4.5 Article

40 MHz Swept-Source Optical Coherence Tomography at 1060 nm Using a Time-Stretch and Supercontinuum Spectral Broadening Dynamics

期刊

IEEE PHOTONICS JOURNAL
卷 14, 期 6, 页码 -

出版社

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOT.2022.3226820

关键词

Optical fiber dispersion; Optical fibers; Optical fiber polarization; Bandwidth; Optical fiber amplifiers; Optical fiber devices; Fiber lasers; OCT; supercontinuum generation; fast imaging; swept source

资金

  1. European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant [860807]
  2. UCL Institute of Ophtalmology - Moorfields Eye Hospital [BRC003]

向作者/读者索取更多资源

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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