Efficient High-Peak-Power Wavelength-Switchable Femtosecond Yb:LGGG Laser
Efficient High-Peak-Power Wavelength-Switchable Femtosecond Yb:LGGG Laser
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DOI：
10.1109/lpt.2014.2375178
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发表时间：
2015-02
影响因子：
2.6
通讯作者：
F. Lou;Z. Jia;Jingliang He;Ruwei Zhao;J. Hou;Zhaowei Wang;Shande Liu;Baitao Zhang;C. Dong
中科院分区：
文献类型：
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作者：
F. Lou;Z. Jia;Jingliang He;Ruwei Zhao;J. Hou;Zhaowei Wang;Shande Liu;Baitao Zhang;C. Dong
首次系统地研究了Yb：（LuxGd 1-x）3Ga 5 O 12（x = 0.062）（Yb：LGGG）无序晶体的光谱特性和超快激光特性。宽的荧光光谱线表明Yb：LGGG在可调谐和超快激光应用方面具有巨大的潜力。在激光实验中，实现了Yb：LGGG被动锁模激光器，在中心波长1029.6nm处获得了最大平均功率1.3W、脉宽324 fs的激光输出，斜率效率高达41.6%。脉冲能量和峰值功率计算为22.4 nJ和69.2 kW。通过优化腔的设计，在中心波长为1026.8 nm处获得了188 fs的最短脉冲宽度。在这种情况下，以27.1%的斜率效率产生0.77W的最大平均输出功率。实验结果表明Yb：LGGG晶体在高效率、高峰值功率飞秒激光方面具有良好的应用前景。
A systematic study of the spectral properties and ultrafast lasing characteristics of Yb:(LuxGd1-x)3Ga5O12(x = 0.062) (Yb:LGGG) disordered crystal was reported for the first time. The broad fluorescence spectral lines indicate a great potential of Yb:LGGG for tunable and ultrafast laser application. In the lasing experiment, a passively mode-locked Yb:LGGG laser was realized, which generated a maximum average power of 1.3 W with pulse duration of 324 fs at the central wavelength of 1029.6 nm, corresponding to a slope efficiency as high as 41.6%. The pulse energy and peak power were calculated to be 22.4 nJ and 69.2 kW. By optimizing the cavity design, the shortest pulse duration of 188 fs was achieved at the central wavelength of 1026.8 nm. In this case, the maximum average output power of 0.77 W was generated with a slope efficiency of 27.1%. The experimental results show the excellent potential of Yb:LGGG crystal for high-efficiency and high-peak-power femtosecond laser.