavity and microdisk lasers)
	42.55.Rz	(Doped-insulator lasers and other solid state lasers)

Fund:

Project supported by the Beijing Higher Education Young Elite Teacher Project, China (Grant No. YETP0086), the Tsinghua University Initiative Scientific Research Programme, China (Grant No. 2012Z02166), and the Special-funded Programme on National Key Scientific Instruments and Equipment Development of China (Grant No. 2011YQ04013603).

Corresponding Authors: Zhang Shu-Lian
E-mail: zsl-dpi@mail.tsinghua.edu.cn

Cite this article:

Zhang Shao-Hui (张韶辉), Zhang Shu-Lian (张书练), Tan Yi-Dong (谈宜东), Sun Li-Qun (孙利群) Dynamical properties of total intensity fluctuation spectrum in two-mode Nd:YVO₄ microchip laser 2015 Chin. Phys. B 24 124203

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Dynamical properties of total intensity fluctuation spectrum in two-mode Nd:YVO4 microchip laser

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Dynamical properties of total intensity fluctuation spectrum in two-mode Nd:YVO₄ microchip laser