Eckner William J, Young Aaron W, Schine Nathan, Kaufman Adam M
JILA, University of Colorado and National Institute of Standards and Technology, and Department of Physics, University of Colorado, Boulder, Colorado 80309, USA.
Rev Sci Instrum. 2021 Sep 1;92(9):093001. doi: 10.1063/5.0057619.
We present a continuous-wave, 810 nm laser with watt-level powers. Our system is based on difference-frequency generation of 532 and 1550 nm fiber lasers in a single pass through periodically poled lithium niobate. We measure the broadband spectral noise and relative intensity noise to be compatible with off-resonant dipole trapping of ultracold atoms. Given the large bandwidth of the fiber amplifiers, the output can be optimized for a range of wavelengths, including the strontium clock-magic-wavelength of 813 nm. Furthermore, with the exploration of more appropriate nonlinear crystals, we believe that there is a path toward scaling this proof-of-principle design to many watts of power and that this approach could provide a robust, rack-mountable trapping laser for future use in strontium-based optical clocks.
我们展示了一种具有瓦级功率的连续波810纳米激光器。我们的系统基于532纳米和1550纳米光纤激光器在单次通过周期性极化铌酸锂时产生的差频。我们测量了宽带光谱噪声和相对强度噪声，以使其与超冷原子的非共振偶极阱兼容。鉴于光纤放大器的带宽很大，输出可以针对一系列波长进行优化，包括813纳米的锶钟魔术波长。此外，随着对更合适的非线性晶体的探索，我们相信有一条途径可以将这种原理验证设计扩展到多瓦功率，并且这种方法可以提供一种坚固的、可机架安装的捕获激光器，供未来用于基于锶的光钟。
