Li Yu, Poon Andrew W
Opt Express. 2015 Jan 12;23(1):360-72. doi: 10.1364/OE.23.000360.
We propose and demonstrate active resonance wavelength stabilization for silicon microring resonators with an in-resonator defect-state-absorption (DSA)-based photodetector (PD) for optical interconnects. We integrate an electro-optic (EO) tuner and a thermo-optic (TO) tuner on the microring, which are both feedback-controlled following a photocurrent threshold-detection method. Our BF(2)-ion-implanted DSA-based PIN PD exhibits a cavity-enhanced sub-bandgap responsivity at 1550 nm of 3.3 mA/W upon -2 V, which is 550-fold higher than that exhibited by an unimplanted PIN diode integrated on the same microring. Our experiment reveals active stabilization of the resonance wavelength within a tolerance of 0.07 nm upon a step increment of the stage temperature by 7 °C. Upon temperature modulations between 23 °C and 32 °C and between 18 °C and 23 °C, the actively stabilized resonance exhibits a transmission power fluctuation within 2 dB. We observe open eye diagrams at a data transmission rate of up to 30 Gb/s under the temperature modulations.
我们提出并展示了用于硅微环谐振器的有源谐振波长稳定技术，该谐振器带有用于光互连的基于谐振器缺陷态吸收（DSA）的光电探测器（PD）。我们在微环上集成了一个电光（EO）调谐器和一个热光（TO）调谐器，二者均采用光电流阈值检测方法进行反馈控制。我们基于BF(2)离子注入DSA的PIN PD在-2V电压下，在1550nm处表现出3.3mA/W的腔增强亚带隙响应率，这比集成在同一微环上的未注入PIN二极管的响应率高550倍。我们的实验表明，当平台温度逐步升高7°C时，谐振波长可在0.07nm的容差范围内实现有源稳定。在23°C至32°C以及18°C至23°C之间进行温度调制时，有源稳定的谐振表现出2dB以内的传输功率波动。我们在温度调制下观察到高达30Gb/s的数据传输速率下的张开眼图。
