Opt Lett. 2013 Nov 15;38(22):4679-82. doi: 10.1364/OL.38.004679.
We report on supercontinuum generation (SG) in a hexagonal lattice tellurite photonic crystal fiber (PCF). The fiber has a regular lattice with a lattice constant Λ = 2 μm, linear filling factor d/Λ = 0.75, and a solid core 2.7 μm in diameter. Dispersion, calculated from scanning electron microscope (SEM) image of drawn fiber, has zero dispersion wavelength (ZDW) at 1410 and 4236 nm with a maximum of 193 ps/nm/km at 2800 nm. Under pumping with 150 fs/36 nJ/1580 nm pulses, supercontinuum spectrum in a bandwidth from 800 nm to over 2500 nm was observed in a 2 cm long PCF sample, which is comparable to results reported for suspended core tellurite PCFs pumped at wavelengths over 1800 nm. Measured spectrum is analyzed numerically with good agreement, and observed spectral broadening is interpreted. To our best knowledge, tellurite glass, regular lattice PCFs for successful SG in this bandwidth have not been reported before.
我们报告了在六方晶格碲酸盐光子晶体光纤（PCF）中产生超连续谱（SG）的情况。该光纤具有规则的晶格，晶格常数Λ=2μm，线性填充因子 d/Λ=0.75，以及直径为 2.7μm 的实心芯。从拉丝光纤的扫描电子显微镜（SEM）图像计算得出的色散，在 1410nm 和 4236nm 处具有零色散波长（ZDW），在 2800nm 处的最大色散为 193 ps/nm/km。在 150fs/36nJ/1580nm 脉冲的泵浦下，在 2cm 长的 PCF 样品中观察到带宽从 800nm 到 2500nm 以上的超连续谱，这与在 1800nm 以上波长泵浦的悬浮芯碲酸盐 PCF 报告的结果相当。测量的光谱与数值分析吻合良好，并解释了观察到的光谱展宽。据我们所知，在这个带宽内成功产生超连续谱的碲酸盐玻璃、规则晶格 PCF 以前尚未有报道。
