Microresonator soliton dual-comb imaging
Abstract
Fast-responding detector arrays are commonly used for imaging rapidly-changing scenes. Besides array detectors, a single-pixel detector combined with a broadband optical spectrum can also be used for rapid imaging by mapping the spectrum into a spatial coordinate grid and then rapidly measuring the spectrum. Here, optical frequency combs generated from high- silica microresonators are used to implement this method. The microcomb is dispersed in two spatial dimensions to measure a test target. The target-encoded spectrum is then measured by multi-heterodyne beating with another microcomb having a slightly different repetition rate, enabling an imaging frame rate up to 200 kHz and fillrates as high as 48 MegaPixels/s. The system is used to monitor the flow of microparticles in a fluid cell. Microcombs in combination with a monolithic waveguide grating array imager could greatly magnify these results by combining the spatial parallelism of detector arrays with spectral parallelism of optics.
Cite
@article{arxiv.1809.09766,
title = {Microresonator soliton dual-comb imaging},
author = {Chengying Bao and Myoung-Gyun Suh and Kerry Vahala},
journal= {arXiv preprint arXiv:1809.09766},
year = {2019}
}
Comments
Chengying Bao and Myoung-Gyun Suh contribute equally