Author Affiliations
Abstract
1 Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
2 University of Chinese Academy of Sciences, Beijing 100049, China
3 Institute of Optoelectronic Engineering, Jinan University, Guangzhou 510632, China
We observe a nonlinear response of a dual-wavelength Nd:YAG laser when subjected to low-frequency periodic modulations of cavity losses. The modulation frequency is far from the relaxation oscillation frequency. The harmonic resonances of the two laser wavelengths associated with antiphase intensity oscillations are demonstrated and resonances up to the fourth order were observed. For relatively weak modulation, the intensity oscillation frequency of the laser is equal to the modulation frequency. Harmonic resonances occur under a stronger modulation. We find that more harmonic components appear when the modulation frequency is increased. Furthermore, with enhancing the modulation, the dominant frequency of the intensity oscillations of both wavelengths is shifted toward the higher-order harmonic frequency.
140.3425 Laser stabilization 140.3480 Lasers, diode-pumped 190.2640 Stimulated scattering, modulation,etc. Chinese Optics Letters
2016, 14(1): 011403
1 中国科学院 福建物质结构研究所,福州 350002
2 福建师范大学 物理与光电信息科技学院,福州 350007
3 青岛海泰光电技术有限公司,山东 青岛 266100
介绍了一台连续激光二极管(LD)端面泵浦声光调Q的高重复频率、高效率1.53 μm人眼安全光学参量振荡激光器。激光基质材料采用Nd:YVO4晶体,采用按Ⅱ类非临界相位匹配切割、长20 mm的KTA晶体作为非线性光学晶体。在LD泵浦功率13.7 W,声光调Q重复频率60 kHz时,获得最高平均功率2.6 W的1.53 μm信号光输出,泵浦光-信号光转换效率达到19%。在最高输出功率2.6 W下测得单脉冲宽度2.9 ns,对应的单脉冲能量和峰值功率分别为43.3 μJ和15 kW。
光学参量振荡器 砷酸钛氯钾晶体 声光调Q 人眼安全 optical parametric oscillator Nd:YVO4 Nd:YVO4 KTA crystal acousto-optically Q-switched eye-safe
