40-fs Yb3+:CaGdAlO4 laser pumped by a single-mode 350-mW laser diode.
40-fs Yb3+:CaGdAlO4 laser pumped by a single-mode 350-mW laser diode.
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DOI：
10.1364/oe.20.010077
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发表时间：
2012-04
期刊：
影响因子：
3.8
通讯作者：
A. Agnesi;A. Greborio;F. Pirzio;G. Reali;J. Aus der Au;A. Guandalini
中科院分区：
文献类型：
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作者：
A. Agnesi;A. Greborio;F. Pirzio;G. Reali;J. Aus der Au;A. Guandalini
本文报道了Yb（3+）：CaGdAlO（4）被动锁模激光器的研究结果。这种特殊的泵浦源允许用接近TEM（00）的光束和最小的热负载进行有效泵浦，使得锁模性能的优化比用更高功率的多模光束更直接。事实上，使用半导体可饱和吸收镜和腔外色散补偿，短至40 fs（31 nm光谱）的脉冲已被测量，可调谐跨越20 nm，15 mW的输出功率。使用不同的可饱和吸收镜，直接从振荡器获得了33 mW输出功率的稍长的傅里叶限制46 fs脉冲。这样的整体性能，特别是考虑到这些是二极管泵浦镱激光器中产生的最短脉冲，证实了Yb（3+）：CaGdAlO（4）的优异品质。
We report the results of the investigation on a passively mode-locked Yb(3+):CaGdAlO(4) laser, pumped by a single transverse mode laser diode emitting 350 mW at 980 nm. This particular pump source allows efficient pumping with a nearly TEM(00) beam and minimal thermal load, making the optimization of the mode-locking performance more straightforward than with higher-power multimode beams. Indeed, using a semiconductor saturable absorber mirror and extra-cavity dispersion compensation, pulses as short as 40 fs (31-nm spectrum) have been measured, tunable across 20 nm with 15-mW output power. Slightly longer Fourier-limited 46-fs pulses with 33 mW output power directly from the oscillator have been achieved, using a different saturable absorber mirror. Such overall performance, especially considering these are among the shortest pulses generated in diode-pumped ytterbium lasers, confirms the excellent qualities of Yb(3+):CaGdAlO(4).