Open AccessSpectrally sparse optical coherence tomography
Author(s) -
Okan Atalar,
David S. Millar,
Pu Wang,
Toshiaki KoikeAkino,
K. Kojima,
Phillip V. Orlik,
Kieran Parsons
Publication year - 2020
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.409539
Subject(s) - optical coherence tomography , optics , bandwidth (computing) , computer science , coherence (philosophical gambling strategy) , chirp , terahertz radiation , laser , tomography , telecommunications , physics , quantum mechanics
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 μm 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.