Non-linear micro-ring resonators

非线性微环谐振器

• 批准号: 2278259
• 金额: --
• 依托单位: University of Southampton
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2278259
• 关键词: Non; linear; micro; ring; resonators

To be truly portable, an optical frequency comb must be generated using milliwatts of laser pump power. Commercial systems use few-100pJ pulses and complicated interferometric stabilization sometimes with amplified stages: this calls for the development of micro-combs based on efficient ultra-nonlinear optical waveguide micro-resonators that exhibit the Kerr effect. Tantalum Pentoxide waveguide system: Our approach involves use of an unconventional material. We shall fabricate tantalum pentoxide channel waveguides in-house, in a CMOS-compatible process. This material has a x(3) nonlinearity about 3x that of silicon nitride, a similarly high refractive index and we have demonstrated already low loss waveguides below 0.2 dB/cm. The waveguide geometry is tantalum pentoxide on top of silica on silicon which can be encapsulated in a silica or alumina layer; this configuration is flexible enough to allow customized dispersion profiles. Our main target shall be to engineer the dispersion and lower the losses of the waveguide system. We will design the dispersion of the high-Q micro-ring waveguides to achieve single soliton propagation from CW sources at the wavelength range between 1 and 2.1 um. The waveguide system will be pumped using our home-grown semiconductor quantum well lasers.

为了真正便携，光学频率梳必须使用毫瓦的激光泵浦功率产生。商业系统使用的是100pj以下的脉冲和复杂的干涉稳定，有时需要放大级：这就要求开发基于高效的超非线性光波导微谐振器的微梳，并表现出克尔效应。五氧化二钽波导系统：我们的方法涉及使用一种非常规材料。我们将在内部制造五氧化二钽通道波导，以cmos兼容的工艺。这种材料的非线性程度约为氮化硅的3倍，具有类似的高折射率，并且我们已经展示了低于0.2 dB/cm的低损耗波导。波导的几何形状是在硅上的二氧化硅上的五氧化二钽，其可以封装在二氧化硅或氧化铝层中；这个配置足够灵活，可以定制分散配置文件。我们的主要目标是设计波导系统的色散和降低损耗。我们将设计高q微环波导的色散，以实现连续波源在1 ~ 2.1 um波长范围内的单孤子传播。波导系统将使用我们自制的半导体量子阱激光器进行泵浦。