AI 中文总结
研究展示了452nm超窄线宽自注入锁定DFB二极管激光器，通过与基于FBG的外腔耦合降低线宽，实验与理论吻合，还表征了调谐能力，其架构利于集成，可为集成光学原子钟和水下激光雷达提供关键的紧凑稳定且可调的可见光光源。
AI 中文摘要
在本工作中，我们展示了一种在452nm发射的超窄线宽自注入锁定分布反馈（DFB）二极管激光器，在光纤输出功率为11mW时实现了170Hz的本征线宽。得益于与基于光纤布拉格光栅（FBG）的外腔耦合，DFB激光器的线宽得以降低。实验结果与我们的自注入动力学理论模型高度吻合。此外，还对系统的调谐能力进行了表征，通过电流调制实现调谐，在600MHz的连续无模式跳变范围内调谐效率为300MHz/mA。这种架构为紧凑封装内的集成提供了一条稳健途径。最终，这种紧凑、稳定且频率可调的可见光光源对于集成光学原子钟和水下激光雷达应用至关重要。
英文摘要
In this work, we demonstrate an ultra-narrow linewidth self-injection locked distributed feedback (DFB) diode laser emitting at 452 nm, achieving an intrinsic linewidth of 170 Hz with a fiber output power of 11 mW. The linewidth reduction of the DFB laser is obtained thanks to the coupling with an external cavity based on a fiber Bragg grating (FBG). Experimental results demonstrate excellent agreement with our theoretical modeling of the self-injection dynamics. Furthermore, the tuning capabilities of the system are characterized, with tunability achieved via current modulation, yielding a tuning efficiency of 300 MHz/mA over a continuous mode-hop-free range of 600 MHz. This architecture offers a robust pathway toward an integration within a compact package. Ultimately, such compact, stable, and frequency-tunable visible light sources are key for integrated optical atomic clocks and underwater lidar application.
