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Spectrally sparse optical coherence tomography
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DOI：10.1364/OE.409539.png)
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Abstract
En 中文
Swept-source optical coherence tomography (OCT) typically relies on expensive and complex swept-source lasers, the cost of which currently limits the suitability of OCT for new applications. In this work, we demonstrate spectrally sparse OCT utilizing randomly spaced low-bandwidth optical chirps, suitable for low-cost implementation with telecommunications grade devices. Micron scale distance estimation accuracy with a resolution of 40 mu m at a standoff imaging distance greater than 10 cm is demonstrated using a stepped chirp approach with approximately 23% occupancy of 4 THz bandwidth. For imaging of sparse scenes, comparable performance to full bandwidth occupancy is verified for metallic targets. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Keywords:
FREQUENCY-DOMAIN REFLECTOMETRY
HIGH-SPEED
SWEPT-SOURCE
LOW-COST
LASER
DESIGN
SYSTEM
RADAR