Laser-diode pumped self-mode-locked praseodymium visible lasers with multi-gigahertz repetition rate.
Laser-diode pumped self-mode-locked praseodymium visible lasers with multi-gigahertz repetition rate.
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DOI：
10.1364/ol.41.002692
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发表时间：
2016-06
期刊：
影响因子：
3.6
通讯作者：
Yuxia Zhang;Haohai Yu;Huaijin Zhang;A. Di Lieto;M. Tonelli;Ji-yang Wang
中科院分区：
文献类型：
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作者：
Yuxia Zhang;Haohai Yu;Huaijin Zhang;A. Di Lieto;M. Tonelli;Ji-yang Wang
We demonstrate efficient laser-diode pumped multi-gigahertz (GHz) self-mode-locked praseodymium (Pr3+) visible lasers with broadband spectra from green to deep red for the first time to our knowledge. With a Pr3+-doped GdLiF4 crystal, stable self-mode-locked visible pulsed lasers at the wavelengths of 522 nm, 607 nm, 639 nm, and 720 nm have been obtained with the repetition rates of 2.8 GHz, 3.1 GHz, 3.1 GHz, and 3.0 GHz, respectively. The maximum output power was 612 mW with the slope efficiency of 46.9% at 639 nm. The mode-locking mechanism was theoretically analyzed. The stable second-harmonic mode-locking with doubled repetition frequency was also realized based on the Fabry-Perot effect formed in the laser cavity. In addition, we find that the polarization directions were turned with lasing wavelengths. This work may provide a new way for generating efficient ultrafast pulses with high- and changeable-repetition rates in the visible range.
