Duchesne David, Ferrera Marcello, Razzari Luca, Morandotti Roberto, Little Brent E, Chu Sai T, Moss David J
INRS-EMT, 1650 Boulevard Lionel Boulet, Varennes, Québec, Canada.
Opt Express. 2009 Feb 2;17(3):1865-70. doi: 10.1364/oe.17.001865.
We demonstrate efficient self phase modulation, as well as negligible nonlinear absorption, in low loss (<0.06 dB/cm), high index silica glass-based waveguides. Using approximately 1 ps pulses near 1560 nm we achieve a 1.5pi nonlinear phase shift in an integrated 45 cm long spiral waveguide with <60 W of peak input power, corresponding to a large nonlinearity (gamma) of 220 W(-1)km(-1). Further, we observe negligible nonlinear absorption for input intensities > 25 GW/cm(2). The high nonlinearity and low linear and nonlinear losses of these waveguides make them promising for nonlinear all-optical signal processing applications.
我们在低损耗（<0.06 dB/cm）、高折射率的基于石英玻璃的波导中展示了高效的自相位调制以及可忽略不计的非线性吸收。使用波长接近1560 nm的约1 ps脉冲，我们在长度为45 cm的集成螺旋波导中，通过小于60 W的峰值输入功率实现了1.5π的非线性相位偏移，对应的大非线性系数（γ）为220 W⁻¹km⁻¹。此外，我们观察到对于输入强度>25 GW/cm²，非线性吸收可忽略不计。这些波导的高非线性以及低线性和非线性损耗使其在非线性全光信号处理应用中具有广阔前景。
