Jiang Xin, Joly Nicolas Y, Finger Martin A, Babic Fehim, Pang Meng, Sopalla Rafal, Frosz Michael H, Poulain Samuel, Poulain Marcel, Cardin Vincent, Travers John C, St J Russell Philip
Opt Lett. 2016 Sep 15;41(18):4245-8. doi: 10.1364/OL.41.004245.
Photonic crystal fibers (PCFs) made from ZBLAN glass are of great interest for generating broadband supercontinua extending into the ultraviolet and mid-infrared regions. Precise sub-micrometer structuring makes it possible to adjust the modal dispersion over a wide range, making the generation of new frequencies more efficient. Here we report a novel ZBLAN PCF with six cores, each containing a central nanobore of a diameter ∼330 nm. Each nanobore core supports several guided modes, and the presence of the nanobore significantly modifies the dispersion, strongly influencing the dynamics and the extent of supercontinuum generation. Spectral broadening is observed when a single core is pumped in the fundamental and first higher order core modes with 200 fs long pulses at a wavelength of 1042 nm. Frequency-resolved optical gating is used to characterize the output pulses when pumping in the lowest order mode. The results are verified by numerical simulations.
由ZBLAN玻璃制成的光子晶体光纤（PCF）对于产生延伸至紫外和中红外区域的宽带超连续谱具有极大的吸引力。精确的亚微米结构使得在很宽的范围内调节模式色散成为可能，从而使新频率的产生更加高效。在此，我们报道了一种新型的具有六个芯的ZBLAN光子晶体光纤，每个芯包含一个直径约为330纳米的中心纳米孔。每个纳米孔芯支持多种导模，并且纳米孔的存在显著改变了色散，强烈影响超连续谱产生的动力学过程和范围。当用波长为1042纳米、脉宽为200飞秒的脉冲在基模和一阶高阶芯模中泵浦单个芯时，观察到了光谱展宽。当在最低阶模中泵浦时，使用频率分辨光学门控来表征输出脉冲。结果通过数值模拟得到了验证。
