Microresonator soliton dual-comb imaging
- Creators
- Bao, Chengying
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Suh, Myoung-Gyun
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Vahala, Kerry
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-Q 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 fill rates 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.
Additional Information
© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. Received 8 April 2019; revised 5 July 2019; accepted 24 July 2019 (Doc. ID 364448); published 27 August 2019. The authors thank Taeyoon Jeon and Chengmingyue Li for helpful discussions on the flow-cell experiment. C. B. gratefully acknowledges support from a Postdoctoral Fellowship from the Resnick Institute at Caltech. Funding: Air Force Office of Scientific Research (FA9550-18-1-0353); Resnick Sustainability Institute for Science, Energy and Sustainability, California Institute of Technology.Attached Files
Published - optica-6-9-1110.pdf
Submitted - 1809.09766.pdf
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Additional details
- Eprint ID
- 91339
- Resolver ID
- CaltechAUTHORS:20181129-145913477
- Air Force Office of Scientific Research (AFOSR)
- FA9550-18-1-0353
- Resnick Sustainability Institute
- Created
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2018-11-29Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field
- Caltech groups
- Kavli Nanoscience Institute, Resnick Sustainability Institute