Femtosecond Passively Er-Doped Mode-Locked Fiber Laser With WS2 Solution Saturable Absorber
Femtosecond Passively Er-Doped Mode-Locked Fiber Laser With WS2 Solution Saturable Absorber
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DOI：
10.1109/jstqe.2016.2538640
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发表时间：
2017
影响因子：
4.9
通讯作者：
Lu Li;Yulong Su;Yonggang Wang;Xi Wang;Yishan Wang;Xiao-hui Li;D. Mao;J. Si
中科院分区：
文献类型：
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作者：
Lu Li;Yulong Su;Yonggang Wang;Xi Wang;Yishan Wang;Xiao-hui Li;D. Mao;J. Si
本研究提出了带有 WS2 溶液可饱和吸收器 (SSA) 的飞秒基波和谐波锁模掺铒光纤激光器。 SA 是基于嵌入 WS2 纳米片溶液中的 D 形纤维 (DF) 制造的。该WS2溶液具有良好的抗氧化能力、优良的抗散射性、高散热性、高损伤阈值等优点。这种SA的调制深度为11%，可饱和强度Isat为5 MW/cm2，不可饱和损耗为18%。通过采用DF-WS2 SSA，实现了稳定的锁模光纤激光器，重复频率为10.2 MHz，脉冲持续时间为660 fs。在泵浦功率为 350 mW 时，还获得了 460.7 MHz 重复率谐波锁模 (HML) 操作，这对应于基本腔重复率的 45 次谐波。脉冲持续时间为710 fs，信噪比为66 dB，显示了SA HML光纤激光器的优异性能。结果表明，DF-WS2 解决方案可以作为超快非线性光学的潜在 SA。
This study presents the femtosecond fundamental and harmonic mode-locked Er-doped fiber laser with WS2 solution saturable absorber (SSA). The SA is fabricated based on a D-shaped fiber (DF) embedded in WS2 nanosheets solution. Such WS2 solution has virtues of good antioxidant capacity, excellent scattering resistance, high heat dissipation, and high damage threshold. This kind of SA shows a modulation depth of 11%, a saturable intensity Isat of 5 MW/cm2, and nonsaturable loss of 18%. By employing DF-WS2 SSA, a stable mode-locked fiber laser is achieved with repetition rate of 10.2 MHz and pulse duration of 660 fs. At the pump power of 350 mW, 460.7-MHz repetition rate harmonic mode-locking (HML) operation is also obtained, which corresponds to 45th harmonics of the fundamental cavity repetition rate. The pulse duration is 710 fs and signal-to-noise ratio is 66 dB, showing the excellent performance in HML fiber laser with SA. The results indicate that DF-WS2 solution can work as a potential SA for ultrafast nonlinear optics.