Journal
IEEE PHOTONICS JOURNAL
Volume 14, Issue 6, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOT.2022.3226820
Keywords
Optical fiber dispersion; Optical fibers; Optical fiber polarization; Bandwidth; Optical fiber amplifiers; Optical fiber devices; Fiber lasers; OCT; supercontinuum generation; fast imaging; swept source
Funding
- European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant [860807]
- UCL Institute of Ophtalmology - Moorfields Eye Hospital [BRC003]
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This study presents a light source based on a mode-locked laser and time stretch technique, which can be used for ultrafast swept-source optical coherence tomography (SS-OCT). The source has a high A-scan rate and axial resolution, and enables high-speed OCT without being bandwidth limited.
We present an akinetically swept light source based on a spectrally broadened mode-locked laser in all normal dispersion optical fiber followed by a linear dispersive time stretch and a regenerative amplification stage. Developed for ultrafast swept-source optical coherence tomography (SS-OCT), the source enables the demonstration of A-scan rate at 40 MHz with a 12 mu m axial resolution. Through A-scans captured from a fast-moving object, we demonstrate that high-speed OCT is possible at 1 mu m wavelength in an architecture which is not intrinsically bandwidth limited. The source therefore shows a promising route to achieving high axial resolution in high-speed swept-source OCT.
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