400 Hz Volume Rate Swept-Source Optical Coherence Tomography at 1060 nm Using a KTN Deflector

Jiménez, Alejandro Martínez; Grelet, Sacha; Tsatourian, Veronika; Montague, Patrick Bowen; Bradu, Adrian; Podoleanu, Adrian Gh.

doi:10.1109/lpt.2022.3212015

Cited by 8 publications

(3 citation statements)

References 15 publications

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“…A 40 MHz swept source was developed using time stretch combined with all-normal dispersion (ANDi) supercontinuum dynamics [6]. Using this source, OCT imaging at high speed was demonstrated [5,7]. However, the output power of the swept source was limited due to the high losses in the stretcher and a regenerative ytterbium dopped fiber amplifier was needed.…”

Section: Introductionmentioning

confidence: 99%

Towards sub-5 µm axial resolution OCT from a multi-MHz swept source

Grelet

Montague

Podoleanu

2023

High-Speed Biomedical Imaging and Spectroscopy VIII

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We present an ultrafast swept source for optical coherence tomography (OCT) at a central wavelength of 1050 nm with a 86 nm bandwidth. Based on low noise supercontinuum dynamics and time stretch, this akinetic swept source operates at 10 MHz. The fast sweep rate and the low noise of the source enable high-speed imaging at a wavelength suitable for biological tissue (eye, skin). Such a light source presents a significant potential in achieving a large bandwidth beyond the limitations of current high-speed swept-source technologies.

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Section: Introductionmentioning

confidence: 99%

Towards sub-5 µm axial resolution OCT from a multi-MHz swept source

Grelet

Montague

Podoleanu

2023

High-Speed Biomedical Imaging and Spectroscopy VIII

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“…To tackle this issue, we investigate the use of a fast lateral scanner based on a KTN crystal. 2 Paired with a 40 MHz swept-source previously developed, a 400 Hz volume production rate is demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Dual ultrahigh speed swept-source and time domain optical coherence tomography system using a time stretch laser and a KTN deflector

Martínez Jiménez,

Grelet,

Bowen Montague

et al. 2023

Optical Coherence Imaging Techniques and Imaging in Scattering Media V

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We present an ultrahigh-speed swept source optical coherence tomography (SS-OCT) system that allows a volume rate of 400 Hz paired with a time domain (TD) subsystem. For the SS-OCT, a 40 MHz swept source is used, while for the TD-OCT, a broadband source. Both systems employ a scanning system that consists of a KTN scanner paired with a galvoscanner. The KTN crystal scans the beam laterally at 100 kHz. This allows B-scan OCT repetition rate, while with the galvoscanner 200 lines are obtained at 400 Hz in the en-face display of both SS-OCT and TD-OCT systems.

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“…Additionally, in such systems, balanced detection to suppress the noise of the light source is more difficult to implement due to the need to secure pixel-to-pixel correspondence between two 2D cameras. This is not an issue for SS-OCT. SS-OCT is more attractive due to its simplified set-up that can also achieve high volume rates (400 Hz) without impacting the sensitivity [ 11 , 12 ]. Performances of SS-OCT depend principally on the wavelength tunable light source used for imaging.…”

Section: Introductionmentioning

confidence: 99%

828 kHz retinal imaging with an 840 nm Fourier domain mode locked laser

Klufts,

Jiménez,

Lotz

et al. 2023

Biomed. Opt. Express

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This paper presents a Fourier domain mode locked (FDML) laser centered around 840 nm. It features a bidirectional sweep repetition rate of 828 kHz and a spectral bandwidth of 40 nm. An axial resolution of ∼9.9 µm in water and a 1.4 cm sensitivity roll-off are achieved. Utilizing a complex master-slave (CMS) recalibration method and due to a sufficiently high sensitivity of 84.6 dB, retinal layers of the human eye in-vivo can be resolved during optical coherence tomography (OCT) examination. The developed FDML laser enables acquisition rates of 3D-volumes with a size of 200 × 100 × 256 voxels in under 100 milliseconds. Detailed information on the FDML implementation, its challenging design tasks, and OCT images obtained with the laser are presented in this paper.

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400 Hz Volume Rate Swept-Source Optical Coherence Tomography at 1060 nm Using a KTN Deflector

Cited by 8 publications

References 15 publications

Towards sub-5 µm axial resolution OCT from a multi-MHz swept source

Towards sub-5 µm axial resolution OCT from a multi-MHz swept source

Dual ultrahigh speed swept-source and time domain optical coherence tomography system using a time stretch laser and a KTN deflector

828 kHz retinal imaging with an 840 nm Fourier domain mode locked laser

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