中国物理B ›› 2015, Vol. 24 ›› Issue (12): 124203-124203.doi: 10.1088/1674-1056/24/12/124203
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
张韶辉, 张书练, 谈宜东, 孙利群
Zhang Shao-Hui (张韶辉), Zhang Shu-Lian (张书练), Tan Yi-Dong (谈宜东), Sun Li-Qun (孙利群)
摘要:
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.
中图分类号: (General laser theory)