Maurice Vincent, Newman Zachary L, Dickerson Susannah, Rivers Morgan, Hsiao James, Greene Phillip, Mescher Mark, Kitching John, Hummon Matthew T, Johnson Cort
Opt Express. 2020 Aug 17;28(17):24708-24720. doi: 10.1364/OE.396296.
Optical frequency standards, or lasers stabilized to atomic or molecular transitions, are widely used in length metrology and laser ranging, provide a backbone for optical communications and lie at the heart of next-generation optical atomic clocks. Here we demonstrate a compact, low-power optical frequency reference based on the Doppler-free, two-photon transition in rubidium-87 at 778 nm implemented on a micro-optics breadboard. Our optical reference achieves a fractional frequency instability of 2.9×10/ for averaging times τ less than 10 s, has a volume of ≈35 cm and operates on ≈450 mW of electrical power. The advanced optical integration presented here demonstrates a key step towards the development of compact optical clocks and the broad dissemination of SI-traceable wavelength references.
光学频率标准，即稳定于原子或分子跃迁的激光器，广泛应用于长度计量和激光测距，为光通信提供支撑，并处于下一代光学原子钟的核心地位。在此，我们展示了一种基于87铷在778纳米处无多普勒双光子跃迁的紧凑型、低功率光学频率参考装置，该装置在微型光学实验板上实现。我们的光学参考装置在平均时间τ小于10秒时实现了2.9×10⁻¹⁰的分数频率不稳定度，体积约为35立方厘米，功耗约为450毫瓦。这里展示的先进光学集成技术是朝着紧凑型光学时钟的发展以及可溯源到国际单位制（SI）的波长参考的广泛传播迈出的关键一步。
