Mehta P, Healy N, Day T D, Sparks J R, Sazio P J A, Badding J V, Peacock A C
Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK.
Opt Express. 2011 Sep 26;19(20):19078-83. doi: 10.1364/OE.19.019078.
All-optical modulation based on degenerate and non-degenerate two-photon absorption (TPA) is demonstrated within a hydrogenated amorphous silicon core optical fiber. The nonlinear absorption strength is determined by comparing the results of pump-probe experiments with numerical simulations of the coupled propagation equations. Subpicosecond modulation is achieved with an extinction ratio of more than 4 dB at telecommunications wavelengths, indicating the potential for these fibers to find use in high speed signal processing applications.
基于简并和非简并双光子吸收（TPA）的全光调制在氢化非晶硅芯光纤中得到了验证。通过将泵浦 - 探测实验结果与耦合传播方程的数值模拟结果进行比较，确定了非线性吸收强度。在电信波长下实现了亚皮秒调制，消光比超过4 dB，这表明这些光纤在高速信号处理应用中具有应用潜力。
