Optical nonlinearity can be enhanced by the combination of highly nonlinear chalcogenide glass and photonic crystal waveguides (PCWs) providing strong optical confinement and slow-light effects. In a Ag-As_2Se_3 chalcogenide PCW, the effective nonlinear parameter γeff reaches 6.3 × 10^4 W^-1m^-1, which is 200 times larger than that in Si photonic wire waveguides. In this paper, we report the detailed design, fabrication process, and the linear and nonlinear characteristics of this waveguide at silica fiber communication wavelengths. We show that the waveguide exhibits negligible two-photon absorption, and also high-efficiency self-phase modulation and four-wave mixing, which are assisted by low-dispersion slow light.
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机译:通过高度非线性硫族化物玻璃和光子晶体波导(PCWS)的组合可以增强光学非线性,提供强光学限制和慢速效果。在AG-AS_2SE_3硫族化物PCW中,有效的非线性参数γEFF达到6.3×10 ^ 4 W ^ -1m ^ -1,这比Si光子线波导的200倍。在本文中,我们报告了在二氧化硅纤维通信波长下该波导的详细设计,制造工艺和线性和非线性特性。我们表明波导表现出可忽略不计的二光子吸收,以及高效的自相调制和四波混合,通过低分散慢光辅助。
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