Ahmad H, Aidit S N, Ooi S I, Samion M Z, Wang S, Wang Y, Sahu J K, Zamzuri A K
Photonics Research Centre, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Physics Department, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Sci Rep. 2021 Mar 18;11(1):6356. doi: 10.1038/s41598-021-85423-y.
In this work, a Figure-9 (F9) bismuth-doped fiber laser (BiDFL) operating in the dissipative soliton resonance (DSR) regime is presented. The 1338 nm laser used a BiDF as the active gain medium, while a nonlinear amplifying loop mirror (NALM) in an F9 configuration was employed to obtain high energy mode-locked pulses. The wave breaking-free rectangular pulse widened significantly in the time domain with the increase of the pump power while maintaining an almost constant peak power of 0.6 W. At the maximum pump power, the mode-locked laser delivered a rectangular-shaped pulse with a duration of 48 ns, repetition rate of 362 kHz and a radio-frequency signal-to-noise ratio of more than 60 dB. The maximum output power was recorded at around 11 mW with a corresponding pulse energy of 30 nJ. This is, to the best of the author's knowledge, the highest mode-locked pulse energy obtained at 1.3 μm as well as the demonstration of an NALM BiDFL in a F9 configuration.
在这项工作中，展示了一种工作在耗散孤子共振（DSR） regime的图9（F9）铋掺杂光纤激光器（BiDFL）。1338nm激光器使用铋掺杂光纤作为有源增益介质，同时采用F9配置的非线性放大环形镜（NALM）来获得高能量锁模脉冲。随着泵浦功率的增加，无波破裂的矩形脉冲在时域中显著变宽，同时保持几乎恒定的0.6W峰值功率。在最大泵浦功率下，锁模激光器输出持续时间为48ns、重复频率为362kHz且射频信噪比超过60dB的矩形脉冲。最大输出功率记录在约11mW，相应的脉冲能量为30nJ。据作者所知，这是在1.3μm处获得的最高锁模脉冲能量，也是F9配置的NALM BiDFL的演示。
