High-power graphene mode-locked Tm/Ho co-doped fiber laser with evanescent field interaction.
High-power graphene mode-locked Tm/Ho co-doped fiber laser with evanescent field interaction.
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DOI：
10.1038/srep16624
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发表时间：
2015-11-16
影响因子：
4.6
通讯作者：
Wang QJ
中科院分区：
文献类型：
--
作者：
Li X;Yu X;Sun Z;Yan Z;Sun B;Cheng Y;Yu X;Zhang Y;Wang QJ
中红外超快光纤激光器在化学和生物医学传感、材料加工和军事应用等各种应用中具有重要价值。在此，我们报道了全光纤高功率石墨烯锁模Tm/Ho共掺光纤激光器在长波长和倏逝场相互作用。在中心波长为1879.4 nm处产生了高达7.8 MHz的超快脉冲，脉冲宽度为4.7 ps。石墨烯吸收体与侧面抛光光纤的集成可以显著提高损伤阈值。当泵浦功率大于500 mW时，可实现谐波锁模，锁模频率可达21次谐波。通过在反常色散区使用一级放大器，激光可以被放大到450 mW，同时获得最窄的脉冲宽度为1.4 ps。我们的工作为石墨烯Tm/Ho共掺杂锁模全光纤主振荡器功率放大器作为高功率激光应用的潜在高效和经济的激光源铺平了道路，例如特殊材料加工和非线性光学研究。
Mid-infrared ultrafast fiber lasers are valuable for various applications, including chemical and biomedical sensing, material processing and military applications. Here, we report all-fiber high-power graphene mode-locked Tm/Ho co-doped fiber laser at long wavelength with evanescent field interaction. Ultrafast pulses up to 7.8 MHz are generated at a center wavelength of 1879.4 nm, with a pulse width of 4.7 ps. A graphene absorber integrated with a side-polished fiber can increase the damage threshold significantly. Harmonics mode-locking can be obtained till to the 21th harmonics at a pump power of above 500 mW. By using one stage amplifier in the anomalous dispersion regime, the laser can be amplified up to 450 mW and the narrowest pulse duration of 1.4 ps can be obtained simultaneously. Our work paves the way to graphene Tm/Ho co-doped mode-locked all-fiber master oscillator power amplifiers as potentially efficient and economic laser sources for high-power laser applications, such as special material processing and nonlinear optical studies.