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Dynamical properties of total intensity fluctuation spectrum in two-mode Nd:YVO_4 microchip laser

Dynamical properties of total intensity fluctuation spectrum in two-mode Nd:YVO_4 microchip laser
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摘要 We investigate the total intensity fluctuation spectrum of the two-longitudinal- mode Nd：YVO4microchip 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：YVO4ML 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. We investigate the total intensity fluctuation spectrum of the two-longitudinal- mode Nd：YVO4microchip 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：YVO4ML 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.
作者 张韶辉 张书练 谈宜东 孙利群
机构地区 Institude of Opto-electronic Engineering
出处 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第12期325-328,共4页 中国物理B（英文版）
基金 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) the Special-funded Programme on National Key Scientific Instruments and Equipment Development of China(Grant No.2011YQ04013603)
关键词 lasers and laser optics chaos lasers NEODYMIUM FLUCTUATIONS RELAXATIONS and noise laser theory lasers and laser optics,chaos,lasers,neodymium,fluctuations,relaxations,and noise,laser theory
分类号 TN248 [电子电信—物理电子学]
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Chinese Physics B
2015年 第12期

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