Burst-mode thulium all-fiber laser delivering femtosecond pulses at a 1 GHz intra-burst repetition rate
Burst-mode thulium all-fiber laser delivering femtosecond pulses at a 1 GHz intra-burst repetition rate
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DOI：
10.1364/ol.42.003808
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发表时间：
2017-10-01
期刊：
影响因子：
3.6
通讯作者：
Ilday, F. Omer
中科院分区：
文献类型：
--
作者：
Elahi, Parviz;Kalaycioglu, Hamit;Ilday, F. Omer
据我们所知，我们报告了第一个超快突发模式激光系统的开发情况，该系统的中心波长约为2 μ m，其中水的吸收率以及大多数生物组织的吸收率非常高。该激光器包括谐波锁模的1 GHz振荡器，该振荡器又作为光纤放大器链的种子。放大器产生500 ns长的脉冲群，包含500个脉冲，分别具有1 GHz的脉冲群内和50 kHz的脉冲群间重复率，平均功率为1 W，分别对应于40 nJ脉冲和20 μ J的脉冲群能量。整个系统采用全光纤架构，并实现色散管理，因此输出脉冲直接从单模光纤传输，持续时间为340 fs，无需任何外部压缩。该千兆赫兹重复率系统预期用于2 μ m波长范围内的烧蚀冷却激光材料去除，由于在该波长下组织吸收特别高，这对激光手术很有意义。(C)2017美国光学学会
We report on the development of, to the best of our knowledge, the first ultrafast burst-mode laser system operating at a central wavelength of approximately 2 mu m, where water absorption and, consequently, the absorption of most biological tissue is very high. The laser comprises a harmonically mode-locked 1-GHz oscillator, which, in turn, seeds a fiber amplifier chain. The amplifier produces 500 ns long bursts containing 500 pulses with 1 GHz intra-burst and 50 kHz inter-burst repetition rates, respectively, at an average power of 1 W, corresponding to 40 nJ pulse and 20 mu J burst energies, respectively. The entire system is built in an all-fiber architecture and implements dispersion management such that output pulses are delivered directly from a single-mode fiber with a duration of 340 fs without requiring any external compression. This gigahertzrepetition-rate system is intended for ablation-cooled laser material removal in the 2 mu m wavelength region, which is interesting for laser surgery due to the exceptionally high tissue absorption at this wavelength. (C) 2017 Optical Society of America