Phase-coherent asynchronous optical sampling system
Optics
2020-12-30 v1 Instrumentation and Detectors
Abstract
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 {\mu}m, 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.
Cite
@article{arxiv.2008.02989,
title = {Phase-coherent asynchronous optical sampling system},
author = {Honglei Yang and Shengkang Zhang and Huan Zhao and Jun Ge},
journal= {arXiv preprint arXiv:2008.02989},
year = {2020}
}