论文标题
激光动力学的优化用于主动稳定DF- vecsels的活跃稳定
Optimization of laser dynamics for active stabilization of DF--VECSELs dedicated to cesium CPT clocks
论文作者
论文摘要
我们报告了双伺服循环的实现和性能，以实现和相差的相差主动稳定，以在紧凑的原子钟的框架中，对cesium原子的相干种群捕获（CPT）的双频垂直外部 - 腔表面发射激光（DF-VECSEL）。在 - 相位完全相关的两个激光模式的泵送被确定为降低强度降噪的最佳方案，分析模型允许优化主动稳定策略。光学锁定到局部振荡器的节拍音符从载体处的100〜Hz处提高了低于-103〜DBC/Hz的相位噪声水平。预计对时钟短期频率稳定性的激光贡献与$σ_y= 5 \，\ times 10^{ - 13} $在一秒钟内与靶向的Allan偏差兼容。
We report the implementation and performance of a double servo-loop for intensity and phase-difference active stabilization of a dual-frequency vertical external--cavity surface-emitting laser (DF-VECSEL) for coherent population trapping (CPT) of cesium atoms in the framework of compact atomic clocks. In--phase fully correlated pumping of the two laser modes is identified as the best scheme for intensity noise reduction, and an analytical model allows the optimization of the active stabilization strategy. Optical phase-locking the beat-note to a local oscillator leads to a phase noise level below -103~dBc/Hz at 100~Hz from the carrier. The laser contribution to the short-term frequency stability of the clock is predicted to be compatible with a targeted Allan deviation below $σ_y = 5\,\times 10^{-13}$ over one second.
