中国物理B ›› 2014, Vol. 23 ›› Issue (6): 64218-064218.doi: 10.1088/1674-1056/23/6/064218
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
陈霄a, 肖起榕b, 金光勇a, 闫平b, 巩马理b
Chen Xiao (陈霄)a, Xiao Qi-Rong (肖起榕)b, Jin Guang-Yong (金光勇)a, Yan Ping (闫平)b, Gong Ma-Li (巩马理)b
摘要: An acoustic-optic Q-switched all-fiber laser with a high-repetition-rate, a short pulse width, a wide spectrum, and a high conversion efficiency is experimentally demonstrated. In the laser configuration, a (1+1)×1 side-pumping coupler is introduced to perform backward pumping, and a 10/130-um Yb fiber is adopted. The acoustic-optic component operates in the first direction, achieving a Q-switched pulse with a repetition rate adjustable in the range of 20 kHz-80 kHz. Under a repetition rate of 20 kHz and a pump power of 6.76 W, the fiber laser obtains a highly efficient and stable pulse output, with an average power of 4.3 W, a pulse width of 56 ns, a peak power of 3.83 kW, and a power density of 1.39×1010 W/cm2. Particularly, the optic-optic conversion efficiency of the laser reaches as high as 64%. Another feature of the pulsed laser is that the high reflection mirror reflects the pump light as well, which brings the secondary absorption of the pump power into the gain fiber.
中图分类号: (Q-switching)