Jamatia Purniya, Saini Than Singh, Kumar Ajeet, Sinha Ravindra Kumar
Appl Opt. 2016 Aug 20;55(24):6775-81. doi: 10.1364/AO.55.006775.
A composite photonic crystal fiber structure has been designed with tellurite as the cladding and chalcogenide as a core material. To increase nonlinearity, rods of the chalcogenide glass material have been inserted around the core region. The reported structure offers very high nonlinearity of 1042 W Km at 2800 nm pump wavelength with low and flattened dispersion of approximately -11 ps·nm Km. An effective mode area of 6.46 μm of the propagating mode has been achieved as at pump wavelength. Such a highly nonlinear composite photonic crystal fiber structure is a potential candidate for nonlinear applications, such as slow-light and supercontinuum generation. Pumping at 2800 nm results in a supercontinuum spectrum spanning 0.5-4.7 μm using 8 mm long photonic crystal fiber pumped with femtosecond laser pulses with peak power of 3 kW.
一种复合光子晶体光纤结构已被设计出来，其包层采用碲酸盐，纤芯材料采用硫族化物。为了增加非线性，硫族化物玻璃材料的棒状物已被插入纤芯区域周围。所报道的结构在2800 nm泵浦波长下具有1042 W·Km的非常高的非线性，且具有约 -11 ps·nm·Km的低且平坦的色散。在泵浦波长下，传播模式的有效模面积达到了6.46 μm²。这种高度非线性的复合光子晶体光纤结构是诸如慢光和超连续谱产生等非线性应用的潜在候选者。使用峰值功率为3 kW的飞秒激光脉冲泵浦8 mm长的光子晶体光纤，在2800 nm处泵浦会产生跨越0.5 - 4.7 μm的超连续谱。
