论文标题
紧凑型子Hz线宽激光器通过自我喷射锁启用到亚ML FP腔
Compact sub-Hz Linewidth Laser Enabled by Self Injection Lock To a Sub-mL FP Cavity
论文作者
论文摘要
高频稳定性和较小外形的狭窄线宽激光器（NLL）对于在远程传感，量子信息和原子时钟的应用中至关重要。磅 - 杜斯大厅（PDH）锁（PDH）锁或自我喷射锁（SIL）已证明了种子激光器的各种高性能NLL，以实现超高质量因子（Q）的真空稳定的FP腔。但是，由于复杂的稳定系统和锁定电子设备，它们通常是复杂的实验室设置。在这里，我们报告的紧凑型NLL为68ml体积，通过二极管激光器的SIL实现，绕过桌子大小的vaccum vaccum，热和振动隔离。我们用自删除的杂尼系统表征了NLL，Lorentzian线宽达到60MHz，并且集成的线宽为〜80Hz。频率噪声性能超过了商业NLL的频率性能，以及SIL与高Q芯片环谐振器实现的最佳报道的混合综合NLL。我们的工作标志着利用超高Q FP腔的卓越性能迈出的陆战障碍NLL迈出的重要一步。
Narrow linewidth laser(NLL) of high frequency stability and small form factor is essential to enable applications in long range sensing, quantum information and atomic clocks. Various high performance NLL have been demonstrated by Pound-Drever Hall(PDH) lock or self injection lock(SIL) of a seed laser to a vaccum-stabilized FP cavity of ultrahigh quality factor(Q). However they are often complicated lab setups due to the sophisticated stabilizing system and locking electronics. Here we report a compact NLL of 68mL volume, realized by SIL of a diode laser to a miniature FP cavity of 7.7x108 Q and 0.5mL volume, bypassing table-size vaccum, thermal and vibration isolation. We characterized the NLL with a self-delayed heterodyne system, the Lorentzian linewidth reaches 60mHz, and the integrated linewidth is ~80Hz. The frequency noise performance exceeds that of commercial NLLs and the best reported hybrid-integrated NLL realized by SIL to high Q on-chip ring resonators. Our work marks a major step toward a field-deployable NLL of superior performance utilizing ultra-high Q FP cavity.
