Development of 50 kHz Intravascular Swept Source Optical Coherence Tomographic System

Yu, 卢宇 Lu; Zhongliang, 李中梁 Li; Xiangzhao, 王向朝 Wang; Nan, 南楠 Nan; Xuan, 王瑄 Wang

doi:10.3788/cjl201744.0207001

Cited by 2 publications

(2 citation statements)

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“…Optical Coherence Tomography (OCT) is a non-invasive high-resolution tomography method that utilizes the low-coherence interference principle of light to image inside bio-logical tissue to be detected ( Huang et al, 1991 ). The combination of the endoscopy head and OCT has a wide range of applications, such as fundus retinal imaging ( Joos and Shen, 2013 ), vascular endoscopy imaging ( Yu et al, 2017 ), gastrointestinal endoscopy imaging ( Masci et al, 2009 ), and tooth root crack detection ( Wei et al, 2019 ) and other clinical applications, which can realize non-invasive living tissue high-resolution tomography imaging of human internal organs.…”

Section: Introductionmentioning

confidence: 99%

Design of an endoscopic OCT probe based on piezoelectric tube with quartered outside electrodes

Hu,

Wu,

Shi

et al. 2024

Front. Bioeng. Biotechnol.

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Introduction: Optical coherence tomography (OCT) is a pivotal imaging modality in ophthalmology for real-time, in vivo visualization of retinal structures. To enhance the capability and safety of OCT, this study focuses on the development of a micro intraocular OCT probe. The demand for minimal invasiveness and precise imaging drives the need for advanced probe designs that can access tight and sensitive areas, such as the ocular sclera.Methods: A novel OCT probe was engineered using a piezoelectric tube with quartered electrodes to drive Lissajous scanning movements at the end of a single-mode fiber. This design allows the probe to enter the eyeball through a scleral opening. Structural innovation enables the outer diameter of the endoscopic OCT probe to be adjusted from 13G (2.41 mm) to 25G (0.51 mm), accommodating various imaging field sizes and ensuring compatibility with different scleral incisions.Results: The fabricated micro intraocular OCT probe successfully performed preliminary imaging experiments on in vivo fingers. The Lissajous scanning facilitated comprehensive coverage of the target area, enhancing the imaging capabilities.Discussion: The integration of a piezoelectric tube with quartered outside electrodes into the OCT probe design proved effective for achieving precise control over scanning movements and adaptability to different surgical needs. The design characteristics and practical applications demonstrated the probe’s potential in clinical settings.

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Section: Introductionmentioning

confidence: 99%

Design of an endoscopic OCT probe based on piezoelectric tube with quartered outside electrodes

Hu,

Wu,

Shi

et al. 2024

Front. Bioeng. Biotechnol.

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“…The 1.3 and 1.6-1.7 µm spectral ranges are attractive due to the existence of water 'transparency windows ′ in the nearinfrared band [5,6]. In particular, in recent years, researchers have found that the 1.7 µm waveband is located in a special position in the near-infrared band, and its advantage is that the signal light in this band is not only at the bottom of the absorption peak of water molecules, but also shows a high absorption of fat, so the 1.7 µm waveband ultrashort pulse laser has potential application in multi-photon fluorescence microscopy [7][8][9][10][11], optical coherence tomography [12,13], laser surgery [13] and other fields. The 1.7 µm ultrashort pulsed lasers have been applied in the field of polymerization welding [14] and organic matter detection [15].…”

Section: Introductionmentioning

confidence: 99%

1.7 μm all-fiber figure-9 mode-locked laser based on a fiber Bragg grating

Liu¹,

Zhang²,

Fan³

et al. 2023

Laser Phys.

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Fiber lasers operating at 1.7 μm have very important applications in biomedicine, optical imaging, laser welding, optical communication and other fields because of their rich spectral characteristics in the near-infrared band. We designed and experimentally implemented a 1.7 μm all-fiber figure-9 (F9) mode-locked laser, with a fiber Bragg grating (FBG) acting as both the mirror and the spectrum filter. The all-fiber F9 design made the laser work in the mode-locking state more efficiently. We obtained mode-locked pulses with a central wavelength of 1724.76 nm and a repetition rate of 14.39 MHz when the pump power was 1.1 W, and the pulse width was about 54 ps. Limited by the bandwidth of the FBG, the 3 dB bandwidth of the mode-locked spectrum was about 0.18 nm. The output power was 52 mW at a pump power of 2.5 W. The multi-pulse dynamics were studied by adjusting the pump power and the polarization controllers, and pulse trains of up to six pulses in a group were achieved. The 1.7 μm narrow-bandwidth all-fiber F9 mode-locked laser is simple in structure and easy to build, with potential application as a seed source in high-energy ultrashort pulse lasers.

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Development of 50 kHz Intravascular Swept Source Optical Coherence Tomographic System

Cited by 2 publications

References 0 publications

Design of an endoscopic OCT probe based on piezoelectric tube with quartered outside electrodes

Design of an endoscopic OCT probe based on piezoelectric tube with quartered outside electrodes

1.7 μm all-fiber figure-9 mode-locked laser based on a fiber Bragg grating

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