Jayatilleka Hasitha, Murray Kyle, Guillén-Torres Miguel Ángel, Caverley Michael, Hu Ricky, Jaeger Nicolas A F, Chrostowski Lukas, Shekhar Sudip
Opt Express. 2015 Sep 21;23(19):25084-97. doi: 10.1364/OE.23.025084.
We demonstrate that n-doped resistive heaters in silicon waveguides show photoconductive effects with high responsivities. These photoconductive heaters, integrated into microring resonator (MRR)-based filters, were used to automatically tune and stabilize the filter's resonance wavelength to the input laser's wavelength. This is achieved without requiring dedicated defect implantations, additional material depositions, dedicated photodetectors, or optical power tap-outs. Automatic wavelength stabilization of first-order MRR and second-order series-coupled MRR filters is experimentally demonstrated. Open eye diagrams were obtained for data transmission at 12.5 Gb/s while the temperature was varied by 5 °C at a rate of 0.28 °C/s. We theoretically show that series-coupled MRR-based filters of any order can be automatically tuned by using photoconductive heaters to monitor the light intensity in each MRR, and sequentially aligning the resonance of each MRR to the laser's wavelength.
我们证明，硅波导中的n型掺杂电阻加热器具有高响应度的光电导效应。这些集成到基于微环谐振器（MRR）的滤波器中的光电导加热器，用于自动将滤波器的谐振波长调谐并稳定到输入激光的波长。无需进行专门的缺陷注入、额外的材料沉积、专用光电探测器或光功率引出即可实现这一点。通过实验证明了一阶MRR和二阶串联耦合MRR滤波器的自动波长稳定。在温度以0.28°C/s的速率变化5°C的情况下，获得了12.5 Gb/s数据传输的开放眼图。我们从理论上表明，通过使用光电导加热器监测每个MRR中的光强度，并依次将每个MRR的谐振与激光波长对齐，可以自动调谐任何阶数的基于串联耦合MRR的滤波器。
