论文标题
相位连接异步光学采样系统
Phase-coherent asynchronous optical sampling system
论文作者
论文摘要
相互相一致性是异步光学采样系统中最关键的因素，并且通常通过将两个飞秒激光器与共享狭窄的型型腔型激光器相循环来实现其增强。在这里，我们报告了一个系统，在傅立叶频带中，在1.55μm左右的傅立叶频带中，在0.04 rad的水平上，其水平为0.04 RAD，对应于30的正时抖动。残留相位抖动以0.06 Hz至0.1 Hz之间的傅立叶频率达到1 RAD，从中推断出至少10 s。在整个直接激光光谱频段中，多螺旋式击败实验揭示了约8.15 s的硬件相干时间。
Mutual phase coherence is the most crucial factor in asynchronous optical sampling system, and its enhancement is commonly achieved by phase-locking both femtosecond lasers to a shared narrow-linewidth cavity-stabilized laser. Here we report such a system with a low residual optical phase jitter at a level of 0.04 rad in a Fourier frequency band from 1 Hz to 5 MHz around 1.55 μm, corresponding to a timing jitter of 30 as. The residual phase jitter reaches 1 rad at a Fourier frequency between 0.06 Hz and 0.1 Hz, from which the phase-coherence time is inferred at least 10 s. The multi-heterodyne beats experimentally reveal a hardware-limited phase coherence time of ~8.15 s throughout the direct lasing spectral band.
