Várallyay Z, Saitoh K, Fekete J, Kakihara K, Koshiba M, Szipocs R
Furukawa Electric Institute of Technology Ltd, H-1158 Budapest, Hungary.
Opt Express. 2008 Sep 29;16(20):15603-16. doi: 10.1364/oe.16.015603.
Higher-order-mode solid and hollow core photonic bandgap fibers exhibiting reversed or zero dispersion slope over tens or hundreds of nanometer bandwidths within the bandgap are presented. This attractive feature makes them well suited for broadband dispersion control in femtosecond pulse fiber lasers, amplifiers and optical parametric oscillators. The canonical form of the dispersion profile in photonic bandgap fibers is modified by a partial reflector layer/interface placed around the core forming a 2D cylindrical Gires-Tournois type interferometer. This small perturbation in the index profile induces a frequency dependent electric field distribution of the preferred propagating higher-order-mode resulting in a zero or reversed dispersion slope.
本文介绍了高阶模式实心和空心光子带隙光纤，它们在带隙内的数十或数百纳米带宽上呈现反向或零色散斜率。这一吸引人的特性使其非常适合用于飞秒脉冲光纤激光器、放大器和光学参量振荡器中的宽带色散控制。光子带隙光纤中色散分布的标准形式通过围绕纤芯放置的部分反射层/界面进行修改，形成二维圆柱形吉雷斯 - 图诺干涉仪。折射率分布中的这种微小扰动会导致首选传播高阶模式的频率相关电场分布，从而产生零或反向色散斜率。
