Ahmad H, Ruslan N E, Ismail M A, Reduan S A, Lee C S J, Sathiyan S, Sivabalan S, Harun S W
Appl Opt. 2016 Feb 10;55(5):1001-5. doi: 10.1364/AO.55.001001.
We demonstrate a Q-switched erbium-doped fiber laser using tungsten disulfide (WS₂) as a saturable absorber. The WS₂ is deposited onto fiber ferrules using a drop-casting method. Passive Q-switched pulses operating in the C-band region with a central wavelength of 1560.7 nm are successfully generated by a tunable pulse repetition rate ranging from 27.2 to 84.8 kHz when pump power is increased from 40 to 220 mW. At the same time, the pulse width decreases from a maximum value of 3.84 μs to a minimum value of 1.44 μs. The signal-to-noise ratio gives a stable value of 43.7 dB. The modulation depth and saturation intensity are measured to be 0.99% and 36.2 MW/cm², respectively.
我们展示了一种使用二硫化钨（WS₂）作为可饱和吸收体的调Q掺铒光纤激光器。采用滴铸法将WS₂沉积在光纤插芯上。当泵浦功率从40 mW增加到220 mW时，通过27.2至84.8 kHz的可调脉冲重复率，成功产生了中心波长为1560.7 nm的C波段被动调Q脉冲。同时，脉冲宽度从最大值3.84 μs减小到最小值1.44 μs。信噪比给出了43.7 dB的稳定值。测量得到的调制深度和饱和强度分别为0.99%和36.2 MW/cm²。
