Salem Reza, Jiang Zack, Liu Dongfeng, Pafchek Robert, Gardner David, Foy Paul, Saad Mohammed, Jenkins Doug, Cable Alex, Fendel Peter
Opt Express. 2015 Nov 30;23(24):30592-602. doi: 10.1364/OE.23.030592.
A nearly two-octave wide coherent mid-infrared supercontinuum is demonstrated in a dispersion-engineered step-index indium fluoride fiber pumped near 2 µm. The pump source is an all-fiber femtosecond laser with 100 fs pulse width, 570 mW average power and 50 MHz repetition rate. The supercontinuum spectrum spans from 1.25 µm to 4.6 µm. Numerical modelling of the supercontinuum spectra show good agreement with the measurements. The coherence of the supercontinuum is calculated using a numerical model and shows a high degree of coherence across the generated bandwidth allowing it to be used for frequency comb applications.
在色散工程化的阶跃折射率氟化铟光纤中，通过在近2 µm波长处泵浦，展示出了一个近两个倍频程宽的相干中红外超连续谱。泵浦源是一台全光纤飞秒激光器，脉冲宽度为100 fs，平均功率为570 mW，重复频率为50 MHz。超连续谱范围从1.25 µm到4.6 µm。超连续谱的数值模拟结果与测量结果吻合良好。利用数值模型计算了超连续谱的相干性，结果表明在整个产生的带宽内具有高度的相干性，使其可用于频率梳应用。
