Madden S J, Choi D-Y, Bulla D A, Rode A V, Luther-Davies B, Ta'eed V G, Pelusi M D, Eggleton B J
Opt Express. 2007 Oct 29;15(22):14414-21. doi: 10.1364/oe.15.014414.
We report on the fabrication and optical properties of etched highly nonlinear As(2)S(3) chalcogenide planar rib waveguides with lengths up to 22.5 cm and optical losses as low as 0.05 dB/cm at 1550 nm - the lowest ever reported. We demonstrate strong spectral broadening of 1.2 ps pulses, in good agreement with simulations, and find that the ratio of nonlinearity and dispersion linearizes the pulse chirp, reducing the spectral oscillations caused by self-phase modulation alone. When combined with a spectrally offset band-pass filter, this gives rise to a nonlinear transfer function suitable for all-optical regeneration of high data rate signals.
我们报道了蚀刻高度非线性的As₂S₃硫系化合物平面肋形波导的制备及其光学特性，该波导长度可达22.5厘米，在1550纳米处的光损耗低至0.05分贝/厘米——这是迄今报道的最低值。我们展示了1.2皮秒脉冲的强烈光谱展宽，与模拟结果吻合良好，并发现非线性与色散之比使脉冲啁啾线性化，减少了仅由自相位调制引起的光谱振荡。当与光谱偏移带通滤波器结合时，这会产生一个适用于高数据速率信号全光再生的非线性传递函数。
