Ruddell S K, Webb K E, Takahata M, Kato S, Aoki T
Opt Lett. 2020 Sep 1;45(17):4875-4878. doi: 10.1364/OL.396725.
We demonstrate the fabrication of ultra-low-loss, all-fiber Fabry-Perot cavities that contain a nanofiber section, optimized for cavity quantum electrodynamics. By continuously monitoring the finesse and fiber radius during the fabrication of a nanofiber between two fiber Bragg gratings, we were able to precisely evaluate taper transmission as a function of radius. The resulting cavities have an internal round-trip loss of only 0.31% at a nanofiber waist radius of 207 nm, with a total finesse of 1380, and a maximum expected internal cooperativity of ∼1050 for a cesium atom on the nanofiber surface. Our ability to fabricate such high-finesse nanofiber cavities may open the door for the realization of high-fidelity scalable quantum networks.
我们展示了用于腔量子电动力学的、包含纳米纤维段的超低损耗全光纤法布里 - 珀罗腔的制造方法。通过在两个光纤布拉格光栅之间制造纳米纤维的过程中持续监测精细度和光纤半径，我们能够精确评估作为半径函数的锥度传输。所得的腔在纳米纤维腰部半径为207纳米时，内部往返损耗仅为0.31%，总精细度为1380，对于纳米纤维表面的铯原子，最大预期内部协同性约为1050。我们制造这种高精细度纳米纤维腔的能力可能为实现高保真可扩展量子网络打开大门。
