Khegai Aleksandr, Melkumov Mikhail, Riumkin Konstantin, Khopin Vladimir, Firstov Sergei, Dianov Evgeny
Opt Lett. 2018 Mar 1;43(5):1127-1130. doi: 10.1364/OL.43.001127.
We demonstrate, to the best of our knowledge, the first bismuth-doped fiber laser operating at 1.7 μm mode-locked by means of Kerr nonlinearity. The laser setup has a figure-of-eight all-fiber design with a nonlinear amplifying loop mirror (NALM) and yields 17 ps pulses with a 3.57 MHz repetition rate and the energy 84 pJ. Using the master oscillator power amplifier scheme with a bismuth fiber amplifier, the output pulse energy of 5.7 nJ was achieved. Further pulse compression in the fiber compressor shortened pulses to 630 fs. The operation of the master oscillator was modeled using the nonlinear Schrödinger equation. Calculated data are in good agreement with experimental results.
据我们所知，我们首次展示了一种通过克尔非线性锁模工作在1.7μm的铋掺杂光纤激光器。该激光器装置采用带有非线性放大环镜（NALM）的八字形全光纤设计，产生重复频率为3.57MHz、能量为84pJ的17ps脉冲。采用带有铋光纤放大器的主振荡功率放大方案，实现了5.7nJ的输出脉冲能量。在光纤压缩器中进一步压缩脉冲，将脉冲缩短至630fs。使用非线性薛定谔方程对主振荡器的运行进行了建模。计算数据与实验结果吻合良好。
