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

作　　者：张韶辉 张书练 谈宜东 孙利群 

机构地区：[1]Institude of Opto-electronic Engineering, Department of Precision Instruments, Tsinghua University

出　　处：《Chinese Physics B》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)

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.

关 键 词：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]