硅光纤中的非线性吸收和自相位调制

P. Mehta, N. Healy, J. Sparks, T. Day, P. Sazio, J. Badding, A. Peacock
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引用次数: 0

摘要

硅光纤作为一种直接将半导体功能集成到光纤架构内的手段,为紧凑的全光信号处理提供了一个平台,引起了人们的极大兴趣。例如,核心材料的高光学非线性打开了这些光纤在非常短的设备长度中用于信号再生的潜力。本文描述了阶跃折射率氢化非晶硅(a- si:H)光纤的非线性光学特性,并演示了其在宽带自相位调制(SPM)中的应用。该纤维是用高压化学流体技术[1]制造的,将半导体沉积到硅毛细管的中心孔中。得到的光纤芯直径为6µm,长度为1.5cm,在1550nm处的线性传输损耗低至1.7dB/cm。由于材料损耗减少了有效的非线性相互作用长度,因此实现低损耗是观察这些过程的必要条件。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Nonlinear absorption and self-phase modulation in silicon optical fibres
Silicon optical fibres are generating much interest as a means to directly integrate semiconductor functionality within the fibre architecture to provide a platform for compact all optical signal processing. For example, the high optical nonlinearity of the core material opens up the potential for these fibres to be used for signal regeneration in very short device lengths. In this paper we characterise the nonlinear optical properties of a step index hydrogenated amorphous silicon (a-Si:H) optical fibre and demonstrate its use for broadband self-phase modulation (SPM). The fibre was fabricated using a high pressure chemical fluid technique [1] to deposit the semiconductor into the central hole of a silica capillary. The resulting fibre had a core diameter of 6µm and a length of 1.5cm, with the linear transmission losses measured to be as low as 1.7dB/cm at 1550nm. As the effective nonlinear interaction length is reduced by the material loss, the realization of low losses is a necessary requirement for the observation of these processes.
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