We have demonstrated a hybrid-integrated silicon photonic (SiPh) tunable laser in a miniaturized package suitable for coherent modules in small form factors such as OSFP and QSFP-DD. Through the integration of an in-house-designed high-power semiconductor optical amplifier (SOA), the developed SiPh laser has achieved a record-high output power of 21.5 dBm across the C-band. Also, this laser exhibits narrow linewidths down to 60 kHz, SMSR larger than 50 dB, low relative intensity noise below −150 dB/Hz, and a broad tuning range of 65 nm. These performance parameters are preferable for 400 Gb/s and beyond coherent communications using advanced high-order modulation formats. Moreover, an on-chip integrated sensor technology was developed for accurate laser frequency control. We have achieved 1 GHz frequency stability of SiPh laser against SOA current changes or package temperature variations between 10 °C and 80 °C. We further show the feasibility of this developed SiPh laser for 64 Gbaud, 16/64 QAM coherent transmission by integrating with an in-house InP-PLC hybrid coherent optical subassembly (COSA).

中文翻译：

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具有精确频率控制的高功率、窄线宽、小型化硅光子可调谐激光器

我们展示了一种采用小型化封装的混合集成硅光子 (SiPh) 可调谐激光器，适用于 OSFP 和 QSFP-DD 等小型相干模块。通过集成内部设计的高功率半导体光放大器 (SOA)，开发的 SiPh 激光器在 C 波段实现了创纪录的 21.5 dBm 输出功率。此外，该激光器具有低至 60 kHz 的窄线宽、大于 50 dB 的 SMSR、低于 -150 dB/Hz 的低相对强度噪声以及 65 nm 的宽调谐范围。这些性能参数更适用于使用高级高阶调制格式的 400 Gb/s 及以上的相干通信。此外，还开发了一种用于精确激光频率控制的片上集成传感器技术。我们已经实现了 SiPh 激光器在 10 °C 和 80 °C 之间针对 SOA 电流变化或封装温度变化的 1 GHz 频率稳定性。我们通过与内部 InP-PLC 混合相干光学组件 (COSA) 集成，进一步展示了这种开发的 SiPh 激光器用于 64 Gbaud、16/64 QAM 相干传输的可行性。